Merge branch 'develop'

.env.example

@@ -1,5 +1,6 @@
 DOCKER_APP_PORT=8080
 DOCKER_CAPTCHA_PORT=8081
+DOCKER_CAPTCHA_WEBSOCKET_PORT=8082
 DOCKER_DB_PORT=3306
 MYSQL_ROOT_PASSWORD=root_pass
 DB_DATABASE=my-projetcs

app/.dockerignore

@@ -0,0 +1,14 @@
+**/.env
+**/*.env
+**/.env.example
+**/storage/app/*
+**/storage/debugbar
+**/storage/framework/cache/*
+**/storage/framework/sessions/*
+**/storage/framework/views/*
+**/storage/framework/testing/*
+**/storage/logs/*
+**/vendor/
+**/node_modules/
+**/public/build/
+**/public/storage

app/application/app/Dto/Builder/Documentation.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Builder;
+
+use App\Dto\Builder\DocumentationCategory\Category;
+
+final readonly class Documentation
+{
+    public function __construct(
+        private ?bool     $isPublic = null,
+        private ?Category $categoryId = null,
+    ) { }
+
+    public function isPublic(): ?bool
+    {
+        return $this->isPublic;
+    }
+
+    public function getCategoryId(): ?Category
+    {
+        return $this->categoryId;
+    }
+}

app/application/app/Dto/Builder/DocumentationCategory.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Builder;
+
+use App\Dto\Builder\DocumentationCategory\Category;
+
+final readonly class DocumentationCategory
+{
+    public function __construct(
+        private ?bool     $isPublic = null,
+        private ?Category $parentId = null,
+    ) { }
+
+    public function isPublic(): ?bool
+    {
+        return $this->isPublic;
+    }
+
+    public function getParentId(): ?Category
+    {
+        return $this->parentId;
+    }
+}

app/application/app/Dto/Builder/DocumentationCategory/Category.php

@@ -0,0 +1,20 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Builder\DocumentationCategory;
+
+final readonly class Category
+{
+    public function __construct(
+        private ?int $categoryId,
+    ) { }
+
+    public function getCategoryId(): ?int
+    {
+        return $this->categoryId;
+    }
+
+    public function isCategoryNull(): bool
+    {
+        return $this->getCategoryId() === null;
+    }
+}

app/application/app/Dto/Builder/DocumentationVersion.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Builder;
+
+final readonly class DocumentationVersion
+{
+    public function __construct(
+        private ?bool $isPublic = null,
+    ) { }
+
+    public function isPublic(): ?bool
+    {
+        return $this->isPublic;
+    }
+}

app/application/app/Dto/Service/Admin/Project/Documentation/Index.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\Documentation;
+
+use App\Dto\Builder\Documentation;
+use App\Dto\Service\Pages;
+
+final readonly class Index extends Pages
+{
+    public function __construct(
+        private Documentation $documentation,
+        int                   $page
+    ) {
+        parent::__construct($page);
+    }
+
+    public function getDocumentation(): Documentation
+    {
+        return $this->documentation;
+    }
+}

app/application/app/Dto/Service/Admin/Project/Documentation/StoreUpdate.php

@@ -0,0 +1,42 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\Documentation;
+
+use App\Dto\Service\Admin\Project\DocumentationContent\Contents;
+use App\Dto\Service\Dto;
+
+final readonly class StoreUpdate extends Dto
+{
+    public function __construct(
+        private string $slug,
+        private bool $isPublic,
+        private int       $sort,
+        private Contents  $contents,
+        private ?int $categoryId,
+    ) { }
+
+    public function getSlug(): string
+    {
+        return $this->slug;
+    }
+
+    public function isPublic(): bool
+    {
+        return $this->isPublic;
+    }
+
+    public function getCategoryId(): ?int
+    {
+        return $this->categoryId;
+    }
+
+    public function getSort(): int
+    {
+        return $this->sort;
+    }
+
+    public function getContents(): Contents
+    {
+        return $this->contents;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationCategory/Index.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationCategory;
+
+use App\Dto\Builder\DocumentationCategory;
+use App\Dto\Service\Pages;
+
+final readonly class Index extends Pages
+{
+    public function __construct(
+        private DocumentationCategory $documentationCategory,
+        int                           $page
+    ) {
+        parent::__construct($page);
+    }
+
+    public function getDocumentationCategory(): DocumentationCategory
+    {
+        return $this->documentationCategory;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationCategory/StoreUpdate.php

@@ -0,0 +1,42 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationCategory;
+
+use App\Dto\Service\Admin\Project\DocumentationCategoryContent\Contents;
+use App\Dto\Service\Dto;
+
+final readonly class StoreUpdate extends Dto
+{
+    public function __construct(
+        private string    $slug,
+        private bool      $isPublic,
+        private int       $sort,
+        private Contents  $contents,
+        private ?int      $parentId,
+    ) { }
+
+    public function getSlug(): string
+    {
+        return $this->slug;
+    }
+
+    public function isPublic(): bool
+    {
+        return $this->isPublic;
+    }
+
+    public function getSort(): int
+    {
+        return $this->sort;
+    }
+
+    public function getParentId(): ?int
+    {
+        return $this->parentId;
+    }
+
+    public function getContents(): Contents
+    {
+        return $this->contents;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationCategoryContent/Content.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationCategoryContent;
+
+final readonly class Content
+{
+    public function __construct(
+        private int    $languageId,
+        private string $title,
+    ) { }
+
+    public function getLanguageId(): int
+    {
+        return $this->languageId;
+    }
+
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationCategoryContent/Contents.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationCategoryContent;
+
+final class Contents
+{
+    private array $contents = [];
+
+    public function addContent(Content $content): void
+    {
+        $this->contents[$content->getLanguageId()] = $content;
+    }
+
+    public function getContent(int $languageId): ?Content
+    {
+        return $this->contents[$languageId] ?? null;
+    }
+
+    public function getContents(): array
+    {
+        return $this->contents;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationContent/Content.php

@@ -0,0 +1,27 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationContent;
+
+final readonly class Content
+{
+    public function __construct(
+        private int    $languageId,
+        private string $title,
+        private string $content,
+    ) { }
+
+    public function getLanguageId(): int
+    {
+        return $this->languageId;
+    }
+
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+
+    public function getContent(): string
+    {
+        return $this->content;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationContent/Contents.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationContent;
+
+final class Contents
+{
+    private array $contents = [];
+
+    public function addContent(Content $content): void
+    {
+        $this->contents[$content->getLanguageId()] = $content;
+    }
+
+    public function getContent(int $languageId): ?Content
+    {
+        return $this->contents[$languageId] ?? null;
+    }
+
+    public function getContents(): array
+    {
+        return $this->contents;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationVersion/Index.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationVersion;
+
+use App\Dto\Builder\DocumentationVersion;
+use App\Dto\Service\Pages;
+
+final readonly class Index extends Pages
+{
+    public function __construct(
+        private DocumentationVersion $documentationVersionBuildDto,
+        int                          $page
+    ) {
+        parent::__construct($page);
+    }
+
+    public function getDocumentationVersionBuildDto(): DocumentationVersion
+    {
+        return $this->documentationVersionBuildDto;
+    }
+}

app/application/app/Dto/Service/Admin/Project/DocumentationVersion/StoreUpdate.php

@@ -0,0 +1,36 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Admin\Project\DocumentationVersion;
+
+use App\Dto\Service\Dto;
+use App\Enums\DocumentationVersionStatus;
+
+final readonly class StoreUpdate extends Dto
+{
+    public function __construct(
+        private string $title,
+        private string $slug,
+        private bool $isPublic,
+        private DocumentationVersionStatus $status,
+    ) { }
+
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+
+    public function getSlug(): string
+    {
+        return $this->slug;
+    }
+
+    public function isPublic(): bool
+    {
+        return $this->isPublic;
+    }
+
+    public function getStatus(): DocumentationVersionStatus
+    {
+        return $this->status;
+    }
+}

app/application/app/Dto/Service/Admin/Project/Translation/Translations.php

@@ -2,6 +2,7 @@
 
 namespace App\Dto\Service\Admin\Project\Translation;
 
+use App\Enums\DocumentationVersionStatus;
 use App\Exceptions\Dto\Admin\Project\Transaction\TranslationsException;
 
 final class Translations
@@ -23,7 +24,7 @@ public function getTranslations(): array
 
     public static function getTranslationCodes(): array
     {
-        return [
+        $translations = [
             'site.Menu',
             'site.Powered by service',
             'site.About project',
@@ -38,6 +39,17 @@ public static function getTranslationCodes(): array
             'site.attributes.message',
             'site.Message sent successfully',
             'Server Error',
+            'site.Documentation',
+            'site.Documentation not created',
+            'site.Choose version',
+            'site.alert-status-not-supported',
+            'site.alert-status-future',
         ];
+
+        foreach (DocumentationVersionStatus::cases() as $status) {
+            $translations[] = $status->getCodeForTranslation();
+        }
+
+        return $translations;
     }
 }

app/application/app/Dto/Service/Site/Documentation.php

@@ -0,0 +1,47 @@
+<?php declare(strict_types=1);
+
+namespace App\Dto\Service\Site;
+
+use App\Models\DocumentationVersion;
+use App\Models\Project;
+use App\Models\User;
+use App\Services\WebsiteTranslations;
+
+final readonly class Documentation
+{
+    public function __construct(
+        private Project $project,
+        private DocumentationVersion $version,
+        private WebsiteTranslations $websiteTranslations,
+        private ?User $user = null,
+    ) { }
+
+    public function getProject(): Project
+    {
+        return $this->project;
+    }
+
+    public function getVersion(): DocumentationVersion
+    {
+        return $this->version;
+    }
+
+    public function getWebsiteTranslations(): WebsiteTranslations
+    {
+        return $this->websiteTranslations;
+    }
+
+    public function getUser(): ?User
+    {
+        return $this->user;
+    }
+
+    public function toArray(): array
+    {
+        return [
+            'project'              => $this->getProject(),
+            'version'              => $this->getVersion(),
+            'websiteTranslations'  => $this->getWebsiteTranslations(),
+        ];
+    }
+}

app/application/app/Enums/CacheTag.php

@@ -9,6 +9,7 @@ enum CacheTag: string
 {
     case Project = 'project';
     case ProjectTranslation = 'project_translation';
+    case DocumantationVersion = 'documantation_version';
 
     public function getCache(): TaggedCache
     {

app/application/app/Enums/DocumentationVersionStatus.php

@@ -0,0 +1,46 @@
+<?php declare(strict_types=1);
+
+namespace App\Enums;
+
+use App\Services\WebsiteTranslations;
+use Illuminate\Support\Collection;
+
+enum DocumentationVersionStatus: int
+{
+    case NotSupported   = 0;
+    case Supported      = 50;
+    case CurrentVersion = 100;
+    case FutureVersion  = 150;
+
+    public function getTitle(?WebsiteTranslations $websiteTranslations = null): string
+    {
+        if (\is_null($websiteTranslations)) {
+            return __($this->getCodeForTranslation());
+        }
+
+        return $websiteTranslations->translate($this->getCodeForTranslation());
+    }
+
+    public function getCodeForTranslation(): string
+    {
+        return 'version-status.' . $this->name;
+    }
+
+    public static function toArray(): array
+    {
+        $items = [];
+        foreach (self::cases() as $item) {
+            $items[] = [
+                'name'  => $item->name,
+                'value' => $item->value,
+                'title' => $item->getTitle(),
+            ];
+        }
+        return $items;
+    }
+
+    public static function toCollection(): Collection
+    {
+        return collect(self::toArray());
+    }
+}

app/application/app/Enums/Permission.php

@@ -12,6 +12,8 @@ enum Permission: string
     case ProjectLink = 'project-link';
     case ProjectTranslation = 'project-translation';
     case ProjectFeedback = 'project-feedback';
+    case Documentation = 'documentation';
+    case DocumentationCategory = 'documentation-category';
 
     public function getPermissions(): array
     {

app/application/app/Enums/Site/ProjectSection.php

@@ -5,15 +5,18 @@
 use App\Models\Project;
 use App\Models\ProjectLanguage;
 
-enum ProjectSection
+enum ProjectSection: string
 {
-    case Home;
+    case Home                  = 'home';
-    case Feedback;
+    case Feedback              = 'feedback';
-    case FeedbackSend;
+    case FeedbackSend          = 'feedback.send';
+    case Documentation         = 'documentation';
+    case DocumentationVersion  = 'documentation.version';
+    case DocumentationCategory = 'documentation.category';
+    case DocumentationView     = 'documentation.view';
 
-    public function url(Project $project, ?ProjectLanguage $language = null): string
+    public function url(Project $project, ?ProjectLanguage $language = null, array $parameters = []): string
     {
-        $parameters = [];
         $prefixProject = '';
         if ($project->http_host === null) {
             $prefixProject = 'project.';
@@ -26,12 +29,7 @@ public function url(Project $project, ?ProjectLanguage $language = null): string
             $prefixLanguage = '-language';
         }
 
-        $route = match ($this) {
+        $route = \route($prefixProject . $this->value . $prefixLanguage, $parameters, false);
-            self::Home => \route($prefixProject . 'home' . $prefixLanguage, $parameters, false),
-
-            self::Feedback => \route($prefixProject . 'feedback' . $prefixLanguage, $parameters, false),
-            self::FeedbackSend => \route($prefixProject . 'feedback.send' . $prefixLanguage, $parameters, false),
-        };
 
         return $project->http_host . $route;
     }

app/application/app/Exceptions/Services/DocumentationCategory/ParentException.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+namespace App\Exceptions\Services\DocumentationCategory;
+
+final class ParentException extends \Exception
+{
+
+}

app/application/app/Exceptions/Services/DocumentationCategoryContent/ContentSaveException.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+namespace App\Exceptions\Services\DocumentationCategoryContent;
+
+final class ContentSaveException extends \Exception
+{
+
+}

app/application/app/Exceptions/Services/DocumentationContent/ContentSaveException.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+namespace App\Exceptions\Services\DocumentationContent;
+
+final class ContentSaveException extends \Exception
+{
+
+}

app/application/app/Exceptions/Services/ServiceException.php

@@ -0,0 +1,19 @@
+<?php declare(strict_types=1);
+
+namespace App\Exceptions\Services;
+
+use App\Contracts\ServiceResultError as ServiceResultErrorContract;
+
+final class ServiceException extends \Exception
+{
+    public function __construct(
+        private readonly ServiceResultErrorContract $serviceResultError
+    ) {
+        parent::__construct($this->serviceResultError->getMessage());
+    }
+
+    public function getServiceResultError(): ServiceResultErrorContract
+    {
+        return $this->serviceResultError;
+    }
+}

app/application/app/Http/Controllers/Admin/Projects/DocumentationCategoriesController.php

