A documentation section has been added to the site.

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

@@ -2,14 +2,22 @@
 
 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

@@ -2,14 +2,22 @@
 
 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/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

@@ -2,6 +2,7 @@
 
 namespace App\Enums;
 
+use App\Services\WebsiteTranslations;
 use Illuminate\Support\Collection;
 
 enum DocumentationVersionStatus: int
@@ -11,9 +12,18 @@ enum DocumentationVersionStatus: int
     case CurrentVersion = 100;
     case FutureVersion  = 150;
 
-    public function getTitle(): string
+    public function getTitle(?WebsiteTranslations $websiteTranslations = null): string
     {
-        return __('version-status.' . $this->name);
+        if (\is_null($websiteTranslations)) {
+            return __($this->getCodeForTranslation());
+        }
+
+        return $websiteTranslations->translate($this->getCodeForTranslation());
+    }
+
+    public function getCodeForTranslation(): string
+    {
+        return 'version-status.' . $this->name;
     }
 
     public static function toArray(): array

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/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/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/Models/Documentation.php

@@ -2,6 +2,8 @@
 
 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;
@@ -9,6 +11,7 @@
 use Illuminate\Database\Eloquent\Relations\HasOne;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
+#[ScopedBy([SortScope::class])]
 final class Documentation extends Model
 {
     use HasFactory, SoftDeletes;

app/application/app/Models/DocumentationVersion.php

@@ -3,6 +3,7 @@
 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;
@@ -37,6 +38,16 @@ final class DocumentationVersion extends Model
         '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.
      *

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

@@ -4,6 +4,7 @@
 
 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;
@@ -35,9 +36,19 @@ public function getCategoryById(int $id): ?DocumentationCategory
         return DocumentationCategory::query()->where('id', $id)->first();
     }
 
-    public function getCategoryByCode(string $code): ?DocumentationCategory
+    public function getCategoryBySlugWithContent(string $slug, int $versionId, ProjectLanguage $language): ?DocumentationCategory
     {
-        return DocumentationCategory::query()->where('code', $code)->first();
+        $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

app/application/app/Repositories/DocumentationRepository.php

@@ -5,9 +5,11 @@
 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
@@ -32,9 +34,19 @@ public function getDocumentationById(int $id): ?Documentation
         return Documentation::query()->where('id', $id)->first();
     }
 
-    public function getDocumentationByCode(string $code): ?Documentation
+    public function getDocumentationBySlugWithContent(string $slug, int $versionId, ProjectLanguage $language): ?Documentation
     {
-        return Documentation::query()->where('code', $code)->first();
+        $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

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/DocumentationVersionService.php

@@ -5,6 +5,7 @@
 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;
@@ -14,6 +15,7 @@
 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;
@@ -24,6 +26,7 @@ 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
@@ -138,6 +141,7 @@ public function store(int $projectId, StoreUpdate $data, User $user): ServiceRes
                 $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'));
@@ -174,6 +178,7 @@ public function update(int $projectId, int $versionId, StoreUpdate $data, User $
                 $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'));
@@ -202,6 +207,7 @@ public function destroy(int $projectId, int $versionId, User $user): ServiceResu
             DB::transaction(function () use ($version) {
                 $this->documentationVersionCommandHandler->handleDestroy($version);
             });
+            $this->clearCacheCommandHandler->byTag(CacheTag::DocumantationVersion);
         } catch (\Throwable $e) {
             report($e);
             return $this->errService(__('Server Error'));

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

@@ -10,10 +10,12 @@
 {
     public function execute(Relation | Builder $query, DocumentationBuilderDto $documentationBuilderDto): Relation | Builder
     {
-        if ($documentationBuilderDto->isPublic() !== null) {
+        return $query
+            ->when($documentationBuilderDto->isPublic(), function (Builder $query) use ($documentationBuilderDto) {
                 $query->where('is_public', $documentationBuilderDto->isPublic());
-        }
+            })
-
+            ->when($documentationBuilderDto->getCategoryId(), function (Builder $query) use ($documentationBuilderDto) {
-        return $query;
+                $query->where('category_id', $documentationBuilderDto->getCategoryId()->getCategoryId());
+            });
     }
 }

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

@@ -10,10 +10,12 @@
 {
     public function execute(Relation | Builder $query, DocumentationCategoryBuilderDto $documentationCategoryBuilderDto): Relation | Builder
     {
-        if ($documentationCategoryBuilderDto->isPublic() !== null) {
+        return $query
+            ->when($documentationCategoryBuilderDto->isPublic(), function (Builder $query) use ($documentationCategoryBuilderDto) {
                 $query->where('is_public', $documentationCategoryBuilderDto->isPublic());
-        }
+            })
-
+            ->when($documentationCategoryBuilderDto->getParentId(), function (Builder $query) use ($documentationCategoryBuilderDto) {
-        return $query;
+                $query->where('parent_id', $documentationCategoryBuilderDto->getParentId()->getCategoryId());
+            });
     }
 }

