feat: Added blurhash to image metadata

Signed-off-by: skalidindi53 <s.teja2004@gmail.com>

Author: skalidindi53

lib/Chat/Parser/SystemMessage.php

@@ -817,6 +817,10 @@ protected function getFileFromShare(Room $room, ?Participant $participant, strin
 					$data['width'] = (string) $sizeMetadata['width'];
 					$data['height'] = (string) $sizeMetadata['height'];
 				}
+
+				if (isset($sizeMetadata['blurhash'])) {
+					$data['blurhash'] = $sizeMetadata['blurhash'];
+				}
 			} catch (FilesMetadataNotFoundException) {
 			}
 		}

lib/ResponseDefinitions.php

@@ -91,6 +91,7 @@
  *     permissions?: string,
  *     width?: string,
  *     height?: string,
+ *     blurhash?: string,
  * }
  *
  * @psalm-type TalkBaseMessage = array{

lib/Share/Helper/FilesMetadataCache.php

@@ -15,7 +15,7 @@
 use OCP\FilesMetadata\Model\IFilesMetadata;
 
 class FilesMetadataCache {
-	/** @var array<int, ?array{width: int, height: int}> */
+	/** @var array<int, ?array{width: int, height: int, blurhash?: string}> */
 	protected array $filesSizeData = [];
 
 	public function __construct(
@@ -41,7 +41,7 @@ public function preloadMetadata(array $fileIds): void {
 	/**
 	 * @param int $fileId
 	 * @return array
-	 * @psalm-return array{width: int, height: int}
+	 * @psalm-return array{width: int, height: int, blurhash?: string}
 	 * @throws FilesMetadataNotFoundException
 	 */
 	public function getMetadataPhotosSizeForFileId(int $fileId): array {
@@ -75,6 +75,12 @@ protected function cachePhotosSize(int $fileId, IFilesMetadata $metadata): void
 					'width' => $sizeMetadata['width'],
 					'height' => $sizeMetadata['height'],
 				];
+
+				// Retrieve Blurhash from metadata (if present)
+				if ($metadata->hasKey('blurhash')) {
+					$dimensions['blurhash'] = $metadata->getString('blurhash');
+				}
+
 				$this->filesSizeData[$fileId] = $dimensions;
 			} else {
 				$this->filesSizeData[$fileId] = null;

tests/php/Chat/Parser/SystemMessageTest.php

@@ -658,6 +658,83 @@ public function testGetFileFromShareForGuest(): void {
 		], self::invokePrivate($parser, 'getFileFromShare', [$room, $participant, '23']));
 	}
 
+	public function testGetFileFromShareForGuestWithBlurhash(): void {
+		$room = $this->createMock(Room::class);
+		$node = $this->createMock(Node::class);
+		$node->expects($this->once())
+			->method('getId')
+			->willReturn(54);
+		$node->expects($this->once())
+			->method('getName')
+			->willReturn('name');
+		$node->expects($this->atLeastOnce())
+			->method('getMimeType')
+			->willReturn('image/png');
+		$node->expects($this->once())
+			->method('getSize')
+			->willReturn(65530);
+		$node->expects($this->once())
+			->method('getEtag')
+			->willReturn(md5('etag'));
+		$node->expects($this->once())
+			->method('getPermissions')
+			->willReturn(27);
+	
+		$share = $this->createMock(IShare::class);
+		$share->expects($this->once())
+			->method('getNode')
+			->willReturn($node);
+		$share->expects($this->once())
+			->method('getToken')
+			->willReturn('token');
+	
+		$this->shareProvider->expects($this->once())
+			->method('getShareById')
+			->with('23')
+			->willReturn($share);
+	
+		$this->url->expects($this->once())
+			->method('linkToRouteAbsolute')
+			->with('files_sharing.sharecontroller.showShare', [
+				'token' => 'token',
+			])
+			->willReturn('absolute-link');
+	
+		$this->previewManager->expects($this->once())
+			->method('isAvailable')
+			->with($node)
+			->willReturn(true);
+	
+		$this->filesMetadataCache->expects($this->once())
+			->method('getMetadataPhotosSizeForFileId')
+			->with(54)
+			->willReturn([
+				'width' => 1234,
+				'height' => 4567,
+				'blurhash' => 'LEHV9uae2yk8pyo0adR*.7kCMdnj'
+			]);
+	
+		$participant = $this->createMock(Participant::class);
+	
+		$parser = $this->getParser();
+		
+		$this->assertSame([
+			'type' => 'file',
+			'id' => '54',
+			'name' => 'name',
+			'size' => '65530',
+			'path' => 'name',
+			'link' => 'absolute-link',
+			'etag' => '1872ade88f3013edeb33decd74a4f947',
+			'permissions' => '27',
+			'mimetype' => 'image/png',
+			'preview-available' => 'yes',
+			'width' => '1234',
+			'height' => '4567',
+			'blurhash' => 'LEHV9uae2yk8pyo0adR*.7kCMdnj',
+		], self::invokePrivate($parser, 'getFileFromShare', [$room, $participant, '23']));
+	}
+
 	public function testGetFileFromShareForOwner(): void {
 		$room = $this->createMock(Room::class);
 		$node = $this->createMock(Node::class);