@@ -0,0 +1,105 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Controllers\Admin\Projects;
+
+use App\Dto\QuerySettingsDto;
+use App\Http\Controllers\Admin\Controller;
+use App\Http\Requests\Admin\Projects\DocumentationCategories\IndexRequest;
+use App\Http\Requests\Admin\Projects\DocumentationCategories\StoreUpdateRequest;
+use App\Services\Admin\Project\DocumentationCategoryService;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\View\View;
+
+final class DocumentationCategoriesController extends Controller
+{
+    public function __construct(
+        private readonly DocumentationCategoryService $documentationCategoryService,
+    ) { }
+
+    public function index(int $projectId, int $versionId, IndexRequest $request): View
+    {
+        $user = $request->user();
+        $data = $request->getDto();
+        $querySettingsDto = new QuerySettingsDto(
+            limit: 20,
+            page: $data->getPage(),
+            queryWith: []
+        );
+
+        $result = $this->documentationCategoryService->index($projectId, $versionId, $data->getDocumentationCategory(), $querySettingsDto, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-categories/index', $result->getData());
+    }
+
+    public function create(int $projectId, int $versionId, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationCategoryService->create($projectId, $versionId, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-categories/create', $result->getData());
+    }
+
+    public function edit(int $projectId, int $versionId, int $id, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationCategoryService->edit($projectId, $versionId, $id, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-categories/edit', $result->getData());
+    }
+
+    public function store(int $projectId, int $versionId, StoreUpdateRequest $request): RedirectResponse
+    {
+        $data = $request->getDto();
+        $user = $request->user();
+        $result = $this->documentationCategoryService->store($projectId, $versionId, $data, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.categories.edit', [
+            'project' => $projectId,
+            'version' => $versionId,
+            'category' => $result->getModel()->id,
+        ])->withSuccess($result->getMessage());
+    }
+
+    public function update(int $projectId, int $versionId, int $id, StoreUpdateRequest $request): RedirectResponse
+    {
+        $data = $request->getDto();
+        $user = $request->user();
+        $result = $this->documentationCategoryService->update($projectId, $versionId, $id, $data, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.categories.edit', [
+            'project' => $projectId,
+            'version' => $versionId,
+            'category' => $result->getModel()->id,
+        ])->withSuccess($result->getMessage());
+    }
+
+    public function destroy(int $projectId, int $versionId, int $id, Request $request): RedirectResponse
+    {
+        $user = $request->user();
+        $result = $this->documentationCategoryService->destroy($projectId, $versionId, $id, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.categories.index', [
+            'project' => $projectId,
+            'version' => $versionId,
+        ])->withSuccess($result->getMessage());
+    }
+}

app/application/app/Http/Controllers/Admin/Projects/DocumentationVersionController.php

@@ -0,0 +1,111 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Controllers\Admin\Projects;
+
+use App\Dto\QuerySettingsDto;
+use App\Http\Controllers\Admin\Controller;
+use App\Http\Requests\Admin\Projects\DocumentVersions\IndexRequest;
+use App\Http\Requests\Admin\Projects\DocumentVersions\StoreUpdateRequest;
+use App\Services\Admin\Project\DocumentationVersionService;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\View\View;
+
+final class DocumentationVersionController extends Controller
+{
+    public function __construct(
+        private readonly DocumentationVersionService $documentationVersionService,
+    ) { }
+
+    public function index(int $projectId, IndexRequest $request): View
+    {
+        $user = $request->user();
+        $data = $request->getDto();
+        $querySettingsDto = new QuerySettingsDto(
+            limit: 20,
+            page: $data->getPage(),
+            queryWith: []
+        );
+
+        $result = $this->documentationVersionService->index($projectId, $data->getDocumentationVersionBuildDto(), $querySettingsDto, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-versions/index', $result->getData());
+    }
+
+    public function show(int $projectId, int $id, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationVersionService->show($projectId, $id, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-versions/show', $result->getData());
+    }
+
+    public function create(int $projectId, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationVersionService->create($projectId, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-versions/create', $result->getData());
+    }
+
+    public function edit(int $projectId, int $id, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationVersionService->edit($projectId, $id, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentation-versions/edit', $result->getData());
+    }
+
+    public function store(int $projectId, StoreUpdateRequest $request): RedirectResponse
+    {
+        $data = $request->getDto();
+        $user = $request->user();
+        $result = $this->documentationVersionService->store($projectId, $data, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.edit', [
+            'project' => $projectId,
+            'documentation_version' => $result->getModel()->id,
+        ])->withSuccess($result->getMessage());
+    }
+
+    public function update(int $projectId, int $id, StoreUpdateRequest $request): RedirectResponse
+    {
+        $data = $request->getDto();
+        $user = $request->user();
+        $result = $this->documentationVersionService->update($projectId, $id, $data, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.edit', [
+            'project' => $projectId,
+            'documentation_version' => $result->getModel()->id,
+        ])->withSuccess($result->getMessage());
+    }
+
+    public function destroy(int $projectId, int $id, Request $request): RedirectResponse
+    {
+        $user = $request->user();
+        $result = $this->documentationVersionService->destroy($projectId, $id, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.index', ['project' => $projectId])->withSuccess($result->getMessage());
+    }
+}

app/application/app/Http/Controllers/Admin/Projects/DocumentationsController.php

@@ -0,0 +1,105 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Controllers\Admin\Projects;
+
+use App\Dto\QuerySettingsDto;
+use App\Http\Controllers\Admin\Controller;
+use App\Http\Requests\Admin\Projects\Documentations\IndexRequest;
+use App\Http\Requests\Admin\Projects\Documentations\StoreUpdateRequest;
+use App\Services\Admin\Project\DocumentationService;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\View\View;
+
+final class DocumentationsController extends Controller
+{
+    public function __construct(
+        private readonly DocumentationService $documentationService,
+    ) { }
+
+    public function index(int $projectId, int $versionId, IndexRequest $request): View
+    {
+        $user = $request->user();
+        $data = $request->getDto();
+        $querySettingsDto = new QuerySettingsDto(
+            limit: 20,
+            page: $data->getPage(),
+            queryWith: []
+        );
+
+        $result = $this->documentationService->index($projectId, $versionId, $data->getDocumentation(), $querySettingsDto, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentations/index', $result->getData());
+    }
+
+    public function create(int $projectId, int $versionId, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationService->create($projectId, $versionId, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentations/create', $result->getData());
+    }
+
+    public function edit(int $projectId, int $versionId, int $id, Request $request): View
+    {
+        $user = $request->user();
+        $result = $this->documentationService->edit($projectId, $versionId, $id, $user);
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('admin/projects/documentations/edit', $result->getData());
+    }
+
+    public function store(int $projectId, int $versionId, StoreUpdateRequest $request): RedirectResponse
+    {
+        $data = $request->getDto();
+        $user = $request->user();
+        $result = $this->documentationService->store($projectId, $versionId, $data, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.documentations.edit', [
+            'project' => $projectId,
+            'version' => $versionId,
+            'documentation' => $result->getModel()->id,
+        ])->withSuccess($result->getMessage());
+    }
+
+    public function update(int $projectId, int $versionId, int $id, StoreUpdateRequest $request): RedirectResponse
+    {
+        $data = $request->getDto();
+        $user = $request->user();
+        $result = $this->documentationService->update($projectId, $versionId, $id, $data, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.documentations.edit', [
+            'project' => $projectId,
+            'version' => $versionId,
+            'documentation' => $result->getModel()->id,
+        ])->withSuccess($result->getMessage());
+    }
+
+    public function destroy(int $projectId, int $versionId, int $id, Request $request): RedirectResponse
+    {
+        $user = $request->user();
+        $result = $this->documentationService->destroy($projectId, $versionId, $id, $user);
+        if ($result->isError()) {
+            return redirect()->back()->withInput()->withErrors($result->getErrorsOrMessage());
+        }
+
+        return redirect()->route('admin.projects.documentation-versions.documentations.index', [
+            'project' => $projectId,
+            'version' => $versionId,
+        ])->withSuccess($result->getMessage());
+    }
+}

app/application/app/Http/Controllers/Site/DocumentationController.php

@@ -0,0 +1,96 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Controllers\Site;
+
+use App\Dto\Service\Site\Documentation;
+use App\Services\Site\DocumentationService;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\View\View;
+
+final class DocumentationController extends Controller
+{
+    public function __construct(
+        private readonly DocumentationService $documentationService,
+    ) { }
+
+    public function defaultVersion(Request $request): RedirectResponse | View
+    {
+        $project = $request->get('project');
+        $websiteTranslations = $request->get('websiteTranslations');
+
+        $result = $this->documentationService->defaultVersion($project, $request->user());
+        if ($result->isError()) {
+            if ($result->getCode() === 404) {
+                return view('site.projects.documentation.no-default-version', [
+                    'project'             => $project,
+                    'websiteTranslations' => $websiteTranslations,
+                ]);
+            }
+            $this->errors($result);
+        }
+
+        $url = \App\Enums\Site\ProjectSection::DocumentationVersion->url($project, $websiteTranslations->getLanguage(), ['version' => $result->getVersion()->slug]);
+        /**
+         * 302 redirect because the documentation version can change at any time.
+         */
+        return redirect($url, 302);
+    }
+
+    public function index(Request $request): View
+    {
+        $documentation = new Documentation(
+            project:              $request->get('project'),
+            version:              $request->get('version'),
+            websiteTranslations:  $request->get('websiteTranslations'),
+            user:                 $request->user(),
+        );
+        $result = $this->documentationService->index($documentation);
+
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+
+        return view('site.projects.documentation.index', $result->getData());
+    }
+
+    public function category(string $slug, Request $request): View
+    {
+        $documentation = new Documentation(
+            project:              $request->get('project'),
+            version:              $request->get('version'),
+            websiteTranslations:  $request->get('websiteTranslations'),
+            user:                 $request->user(),
+        );
+        $result = $this->documentationService->category($slug, $documentation);
+
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+        if ($result->isTranslation()) {
+            return $this->viewPageWithoutTranslation($result);
+        }
+
+        return view('site.projects.documentation.category', $result->getData());
+    }
+
+    public function view(string $slug, Request $request): View
+    {
+        $documentation = new Documentation(
+            project:              $request->get('project'),
+            version:              $request->get('version'),
+            websiteTranslations:  $request->get('websiteTranslations'),
+            user:                 $request->user(),
+        );
+        $result = $this->documentationService->view($slug, $documentation);
+
+        if ($result->isError()) {
+            $this->errors($result);
+        }
+        if ($result->isTranslation()) {
+            return $this->viewPageWithoutTranslation($result);
+        }
+
+        return view('site.projects.documentation.view', $result->getData());
+    }
+}

app/application/app/Http/Controllers/Site/FeedbackController.php

@@ -3,7 +3,6 @@
 namespace App\Http\Controllers\Site;
 
 use App\Http\Requests\Site\Feedback\SendRequest;
-use App\Models\ProjectFeedback;
 use App\Services\Site\FeedbackService;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;

app/application/app/Http/Controllers/Site/ProjectsController.php

@@ -16,7 +16,6 @@ public function index(Request $request): View
     {
         $user    = $request->user();
         $project = $request->get('project');
-        $websiteTranslations = $request->get('websiteTranslations');
 
         if (\is_null($project)) {
             $with = ['storage'];
@@ -28,7 +27,8 @@ public function index(Request $request): View
             return \view('site.projects.index', $result->getData());
         }
 
-        $result = $this->projectService->getAboutByProject($project, $websiteTranslations, $request->user());
+        $websiteTranslations = $request->get('websiteTranslations');
+        $result = $this->projectService->getAboutByProject($project, $websiteTranslations, $user);
         if ($result->isError()) {
             $this->errors($result);
         }

app/application/app/Http/Middleware/DocumentationVersion.php

@@ -0,0 +1,40 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Middleware;
+
+use App\Enums\CacheTag;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+final readonly class DocumentationVersion
+{
+    public function handle(Request $request, \Closure $next): Response
+    {
+        $project = $request->get('project');
+        $versionSlug = $request->route()?->parameter('version');
+        if ($versionSlug === null || $project === null) {
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        $seconds = 3600;
+        $version = CacheTag::DocumantationVersion->getCache()->remember(self::class . $project->id . '-' . $versionSlug, $seconds, function () use ($project, $versionSlug) {
+            return $project->documentationVersions()->where('slug', $versionSlug)->first() ?? false;
+        });
+        if ($version === false) {
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        unset($request->route()->parameters['version']);
+
+        $request->attributes->set('version', $version);
+
+        if (
+            $version->is_public === false
+            && ( $request->user() === null || $request->user()->cannot('view', $version) )
+        ) {
+            \abort(Response::HTTP_FORBIDDEN);
+        }
+
+        return $next($request);
+    }
+}

app/application/app/Http/Middleware/IsProject.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Middleware;
+
+use App\Models\Project;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+final class IsProject
+{
+    public function handle(Request $request, \Closure $next): Response
+    {
+        $project = $request->get('project');
+        if (\is_null($project)) {
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        if ($project instanceof Project === false) {
+            \report("$project must be an instance of Project");
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        if (
+            $project->is_public === false
+            && ( $request->user() === null || $request->user()->cannot('view', $project) )
+        ) {
+            \abort(Response::HTTP_FORBIDDEN);
+        }
+
+        return $next($request);
+    }
+}

app/application/app/Http/Middleware/IsWebsiteTranslations.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Middleware;
+
+use App\Services\WebsiteTranslations;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+final class IsWebsiteTranslations
+{
+    public function handle(Request $request, \Closure $next): Response
+    {
+        $websiteTranslations = $request->get('websiteTranslations');
+        if (\is_null($websiteTranslations)) {
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        if ($websiteTranslations instanceof WebsiteTranslations === false) {
+            \report("$websiteTranslations must be an instance of WebsiteTranslations");
+            \abort(Response::HTTP_NOT_FOUND);
+        }
+
+        return $next($request);
+    }
+}

app/application/app/Http/Middleware/ProjectAndLanguage.php

@@ -7,7 +7,7 @@
 use Symfony\Component\HttpFoundation\Response;
 use Closure;
 
-class ProjectAndLanguage extends ProjectLanguage
+final class ProjectAndLanguage extends ProjectLanguage
 {
     public function handle(Request $request, Closure $next): Response
     {

app/application/app/Http/Requests/Admin/Projects/DocumentVersions/IndexRequest.php

@@ -0,0 +1,29 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Requests\Admin\Projects\DocumentVersions;
+
+use App\Contracts\FormRequestDto;
+use App\Dto\Builder\DocumentationVersion;
+use App\Dto\Service\Admin\Project\DocumentationVersion\Index;
+use Illuminate\Foundation\Http\FormRequest;
+
+final class IndexRequest extends FormRequest implements FormRequestDto
+{
+    /**
+     * Get the validation rules that apply to the request.
+     */
+    public function rules(): array
+    {
+        return [
+            'page' => ['nullable', 'numeric', 'min:1']
+        ];
+    }
+
+    public function getDto(): Index
+    {
+        return new Index(
+            documentationVersionBuildDto: new DocumentationVersion(),
+            page: (int) $this->input('page', 1)
+        );
+    }
+}

app/application/app/Http/Requests/Admin/Projects/DocumentVersions/StoreUpdateRequest.php

@@ -0,0 +1,35 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Requests\Admin\Projects\DocumentVersions;
+
+use App\Contracts\FormRequestDto;
+use App\Dto\Service\Admin\Project\DocumentationVersion\StoreUpdate;
+use App\Enums\DocumentationVersionStatus;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rules\Enum;
+
+final class StoreUpdateRequest extends FormRequest implements FormRequestDto
+{
+    /**
+     * Get the validation rules that apply to the request.
+     */
+    public function rules(): array
+    {
+        return [
+            'title' => ['required', 'string', 'max:255'],
+            'slug' => ['required', 'string', 'max:70', 'regex:/^[a-z0-9._-]+$/'],
+            'is_public' => ['required', 'boolean'],
+            'status' => ['required', new Enum(DocumentationVersionStatus::class)],
+        ];
+    }
+
+    public function getDto(): StoreUpdate
+    {
+        return new StoreUpdate(
+            title: $this->input('title'),
+            slug: $this->input('slug'),
+            isPublic: (bool) $this->input('is_public', false),
+            status: DocumentationVersionStatus::from((int) $this->input('status')),
+        );
+    }
+}

app/application/app/Http/Requests/Admin/Projects/DocumentationCategories/IndexRequest.php

