Add featured image support to Social Web reader

includes/class-attachments.php

@@ -182,6 +182,15 @@ private static function import_files_for_object( $attachments, $object_id, $obje
 			self::append_files_to_content( $object_id, $files, $object_type );
 		}
 
+		// Add inline mappings to the returned files.
+		// phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable -- We only need the new URL, not the old one.
+		foreach ( $inline_mappings as $old_url => $new_url ) {
+			$files[] = array(
+				'url'       => $new_url,
+				'mime_type' => 'image/*',
+			);
+		}
+
 		return $files;
 	}
 

includes/class-post-types.php

@@ -406,6 +406,17 @@ public static function register_post_post_type() {
 				'sanitize_callback' => 'absint',
 			)
 		);
+
+		\register_post_meta(
+			Posts::POST_TYPE,
+			'_activitypub_featured_image_url',
+			array(
+				'type'              => 'string',
+				'single'            => true,
+				'description'       => 'URL of the featured image from ActivityPub attachments.',
+				'sanitize_callback' => 'sanitize_url',
+			)
+		);
 	}
 
 	/**
@@ -691,6 +702,27 @@ public static function register_ap_post_actor_rest_field() {
 				),
 			)
 		);
+
+		\register_rest_field(
+			Posts::POST_TYPE,
+			'featured_image',
+			array(
+				/**
+				 * Get the featured image for an ap_post.
+				 *
+				 * @param array $response Prepared response array.
+				 * @return string|null The image URL or null if not found.
+				 */
+				'get_callback' => function ( $response ) {
+					return \get_post_meta( $response['id'], '_activitypub_featured_image_url', true ) ?: null;
+				},
+				'schema'       => array(
+					'description' => 'Featured image URL from ActivityPub attachments',
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+				),
+			)
+		);
 	}
 
 	/**