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/Head.php
+++ b/app/Captcha/Images/Head.php
@@ -0,0 +1,72 @@
+<?php declare(strict_types=1);
+
+namespace App\Captcha\Images;
+
+use App\Captcha\Config\ImageHead as ImageHeadConfig;
+use App\Captcha\Contracts\ImageLines;
+use App\Captcha\Dto\Image as ImageDto;
+use App\Captcha\Dto\ImageHead as ImageHeadDto;
+use App\Captcha\Dto\Symbols;
+use App\Captcha\Contracts\ImageHead;
+use \App\Captcha\Contracts\Image as ImageContract;
+use App\Captcha\Enums\SymbolType;
+use App\Captcha\Contracts\ImageManager;
+
+final class Head implements ImageHead
+{
+    public function __construct(
+        private readonly ImageManager $imageManager,
+        private readonly ImageLines $imageLines
+    ) { }
+
+    public function processing(Symbols $symbols, ImageHeadConfig $config): ImageHeadDto
+    {
+        $image = $this->imageManager->createImage($config->getWidth(), $config->getHeight());
+        $image->insertBackground($config->randomBackground());
+
+        $image = match ($symbols->getType()) {
+            SymbolType::String => $this->processingString($image, $symbols, $config),
+        };
+        if ($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 ImageHeadDto(image: $image);
+    }
+
+    private function processingString(ImageContract $image, Symbols $symbols, ImageHeadConfig $config): Image
+    {
+        $textLeftPadding = $config->getTextPaddingLeft();
+        $textTopPadding  = $config->getTextPaddingTop();
+        $countSymbols    = count($symbols->getSuccess());
+        $widthPrefix     = $image->getWidth() - $textLeftPadding;
+        $imageHeight     = $image->getHeight() - $textTopPadding;
+
+        foreach ($symbols->getSuccess() as $number => $symbol) {
+            $marginLeft = $textLeftPadding + $number * $widthPrefix / $countSymbols;
+
+            $image->addText(
+                text:     $symbol,
+                x:        intval($marginLeft),
+                y:        $textTopPadding,
+                size:     $this->randomFontSize($imageHeight),
+                angle:    $config->randomAngle(),
+                hexColor: $config->randomFontColor(),
+                fontName: $config->randomFont()
+            );
+        }
+
+        return $image;
+    }
+
+    private function randomFontSize(int $imageHeight): int
+    {
+        return mt_rand($imageHeight - 10, $imageHeight);
+    }
+}