@@ -0,0 +1,29 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Requests\Admin\Projects\DocumentationCategories;
+
+use App\Contracts\FormRequestDto;
+use App\Dto\Builder\DocumentationCategory;
+use App\Dto\Service\Admin\Project\DocumentationCategory\Index;
+use Illuminate\Foundation\Http\FormRequest;
+
+final class IndexRequest extends FormRequest implements FormRequestDto
+{
+    /**
+     * Get the validation rules that apply to the request.
+     */
+    public function rules(): array
+    {
+        return [
+            'page' => ['nullable', 'numeric', 'min:1']
+        ];
+    }
+
+    public function getDto(): Index
+    {
+        return new Index(
+            documentationCategory: new DocumentationCategory(),
+            page: (int) $this->input('page', 1)
+        );
+    }
+}

app/application/app/Http/Requests/Admin/Projects/DocumentationCategories/StoreUpdateRequest.php

@@ -0,0 +1,54 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Requests\Admin\Projects\DocumentationCategories;
+
+use App\Contracts\FormRequestDto;
+use App\Dto\Service\Admin\Project\DocumentationCategory\StoreUpdate;
+use App\Dto\Service\Admin\Project\DocumentationCategoryContent\Content;
+use App\Dto\Service\Admin\Project\DocumentationCategoryContent\Contents;
+use Illuminate\Foundation\Http\FormRequest;
+
+final class StoreUpdateRequest extends FormRequest implements FormRequestDto
+{
+    /**
+     * Get the validation rules that apply to the request.
+     */
+    public function rules(): array
+    {
+        return [
+            'slug' => ['required', 'string', 'max:200', 'regex:/^[a-z0-9._-]+$/'],
+            'is_public' => ['required', 'boolean'],
+            'sort' => ['required', 'integer', 'min:-1000', 'max:1000'],
+            'parent_id' => ['nullable', 'integer', 'exists:documentation_categories,id'],
+            'content.*.title' => ['required', 'string', 'max:255'],
+        ];
+    }
+
+    public function getDto(): StoreUpdate
+    {
+        $parentId = $this->input('parent_id', null);
+        if (!\is_null($parentId)) {
+            $parentId = (int) $parentId;
+        }
+
+        return new StoreUpdate(
+            slug: $this->input('slug'),
+            isPublic: (bool) $this->input('is_public', false),
+            sort: (int) $this->input('sort'),
+            contents: $this->getContents(),
+            parentId: $parentId,
+        );
+    }
+
+    private function getContents(): Contents
+    {
+        $contents = new Contents();
+        foreach ($this->input('content', []) as $languageId => $content) {
+            $contents->addContent(new Content(
+                languageId: (int) $languageId,
+                title:      $content['title'],
+            ));
+        }
+        return $contents;
+    }
+}

app/application/app/Http/Requests/Admin/Projects/Documentations/IndexRequest.php

@@ -0,0 +1,29 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Requests\Admin\Projects\Documentations;
+
+use App\Contracts\FormRequestDto;
+use App\Dto\Builder\Documentation;
+use App\Dto\Service\Admin\Project\Documentation\Index;
+use Illuminate\Foundation\Http\FormRequest;
+
+final class IndexRequest extends FormRequest implements FormRequestDto
+{
+    /**
+     * Get the validation rules that apply to the request.
+     */
+    public function rules(): array
+    {
+        return [
+            'page' => ['nullable', 'numeric', 'min:1']
+        ];
+    }
+
+    public function getDto(): Index
+    {
+        return new Index(
+            documentation: new Documentation(),
+            page: (int) $this->input('page', 1)
+        );
+    }
+}

app/application/app/Http/Requests/Admin/Projects/Documentations/StoreUpdateRequest.php

@@ -0,0 +1,56 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Requests\Admin\Projects\Documentations;
+
+use App\Contracts\FormRequestDto;
+use App\Dto\Service\Admin\Project\Documentation\StoreUpdate;
+use App\Dto\Service\Admin\Project\DocumentationContent\Content;
+use App\Dto\Service\Admin\Project\DocumentationContent\Contents;
+use Illuminate\Foundation\Http\FormRequest;
+
+final class StoreUpdateRequest extends FormRequest implements FormRequestDto
+{
+    /**
+     * Get the validation rules that apply to the request.
+     */
+    public function rules(): array
+    {
+        return [
+            'slug' => ['required', 'string', 'max:200', 'regex:/^[a-z0-9._-]+$/'],
+            'is_public' => ['required', 'boolean'],
+            'sort' => ['required', 'integer', 'min:-1000', 'max:1000'],
+            'category_id' => ['nullable', 'integer', 'exists:documentation_categories,id'],
+            'content.*.title' => ['required', 'string', 'max:255'],
+            'content.*.content' => ['nullable', 'string'],
+        ];
+    }
+
+    public function getDto(): StoreUpdate
+    {
+        $categoryId = $this->input('category_id', null);
+        if (!\is_null($categoryId)) {
+            $categoryId = (int) $categoryId;
+        }
+
+        return new StoreUpdate(
+            slug: $this->input('slug'),
+            isPublic: (bool) $this->input('is_public', false),
+            sort: (int) $this->input('sort'),
+            contents: $this->getContents(),
+            categoryId: $categoryId,
+        );
+    }
+
+    private function getContents(): Contents
+    {
+        $contents = new Contents();
+        foreach ($this->input('content', []) as $languageId => $content) {
+            $contents->addContent(new Content(
+                languageId: (int) $languageId,
+                title:      $content['title'],
+                content:    $content['content'] ?? '',
+            ));
+        }
+        return $contents;
+    }
+}

app/application/app/Models/Documentation.php

@@ -0,0 +1,68 @@
+<?php declare(strict_types=1);
+
+namespace App\Models;
+
+use App\Models\Scopes\SortScope;
+use Illuminate\Database\Eloquent\Attributes\ScopedBy;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+#[ScopedBy([SortScope::class])]
+final class Documentation extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $table = 'documentation';
+
+    /**
+     * The model's default values for attributes.
+     *
+     * @var array
+     */
+    protected $attributes = [
+        'sort'      => 100,
+        'is_public' => true,
+    ];
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'slug',
+        'is_public',
+        'category_id',
+    ];
+
+    /**
+     * Get the attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'is_public' => 'boolean',
+        ];
+    }
+
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(DocumentationCategory::class, 'category_id', 'id');
+    }
+
+    public function contents(): HasMany
+    {
+        return $this->hasMany(DocumentationContent::class, 'documentation_id', 'id');
+    }
+
+    public function content(): HasOne
+    {
+        return $this->hasOne(DocumentationContent::class, 'documentation_id', 'id');
+    }
+}

app/application/app/Models/DocumentationCategory.php

@@ -0,0 +1,75 @@
+<?php declare(strict_types=1);
+
+namespace App\Models;
+
+use App\Models\Scopes\SortScope;
+use Illuminate\Database\Eloquent\Attributes\ScopedBy;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Staudenmeir\LaravelAdjacencyList\Eloquent\HasRecursiveRelationships;
+
+#[ScopedBy([SortScope::class])]
+final class DocumentationCategory extends Model
+{
+    use HasFactory, SoftDeletes, HasRecursiveRelationships;
+
+    protected $table = 'documentation_categories';
+
+    /**
+     * The model's default values for attributes.
+     *
+     * @var array
+     */
+    protected $attributes = [
+        'sort'      => 100,
+        'is_public' => true,
+    ];
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'slug',
+        'sort',
+        'parent_id',
+        'is_public',
+    ];
+
+    /**
+     * Get the attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'is_public' => 'boolean',
+        ];
+    }
+
+    public function parent(): BelongsTo
+    {
+        return $this->belongsTo(DocumentationCategory::class, 'parent_id');
+    }
+
+    public function contents(): HasMany
+    {
+        return $this->hasMany(DocumentationCategoryContent::class, 'category_id');
+    }
+
+    public function content(): HasOne
+    {
+        return $this->hasOne(DocumentationCategoryContent::class, 'category_id');
+    }
+
+    public function version(): BelongsTo
+    {
+        return $this->belongsTo(DocumentationVersion::class, 'version_id');
+    }
+}

app/application/app/Models/DocumentationCategoryContent.php

@@ -0,0 +1,24 @@
+<?php declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+final class DocumentationCategoryContent extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $table = 'documentation_category_content';
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'title',
+        'language_id',
+    ];
+}

app/application/app/Models/DocumentationContent.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+final class DocumentationContent extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $table = 'documentation_content';
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'title',
+        'content',
+        'language_id',
+    ];
+}

app/application/app/Models/DocumentationVersion.php

@@ -0,0 +1,78 @@
+<?php declare(strict_types=1);
+
+namespace App\Models;
+
+use App\Enums\DocumentationVersionStatus;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+final class DocumentationVersion extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $table = 'documentation_versions';
+
+    /**
+     * The model's default values for attributes.
+     *
+     * @var array
+     */
+    protected $attributes = [
+        'is_public' => true,
+        'status'    => DocumentationVersionStatus::CurrentVersion,
+    ];
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'title',
+        'slug',
+        'is_public',
+        'status',
+    ];
+
+    /**
+     * The "booted" method of the model.
+     */
+    protected static function booted(): void
+    {
+        static::addGlobalScope('status', function (Builder $builder) {
+            $builder->orderBy('status', 'desc');
+        });
+    }
+
+    /**
+     * Get the attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'is_public' => 'boolean',
+            'status'    => DocumentationVersionStatus::class,
+        ];
+    }
+
+    public function project(): BelongsTo
+    {
+        return $this->belongsTo(Project::class);
+    }
+
+    public function documentations(): HasMany
+    {
+        return $this->hasMany(Documentation::class, 'version_id');
+    }
+
+    public function categories(): HasMany
+    {
+        return $this->hasMany(DocumentationCategory::class, 'version_id');
+    }
+}

app/application/app/Models/Project.php

@@ -62,4 +62,9 @@ public function feedbacks(): HasMany
     {
         return $this->hasMany(ProjectFeedback::class);
     }
+
+    public function documentationVersions(): HasMany
+    {
+        return $this->hasMany(DocumentationVersion::class);
+    }
 }

app/application/app/Policies/DocumentationCategoryPolicy.php

@@ -0,0 +1,34 @@
+<?php declare(strict_types=1);
+
+namespace App\Policies;
+
+use App\Models\DocumentationCategory;
+use App\Models\User;
+
+final readonly class DocumentationCategoryPolicy extends Policy
+{
+    public function viewAny(User $user): bool
+    {
+        return $user->hasPermission('documentation-category.view');
+    }
+
+    public function view(User $user, DocumentationCategory $category): bool
+    {
+        return $user->hasPermission('documentation-category.view');
+    }
+
+    public function create(User $user): bool
+    {
+        return $user->hasPermission('documentation-category.create');
+    }
+
+    public function update(User $user, DocumentationCategory $category): bool
+    {
+        return $user->hasPermission('documentation.update');
+    }
+
+    public function delete(User $user, DocumentationCategory $category): bool
+    {
+        return $user->hasPermission('documentation-category.delete');
+    }
+}

app/application/app/Policies/DocumentationPolicy.php

@@ -0,0 +1,34 @@
+<?php declare(strict_types=1);
+
+namespace App\Policies;
+
+use App\Models\Documentation;
+use App\Models\User;
+
+final readonly class DocumentationPolicy extends Policy
+{
+    public function viewAny(User $user): bool
+    {
+        return $user->hasPermission('documentation.view');
+    }
+
+    public function view(User $user, Documentation $documentation): bool
+    {
+        return $user->hasPermission('documentation.view');
+    }
+
+    public function create(User $user): bool
+    {
+        return $user->hasPermission('documentation.create');
+    }
+
+    public function update(User $user, Documentation $documentation): bool
+    {
+        return $user->hasPermission('documentation.update');
+    }
+
+    public function delete(User $user, Documentation $documentation): bool
+    {
+        return $user->hasPermission('documentation.delete');
+    }
+}

app/application/app/Policies/DocumentationVersionPolicy.php

@@ -0,0 +1,39 @@
+<?php declare(strict_types=1);
+
+namespace App\Policies;
+
+use App\Models\DocumentationVersion;
+use App\Models\User;
+
+final readonly class DocumentationVersionPolicy extends Policy
+{
+    public function viewAny(User $user): bool
+    {
+        // Not a mistake or typo. Shared rights with Documentation.
+        return $user->hasPermission('documentation.view');
+    }
+
+    public function view(User $user, DocumentationVersion $documentationVersion): bool
+    {
+        // Not a mistake or typo. Shared rights with Documentation.
+        return $user->hasPermission('documentation.view');
+    }
+
+    public function create(User $user): bool
+    {
+        // Not a mistake or typo. Shared rights with Documentation.
+        return $user->hasPermission('documentation.create');
+    }
+
+    public function update(User $user, DocumentationVersion $documentationVersion): bool
+    {
+        // Not a mistake or typo. Shared rights with Documentation.
+        return $user->hasPermission('documentation.update');
+    }
+
+    public function delete(User $user, DocumentationVersion $documentationVersion): bool
+    {
+        // Not a mistake or typo. Shared rights with Documentation.
+        return $user->hasPermission('documentation.delete');
+    }
+}

app/application/app/Providers/AppServiceProvider.php

@@ -59,6 +59,8 @@ public function boot(): void
 
         Route::pattern('language', '[a-z_]+');
         Route::pattern('project', '[a-z0-9_-]+');
+        Route::pattern('slug', '[a-z0-9._-]+');
+        Route::pattern('version', '[a-z0-9._-]+');
 
