APP als Hybrid Version - Anbindung an API

2026-06-05 09:54:12 +02:00 · 2026-06-05 09:54:12 +02:00 · c1514999be
commit c1514999be
parent d054732bf5
46 changed files with 3418 additions and 196 deletions
--- a/backend/app/Services/EventMediaImageProcessor.php
+++ b/backend/app/Services/EventMediaImageProcessor.php
@ -0,0 +1,125 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Http\UploadedFile;
+use RuntimeException;
+
+class EventMediaImageProcessor
+{
+    private const MAX_ORIGINAL_SIDE = 3508;
+
+    private const PREVIEW_MAX_SIDE = 900;
+
+    private const THUMBNAIL_SIZE = 320;
+
+    /**
+     * @return array{
+     *     original: string,
+     *     preview: string,
+     *     thumbnail: string,
+     *     width: int,
+     *     height: int,
+     *     preview_width: int,
+     *     preview_height: int,
+     *     thumbnail_width: int,
+     *     thumbnail_height: int,
+     *     mime_type: string,
+     *     size: int
+     * }
+     */
+    public function process(UploadedFile $file): array
+    {
+        $source = imagecreatefromstring((string) file_get_contents($file->getRealPath()));
+
+        if (! $source) {
+            throw new RuntimeException('The uploaded image could not be processed.');
+        }
+
+        $sourceWidth = imagesx($source);
+        $sourceHeight = imagesy($source);
+
+        $original = $this->resizeContain($source, $sourceWidth, $sourceHeight, self::MAX_ORIGINAL_SIDE);
+        $preview = $this->resizeContain($source, $sourceWidth, $sourceHeight, self::PREVIEW_MAX_SIDE, 84);
+        $thumbnail = $this->resizeCover($source, $sourceWidth, $sourceHeight, self::THUMBNAIL_SIZE);
+
+        imagedestroy($source);
+
+        return [
+            'original' => $original['contents'],
+            'preview' => $preview['contents'],
+            'thumbnail' => $thumbnail['contents'],
+            'width' => $original['width'],
+            'height' => $original['height'],
+            'preview_width' => $preview['width'],
+            'preview_height' => $preview['height'],
+            'thumbnail_width' => self::THUMBNAIL_SIZE,
+            'thumbnail_height' => self::THUMBNAIL_SIZE,
+            'mime_type' => 'image/jpeg',
+            'size' => strlen($original['contents']),
+        ];
+    }
+
+    /**
+     * @return array{contents: string, width: int, height: int}
+     */
+    private function resizeContain(
+        \GdImage $source,
+        int $sourceWidth,
+        int $sourceHeight,
+        int $maxSide,
+        int $quality = 90
+    ): array {
+        $scale = min(1, $maxSide / max($sourceWidth, $sourceHeight));
+        $width = max(1, (int) round($sourceWidth * $scale));
+        $height = max(1, (int) round($sourceHeight * $scale));
+
+        $canvas = imagecreatetruecolor($width, $height);
+        $this->fillCanvas($canvas, $width, $height);
+        imagecopyresampled($canvas, $source, 0, 0, 0, 0, $width, $height, $sourceWidth, $sourceHeight);
+
+        return [
+            'contents' => $this->encodeJpeg($canvas, $quality),
+            'width' => $width,
+            'height' => $height,
+        ];
+    }
+
+    /**
+     * @return array{contents: string, width: int, height: int}
+     */
+    private function resizeCover(\GdImage $source, int $sourceWidth, int $sourceHeight, int $size): array
+    {
+        $scale = max($size / $sourceWidth, $size / $sourceHeight);
+        $width = (int) round($sourceWidth * $scale);
+        $height = (int) round($sourceHeight * $scale);
+        $x = (int) round(($size - $width) / 2);
+        $y = (int) round(($size - $height) / 2);
+
+        $canvas = imagecreatetruecolor($size, $size);
+        $this->fillCanvas($canvas, $size, $size);
+        imagecopyresampled($canvas, $source, $x, $y, 0, 0, $width, $height, $sourceWidth, $sourceHeight);
+
+        return [
+            'contents' => $this->encodeJpeg($canvas, 80),
+            'width' => $size,
+            'height' => $size,
+        ];
+    }
+
+    private function fillCanvas(\GdImage $canvas, int $width, int $height): void
+    {
+        $background = imagecolorallocate($canvas, 255, 255, 255);
+        imagefilledrectangle($canvas, 0, 0, $width, $height, $background);
+    }
+
+    private function encodeJpeg(\GdImage $image, int $quality): string
+    {
+        ob_start();
+        imagejpeg($image, null, $quality);
+        $contents = (string) ob_get_clean();
+        imagedestroy($image);
+
+        return $contents;
+    }
+}