Store incoming blurhash values / display blurhash as preview

src/Module/Photo.php

@@ -272,6 +272,12 @@ class Photo extends BaseApi
 					$height = $media['height'];
 				}
 
+				if (empty($url) && isset($media['blurhash']) && isset($media['width']) && isset($media['height'])) {
+					$image = new Image('', image_type_to_mime_type(IMAGETYPE_WEBP));
+					$image->getFromBlurHash($media['blurhash'], $media['width'], $media['height']);
+					return MPhoto::createPhotoForImageData($image->asString());
+				}
+
 				if (empty($url)) {
 					return false;
 				}

src/Protocol/ActivityPub/Processor.php

@@ -152,6 +152,7 @@ class Processor
 		$data['height']        = $attachment['height']        ?? null;
 		$data['width']         = $attachment['width']         ?? null;
 		$data['size']          = $attachment['size']          ?? null;
+		$data['blurhash']      = $attachment['blurhash']      ?? null;
 		$data['preview']       = $attachment['image']         ?? null;
 		$data['description']   = $attachment['name']          ?? null;
 		$data['player-url']    = $attachment['player-url']    ?? null;

src/Protocol/ActivityPub/Receiver.php

@@ -1677,6 +1677,7 @@ class Receiver
 						'name'      => JsonLD::fetchElement($attachment, 'as:name', '@value'),
 						'url'       => $imageFullUrl,
 						'image'     => $imagePreviewUrl !== $imageFullUrl ? $imagePreviewUrl : null,
+						'blurhash'  => JsonLD::fetchElement($attachment, 'toot:blurhash', '@value'),
 					];
 					break;
 				default:
@@ -1693,6 +1694,7 @@ class Receiver
 						'height'    => JsonLD::fetchElement($attachment, 'as:height', '@value'),
 						'width'     => JsonLD::fetchElement($attachment, 'as:width', '@value'),
 						'image'     => JsonLD::fetchElement($attachment, 'as:image', '@id') ?? $icon,
+						'blurhash'  => JsonLD::fetchElement($attachment, 'toot:blurhash', '@value'),
 					];
 			}
 		}