CmdMagickImageMetadataReader.php: rename from MagickImageMetadataReader.php

inc/Service/Media/CmdMagickImageMetadataReader.php

@@ -0,0 +1,70 @@
+<?php
+namespace Vichan\Service\Media;
+
+use Vichan\Data\{Exif, ImageMetadataResult};
+use Vichan\Functions\Mime;
+
+
+class CmdMagickImageMetadataReader implements ImageMetadataReader {
+	private string $prefix;
+
+
+	private static function parseOrientation(string $str): ?int {
+		switch ($str) {
+			case 'Undefined':
+				return Exif::EXIF_ORIENTATION_UNDEFINED;
+			case 'TopLeft':
+				return Exif::EXIF_ORIENTATION_0_UPRIGHT;
+			case 'TopRight':
+				return Exif::EXIF_ORIENTATION_0_FLIPPED;
+			case 'BottomRight':
+				return Exif::EXIF_ORIENTATION_180_UPRIGHT;
+			case 'BottomLeft':
+				return Exif::EXIF_ORIENTATION_180_FLIPPED;
+			case 'LeftTop':
+				return Exif::EXIF_ORIENTATION_90_UPRIGHT;
+			case 'RightTop':
+				return Exif::EXIF_ORIENTATION_90_FLIPPED;
+			case 'RightBottom':
+				return Exif::EXIF_ORIENTATION_270_UPRIGHT;
+			case 'LeftBottom':
+				return Exif::EXIF_ORIENTATION_270_FLIPPED;
+			case 'Unrecognized':
+			default:
+				return null;
+		}
+	}
+
+	public static function createImageMagickReader(): self {
+		return new self('magick');
+	}
+
+	public static function createGraphicsMagickReader(): self {
+		return new self('gm');
+	}
+
+	private function __construct(string $prefix) {
+		$this->prefix = $prefix;
+	}
+
+	public function getMetadata(string $file_path): ImageMetadataResult {
+		$arg = \escapeshellarg("$file_path[0]");
+		$ret_exec = shell_exec_error("{$this->prefix} identify -format \"%w %h %m\" $arg");
+
+		if (!\is_string($ret_exec)) {
+			throw new \RuntimeException("Error while executing identify");
+		}
+		$ret_match = \preg_match('/^(\d+) (\d+) ([\w\d]+) ([\w]+)$/', $ret_exec, $m);
+		if (!$ret_match) {
+			throw new \RuntimeException("Could not parse identify output");
+		}
+		$width = $m[1];
+		$height = $m[2];
+		$ext = $m[3];
+		$orientation_str = $m[4];
+
+		$mime = Mime\ext_to_mime($ext) ?? 'application/octet-stream';
+		$exif_orientation = self::parseOrientation($orientation_str);
+		return new ImageMetadataResult($width, $height, $mime, $exif_orientation);
+	}
+}