         $this->configureRateLimiting();
         Gate::define('AdminPanel', [\App\Policies\AdminPanel::class, 'view']);

app/application/app/Repositories/DocumentationCategoryRepository.php

@@ -0,0 +1,97 @@
+<?php declare(strict_types=1);
+
+namespace App\Repositories;
+
+use App\Contracts\Search;
+use App\Models\DocumentationCategory;
+use App\Models\DocumentationVersion;
+use App\Models\ProjectLanguage;
+use App\Services\DocumentationCategory\BuilderCommand;
+use App\Services\Search\CreateSearchInstanceCommand;
+use App\Dto\Builder\DocumentationCategory as DocumentationCategoryBuilderDto;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Str;
+
+final readonly class DocumentationCategoryRepository
+{
+    public function __construct(
+        private CreateSearchInstanceCommand $createSearchInstanceCommand,
+        private BuilderCommand $builderCommand
+    ) { }
+
+    public function getCategories(int $versionId, DocumentationCategoryBuilderDto $documentationCategoryBuilderDto, array $with = []): Search
+    {
+        $query = $this->builderCommand->execute(
+            query: DocumentationCategory::query()->where('version_id', $versionId)->with($with),
+            documentationCategoryBuilderDto: $documentationCategoryBuilderDto
+        );
+
+        return $this->createSearchInstanceCommand->execute($query);
+    }
+
+    public function getCategoryById(int $id): ?DocumentationCategory
+    {
+        return DocumentationCategory::query()->where('id', $id)->first();
+    }
+
+    public function getCategoryBySlugWithContent(string $slug, int $versionId, ProjectLanguage $language): ?DocumentationCategory
+    {
+        $with = [
+            'content' => function (HasOne $hasOne) use ($language) {
+                $hasOne->where('language_id', $language->id);
+            }
+        ];
+
+        return DocumentationCategory::query()
+            ->where('version_id', $versionId)
+            ->where('slug', $slug)
+            ->with($with)
+            ->first();
+    }
+
+    public function isExistsSlug(int $versionId, string $slug, ?int $exceptId = null): bool
+    {
+        return DocumentationCategory::query()
+            ->where('version_id', $versionId)
+            ->where('slug', Str::lower($slug))
+            ->when($exceptId, function (Builder $query, int $exceptId) {
+                $query->where('id', '!=', $exceptId);
+            })
+            ->withTrashed()
+            ->exists();
+    }
+
+    public function getForSelect(?ProjectLanguage $defaultLanguage, ?DocumentationCategory $exceptCategory = null, array $withExcepts = []): array
+    {
+        $with = [
+            'content' => function (HasOne $hasOne) use ($defaultLanguage) {
+                $hasOne->when($defaultLanguage, function (Builder $query, ProjectLanguage $defaultLanguage) {
+                    $query->where('language_id', $defaultLanguage->id);
+                });
+            }
+        ];
+
+        $categories = DocumentationCategory::query()
+            ->with($with)
+            ->when($exceptCategory, function (Builder $query, DocumentationCategory $exceptCategory) {
+                $query->whereNotIn(
+                    'id',
+                    $exceptCategory->descendantsAndSelf()->pluck('id')->toArray()
+                );
+            })
+            ->when($withExcepts, function (Builder $query) use ($withExcepts) {
+                $query->withTrashed()->whereNull('deleted_at')->orWhereIn('id', $withExcepts);
+            })->get();
+
+        return $categories->map(function (DocumentationCategory $documentationCategory) use ($defaultLanguage) {
+                return [
+                    'id'    => $documentationCategory->id,
+                    'title' => $documentationCategory->content?->title ?? $documentationCategory->slug,
+                ];
+            })
+            ->pluck('title', 'id')
+            ->toArray();
+    }
+}

app/application/app/Repositories/DocumentationRepository.php

@@ -0,0 +1,63 @@
+<?php declare(strict_types=1);
+
+namespace App\Repositories;
+
+use App\Dto\Builder\Documentation as DocumentationBuilderDto;
+use App\Contracts\Search;
+use App\Models\Documentation;
+use App\Models\ProjectLanguage;
+use App\Services\Documentation\BuilderCommand;
+use App\Services\Search\CreateSearchInstanceCommand;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Support\Str;
+
+final readonly class DocumentationRepository
+{
+    public function __construct(
+        private CreateSearchInstanceCommand $createSearchInstanceCommand,
+        private BuilderCommand $builderCommand
+    ) { }
+
+    public function getDocumentations(int $versionId, DocumentationBuilderDto $documentationBuilderDto, array $with = []): Search
+    {
+        $query = $this->builderCommand->execute(
+            query: Documentation::query()->where('version_id', $versionId)->with($with),
+            documentationBuilderDto: $documentationBuilderDto
+        );
+
+        return $this->createSearchInstanceCommand->execute($query);
+    }
+
+    public function getDocumentationById(int $id): ?Documentation
+    {
+        return Documentation::query()->where('id', $id)->first();
+    }
+
+    public function getDocumentationBySlugWithContent(string $slug, int $versionId, ProjectLanguage $language): ?Documentation
+    {
+        $with = [
+            'content' => function (HasOne $hasOne) use ($language) {
+                $hasOne->where('language_id', $language->id);
+            }
+        ];
+
+        return Documentation::query()
+            ->where('version_id', $versionId)
+            ->where('slug', $slug)
+            ->with($with)
+            ->first();
+    }
+
+    public function isExistsSlug(int $versionId, string $slug, ?int $exceptId = null): bool
+    {
+        return Documentation::query()
+            ->where('version_id', $versionId)
+            ->where('slug', Str::lower($slug))
+            ->when($exceptId, function (Builder $query, int $exceptId) {
+                $query->where('id', '!=', $exceptId);
+            })
+            ->withTrashed()
+            ->exists();
+    }
+}

app/application/app/Repositories/DocumentationVersionRepository.php

@@ -0,0 +1,51 @@
+<?php declare(strict_types=1);
+
+namespace App\Repositories;
+
+use App\Contracts\Search;
+use App\Models\DocumentationVersion;
+use App\Services\DocumentationVersion\BuilderCommand;
+use App\Services\Search\CreateSearchInstanceCommand;
+use App\Dto\Builder\DocumentationVersion as DocumentationVersionBuilderDto;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Str;
+
+final readonly class DocumentationVersionRepository
+{
+    public function __construct(
+        private CreateSearchInstanceCommand $createSearchInstanceCommand,
+        private BuilderCommand $builderCommand
+    ) { }
+
+    public function getVersions(int $projectId, DocumentationVersionBuilderDto $documentationVersionBuilderDto, array $with = []): Search
+    {
+        $query = $this->builderCommand->execute(
+            query: DocumentationVersion::query()->where('project_id', $projectId)->with($with),
+            documentationVersionBuilderDto: $documentationVersionBuilderDto
+        );
+
+        return $this->createSearchInstanceCommand->execute($query);
+    }
+
+    public function getVersionById(int $id): ?DocumentationVersion
+    {
+        return DocumentationVersion::query()->where('id', $id)->first();
+    }
+
+    public function getVersionByCode(string $code): ?DocumentationVersion
+    {
+        return DocumentationVersion::query()->where('code', $code)->first();
+    }
+
+    public function isExistsSlug(int $projectId, string $slug, ?int $exceptId = null): bool
+    {
+        return DocumentationVersion::query()
+            ->where('project_id', $projectId)
+            ->where('slug', Str::lower($slug))
+            ->when($exceptId, function (Builder $query, int $exceptId) {
+                $query->where('id', '!=', $exceptId);
+            })
+            ->withTrashed()
+            ->exists();
+    }
+}

app/application/app/ServiceResults/Site/DocumentationService/DefaultVersion.php

@@ -0,0 +1,17 @@
+<?php declare(strict_types=1);
+
+namespace App\ServiceResults\Site\DocumentationService;
+use App\Models\DocumentationVersion;
+use App\ServiceResults\ServiceResult;
+
+final class DefaultVersion extends ServiceResult
+{
+    public function __construct(
+        private readonly DocumentationVersion $version,
+    ) { }
+
+    public function getVersion(): DocumentationVersion
+    {
+        return $this->version;
+    }
+}

app/application/app/Services/Admin/Project/DocumentationCategoryService.php

@@ -0,0 +1,257 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\Admin\Project;
+
+use App\Dto\QuerySettingsDto;
+use App\Dto\Builder\DocumentationCategory as DocumentationCategoryBuilderDto;
+use App\Dto\Service\Admin\Project\DocumentationCategory\StoreUpdate;
+use App\Exceptions\Services\DocumentationCategory\ParentException;
+use App\Exceptions\Services\ServiceException;
+use App\Models\DocumentationCategory;
+use App\Models\DocumentationCategoryContent;
+use App\Models\ProjectLanguage;
+use App\Models\User;
+use App\Repositories\DocumentationCategoryRepository;
+use App\Repositories\DocumentationVersionRepository;
+use App\ServiceResults\ServiceResultArray;
+use App\ServiceResults\ServiceResultError;
+use App\ServiceResults\ServiceResultSuccess;
+use App\ServiceResults\StoreUpdateResult;
+use App\Services\DocumentationCategory\DocumentationCategoryCommandHandler;
+use App\Services\DocumentationCategoryContent\ModelSyncCommand;
+use App\Services\Service;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Support\Facades\DB;
+
+final class DocumentationCategoryService extends Service
+{
+    public function __construct(
+        private readonly DocumentationVersionRepository      $documentationVersionRepository,
+        private readonly DocumentationCategoryRepository     $documentationCategoryRepository,
+        private readonly DocumentationCategoryCommandHandler $categoryCommandHandler,
+        private readonly ModelSyncCommand                    $contentSaveCommand,
+    ) { }
+
+    public function index(int $projectId, int $versionId, DocumentationCategoryBuilderDto $documentationCategoryBuilderDto, QuerySettingsDto $querySettingsDto, User $user): ServiceResultError | ServiceResultArray
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('viewAny', DocumentationCategory::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $defaultLanguage = $project->languages()->where('is_default', 1)->first();
+        $with = [
+            'content' => function (HasOne $hasOne) use ($defaultLanguage) {
+                /** @var ?ProjectLanguage $defaultLanguage */
+                $hasOne->when($defaultLanguage, function (Builder $query, ProjectLanguage $defaultLanguage) {
+                    $query->where('language_id', $defaultLanguage->id);
+                });
+            }
+        ];
+        $with = array_merge($with, $querySettingsDto->getQueryWith());
+
+        $categories = $this->documentationCategoryRepository->getCategories(
+            $version->id,
+            $documentationCategoryBuilderDto,
+            $with
+        )->pagination(
+            $querySettingsDto->getLimit(),
+            $querySettingsDto->getPage()
+        );
+
+        return $this->result([
+            'version' => $version,
+            'project' => $project,
+            'categories' => $categories,
+        ]);
+    }
+
+    public function create(int $projectId, int $versionId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('create', DocumentationCategory::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $defaultLanguage = $project->languages->where('is_default', 1)->first();
+        return $this->result([
+            'version'  => $version,
+            'project'  => $project,
+            'category' => new DocumentationCategory(),
+            'categories' => $this->documentationCategoryRepository->getForSelect($defaultLanguage),
+        ]);
+    }
+
+    public function edit(int $projectId, int $versionId, int $categoryId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $category = $this->documentationCategoryRepository->getCategoryById($categoryId);
+        if (\is_null($category)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('view', $category)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $withCategories = [];
+        if ($category->parent_id) {
+            $withCategories[] = $category->parent_id;
+        }
+        $defaultLanguage = $project->languages->where('is_default', 1)->first();
+        return $this->result([
+            'version'  => $version,
+            'project'  => $project,
+            'category' => $category,
+            'categories' => $this->documentationCategoryRepository->getForSelect($defaultLanguage, $category, $withCategories),
+        ]);
+    }
+
+    public function store(int $projectId, int $versionId, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
+    {
+        if ($user->cannot('create', DocumentationCategory::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        try {
+            $category = DB::transaction(function () use ($data, $version, $user, $versionId, $project) {
+                if ($this->documentationCategoryRepository->isExistsSlug($versionId, $data->getSlug()) !== false) {
+                    $error = $this->errValidate(
+                        __('validation.unique', ['attribute' => __('validation.attributes.slug')]),
+                        ['slug' => __('validation.unique', ['attribute' => __('validation.attributes.slug')])]
+                    );
+                    throw new ServiceException($error);
+                }
+
+                $dataCategory = $this->getDataCategory($data);
+                $category = $this->categoryCommandHandler->handleStore($version, $dataCategory);
+                $this->contentSaveCommand->execute($project, $category, $data->getContents());
+
+                return $category;
+            });
+        } catch (ServiceException $e) {
+            return $e->getServiceResultError();
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->resultStoreUpdateModel($category, __('Category successfully created'));
+    }
+
+    public function update(int $projectId, int $versionId, int $categoryId, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $category = $this->documentationCategoryRepository->getCategoryById($categoryId);
+        if (\is_null($category)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('view', $category)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        if ($data->getParentId() === $category->id) {
+            return $this->errValidate(
+                __('validation.parent', ['attribute' => __('validation.attributes.parent_id')]),
+                ['parent_id' => __('validation.parent', ['attribute' => __('validation.attributes.parent_id')])]
+            );
+        }
+
+        try {
+            $category = DB::transaction(function () use ($data, $category, $versionId, $project) {
+                if ($this->documentationCategoryRepository->isExistsSlug($versionId, $data->getSlug(), $category->id) !== false) {
+                    $error = $this->errValidate(
+                        __('validation.unique', ['attribute' => __('validation.attributes.slug')]),
+                        ['slug' => __('validation.unique', ['attribute' => __('validation.attributes.slug')])]
+                    );
+                    throw new ServiceException($error);
+                }
+
+                $dataCategory = $this->getDataCategory($data);
+                $category = $this->categoryCommandHandler->handleUpdate($category, $dataCategory);
+                $this->contentSaveCommand->execute($project, $category, $data->getContents());
+
+                return $category;
+            });
+        } catch (ServiceException $e) {
+            return $e->getServiceResultError();
+        } catch (ParentException $e) {
+            return $this->errValidate(
+                __('validation.parent_cycle_detected', ['attribute' => __('validation.attributes.parent_id')]),
+                ['parent_id' => __('validation.parent_cycle_detected', ['attribute' => __('validation.attributes.parent_id')])]
+            );
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->resultStoreUpdateModel($category, __('Category updated successfully'));
+    }
+
+    public function destroy(int $projectId, int $versionId, int $categoryId, User $user): ServiceResultError|ServiceResultSuccess
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $category = $this->documentationCategoryRepository->getCategoryById($categoryId);
+        if (\is_null($category)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('delete', $category)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        try {
+            DB::transaction(function () use ($category) {
+                $this->categoryCommandHandler->handleDestroy($category);
+            });
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->ok(__('Category successfully deleted'));
+    }
+
+    private function getDataCategory(StoreUpdate $data): array
+    {
+        return [
+            'slug'      => $data->getSlug(),
+            'is_public' => $data->isPublic(),
+            'sort'      => $data->getSort(),
+            'parent_id' => $data->getParentId(),
+        ];
+    }
+}

