You've already forked wp-fedistream
416 lines
11 KiB
PHP
416 lines
11 KiB
PHP
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<?php
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/**
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* Outbox handler for ActivityPub.
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*
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* @package WP_FediStream
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*/
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namespace WP_FediStream\ActivityPub;
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// Prevent direct file access.
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* Handles publishing activities to followers.
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*/
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class Outbox {
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/**
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* The follower handler.
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*
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* @var FollowerHandler
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*/
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private FollowerHandler $follower_handler;
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/**
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* Constructor.
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*/
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public function __construct() {
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$this->follower_handler = new FollowerHandler();
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// Hook into post publishing.
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add_action( 'transition_post_status', array( $this, 'on_post_status_change' ), 10, 3 );
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// Hook into post update.
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add_action( 'post_updated', array( $this, 'on_post_updated' ), 10, 3 );
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}
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/**
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* Handle post status changes.
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*
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* @param string $new_status The new post status.
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* @param string $old_status The old post status.
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* @param \WP_Post $post The post object.
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* @return void
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*/
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public function on_post_status_change( string $new_status, string $old_status, \WP_Post $post ): void {
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// Only handle FediStream post types.
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if ( ! in_array( $post->post_type, array( 'fedistream_track', 'fedistream_album', 'fedistream_playlist' ), true ) ) {
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return;
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}
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// Check if publishing is enabled for this post.
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$enabled = get_post_meta( $post->ID, '_fedistream_activitypub_publish', true );
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if ( ! $enabled && $enabled !== '' ) {
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// Default to enabled for new posts.
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if ( $old_status === 'new' || $old_status === 'auto-draft' ) {
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update_post_meta( $post->ID, '_fedistream_activitypub_publish', '1' );
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$enabled = '1';
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} else {
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return;
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}
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}
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// Publish on status change to 'publish'.
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if ( 'publish' === $new_status && 'publish' !== $old_status ) {
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$this->publish_create( $post );
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}
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}
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/**
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* Handle post updates.
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*
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* @param int $post_id The post ID.
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* @param \WP_Post $post_after The post object after update.
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* @param \WP_Post $post_before The post object before update.
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* @return void
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*/
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public function on_post_updated( int $post_id, \WP_Post $post_after, \WP_Post $post_before ): void {
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// Only handle published FediStream post types.
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if ( $post_after->post_status !== 'publish' ) {
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return;
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}
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if ( ! in_array( $post_after->post_type, array( 'fedistream_track', 'fedistream_album', 'fedistream_playlist' ), true ) ) {
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return;
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}
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// Check if already published to ActivityPub.
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$published = get_post_meta( $post_id, '_fedistream_activitypub_published', true );
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if ( ! $published ) {
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return;
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}
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// Check if update publishing is enabled.
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$publish_updates = get_post_meta( $post_id, '_fedistream_activitypub_publish_updates', true );
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if ( ! $publish_updates ) {
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return;
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}
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// Only publish updates for significant changes.
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if ( $this->has_significant_changes( $post_before, $post_after ) ) {
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$this->publish_update( $post_after );
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}
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}
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/**
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* Check if a post has significant changes.
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*
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* @param \WP_Post $before The post before update.
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* @param \WP_Post $after The post after update.
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* @return bool
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*/
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private function has_significant_changes( \WP_Post $before, \WP_Post $after ): bool {
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// Check title change.
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if ( $before->post_title !== $after->post_title ) {
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return true;
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}
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// Check content change.
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if ( $before->post_content !== $after->post_content ) {
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return true;
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}
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// Check for audio file change (tracks).
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if ( 'fedistream_track' === $after->post_type ) {
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$audio_before = get_post_meta( $after->ID, '_fedistream_audio_file_previous', true );
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$audio_after = get_post_meta( $after->ID, '_fedistream_audio_file', true );
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if ( $audio_before !== $audio_after ) {
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return true;
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}
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}
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return false;
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}
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/**
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* Publish a Create activity for a post.
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*
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* @param \WP_Post $post The post to publish.
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* @return bool True on success.
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*/
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public function publish_create( \WP_Post $post ): bool {
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$transformer = $this->get_transformer( $post );
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if ( ! $transformer ) {
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return false;
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}
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$activity = $transformer->to_create_activity();
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// Get the artist for this content.
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$artist_id = $this->get_artist_for_post( $post );
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if ( ! $artist_id ) {
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return false;
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}
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// Broadcast to followers.
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$results = $this->follower_handler->broadcast_activity( $artist_id, $activity );
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// Mark as published.
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update_post_meta( $post->ID, '_fedistream_activitypub_published', current_time( 'mysql' ) );
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// Log results.
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$success_count = count( array_filter( $results ) );
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$total_count = count( $results );
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do_action( 'fedistream_activitypub_published', $post->ID, $success_count, $total_count );
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return $success_count > 0 || $total_count === 0;
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}
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/**
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* Publish an Update activity for a post.
