feat: re-add ability to specify multiple conversion tuples per provider

Signed-off-by: Elizabeth Danzberger <lizzy7128@tutanota.de>

Author: elzody

apps/files/lib/Capabilities.php

@@ -44,7 +44,7 @@ public function getCapabilities(): array {
 
 				'file_conversions' => array_map(function (ConversionMimeTuple $mimeTuple) {
 					return $mimeTuple->jsonSerialize();
-				}, $this->fileConversionManager->getMimeTypes())
+				}, $this->fileConversionManager->getMimeTypes()),
 			],
 		];
 	}

apps/testing/lib/Conversion/ConversionProvider.php

@@ -20,10 +20,12 @@ public function __construct(
 	) {
 	}
 
-	public function getSupportedMimeType(): ConversionMimeTuple {
-		return new ConversionMimeTuple('image/jpeg', [
-			'image/png' => $this->l10n->t('Image (.png)'),
-		]);
+	public function getSupportedMimeTypes(): array {
+		return [
+			new ConversionMimeTuple('image/jpeg', [
+				'image/png' => $this->l10n->t('Image (.png)'),
+			])
+		];
 	}
 
 	public function convertFile(File $file, string $targetMimeType): mixed {

lib/private/Files/Conversion/ConversionManager.php

@@ -11,6 +11,7 @@
 
 use OC\AppFramework\Bootstrap\Coordinator;
 use OC\SystemConfig;
+use OCP\Files\Conversion\ConversionMimeTuple;
 use OCP\Files\Conversion\IConversionManager;
 use OCP\Files\Conversion\IConversionProvider;
 use OCP\Files\File;
@@ -53,10 +54,13 @@ public function hasProviders(): bool {
 	}
 
 	public function getMimeTypes(): array {
+		/** @var list<ConversionMimeTuple> */
 		$mimeTypes = [];
 
 		foreach ($this->getProviders() as $provider) {
-			$mimeTypes[] = $provider->getSupportedMimeType();
+			/** @var list<ConversionMimeTuple> */
+			$providerMimeTypes = $provider->getSupportedMimeTypes();
+			$mimeTypes = array_merge($mimeTypes, $providerMimeTypes);
 		}
 
 		return $mimeTypes;
@@ -75,18 +79,9 @@ public function convert(File $file, string $targetMimeType, ?string $destination
 		}
 
 		$fileMimeType = $file->getMimetype();
-		$validProvider = null;
-		foreach ($this->getProviders() as $provider) {
-			['from' => $from, 'to' => $to] = $provider->getSupportedMimeType()->jsonSerialize();
-			$canConvert = ($from === $fileMimeType) && array_key_exists($targetMimeType, $to);
+		$validProvider = $this->getValidProvider($fileMimeType, $targetMimeType);
 
-			if ($canConvert) {
-				$validProvider = $provider;
-				break;
-			}
-		}
-
-		if ($validProvider) {
+		if ($validProvider !== null) {
 			$convertedFile = $validProvider->convertFile($file, $targetMimeType);
 
 			if ($destination !== null) {
@@ -133,4 +128,25 @@ public function getProviders(): array {
 	private function writeToDestination(string $destination, mixed $content): File {
 		return $this->rootFolder->newFile($destination, $content);
 	}
+
+	private function getValidProvider(string $fileMimeType, string $targetMimeType): ?IConversionProvider {
+		$validProvider = null;
+		foreach ($this->getProviders() as $provider) {
+			$suitableMimeTypes = array_filter(
+				$provider->getSupportedMimeTypes(),
+				function (ConversionMimeTuple $mimeTuple) use ($fileMimeType, $targetMimeType) {
+					['from' => $from, 'to' => $to] = $mimeTuple->jsonSerialize();
+					
+					return ($from === $fileMimeType) && array_key_exists($targetMimeType, $to);
+				}
+			);
+
+			if (!empty($suitableMimeTypes)) {
+				$validProvider = $provider;
+				break;
+			}
+		}
+
+		return $validProvider;
+	}
 }

lib/public/Files/Conversion/IConversionProvider.php

@@ -19,11 +19,13 @@
  */
 interface IConversionProvider {
 	/**
-	 * Get the MIME type tuple this conversion provider supports
+	 * Get an array of MIME type tuples this conversion provider supports
+	 *
+	 * @return list<ConversionMimeTuple>
 	 *
 	 * @since 31.0.0
 	 */
-	public function getSupportedMimeType(): ConversionMimeTuple;
+	public function getSupportedMimeTypes(): array;
 
 	/**
 	 * Convert a file to a given MIME type