app/application/app/Services/Admin/Project/DocumentationService.php

@@ -0,0 +1,239 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\Admin\Project;
+
+use App\Dto\Builder\Documentation as DocumentationBuilderDto;
+use App\Dto\QuerySettingsDto;
+use App\Dto\Service\Admin\Project\Documentation\StoreUpdate;
+use App\Models\Documentation;
+use App\Models\ProjectLanguage;
+use App\Models\User;
+use App\Repositories\DocumentationCategoryRepository;
+use App\Repositories\DocumentationRepository;
+use App\Repositories\DocumentationVersionRepository;
+use App\Repositories\ProjectRepository;
+use App\ServiceResults\ServiceResultArray;
+use App\ServiceResults\ServiceResultError;
+use App\ServiceResults\ServiceResultSuccess;
+use App\ServiceResults\StoreUpdateResult;
+use App\Services\Documentation\DocumentationCommandHandler;
+use App\Services\DocumentationContent\ModelSyncCommand;
+use App\Services\Service;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Support\Facades\DB;
+
+final class DocumentationService extends Service
+{
+    public function __construct(
+        private readonly DocumentationVersionRepository  $documentationVersionRepository,
+        private readonly DocumentationCategoryRepository $documentationCategoryRepository,
+        private readonly DocumentationRepository         $documentationRepository,
+        private readonly DocumentationCommandHandler     $documentationCommandHandler,
+        private readonly ModelSyncCommand                $contentSaveCommand,
+    ) { }
+
+    public function index(int $projectId, int $versionId, DocumentationBuilderDto $documentationBuilderDto, QuerySettingsDto $querySettingsDto, User $user): ServiceResultError | ServiceResultArray
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('viewAny', Documentation::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $defaultLanguage = $project->languages()->where('is_default', 1)->first();
+        $with = [
+            'content' => function (HasOne $hasOne) use ($defaultLanguage) {
+                /** @var ?ProjectLanguage $defaultLanguage */
+                $hasOne->when($defaultLanguage, function (Builder $query, ProjectLanguage $defaultLanguage) {
+                    $query->where('language_id', $defaultLanguage->id);
+                });
+            }
+        ];
+        $with = array_merge($with, $querySettingsDto->getQueryWith());
+
+        $documentations = $this->documentationRepository->getDocumentations(
+            $version->id,
+            $documentationBuilderDto,
+            $with
+        )->pagination(
+            $querySettingsDto->getLimit(),
+            $querySettingsDto->getPage()
+        );
+
+        return $this->result([
+            'version' => $version,
+            'project' => $project,
+            'documentations' => $documentations,
+        ]);
+    }
+
+    public function create(int $projectId, int $versionId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('create', Documentation::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $defaultLanguage = $project->languages->where('is_default', 1)->first();
+        return $this->result([
+            'version' => $version,
+            'project' => $project,
+            'documentation' => new Documentation(),
+            'categories' => $this->documentationCategoryRepository->getForSelect($defaultLanguage),
+        ]);
+    }
+
+    public function edit(int $projectId, int $versionId, int $documentationId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $documentation = $this->documentationRepository->getDocumentationById($documentationId);
+        if (\is_null($documentation)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('view', $documentation)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $withCategories = [];
+        if ($documentation->category_id) {
+            $withCategories[] = $documentation->category_id;
+        }
+        $defaultLanguage = $project->languages->where('is_default', 1)->first();
+        return $this->result([
+            'version' => $version,
+            'project' => $project,
+            'documentation' => $documentation,
+            'categories' => $this->documentationCategoryRepository->getForSelect($defaultLanguage, null, $withCategories),
+        ]);
+    }
+
+    public function store(int $projectId, int $versionId, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
+    {
+        if ($user->cannot('create', Documentation::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($this->documentationRepository->isExistsSlug($versionId, $data->getSlug()) !== false) {
+            return $this->errValidate(
+                __('validation.unique', ['attribute' => __('validation.attributes.slug')]),
+                ['slug' => __('validation.unique', ['attribute' => __('validation.attributes.slug')])]
+            );
+        }
+
+        try {
+            $documentation = DB::transaction(function () use ($data, $version, $user, $project) {
+                $dataDocumentation = $this->getDataDocumentation($data);
+                $documentation = $this->documentationCommandHandler->handleStore($version, $dataDocumentation);
+                $this->contentSaveCommand->execute($project, $documentation, $data->getContents());
+
+                return $documentation;
+            });
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->resultStoreUpdateModel($documentation, __('Documentation created successfully'));
+    }
+
+    public function update(int $projectId, int $versionId, int $documentationId, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $documentation = $this->documentationRepository->getDocumentationById($documentationId);
+        if (\is_null($documentation)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('view', $documentation)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        if ($this->documentationRepository->isExistsSlug($versionId, $data->getSlug(), $documentation->id) !== false) {
+            return $this->errValidate(
+                __('validation.unique', ['attribute' => __('validation.attributes.slug')]),
+                ['slug' => __('validation.unique', ['attribute' => __('validation.attributes.slug')])]
+            );
+        }
+
+        try {
+            $documentation = DB::transaction(function () use ($data, $documentation, $project) {
+                $dataDocumentation = $this->getDataDocumentation($data);
+                $documentation = $this->documentationCommandHandler->handleUpdate($documentation, $dataDocumentation);
+                $this->contentSaveCommand->execute($project, $documentation, $data->getContents());
+
+                return $documentation;
+            });
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->resultStoreUpdateModel($documentation, __('Documentation updated successfully'));
+    }
+
+    public function destroy(int $projectId, int $versionId, int $documentationId, User $user): ServiceResultError|ServiceResultSuccess
+    {
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        $project = $version?->project;
+        if (\is_null($version) || $project?->id !== $projectId) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $documentation = $this->documentationRepository->getDocumentationById($documentationId);
+        if (\is_null($documentation)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('delete', $documentation)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        try {
+            DB::transaction(function () use ($documentation) {
+                $this->documentationCommandHandler->handleDestroy($documentation);
+            });
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->ok(__('Documentation successfully removed'));
+    }
+
+    private function getDataDocumentation(StoreUpdate $data): array
+    {
+        return [
+            'slug'        => $data->getSlug(),
+            'is_public'   => $data->isPublic(),
+            'sort'        => $data->getSort(),
+            'category_id' => $data->getCategoryId(),
+        ];
+    }
+}

app/application/app/Services/Admin/Project/DocumentationVersionService.php

@@ -0,0 +1,228 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\Admin\Project;
+
+use App\Dto\QuerySettingsDto;
+use App\Dto\Builder\DocumentationVersion as DocumentationVersionBuilderDto;
+use App\Dto\Service\Admin\Project\DocumentationVersion\StoreUpdate;
+use App\Enums\CacheTag;
+use App\Enums\DocumentationVersionStatus;
+use App\Models\DocumentationVersion;
+use App\Models\User;
+use App\Repositories\DocumentationVersionRepository;
+use App\Repositories\ProjectRepository;
+use App\ServiceResults\ServiceResultArray;
+use App\ServiceResults\ServiceResultError;
+use App\ServiceResults\ServiceResultSuccess;
+use App\ServiceResults\StoreUpdateResult;
+use App\Services\ClearCacheCommandHandler;
+use App\Services\DocumentationVersion\DocumentationVersionCommandHandler;
+use App\Services\Service;
+use Illuminate\Support\Facades\DB;
+
+final class DocumentationVersionService extends Service
+{
+    public function __construct(
+        private readonly ProjectRepository $projectRepository,
+        private readonly DocumentationVersionRepository $documentationVersionRepository,
+        private readonly DocumentationVersionCommandHandler $documentationVersionCommandHandler,
+        private readonly ClearCacheCommandHandler $clearCacheCommandHandler,
+    ) { }
+
+    public function index(int $projectId, DocumentationVersionBuilderDto $documentationVersionBuilderDto, QuerySettingsDto $querySettingsDto, User $user): ServiceResultError | ServiceResultArray
+    {
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('viewAny', DocumentationVersion::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $versions = $this->documentationVersionRepository->getVersions(
+            $project->id,
+            $documentationVersionBuilderDto,
+            $querySettingsDto->getQueryWith()
+        )->pagination(
+            $querySettingsDto->getLimit(),
+            $querySettingsDto->getPage()
+        );
+
+        return $this->result([
+            'versions' => $versions,
+            'project'  => $project,
+        ]);
+    }
+
+    public function show(int $projectId, int $versionId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        if (\is_null($version)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('view', $version)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        return $this->result([
+            'version'  => $version,
+            'project'  => $project,
+        ]);
+    }
+
+    public function create(int $projectId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('create', DocumentationVersion::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        return $this->result([
+            'version'  => new DocumentationVersion(),
+            'statuses' => DocumentationVersionStatus::toCollection()->pluck( 'title', 'value')->toArray(),
+            'project'  => $project,
+        ]);
+    }
+
+    public function edit(int $projectId, int $versionId, User $user): ServiceResultError | ServiceResultArray
+    {
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        if (\is_null($version)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('view', $version)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        return $this->result([
+            'version'  => $version,
+            'statuses' => DocumentationVersionStatus::toCollection()->pluck( 'title', 'value')->toArray(),
+            'project'  => $project,
+        ]);
+    }
+
+    public function store(int $projectId, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
+    {
+        if ($user->cannot('create', DocumentationVersion::class)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($this->documentationVersionRepository->isExistsSlug($projectId, $data->getSlug()) !== false) {
+            return $this->errValidate(
+                __('validation.unique', ['attribute' => __('validation.attributes.slug')]),
+                ['slug' => __('validation.unique', ['attribute' => __('validation.attributes.slug')])]
+            );
+        }
+
+        try {
+            $version = DB::transaction(function () use ($data, $project, $user) {
+                $dataVersion = $this->getDataVersion($data);
+                return $this->documentationVersionCommandHandler->handleStore($project, $dataVersion);
+            });
+            $this->clearCacheCommandHandler->byTag(CacheTag::DocumantationVersion);
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->resultStoreUpdateModel($version, __('Documentation version created successfully'));
+    }
+
+    public function update(int $projectId, int $versionId, StoreUpdate $data, User $user): ServiceResultError | StoreUpdateResult
+    {
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        if (\is_null($version)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('update', $version)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        if ($this->documentationVersionRepository->isExistsSlug($projectId, $data->getSlug(), $version->id) !== false) {
+            return $this->errValidate(
+                __('validation.unique', ['attribute' => __('validation.attributes.slug')]),
+                ['slug' => __('validation.unique', ['attribute' => __('validation.attributes.slug')])]
+            );
+        }
+
+        try {
+            $version = DB::transaction(function () use ($data, $version) {
+                $dataVersion = $this->getDataVersion($data);
+                return $this->documentationVersionCommandHandler->handleUpdate($version, $dataVersion);
+            });
+            $this->clearCacheCommandHandler->byTag(CacheTag::DocumantationVersion);
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->resultStoreUpdateModel($version, __('Documentation version updated successfully'));
+    }
+
+    public function destroy(int $projectId, int $versionId, User $user): ServiceResultError|ServiceResultSuccess
+    {
+        $project = $this->projectRepository->getProjectById($projectId);
+        if (\is_null($project)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        $version = $this->documentationVersionRepository->getVersionById($versionId);
+        if (\is_null($version)) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        if ($user->cannot('delete', $version)) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        try {
+            DB::transaction(function () use ($version) {
+                $this->documentationVersionCommandHandler->handleDestroy($version);
+            });
+            $this->clearCacheCommandHandler->byTag(CacheTag::DocumantationVersion);
+        } catch (\Throwable $e) {
+            report($e);
+            return $this->errService(__('Server Error'));
+        }
+
+        return $this->ok(__('Documentation version successfully removed'));
+    }
+
+    private function getDataVersion(StoreUpdate $data): array
+    {
+        return [
+            'title'     => $data->getTitle(),
+            'slug'      => $data->getSlug(),
+            'is_public' => $data->isPublic(),
+            'status'    => $data->getStatus(),
+        ];
+    }
+}

app/application/app/Services/Documentation/BuilderCommand.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\Documentation;
+
+use App\Dto\Builder\Documentation as DocumentationBuilderDto;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\Relation;
+
+final readonly class BuilderCommand
+{
+    public function execute(Relation | Builder $query, DocumentationBuilderDto $documentationBuilderDto): Relation | Builder
+    {
+        return $query
+            ->when($documentationBuilderDto->isPublic(), function (Builder $query) use ($documentationBuilderDto) {
+                $query->where('is_public', $documentationBuilderDto->isPublic());
+            })
+            ->when($documentationBuilderDto->getCategoryId(), function (Builder $query) use ($documentationBuilderDto) {
+                $query->where('category_id', $documentationBuilderDto->getCategoryId()->getCategoryId());
+            });
+    }
+}

app/application/app/Services/Documentation/DocumentationCommandHandler.php

@@ -0,0 +1,36 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\Documentation;
+
+use App\Models\Documentation;
+use App\Models\DocumentationVersion;
+use Illuminate\Support\Str;
+
+final readonly class DocumentationCommandHandler
+{
+    public function handleStore(DocumentationVersion $version, array $data): Documentation
+    {
+        $data['slug'] = Str::lower($data['slug']);
+        return $version->documentations()->create($data);
+    }
+
+    public function handleUpdate(Documentation $documentation, array $data): Documentation
+    {
+        if (isset($data['slug'])) {
+            $data['slug'] = Str::lower($data['slug']);
+        }
+
+        $documentation->update($data);
+        $documentation->touch();
+
+        return $documentation;
+    }
+
+    public function handleDestroy(Documentation $documentation): void
+    {
+        $documentation->update([
+            'slug' => $documentation->slug . '#delete:' . $documentation->id,
+        ]);
+        $documentation->delete();
+    }
+}

app/application/app/Services/DocumentationCategory/BuilderCommand.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\DocumentationCategory;
+
+use App\Dto\Builder\DocumentationCategory as DocumentationCategoryBuilderDto;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\Relation;
+
+final readonly class BuilderCommand
+{
+    public function execute(Relation | Builder $query, DocumentationCategoryBuilderDto $documentationCategoryBuilderDto): Relation | Builder
+    {
+        return $query
+            ->when($documentationCategoryBuilderDto->isPublic(), function (Builder $query) use ($documentationCategoryBuilderDto) {
+                $query->where('is_public', $documentationCategoryBuilderDto->isPublic());
+            })
+            ->when($documentationCategoryBuilderDto->getParentId(), function (Builder $query) use ($documentationCategoryBuilderDto) {
+                $query->where('parent_id', $documentationCategoryBuilderDto->getParentId()->getCategoryId());
+            });
+    }
+}

app/application/app/Services/DocumentationCategory/DocumentationCategoryCommandHandler.php

@@ -0,0 +1,44 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\DocumentationCategory;
+
+use App\Exceptions\Services\DocumentationCategory\ParentException;
+use App\Models\DocumentationCategory;
+use App\Models\DocumentationVersion;
+use Illuminate\Support\Str;
+
+final readonly class DocumentationCategoryCommandHandler
+{
+    public function handleStore(DocumentationVersion $version, array $data): DocumentationCategory
+    {
+        $data['slug'] = Str::lower($data['slug']);
+        return $version->categories()->create($data);
+    }
+
+    public function handleUpdate(DocumentationCategory $category, array $data): DocumentationCategory
+    {
+        if (!empty($data['parent_id'])) {
+            $category->parent_id = $data['parent_id'];
+            if ($category->ancestors()->withTrashed()->where('id', $category->id)->exists()) {
+                throw new ParentException('Category ID occurs in the parent chain (category: ' . $category->id . ', parent_id: ' . $category->parent_id . ').');
+            }
+        }
+
+        if (isset($data['slug'])) {
+            $data['slug'] = Str::lower($data['slug']);
+        }
+
+        $category->update($data);
+        $category->touch();
+
+        return $category;
+    }
+
+    public function handleDestroy(DocumentationCategory $category): void
+    {
+        $category->update([
+            'slug' => $category->slug . '#delete:' . $category->id,
+        ]);
+        $category->delete();
+    }
+}

app/application/app/Services/DocumentationCategoryContent/ModelSyncCommand.php

@@ -0,0 +1,46 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\DocumentationCategoryContent;
+
+use App\Dto\Service\Admin\Project\DocumentationCategoryContent\Content;
+use App\Dto\Service\Admin\Project\DocumentationCategoryContent\Contents;
+use App\Exceptions\Services\DocumentationCategoryContent\ContentSaveException;
+use App\Models\DocumentationCategory;
+use App\Models\Project;
+
+final readonly class ModelSyncCommand
+{
+    public function execute(Project $project, DocumentationCategory $category, Contents $contents): void
+    {
+        $languages = $project->languages;
+        $categoryContents = $category->contents;
+
+        $newContents = [];
+        foreach ($contents->getContents() as $content)   {
+            /** @var Content $content */
+            $language = $languages->firstWhere('id', $content->getLanguageId());
+            if (!$language) {
+                throw new ContentSaveException('Language not found: ' . $content->getLanguageId());
+            }
+
+            $model = $categoryContents->firstWhere('language_id', $language->id);
+            $data  = $this->getData($content);
+            if (\is_null($model)) {
+                $newContents[] = array_merge(['language_id' => $content->getLanguageId()], $data);
+                continue;
+            }
+            $model->update($data);
+        }
+
+        if (!empty($newContents)) {
+            $category->contents()->createMany($newContents);
+        }
+    }
+
+    private function getData(Content $content): array
+    {
+        return [
+            'title' => $content->getTitle(),
+        ];
+    }
+}

app/application/app/Services/DocumentationContent/ModelSyncCommand.php

@@ -0,0 +1,47 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\DocumentationContent;
+
+use App\Dto\Service\Admin\Project\DocumentationContent\Content;
+use App\Dto\Service\Admin\Project\DocumentationContent\Contents;
+use App\Exceptions\Services\DocumentationContent\ContentSaveException;
+use App\Models\Documentation;
+use App\Models\Project;
+
+final readonly class ModelSyncCommand
+{
+    public function execute(Project $project, Documentation $documentation, Contents $contents): void
+    {
+        $languages = $project->languages;
+        $documentationContents = $documentation->contents;
+
+        $newContents = [];
+        foreach ($contents->getContents() as $content)   {
+            /** @var Content $content */
+            $language = $languages->firstWhere('id', $content->getLanguageId());
+            if (!$language) {
+                throw new ContentSaveException('Language not found: ' . $content->getLanguageId());
+            }
+
+            $model = $documentationContents->firstWhere('language_id', $language->id);
+            $data  = $this->getData($content);
+            if (\is_null($model)) {
+                $newContents[] = array_merge(['language_id' => $content->getLanguageId()], $data);
+                continue;
+            }
+            $model->update($data);
+        }
+
+        if (!empty($newContents)) {
+            $documentation->contents()->createMany($newContents);
+        }
+    }
+
+    private function getData(Content $content): array
+    {
+        return [
+            'title'   => $content->getTitle(),
+            'content' => $content->getContent(),
+        ];
+    }
+}

app/application/app/Services/DocumentationVersion/BuilderCommand.php

@@ -0,0 +1,19 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\DocumentationVersion;
+
+use App\Dto\Builder\DocumentationVersion as DocumentationVersionBuilderDto;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\Relation;
+
+final readonly class BuilderCommand
+{
+    public function execute(Relation | Builder $query, DocumentationVersionBuilderDto $documentationVersionBuilderDto): Relation | Builder
+    {
+        if ($documentationVersionBuilderDto->isPublic() !== null) {
+            $query->where('is_public', $documentationVersionBuilderDto->isPublic());
+        }
+
+        return $query;
+    }
+}

app/application/app/Services/DocumentationVersion/DocumentationVersionCommandHandler.php

