Add captcha image generation functionality.

2023-06-28 17:29:56 +06:00
parent 81635b4efa
commit a35b8db281
26 changed files with 1211 additions and 5 deletions
--- a/app/Captcha/Images/Body.php
+++ b/app/Captcha/Images/Body.php
@@ -0,0 +1,117 @@
+<?php declare(strict_types=1);
+
+namespace App\Captcha\Images;
+
+use App\Captcha\Config\ImageBody as ImageBodyConfig;
+use App\Captcha\Contracts\ImageLines;
+use App\Captcha\Dto\Coordinators;
+use App\Captcha\Dto\Image as ImageDto;
+use App\Captcha\Dto\ImageBody as ImageBodyDto;
+use App\Captcha\Dto\Sector;
+use App\Captcha\Dto\Sectors;
+use App\Captcha\Dto\Symbols;
+use App\Captcha\Contracts\ImageBody;
+use App\Captcha\Enums\SymbolType;
+use App\Captcha\Contracts\ImageManager;
+
+final class Body implements ImageBody
+{
+    public function __construct(
+        private readonly ImageManager $imageManager,
+        private readonly ImageLines $imageLines
+    ) { }
+
+    public function processing(Symbols $symbols, ImageBodyConfig $config): ImageBodyDto
+    {
+        $image = $this->imageManager->createImage($config->getWidth(), $config->getHeight());
+        $image->insertBackground($config->randomBackground());
+
+        $imageData = match ($symbols->getType()) {
+            SymbolType::String => $this->processingString($image, $symbols, $config),
+        };
+        $image = $imageData['image'];
+
+        if ($config->getNumberLines() > 0) {
+            $this->imageLines->processing(image: $image, colors: $config->getLineColors(), lines: $config->getNumberLines());
+        }
+
+        $image = new ImageDto(
+            imageBase64: $image->encode(),
+            width: $image->getWidth(),
+            height: $image->getHeight()
+        );
+
+        return new ImageBodyDto(
+            image: $image,
+            coordinators: $imageData['coordinators']
+        );
+    }
+
+    private function processingString(Image $image, Symbols $symbols, ImageBodyConfig $config): array
+    {
+        $sectors = $this->calculateSectors($symbols, $image->getWidth(), $image->getHeight());
+        $coordinators = [];
+        foreach ($symbols->getSuccess() as $number => $symbol) {
+            $coordinators[] = $this->processingStringSymbol($image, $symbol, $config, $sectors->random());
+        }
+
+        if (!empty($symbols->getFakes())) {
+            foreach ($symbols->getFakes() as $number => $symbol) {
+                $this->processingStringSymbol($image, $symbol, $config, $sectors->random());
+            }
+        }
+
+        return [
+            'image' => $image,
+            'coordinators' => $coordinators
+        ];
+    }
+
+    private function processingStringSymbol(Image &$image, string|int $symbol, ImageBodyConfig $config, Sector $sector): Coordinators
+    {
+        $fontSize = $config->fontSize();
+        if ($fontSize > $sector->getHeight()) {
+            $fontSize = $sector->getHeight();
+        }
+        $fontPathFile = $config->randomFont();
+        $fontColor = $config->randomFontColor();
+        $angle = $config->randomAngle();
+        $marginLeft = mt_rand($sector->getX(), $sector->getX() + $sector->getWidth() - $fontSize);
+        $marginTop = mt_rand($sector->getY(), $sector->getY() + $sector->getHeight() - $fontSize);
+
+        return $image->addText(
+            text: $symbol,
+            x: $marginLeft,
+            y: $marginTop,
+            size: $fontSize,
+            angle: $angle,
+            hexColor: $fontColor,
+            fontName: $fontPathFile
+        );
+    }
+
+    private function calculateSectors(Symbols $symbols, int $width, int $height): Sectors
+    {
+        $points = count($symbols->getSuccess()) + count($symbols->getFakes());
+        $sumFloors = 3;
+        $sumRooms = ceil($points / $sumFloors);
+
+        $heightFloor = floor($height / $sumFloors);
+        $widthFloor  = floor($width / $sumRooms);
+
+        $sectors = new Sectors();
+        for ($floor = 0; $floor < $sumFloors; $floor++) {
+            $y = $heightFloor * $floor;
+            for ($room = 0; $room < $sumRooms; $room++) {
+                $sectors->add(
+                    x: ($widthFloor * $room),
+                    y: $y,
+                    width:  $widthFloor,
+                    height: $heightFloor
+                );
+            }
+        }
+
+        return $sectors;
+    }
+}