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/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/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/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;
@@ -195,6 +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;
@@ -225,6 +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 {
@@ -232,8 +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;
@@ -250,6 +331,7 @@ body.mobile-menu-open {
     .main-container {
         flex-direction: row;
     }
+
     #language {
         margin-right: 10px;
     }
@@ -259,6 +341,17 @@ 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;

app/application/resources/views/components/site/choose-version.blade.php

@@ -0,0 +1,18 @@
+<div id="documentation-version">
+    <div class="documentation-version__block">
+        <button class="documentation-version__button" type="button" aria-label="{{ $websiteTranslations->translate('site.Choose version') }}">
+            <svg width="16" height="16" data-slot="icon" fill="currentColor" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
+                <path clip-rule="evenodd" fill-rule="evenodd" d="M4 2a1.5 1.5 0 0 0-1.5 1.5v9A1.5 1.5 0 0 0 4 14h8a1.5 1.5 0 0 0 1.5-1.5V6.621a1.5 1.5 0 0 0-.44-1.06L9.94 2.439A1.5 1.5 0 0 0 8.878 2H4Zm1 5.75A.75.75 0 0 1 5.75 7h4.5a.75.75 0 0 1 0 1.5h-4.5A.75.75 0 0 1 5 7.75Zm0 3a.75.75 0 0 1 .75-.75h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1-.75-.75Z"></path>
+            </svg>
+            {{ $version->title }} <span class="status status__{{ $version->status->value }}">({{ $version->status->getTitle($websiteTranslations) }})</span>
+            <svg width="16" height="16" class="documentation-version__button__str" 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="m19.5 8.25-7.5 7.5-7.5-7.5"></path>
+            </svg>
+        </button>
+        <ul class="documentation-version__list">
+            @foreach($versions as $v)
+                <li><a href="{{ \App\Enums\Site\ProjectSection::DocumentationVersion->url($project, $websiteTranslations->getLanguage(), ['version' => $v->slug]) }}">{{ $v->title }} <span class="status status__{{ $v->status->value }}">({{ $v->status->getTitle($websiteTranslations) }})</span></a></li>
+            @endforeach
+        </ul>
+    </div>
+</div>

app/application/resources/views/components/site/documentation-version.blade.php

@@ -0,0 +1,10 @@
+@if($version->status === \App\Enums\DocumentationVersionStatus::NotSupported)
+    <div class="alert-version version-status-not-supported">
+        {{ $websiteTranslations->translate('site.alert-status-not-supported') }}
+    </div>
+@endif
+@if($version->status === \App\Enums\DocumentationVersionStatus::FutureVersion)
+    <div class="alert-version version-status-future">
+        {{ $websiteTranslations->translate('site.alert-status-future') }}
+    </div>
+@endif

app/application/resources/views/layout/site.blade.php

@@ -30,6 +30,9 @@
                     <path stroke-linecap="round" stroke-linejoin="round" d="M6 18 18 6M6 6l12 12"></path>
                 </svg>
             </button>
+            @if($attributes->has('documentationVersion'))
+                <x-site.choose-version :version="$attributes->get('documentationVersion')" :websiteTranslations="$websiteTranslations" :project="$project" :user="auth()->user()" />
+            @endif
             <x-site.choose-language :websiteTranslations="$websiteTranslations" :project="$project" />
         </header>
         <div class="main-container">
@@ -37,11 +40,15 @@
                 <div class="menu__title">{{ __('site.Menu') }}</div>
                 <ul>
                     <li><a href="{{ \App\Enums\Site\ProjectSection::Home->url($project, $websiteTranslations->getLanguage()) }}" @class(['active' => request()->route()->named(['home', 'language.home', 'project.home', 'project.language.home'])])>{{ $websiteTranslations->translate('site.About project') }}</a></li>
+                    <li><a href="{{ \App\Enums\Site\ProjectSection::Documentation->url($project, $websiteTranslations->getLanguage()) }}" @class(['active' => request()->route()->named(['documentation', 'documentation.home'])])>{{ $websiteTranslations->translate('site.Documentation') }}</a></li>
                     <li><a href="{{ \App\Enums\Site\ProjectSection::Feedback->url($project, $websiteTranslations->getLanguage()) }}" @class(['active' => request()->route()->named(['feedback', 'language.feedback', 'project.feedback', 'project.language.feedback'])])>{{ $websiteTranslations->translate('site.Feedback') }}</a></li>
                 </ul>
             </nav>
             <div class="section-container">
                 <div class="content">
+                    @if($attributes->has('documentationVersion'))
+                        <x-site.documentation-version :websiteTranslations="$websiteTranslations" :version="$attributes->get('documentationVersion')" />
+                    @endif
                     <h1>@yield('h1', '')</h1>
 