@@ -0,0 +1,37 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\DocumentationVersion;
+
+use App\Models\DocumentationVersion;
+use App\Models\Project;
+use Illuminate\Support\Str;
+
+final readonly class DocumentationVersionCommandHandler
+{
+    public function handleStore(Project $project, array $data): DocumentationVersion
+    {
+        $data['slug'] = Str::lower($data['slug']);
+
+        return $project->documentationVersions()->create($data);
+    }
+
+    public function handleUpdate(DocumentationVersion $version, array $data): DocumentationVersion
+    {
+        if (isset($data['slug'])) {
+            $data['slug'] = Str::lower($data['slug']);
+        }
+
+        $version->update($data);
+        $version->touch();
+
+        return $version;
+    }
+
+    public function handleDestroy(DocumentationVersion $version): void
+    {
+        $version->update([
+            'slug' => $version->slug . '#delete:' . $version->id,
+        ]);
+        $version->delete();
+    }
+}

app/application/app/Services/Site/DocumentationService.php

@@ -0,0 +1,151 @@
+<?php declare(strict_types=1);
+
+namespace App\Services\Site;
+
+use App\Dto\Service\Site\Documentation;
+use App\Enums\CacheTag;
+use App\Enums\DocumentationVersionStatus;
+use App\Models\DocumentationCategory;
+use App\Models\Documentation as ModelDocumentation;
+use App\Models\DocumentationVersion;
+use App\Models\Project;
+use App\Models\User;
+use App\Repositories\DocumentationCategoryRepository;
+use App\Repositories\DocumentationRepository;
+use App\ServiceResults\ServiceResultArray;
+use App\ServiceResults\ServiceResultError;
+use App\ServiceResults\Site\DocumentationService\DefaultVersion;
+use app\ServiceResults\Site\PagePossibleWithoutTranslation;
+use App\Services\Service;
+use App\Dto\Builder\DocumentationCategory as DocumentationCategoryBuilderDto;
+use App\Dto\Builder\Documentation as DocumentationBuilderDto;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Support\Collection;
+
+final class DocumentationService extends Service
+{
+    public function __construct(
+        private readonly DocumentationCategoryRepository $documentationCategoryRepository,
+        private readonly DocumentationRepository         $documentationRepository
+    ) { }
+
+    public function defaultVersion(Project $project, ?User $user): ServiceResultError | DefaultVersion
+    {
+        $seconds = 3600;
+        $isPublic = null;
+        if ($user?->cannot('viewAny', DocumentationVersion::class)) {
+            $isPublic = 1;
+        }
+        $version = CacheTag::DocumantationVersion->getCache()
+            ->remember(self::class . $project->id . '_' . $isPublic ?? 0, $seconds, function () use ($project, $isPublic) {
+                $versions = $project->documentationVersions()
+                    ->when($isPublic, function (Builder $query) {
+                        $query->where('is_public', 1);
+                    })
+                    ->limit(10)
+                    ->get();
+                return $versions->firstWhere('status', DocumentationVersionStatus::CurrentVersion)
+                    ??
+                    $versions->first() ?? false;
+            });
+
+        if ($version === false) {
+            return $this->errNotFound(__('Not Found'));
+        }
+
+        return new DefaultVersion($version);
+    }
+
+    public function index(Documentation $documentation): ServiceResultError | ServiceResultArray
+    {
+        return $this->result(array_merge($documentation->toArray(), [
+            'categories'     => $this->getCategories($documentation, null),
+            'documentations' => $this->getDocumentations($documentation, null),
+        ]));
+    }
+
+    public function category(string $slug, Documentation $documentation): ServiceResultError | PagePossibleWithoutTranslation
+    {
+        $category = $this->documentationCategoryRepository->getCategoryBySlugWithContent($slug, $documentation->getVersion()->id, $documentation->getWebsiteTranslations()->getLanguage());
+        if (!$category) {
+            return $this->errNotFound(__('Not Found'));
+        }
+        if (
+            $category->is_public === false &&
+            ($documentation->getUser() === null || $documentation->getUser()->cannot('view', $category))
+        ) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $data = array_merge($documentation->toArray(), [
+            'category'       => $category,
+            'categories'     => $this->getCategories($documentation, $category->id),
+            'documentations' => $this->getDocumentations($documentation, $category->id),
+        ]);
+        return $this->resultSitePage($documentation->getProject(), $documentation->getWebsiteTranslations(), $data, \is_null($category->content?->title));
+    }
+
+    public function view(string $slug, Documentation $documentation): ServiceResultError | PagePossibleWithoutTranslation
+    {
+        $document = $this->documentationRepository->getDocumentationBySlugWithContent($slug, $documentation->getVersion()->id, $documentation->getWebsiteTranslations()->getLanguage());
+        if (!$document) {
+            return $this->errNotFound(__('Not Found'));
+        }
+        if (
+            $document->is_public === false &&
+            ($documentation->getUser() === null || $documentation->getUser()->cannot('view', $document))
+        ) {
+            return $this->errFobidden(__('Access is denied'));
+        }
+
+        $data = array_merge($documentation->toArray(), [
+            'documentation' => $document,
+        ]);
+        return $this->resultSitePage($documentation->getProject(), $documentation->getWebsiteTranslations(), $data, \is_null($document->content?->title));
+    }
+
+    private function getCategories(Documentation $documentation, ?int $parentId): Collection
+    {
+        $isPublic = null;
+        if ($documentation->getUser() === null || $documentation->getUser()->cannot('viewAny', DocumentationCategory::class)) {
+            $isPublic = true;
+        }
+        $builderDto = new DocumentationCategoryBuilderDto(
+            isPublic: $isPublic,
+            parentId: new DocumentationCategoryBuilderDto\Category($parentId),
+        );
+        $with = [
+            'content' => function (HasOne $hasOne) use ($documentation) {
+                $hasOne->where('language_id', $documentation->getWebsiteTranslations()->getLanguage()->id);
+            }
+        ];
+        return $this->documentationCategoryRepository->getCategories(
+            $documentation->getVersion()->id,
+            $builderDto,
+            $with
+        )->all();
+    }
+
+    private function getDocumentations(Documentation $documentation, ?int $categoryId): Collection
+    {
+        $isPublic = null;
+        if ($documentation->getUser() === null || $documentation->getUser()->cannot('viewAny', ModelDocumentation::class)) {
+            $isPublic = true;
+        }
+        $builderDto = new DocumentationBuilderDto(
+            isPublic: $isPublic,
+            categoryId: new DocumentationCategoryBuilderDto\Category($categoryId),
+        );
+        $with = [
+            'content' => function (HasOne $hasOne) use ($documentation) {
+                $hasOne->where('language_id', $documentation->getWebsiteTranslations()->getLanguage()->id);
+            }
+        ];
+        return $this->documentationRepository->getDocumentations(
+            $documentation->getVersion()->id,
+            $builderDto,
+            $with
+        )->all();
+    }
+}

app/application/app/View/Components/Site/ChooseVersion.php

@@ -0,0 +1,48 @@
+<?php declare(strict_types=1);
+
+namespace App\View\Components\Site;
+
+use App\Enums\CacheTag;
+use App\Models\DocumentationVersion;
+use App\Models\Project;
+use App\Models\User;
+use App\Services\WebsiteTranslations;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Str;
+use Illuminate\View\Component;
+use Illuminate\View\View;
+
+final class ChooseVersion extends Component
+{
+    public function __construct(
+        private readonly DocumentationVersion $version,
+        private readonly WebsiteTranslations  $websiteTranslations,
+        private readonly Project              $project,
+        private readonly ?User                $user,
+    ) { }
+
+    public function render(): View
+    {
+        $isPublic = null;
+        if (\is_null($this->user) || $this->user->cannot('viewAny', DocumentationVersion::class)) {
+            $isPublic = 1;
+        }
+
+        $seconds = 3600 * 12;
+        $versions = CacheTag::DocumantationVersion->getCache()
+            ->remember(self::class . $this->project->id . '-' . $isPublic ?? 0, $seconds, function () use ($isPublic) {
+                return $this->project->documentationVersions()
+                    ->when($isPublic, function (Builder $query) {
+                        $query->where('is_public', 1);
+                    })
+                    ->get();
+            });
+
+        return view('components.site.choose-version', [
+            'websiteTranslations' => $this->websiteTranslations,
+            'versions'            => $versions,
+            'version'             => $this->version,
+            'project'             => $this->project,
+        ]);
+    }
+}

app/application/app/View/Components/Site/DocumentationVersion.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types=1);
+
+namespace App\View\Components\Site;
+
+use App\Services\WebsiteTranslations;
+use Illuminate\View\Component;
+use Illuminate\View\View;
+
+final class DocumentationVersion extends Component
+{
+    public function __construct(
+        private readonly \App\Models\DocumentationVersion $version,
+        private readonly WebsiteTranslations              $websiteTranslations,
+    ) { }
+
+    public function render(): View
+    {
+        return view('components.site.documentation-version', [
+            'websiteTranslations' => $this->websiteTranslations,
+            'version'             => $this->version,
+        ]);
+    }
+}

app/application/app/View/Components/Volt/Forms/Checkbox.php

@@ -27,12 +27,12 @@ private function getTitle(): string
 
     private function getCheckboxValue(): string
     {
-        return (string) old($this->getRequestName(), $this->checkboxValue);
+        return (string) $this->checkboxValue;
     }
 
     private function getUserValue(): string
     {
-        return (string) $this->userValue;
+        return (string) old($this->getRequestName(), $this->userValue);
     }
 
     private function getNotCheckedValue(): ?string

app/application/app/View/Components/Volt/Forms/Input.php

@@ -13,6 +13,7 @@ public function __construct(
         private readonly string $type = 'text',
         private readonly ?string $value = '',
         private readonly ?string $example = null,
+        private readonly ?string $allowedCharacters = null,
     ) { }
 
     protected function getName(): string
@@ -40,6 +41,11 @@ private function getExample(): ?string
         return $this->example;
     }
 
+    public function getAllowedCharacters(): ?string
+    {
+        return $this->allowedCharacters;
+    }
+
     /**
      * @inheritDoc
      */
@@ -52,6 +58,7 @@ public function render(): View
             'type' => $this->getType(),
             'value' => $this->getValue(),
             'example' => $this->getExample(),
+            'allowedCharacters' => $this->getAllowedCharacters(),
         ]);
     }
 }

app/application/app/View/Components/Volt/Forms/Languages.php

@@ -19,7 +19,7 @@ protected function getName(): string
     private function getValue(): array
     {
         $value = old($this->getRequestName(), null);
-        if (\is_null($value)) {
+        if (\is_null($value) || !isset($value['items']) || !\is_array($value['items'])) {
             return $this->value;
         }
 

app/application/composer.json

@@ -9,7 +9,8 @@
         "intervention/image-laravel": "^1.2",
         "kor-elf/captcha-rule-for-laravel": "^1.0",
         "laravel/framework": "^11.0",
-        "laravel/tinker": "^2.9"
+        "laravel/tinker": "^2.9",
+        "staudenmeir/laravel-adjacency-list": "^1.0"
     },
     "require-dev": {
         "barryvdh/laravel-debugbar": "^3.13",

app/application/composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "5e3226c3090c81571c830e2c383433ab",
+    "content-hash": "f7873c3a33599ee1ce0bbce99af9db22",
     "packages": [
         {
             "name": "brick/math",
@@ -3381,6 +3381,174 @@
             ],
             "time": "2023-11-08T05:53:05+00:00"
         },
+        {
+            "name": "staudenmeir/eloquent-has-many-deep-contracts",
+            "version": "v1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/staudenmeir/eloquent-has-many-deep-contracts.git",
+                "reference": "bcbe1a921caad7201b324e297eddb696d4bd8647"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/staudenmeir/eloquent-has-many-deep-contracts/zipball/bcbe1a921caad7201b324e297eddb696d4bd8647",
+                "reference": "bcbe1a921caad7201b324e297eddb696d4bd8647",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/database": "^11.0",
+                "php": "^8.2"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Staudenmeir\\EloquentHasManyDeepContracts\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jonas Staudenmeir",
+                    "email": "mail@jonas-staudenmeir.de"
+                }
+            ],
+            "description": "Contracts for staudenmeir/eloquent-has-many-deep",
+            "support": {
+                "issues": "https://github.com/staudenmeir/eloquent-has-many-deep-contracts/issues",
+                "source": "https://github.com/staudenmeir/eloquent-has-many-deep-contracts/tree/v1.2"
+            },
+            "time": "2024-01-18T01:20:44+00:00"
+        },
+        {
+            "name": "staudenmeir/laravel-adjacency-list",
+            "version": "v1.22",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/staudenmeir/laravel-adjacency-list.git",
+                "reference": "0ec695e5d4094434f4a7adb956ebd23e228970ea"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/staudenmeir/laravel-adjacency-list/zipball/0ec695e5d4094434f4a7adb956ebd23e228970ea",
+                "reference": "0ec695e5d4094434f4a7adb956ebd23e228970ea",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/database": "^11.0",
+                "php": "^8.2",
+                "staudenmeir/eloquent-has-many-deep-contracts": "^1.2",
+                "staudenmeir/laravel-cte": "^1.11"
+            },
+            "require-dev": {
+                "barryvdh/laravel-ide-helper": "^3.0",
+                "larastan/larastan": "^2.0",
+                "mockery/mockery": "^1.5.1",
+                "orchestra/testbench": "^9.0",
+                "phpunit/phpunit": "^10.5",
+                "singlestoredb/singlestoredb-laravel": "^1.5.4",
+                "staudenmeir/eloquent-has-many-deep": "^1.20"
+            },
+            "suggest": {
+                "barryvdh/laravel-ide-helper": "Provide type hints for attributes and relations."
+            },
+            "type": "library",
+            "extra": {
+                "laravel": {
+                    "providers": [
+                        "Staudenmeir\\LaravelAdjacencyList\\IdeHelperServiceProvider"
+                    ]
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Staudenmeir\\LaravelAdjacencyList\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jonas Staudenmeir",
+                    "email": "mail@jonas-staudenmeir.de"
+                }
+            ],
+            "description": "Recursive Laravel Eloquent relationships with CTEs",
+            "support": {
+                "issues": "https://github.com/staudenmeir/laravel-adjacency-list/issues",
+                "source": "https://github.com/staudenmeir/laravel-adjacency-list/tree/v1.22"
+            },
+            "funding": [
+                {
+                    "url": "https://paypal.me/JonasStaudenmeir",
+                    "type": "custom"
+                }
+            ],
+            "time": "2024-04-19T12:11:45+00:00"
+        },
+        {
+            "name": "staudenmeir/laravel-cte",
+            "version": "v1.11",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/staudenmeir/laravel-cte.git",
+                "reference": "1e7063021febf9db7e47d8ea602f582b00d55da6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/staudenmeir/laravel-cte/zipball/1e7063021febf9db7e47d8ea602f582b00d55da6",
+                "reference": "1e7063021febf9db7e47d8ea602f582b00d55da6",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/database": "^11.0",
+                "php": "^8.2"
+            },
+            "require-dev": {
+                "orchestra/testbench": "^9.0",
+                "phpstan/phpstan": "^1.10",
+                "phpunit/phpunit": "^10.5"
+            },
+            "type": "library",
+            "extra": {
+                "laravel": {
+                    "providers": [
+                        "Staudenmeir\\LaravelCte\\DatabaseServiceProvider"
+                    ]
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Staudenmeir\\LaravelCte\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jonas Staudenmeir",
+                    "email": "mail@jonas-staudenmeir.de"
+                }
+            ],
+            "description": "Laravel queries with common table expressions",
+            "support": {
+                "issues": "https://github.com/staudenmeir/laravel-cte/issues",
+                "source": "https://github.com/staudenmeir/laravel-cte/tree/v1.11"
+            },
+            "funding": [
+                {
+                    "url": "https://paypal.me/JonasStaudenmeir",
+                    "type": "custom"
+                }
+            ],
+            "time": "2024-03-09T10:12:45+00:00"
+        },
         {
             "name": "symfony/clock",
             "version": "v7.0.5",

app/application/database/migrations/2024_04_30_114847_create_documentation.php

@@ -0,0 +1,124 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('documentation_versions', function (Blueprint $table) {
+            $table->id();
+            $table->string('title', 255);
+            $table->string('slug', 100);
+
+            $table->unsignedBigInteger('project_id')->index();
+            $table->foreign('project_id')->references('id')->on('projects');
+
+            $table->boolean('is_public')->default(0);
+            $table->unsignedInteger('status')->index();
+            $table->timestamps();
+            $table->softDeletes()->index();
+
+            $table->unique(['project_id', 'slug']);
+            $table->index(['is_public', 'deleted_at']);
+        });
+
+        Schema::create('documentation_categories', function (Blueprint $table) {
+            $table->id();
+            $table->string('slug');
+            $table->boolean('is_public')->default(0);
+            $table->integer('sort')->index();
+
+            $table->unsignedBigInteger('version_id')->index();
+            $table->foreign('version_id')->references('id')->on('documentation_versions');
+
+            $table->unsignedBigInteger('parent_id')->nullable()->index();
+            $table->foreign('parent_id')->references('id')->on('documentation_categories');
+
+            $table->timestamps();
+            $table->softDeletes()->index();
+
+            $table->index(['slug', 'version_id', 'deleted_at']);
+            $table->index(['slug', 'version_id', 'is_public', 'deleted_at'], 'slug_version_id_is_public_deleted_at_index');
+
+            $table->index(['parent_id', 'deleted_at']);
+            $table->index(['parent_id', 'is_public', 'deleted_at']);
+
+            $table->unique(['version_id', 'slug']);
+        });
+
+        Schema::create('documentation_category_content', function (Blueprint $table) {
+            $table->id();
+
+            $table->unsignedBigInteger('category_id')->index();
+            $table->foreign('category_id')->references('id')->on('documentation_categories');
+
+            $table->unsignedBigInteger('language_id')->index();
+            $table->foreign('language_id')->references('id')->on('project_languages');
+
+            $table->string('title', 255);
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index(['category_id', 'language_id', 'deleted_at'], 'category_language_deleted_index');
+        });
+
+        Schema::create('documentation', function (Blueprint $table) {
+            $table->id();
+            $table->string('slug');
+
+            $table->unsignedBigInteger('version_id')->index();
+            $table->foreign('version_id')->references('id')->on('documentation_versions');
+
+            $table->unsignedBigInteger('category_id')->nullable()->index();
+            $table->foreign('category_id')->references('id')->on('documentation_categories');
+
+            $table->boolean('is_public')->default(0)->index();
+            $table->integer('sort')->index();
+            $table->timestamps();
+            $table->softDeletes()->index();
+
+            $table->index(['slug', 'version_id', 'deleted_at']);
+            $table->index(['slug', 'version_id', 'is_public', 'deleted_at']);
+
+            $table->index(['category_id', 'deleted_at']);
+            $table->index(['category_id', 'is_public', 'deleted_at']);
+
+            $table->unique(['version_id', 'slug']);
+        });
+
+        Schema::create('documentation_content', function (Blueprint $table) {
+            $table->id();
+
+            $table->unsignedBigInteger('documentation_id')->index();
+            $table->foreign('documentation_id')->references('id')->on('documentation');
+
+            $table->unsignedBigInteger('language_id')->index();
+            $table->foreign('language_id')->references('id')->on('project_languages');
+
+            $table->string('title', 255);
+            $table->longText('content')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index(['documentation_id', 'language_id', 'deleted_at'], 'content_documentation_language_deleted_index');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('documentation_content');
+        Schema::dropIfExists('documentation');
+        Schema::dropIfExists('documentation_category_content');
+        Schema::dropIfExists('documentation_categories');
+        Schema::dropIfExists('documentation_versions');
+    }
+};

app/application/lang/en.json

@@ -256,5 +256,16 @@
     "The link has been deleted": "The link has been deleted",
     "Language not found": "Language not found",
     "Project not found": "Project not found",
-    "Translations successfully updated": "Translations successfully updated"
+    "Translations successfully updated": "Translations successfully updated",
+    "allowed characters:": "allowed characters:",
+    "Documentation version created successfully": "Documentation version created successfully",
+    "Documentation version updated successfully": "Documentation version updated successfully",
+    "Documentation version successfully removed": "Documentation version successfully removed",
+    "List": "List",
+    "Documentation created successfully": "Documentation created successfully",
+    "Documentation updated successfully": "Documentation updated successfully",
+    "Documentation successfully removed": "Documentation successfully removed",
+    "Category successfully created": "Category successfully created",
+    "Category updated successfully": "Category updated successfully",
+    "Category successfully deleted": "Category successfully deleted"
 }

app/application/lang/en/admin-sections.php

@@ -13,4 +13,7 @@
     'Links project' => 'Links from the project',
     'Translations' => 'Translations',
     'Feedback' => 'Feedback',
+    'Documentation version' => 'Documentation version',
+    'Documentation' => 'Documentation',
+    'Categories' => 'Categories',
 ];

app/application/lang/en/permissions.php

@@ -17,4 +17,6 @@
     'ProjectLink'    => 'Links from the project',
     'ProjectTranslation' => 'Translations',
     'ProjectFeedback'    => 'Feedback',
+    'Documentation'      => 'Documentation',
+    'DocumentationCategory' => 'Documentation category',
 ];

app/application/lang/en/site.php

@@ -16,4 +16,9 @@
         'email'   => 'email',
         'message' => 'message',
     ],
+    'Documentation' => 'Documentation',
+    'Documentation not created' => 'Documentation not created',
+    'Choose version' => 'Choose version',
+    'alert-status-not-supported' => 'WARNING! You are viewing the documentation for an older version.',
+    'alert-status-future' => 'WARNING! You\'re browsing the documentation for an upcoming version. The documentation and features of this release are subject to change.',
 ];

app/application/lang/en/validation.php

@@ -151,6 +151,8 @@
     'no_type'              => 'The :attribute can only use: :type.',
     'captcha'              => 'Failed to pass human verification.',
     'http_host'            => 'The :attribute must be a valid domain.',
+    'parent'               => 'A parent cannot refer to itself.',
+    'parent_cycle_detected' => 'Category ID occurs in the parent chain.',
     'attributes'           => [
         'address'                  => 'address',
         'affiliate_url'            => 'affiliate URL',
@@ -301,5 +303,9 @@
         'translations'             => 'translations',
         'translations.*.code'      => 'translations code',
         'translations.*.text'      => 'translations',
+        'parent_id'                => 'parent',
+        'content.*.title'          => 'title',
+        'content.*.content'        => 'content',
+        'category_id'              => 'category',
     ],
 ];

app/application/lang/en/version-status.php

@@ -0,0 +1,7 @@
+<?php
+return [
+    'NotSupported'   => 'Not Supported',
+    'Supported'      => 'Supported',
+    'CurrentVersion' => 'Current version',
+    'FutureVersion'  => 'Future version',
+];

app/application/lang/ru.json

@@ -256,5 +256,16 @@
     "The link has been deleted": "Ссылка удалена",
     "Language not found": "Язык не найден",
     "Project not found": "Проект не найден",
-    "Translations successfully updated": "Переводы успешно обновлены"
+    "Translations successfully updated": "Переводы успешно обновлены",
+    "allowed characters:": "разрешенные символы:",
+    "Documentation version created successfully": "Версия документации успешно создана",
+    "Documentation version updated successfully": "Версия документации успешно обновлена",
+    "Documentation version successfully removed": "Версия документации успешно удалена",
+    "List": "Список",
+    "Documentation created successfully": "Документация успешно создана",
+    "Documentation updated successfully": "Документация успешно обновлена",
+    "Documentation successfully removed": "Документация успешно удалена",
+    "Category successfully created": "Категория успешно создана",
+    "Category updated successfully": "Категория успешно обновлена",
+    "Category successfully deleted": "Категория успешно удалена"
 }

app/application/lang/ru/admin-sections.php

@@ -13,4 +13,7 @@
     'Links project' => 'Ссылки от проекта',
     'Translations' => 'Переводы',
     'Feedback' => 'Обратная связь',
+    'Documentation version' => 'Версия документации',
+    'Documentation' => 'Документация',
+    'Categories' => 'Категории',
 ];

app/application/lang/ru/permissions.php

@@ -17,4 +17,6 @@
     'ProjectLink'    => 'Ссылки от проекта',
     'ProjectTranslation' => 'Переводы',
     'ProjectFeedback'    => 'Обратная связь',
+    'Documentation'         => 'Документация',
+    'DocumentationCategory' => 'Категория документации',
 ];

app/application/lang/ru/site.php

@@ -16,4 +16,9 @@
         'email'   => 'email',
         'message' => 'сообщение',
     ],
+    'Documentation' => 'Документация',
+    'Documentation not created' => 'Документация не создана',
+    'Choose version' => 'Выберите версию',
+    'alert-status-not-supported' => 'ВНИМАНИЕ! Вы просматриваете документацию для старой версии.',
+    'alert-status-future' => 'ВНИМАНИЕ! Вы просматриваете документацию к будущей версии. Документация и функции этого выпуска могут быть изменены.',
 ];

app/application/lang/ru/validation.php

@@ -151,6 +151,8 @@
     'no_type'              => 'Значение поля :attribute может использовать только: :type.',
     'captcha'              => 'Не удалось пройти проверку человеком.',
     'http_host'            => 'Значение поля :attribute не является доменом или имеет некорректный формат.',
+    'parent'               => 'Родитель не может ссылаться на себя.',
+    'parent_cycle_detected' => 'ID категории встречается в родительской цепочке.',
     'attributes'           => [
         'address'                  => 'адрес',
         'affiliate_url'            => 'Партнёрская ссылка',
@@ -301,5 +303,9 @@
         'translations'             => 'переводы',
         'translations.*.code'      => 'код перевода',
         'translations.*.text'      => 'переводы',
+        'parent_id'                => 'родитель',
+        'content.*.title'          => 'заголовок',
+        'content.*.content'        => 'контент',
+        'category_id'              => 'категория',
     ],
 ];

app/application/lang/ru/version-status.php

@@ -0,0 +1,7 @@
+<?php
+return [
+    'NotSupported'   => 'Не поддерживается',
+    'Supported'      => 'Поддерживается',
+    'CurrentVersion' => 'Текущая версия',
+    'FutureVersion'  => 'Будущая версия',
+];

app/application/package-lock.json

@@ -13,6 +13,7 @@
                 "notyf": "^3.10.0",
                 "nouislider": "^15.2.0",
                 "onscreen": "^1.4.0",
+                "prismjs": "^1.29.0",
                 "sass": "^1.47.0",
                 "simplebar": "^5.3.4",
                 "smooth-scroll": "^16.1.3",
@@ -1766,6 +1767,14 @@
                 "node": "^10 || ^12 || >=14"
             }
         },
+        "node_modules/prismjs": {
+            "version": "1.29.0",
+            "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.29.0.tgz",
+            "integrity": "sha512-Kx/1w86q/epKcmte75LNrEoT+lX8pBpavuAbvJWRXar7Hz8jrtF+e3vY751p0R8H9HdArwaCTNDDzHg/ScJK1Q==",
+            "engines": {
+                "node": ">=6"
+            }
+        },
         "node_modules/proxy-from-env": {
             "version": "1.1.0",
             "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",

app/application/package.json

@@ -14,6 +14,7 @@
         "notyf": "^3.10.0",
         "nouislider": "^15.2.0",
         "onscreen": "^1.4.0",
+        "prismjs": "^1.29.0",
         "sass": "^1.47.0",
         "simplebar": "^5.3.4",
         "smooth-scroll": "^16.1.3",

app/application/resources/prism/app.js

@@ -0,0 +1,32 @@
+import Prism from 'prismjs';
+
+import "prismjs/components/prism-core.js";
+import "prismjs/components/prism-clike.js";
+import "prismjs/components/prism-markup.js";
+import "prismjs/components/prism-markup-templating.js"
+import "prismjs/components/prism-go.js";
+import "prismjs/components/prism-go-module.js";
+import "prismjs/components/prism-java.js";
+import "prismjs/components/prism-javascript.js";
+import "prismjs/components/prism-css.js";
+import "prismjs/components/prism-ruby.js";
+import "prismjs/components/prism-python.js";
+import "prismjs/components/prism-c.js";
+import "prismjs/components/prism-csharp.js";
+import "prismjs/components/prism-cpp.js";
+import "prismjs/components/prism-nginx.js";
+import "prismjs/components/prism-docker.js";
+import "prismjs/components/prism-diff.js";
+import "prismjs/components/prism-php.js";
+
+
+import "prismjs/plugins/toolbar/prism-toolbar.css";
+import "prismjs/plugins/toolbar/prism-toolbar.js";
+import "prismjs/plugins/copy-to-clipboard/prism-copy-to-clipboard.js";
+import "prismjs/plugins/line-numbers/prism-line-numbers.css";
+import "prismjs/plugins/line-numbers/prism-line-numbers.js";
+import "prismjs/plugins/show-language/prism-show-language.js"
+import "prismjs/plugins/treeview/prism-treeview.css"
+import "prismjs/plugins/treeview/prism-treeview.js"
+
+import "prismjs/themes/prism.css";

app/application/resources/site/js/_choose-documentation-version.js

@@ -0,0 +1,8 @@
+let blockDocumentationVersion = document.querySelector('#documentation-version');
+blockDocumentationVersion.querySelector('.documentation-version__button').addEventListener('click', (e) => {
+    if (blockDocumentationVersion.classList.contains('active')) {
+        blockDocumentationVersion.classList.remove('active');
+    } else {
+        blockDocumentationVersion.classList.add('active');
+    }
+});

app/application/resources/site/js/app.js

@@ -1,2 +1,3 @@
 import './_menu.js';
 import './_choose-language.js';
+import './_choose-documentation-version.js';

app/application/resources/site/scss/app.scss

@@ -43,7 +43,8 @@ body {
     grid-template-columns: 1fr 1fr;
     grid-template-areas:
         "logo menu"
-        "language language";
+        "language language"
+        "documentation-version documentation-version";
     padding: 8px;
     box-shadow: 0 3px 9px rgba(0,0,0,0.48);
     background: #eee;
@@ -79,7 +80,7 @@ body {
     margin-left: auto;
     cursor: pointer;
     position: relative;
-    z-index: 10;
+    z-index: 110;
 