                     @includeWhen($errors->any(), 'layout.site._errors', ['errors' => $errors->all()])

app/application/resources/views/site/projects/documentation/category.blade.php

@@ -0,0 +1,13 @@
+@section('meta_title', $category->content?->title . ' - ' . $project->name . ' ' . $version->title)
+@section('h1', $category->content?->title)
+
+<x-site.layout :project="$project" :websiteTranslations="$websiteTranslations" :documentationVersion="$version">
+    @foreach($categories as $category)
+        @continue(! $category->content?->title)
+        <p><a href="{{ \App\Enums\Site\ProjectSection::DocumentationCategory->url($project, $websiteTranslations->getLanguage(), ['version' => $version->slug, 'slug' => $category->slug]) }}">{{ $category->content->title }}</a></p>
+    @endforeach
+    @foreach($documentations as $documentation)
+        @continue(! $documentation->content?->title)
+        <p><a href="{{ \App\Enums\Site\ProjectSection::DocumentationView->url($project, $websiteTranslations->getLanguage(), ['version' => $version->slug, 'slug' => $documentation->slug]) }}">{{ $documentation->content->title }}</a></p>
+    @endforeach
+</x-site.layout>

app/application/resources/views/site/projects/documentation/index.blade.php

@@ -0,0 +1,13 @@
+@section('meta_title', $websiteTranslations->translate('site.Documentation') . ' - ' . $project->name . ' ' . $version->title)
+@section('h1', $websiteTranslations->translate('site.Documentation'))
+
+<x-site.layout :project="$project" :websiteTranslations="$websiteTranslations" :documentationVersion="$version">
+    @foreach($categories as $category)
+        @continue(! $category->content?->title)
+        <p><a href="{{ \App\Enums\Site\ProjectSection::DocumentationCategory->url($project, $websiteTranslations->getLanguage(), ['version' => $version->slug, 'slug' => $category->slug]) }}">{{ $category->content->title }}</a></p>
+    @endforeach
+    @foreach($documentations as $documentation)
+        @continue(! $documentation->content?->title)
+        <p><a href="{{ \App\Enums\Site\ProjectSection::DocumentationView->url($project, $websiteTranslations->getLanguage(), ['version' => $version->slug, 'slug' => $documentation->slug]) }}">{{ $documentation->content->title }}</a></p>
+    @endforeach
+</x-site.layout>

app/application/resources/views/site/projects/documentation/no-default-version.blade.php

@@ -0,0 +1,6 @@
+@section('meta_title', $websiteTranslations->translate('site.Documentation not created'))
+@section('h1', $websiteTranslations->translate('site.Documentation not created'))
+
+<x-site.layout :project="$project" :websiteTranslations="$websiteTranslations">
+
+</x-site.layout>

app/application/resources/views/site/projects/documentation/view.blade.php

@@ -0,0 +1,9 @@
+@section('meta_title', $documentation->content?->title . ' - ' . $project->name . ' ' . $version->title)
+@section('h1', $documentation->content?->title)
+
+<x-site.layout :project="$project" :websiteTranslations="$websiteTranslations" :documentationVersion="$version">
+    <div class="line-numbers">{!! $documentation->content->content !!}</div>
+    @push('scripts')
+        @include('_prism')
+    @endpush
+</x-site.layout>

app/application/routes/web-project.php

@@ -6,6 +6,22 @@
 Route::middleware([\App\Http\Middleware\IsProject::class, \App\Http\Middleware\IsWebsiteTranslations::class])->group(function () {
     Route::get('/language/{language}', [\App\Http\Controllers\Site\ProjectsController::class, 'index'])->name('home-language');
 
+    Route::prefix('docs')->group(function () {
+        Route::get('/', [\App\Http\Controllers\Site\DocumentationController::class, 'defaultVersion'])->name('documentation');
+        Route::get('language/{language}', [\App\Http\Controllers\Site\DocumentationController::class, 'defaultVersion'])->name('documentation-language');
+
+        Route::middleware([\App\Http\Middleware\DocumentationVersion::class])->prefix('{version}')->group(function () {
+            Route::get('/', [\App\Http\Controllers\Site\DocumentationController::class, 'index'])->name('documentation.version');
+            Route::get('language/{language}', [\App\Http\Controllers\Site\DocumentationController::class, 'index'])->name('documentation.version-language');
+
+            Route::get('category/{slug}', [\App\Http\Controllers\Site\DocumentationController::class, 'category'])->name('documentation.category');
+            Route::get('category/{slug}/language/{language}', [\App\Http\Controllers\Site\DocumentationController::class, 'category'])->name('documentation.category-language');
+
+            Route::get('{slug}', [\App\Http\Controllers\Site\DocumentationController::class, 'view'])->name('documentation.view');
+            Route::get('{slug}/language/{language}', [\App\Http\Controllers\Site\DocumentationController::class, 'view'])->name('documentation.view-language');
+        });
+    });
+
     Route::prefix('feedback')->group(function () {
         Route::get('/', [\App\Http\Controllers\Site\FeedbackController::class, 'index'])->name('feedback');
         Route::get('language/{language}', [\App\Http\Controllers\Site\FeedbackController::class, 'index'])->name('feedback-language');