     .open {
         display: block;
@@ -138,6 +139,7 @@ body.mobile-menu-open {
         overflow: auto;
         width: 100%;
         height: 100%;
+        z-index: 100;
     }
 }
 #language {
@@ -176,6 +178,7 @@ body.mobile-menu-open {
     padding: 10px 0;
     margin: 0;
     border-radius: 0 0 5px 5px;
+    z-index: 100;
 
     a {
         text-decoration: none;
@@ -193,6 +196,77 @@ body.mobile-menu-open {
         border-radius: 5px 5px 0 0;
     }
 }
+
+#documentation-version {
+    grid-area: documentation-version;
+    margin-top: 10px;
+
+    .status {
+        font-size: 13px;
+        color: #444;
+        display: block;
+    }
+    .status.status__100 {
+        color: #0a6f4d;
+    }
+    .status.status__50 {
+        color: #0a53be;
+    }
+    .status.status__0 {
+        color: #6c0e22;
+    }
+}
+.documentation-version__block {
+    position: relative;
+}
+.documentation-version__button {
+    border: 0;
+    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.48);
+    background: #ccc;
+    width: 100%;
+    cursor: pointer;
+    font-size: 18px;
+    position: relative;
+    padding: 10px;
+    border-radius: 5px;
+    color: #000;
+}
+.documentation-version__button__str {
+    position: absolute;
+    top: calc(50% - 8px);
+    right: 10px;
+}
+.documentation-version__list {
+    background: #ddd;
+    display: none;
+    position: absolute;
+    top: 100%;
+    left: 0;
+    width: 100%;
+    list-style: none;
+    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.48);
+    padding: 10px 0;
+    margin: 0;
+    border-radius: 0 0 5px 5px;
+    z-index: 100;
+
+    a {
+        text-decoration: none;
+        color: #000;
+        font-size: 16px;
+        display: block;
+        padding: 10px 20px;
+    }
+}
+#documentation-version.active {
+    .documentation-version__list {
+        display: block;
+    }
+    .documentation-version__button {
+        border-radius: 5px 5px 0 0;
+    }
+}
+
 .main-container {
     display: flex;
     flex-direction: column;
@@ -223,6 +297,15 @@ body.mobile-menu-open {
         font-weight: bold;
     }
 }
+.alert-version {
+    padding: 20px;
+    margin-top: 20px;
+    box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.5);
+    font-size: 16px;
+}
+.alert-version.version-status-not-supported {
+    color: #6c0e22;
+}
 
 @media (min-width: 1000px) {
     body {
@@ -230,8 +313,8 @@ body.mobile-menu-open {
         margin: 0 auto;
     }
     .header {
-        grid-template-areas: "logo language";
+        grid-template-areas: "logo documentation-version language";
-        grid-template-columns: 1fr 200px;
+        grid-template-columns: 1fr 200px 200px;
     }
     .header_logo {
         width: 150px;
@@ -242,9 +325,13 @@ body.mobile-menu-open {
     #mobile-menu {
         display: none;
     }
+    .wrapper .section-container {
+        flex: auto;
+    }
     .main-container {
         flex-direction: row;
     }
+
     #language {
         margin-right: 10px;
     }
@@ -254,7 +341,19 @@ body.mobile-menu-open {
     .language__button {
         padding: 7px 10px 7px 0;
     }
+
+    #documentation-version {
+        margin-right: 10px;
+    }
+    .documentation-version__block {
+        margin-top: 0px;
+    }
+    .documentation-version__button {
+        padding: 7px 10px 7px 0;
+    }
+
     #menu {
+        flex: none;
         background: #eee;
         display: block;
         width: 175px;

app/application/resources/views/_prism.blade.php

@@ -0,0 +1 @@
+@vite('resources/prism/app.js')

app/application/resources/views/admin/_scripts/_click-content-enable.blade.php

@@ -0,0 +1,33 @@
+<script>
+    (function() {
+        function clickEnableAddEventListener(element, index, array) {
+            let parent = element.closest('.{{ $classParent }}'),
+                contents = parent.querySelectorAll('.{{ $classContent }}'),
+                disabled = true;
+
+            if (element.checked) {
+                disabled = false;
+            }
+
+            contents.forEach(function (content) {
+                content.disabled = disabled;
+            });
+
+            element.addEventListener('click', (e) => {
+                let disabled = true;
+
+                if (element.checked) {
+                    disabled = false;
+                }
+
+                contents.forEach(function (content) {
+                    content.disabled = disabled;
+                });
+            });
+        }
+        let clickEnable = document.querySelectorAll('.{{ $classCheckbox }}');
+        if (clickEnable.length > 0) {
+            clickEnable.forEach(clickEnableAddEventListener);
+        }
+    })();
+</script>

app/application/resources/views/admin/projects/documentation-categories/_from.blade.php

@@ -0,0 +1,34 @@
+@csrf
+<x-volt.forms.checkbox :title="__('validation.attributes.is_public')" name="is_public" checkboxValue="1" notCheckedValue="0" :userValue="(string) $category->is_public" />
+<x-volt.forms.input :title="__('validation.attributes.slug')" allowed-characters="a-z0-9.-_" name="slug" type="text" :value="$category->slug" required autofocus />
+<x-volt.forms.input :title="__('validation.attributes.sort')" name="sort" type="number" :value="$category->sort" required />
+<x-volt.forms.select :title="__('validation.attributes.parent_id')" name="parent_id" :list="$categories" :value="(string) $category->parent_id">
+    <option value=""></option>
+</x-volt.forms.select>
+
+<nav>
+    <div class="nav nav-tabs mb-4" id="nav-language-tab" role="tablist">
+        @foreach($project->languages as $index => $language)
+            <a class="nav-item nav-link @if($index === 0) active @endif" id="language-{{ $language->id }}-tab" data-bs-toggle="tab" href="#language-{{ $language->id }}" role="tab" aria-controls="language-{{ $language->id }}" aria-selected="{{ $index ? 'false' : 'true' }}">{{ $language->title }}</a>
+        @endforeach
+    </div>
+</nav>
+<div class="tab-content" id="nav-language-tabContent">
+    @foreach($project->languages as $index => $language)
+        @php
+            $content = $category->contents->firstWhere('language_id', $language->id);
+        @endphp
+        <div class="tab-pane fade @if($index === 0) show active @endif" id="language-{{ $language->id }}" role="tabpanel" aria-labelledby="language-{{ $language->id }}-tab">
+            <x-volt.forms.checkbox :title="__('Edit')" :name="'content-enable-' . $language->id" :user-value="($index === 0) ? 1 : 0" class="content-enable" checkbox-value="1" notCheckedValue="0"/>
+            <x-volt.forms.input :title="__('validation.attributes.title')" :name="'content[' . $language->id . '][title]'" type="text" class="language-content" :disabled="$index !== 0" :value="$content?->title ?? ''" required />
+        </div>
+    @endforeach
+</div>
+
+@canany(['create', 'update'], $category)
+    <button class="btn btn-primary" type="submit">{{ __('Save') }}</button>
+@endcanany
+
+@push('scripts')
+    @include('admin._scripts._click-content-enable', ['classParent' => 'tab-pane', 'classCheckbox' => 'content-enable', 'classContent' => 'language-content'])
+@endpush

app/application/resources/views/admin/projects/documentation-categories/_top.blade.php

@@ -0,0 +1,25 @@
+<div class="mb-4">
+    @can('create', \App\Models\DocumentationCategory::class)
+        <a href="{{ route('admin.projects.documentation-versions.categories.create', ['project' => $project->id, 'version' => $version->id]) }}" class="btn btn-secondary d-inline-flex align-items-center me-2">
+            <svg class="icon icon-xs me-2" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6v6m0 0v6m0-6h6m-6 0H6"></path></svg>
+            {{ __('Create') }}
+        </a>
+    @endcan
+    @can('viewAny', \App\Models\DocumentationCategory::class)
+        <a href="{{ route('admin.projects.documentation-versions.categories.index', ['project' => $project->id, 'version' => $version->id]) }}" class="btn btn-secondary d-inline-flex align-items-center me-2">
+            <svg class="icon icon-xs me-2" data-slot="icon" fill="none" stroke-width="1.5" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
+                <path stroke-linecap="round" stroke-linejoin="round" d="M3.375 19.5h17.25m-17.25 0a1.125 1.125 0 0 1-1.125-1.125M3.375 19.5h7.5c.621 0 1.125-.504 1.125-1.125m-9.75 0V5.625m0 12.75v-1.5c0-.621.504-1.125 1.125-1.125m18.375 2.625V5.625m0 12.75c0 .621-.504 1.125-1.125 1.125m1.125-1.125v-1.5c0-.621-.504-1.125-1.125-1.125m0 3.75h-7.5A1.125 1.125 0 0 1 12 18.375m9.75-12.75c0-.621-.504-1.125-1.125-1.125H3.375c-.621 0-1.125.504-1.125 1.125m19.5 0v1.5c0 .621-.504 1.125-1.125 1.125M2.25 5.625v1.5c0 .621.504 1.125 1.125 1.125m0 0h17.25m-17.25 0h7.5c.621 0 1.125.504 1.125 1.125M3.375 8.25c-.621 0-1.125.504-1.125 1.125v1.5c0 .621.504 1.125 1.125 1.125m17.25-3.75h-7.5c-.621 0-1.125.504-1.125 1.125m8.625-1.125c.621 0 1.125.504 1.125 1.125v1.5c0 .621-.504 1.125-1.125 1.125m-17.25 0h7.5m-7.5 0c-.621 0-1.125.504-1.125 1.125v1.5c0 .621.504 1.125 1.125 1.125M12 10.875v-1.5m0 1.5c0 .621-.504 1.125-1.125 1.125M12 10.875c0 .621.504 1.125 1.125 1.125m-2.25 0c.621 0 1.125.504 1.125 1.125M13.125 12h7.5m-7.5 0c-.621 0-1.125.504-1.125 1.125M20.625 12c.621 0 1.125.504 1.125 1.125v1.5c0 .621-.504 1.125-1.125 1.125m-17.25 0h7.5M12 14.625v-1.5m0 1.5c0 .621-.504 1.125-1.125 1.125M12 14.625c0 .621.504 1.125 1.125 1.125m-2.25 0c.621 0 1.125.504 1.125 1.125m0 1.5v-1.5m0 0c0-.621.504-1.125 1.125-1.125m0 0h7.5"></path>
+            </svg>
+            {{ __('List') }}
+        </a>
+    @endcan
+    @can('viewAny', \App\Models\Documentation::class)
+        <a href="{{ route('admin.projects.documentation-versions.documentations.index', ['project' => $project->id, 'version' => $version->id]) }}" class="btn btn-secondary d-inline-flex align-items-center me-2">
+            <svg class="icon icon-xs me-2" data-slot="icon" fill="none" stroke-width="1.5" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
+                <path stroke-linecap="round" stroke-linejoin="round" d="M3.375 19.5h17.25m-17.25 0a1.125 1.125 0 0 1-1.125-1.125M3.375 19.5h7.5c.621 0 1.125-.504 1.125-1.125m-9.75 0V5.625m0 12.75v-1.5c0-.621.504-1.125 1.125-1.125m18.375 2.625V5.625m0 12.75c0 .621-.504 1.125-1.125 1.125m1.125-1.125v-1.5c0-.621-.504-1.125-1.125-1.125m0 3.75h-7.5A1.125 1.125 0 0 1 12 18.375m9.75-12.75c0-.621-.504-1.125-1.125-1.125H3.375c-.621 0-1.125.504-1.125 1.125m19.5 0v1.5c0 .621-.504 1.125-1.125 1.125M2.25 5.625v1.5c0 .621.504 1.125 1.125 1.125m0 0h17.25m-17.25 0h7.5c.621 0 1.125.504 1.125 1.125M3.375 8.25c-.621 0-1.125.504-1.125 1.125v1.5c0 .621.504 1.125 1.125 1.125m17.25-3.75h-7.5c-.621 0-1.125.504-1.125 1.125m8.625-1.125c.621 0 1.125.504 1.125 1.125v1.5c0 .621-.504 1.125-1.125 1.125m-17.25 0h7.5m-7.5 0c-.621 0-1.125.504-1.125 1.125v1.5c0 .621.504 1.125 1.125 1.125M12 10.875v-1.5m0 1.5c0 .621-.504 1.125-1.125 1.125M12 10.875c0 .621.504 1.125 1.125 1.125m-2.25 0c.621 0 1.125.504 1.125 1.125M13.125 12h7.5m-7.5 0c-.621 0-1.125.504-1.125 1.125M20.625 12c.621 0 1.125.504 1.125 1.125v1.5c0 .621-.504 1.125-1.125 1.125m-17.25 0h7.5M12 14.625v-1.5m0 1.5c0 .621-.504 1.125-1.125 1.125M12 14.625c0 .621.504 1.125 1.125 1.125m-2.25 0c.621 0 1.125.504 1.125 1.125m0 1.5v-1.5m0 0c0-.621.504-1.125 1.125-1.125m0 0h7.5"></path>
+            </svg>
+            {{ __('admin-sections.Documentation') }}
+        </a>
+    @endcan
+</div>
+

app/application/resources/views/admin/projects/documentation-categories/create.blade.php

@@ -0,0 +1,19 @@
+@section('meta_title', __('admin-sections.Categories'))
+@section('h1')
+    {{ __('admin-sections.Project') . ': ' . $project->name . ' (' . $version->title . ')' }}
+@endsection
+<x-admin.layout>
+    @include('admin.projects.documentation-categories._top')
+    <div class="row">
+        <div class="col-12 mb-4">
+            <div class="card border-0 shadow components-section">
+                <div class="card-body">
+                    <h3 id="category" class="mb-4">{{ __('admin-sections.Categories') }}</h3>
+                    <form method="post" action="{{ route('admin.projects.documentation-versions.categories.store', ['project' => $project->id, 'version' => $version->id]) }}">
+                        @include('admin.projects.documentation-categories._from')
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</x-admin.layout>

app/application/resources/views/admin/projects/documentation-categories/edit.blade.php

@@ -0,0 +1,20 @@
+@section('meta_title', __('admin-sections.Categories'))
+@section('h1')
+    {{ __('admin-sections.Project') . ': ' . $project->name . ' (' . $version->title . ')' }}
+@endsection
+<x-admin.layout>
+    @include('admin.projects.documentation-categories._top')
+    <div class="row">
+        <div class="col-12 mb-4">
+            <div class="card border-0 shadow components-section">
+                <div class="card-body">
+                    <h3 id="category" class="mb-4">{{ __('admin-sections.Categories') }}</h3>
+                    <form method="post" action="{{ route('admin.projects.documentation-versions.categories.update', ['project' => $project->id, 'version' => $version->id, 'category' => $category->id]) }}">
+                        @method('PUT')
+                        @include('admin.projects.documentation-categories._from')
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</x-admin.layout>