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*
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* @param \WP_Post $post The post to update.
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* @return bool True on success.
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*/
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public function publish_update( \WP_Post $post ): bool {
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$transformer = $this->get_transformer( $post );
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if ( ! $transformer ) {
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return false;
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}
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// Build Update activity.
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$object = $transformer->to_object();
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$actor = $transformer->get_attributed_to();
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$actor = is_array( $actor ) ? $actor[0] : $actor;
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$activity = array(
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'type' => 'Update',
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'id' => get_permalink( $post->ID ) . '#activity-update-' . time(),
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'actor' => $actor,
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'published' => gmdate( 'c' ),
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'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
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'cc' => array( $actor . '/followers' ),
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'object' => $object,
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);
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// Get the artist for this content.
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$artist_id = $this->get_artist_for_post( $post );
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if ( ! $artist_id ) {
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return false;
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}
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// Broadcast to followers.
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$results = $this->follower_handler->broadcast_activity( $artist_id, $activity );
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// Update timestamp.
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update_post_meta( $post->ID, '_fedistream_activitypub_updated', current_time( 'mysql' ) );
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$success_count = count( array_filter( $results ) );
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return $success_count > 0 || count( $results ) === 0;
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}
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/**
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* Publish an Announce (boost) activity.
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*
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* @param int $artist_id The artist ID doing the announcing.
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* @param string $object_uri The object URI to announce.
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* @return bool True on success.
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*/
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public function publish_announce( int $artist_id, string $object_uri ): bool {
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$artist = get_post( $artist_id );
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if ( ! $artist || 'fedistream_artist' !== $artist->post_type ) {
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return false;
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}
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$actor = new ArtistActor( $artist );
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$activity = array(
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'type' => 'Announce',
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'id' => $actor->get_id() . '#announce-' . time(),
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'actor' => $actor->get_id(),
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'published' => gmdate( 'c' ),
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'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
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'cc' => array( $actor->get_followers() ),
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'object' => $object_uri,
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);
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// Broadcast to followers.
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$results = $this->follower_handler->broadcast_activity( $artist_id, $activity );
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return count( array_filter( $results ) ) > 0 || count( $results ) === 0;
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}
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/**
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* Publish a Delete activity for a post.
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*
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* @param \WP_Post $post The post being deleted.
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* @return bool True on success.
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*/
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public function publish_delete( \WP_Post $post ): bool {
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// Check if was published to ActivityPub.
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$published = get_post_meta( $post->ID, '_fedistream_activitypub_published', true );
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if ( ! $published ) {
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return false;
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}
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$actor = $this->get_attributed_to( $post );
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if ( ! $actor ) {
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return false;
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}
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$activity = array(
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'type' => 'Delete',
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'id' => get_permalink( $post->ID ) . '#activity-delete-' . time(),
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'actor' => $actor,
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'published' => gmdate( 'c' ),
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'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
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'object' => array(
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'type' => 'Tombstone',
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'id' => get_permalink( $post->ID ),
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),
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);
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// Get the artist for this content.
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$artist_id = $this->get_artist_for_post( $post );
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if ( ! $artist_id ) {
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return false;
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}
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// Broadcast to followers.
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$results = $this->follower_handler->broadcast_activity( $artist_id, $activity );
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return count( array_filter( $results ) ) > 0 || count( $results ) === 0;
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}
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/**
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* Get the appropriate transformer for a post.
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*
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* @param \WP_Post $post The post.
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* @return TrackTransformer|AlbumTransformer|PlaylistTransformer|null
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*/
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private function get_transformer( \WP_Post $post ) {
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switch ( $post->post_type ) {
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case 'fedistream_track':
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return new TrackTransformer( $post );
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case 'fedistream_album':
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return new AlbumTransformer( $post );
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case 'fedistream_playlist':
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return new PlaylistTransformer( $post );
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default:
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return null;
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}
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}
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/**
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* Get the artist ID associated with a post.
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*
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* @param \WP_Post $post The post.
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* @return int|null
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*/
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private function get_artist_for_post( \WP_Post $post ): ?int {
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switch ( $post->post_type ) {
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case 'fedistream_track':
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$artist_ids = get_post_meta( $post->ID, '_fedistream_artist_ids', true );
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if ( is_array( $artist_ids ) && ! empty( $artist_ids ) ) {
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return absint( $artist_ids[0] );
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}
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// Fall back to album artist.
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$album_id = get_post_meta( $post->ID, '_fedistream_album_id', true );
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if ( $album_id ) {
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return absint( get_post_meta( $album_id, '_fedistream_album_artist', true ) );
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}
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break;
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case 'fedistream_album':
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$artist_id = get_post_meta( $post->ID, '_fedistream_album_artist', true );
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return $artist_id ? absint( $artist_id ) : null;
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case 'fedistream_playlist':
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// For playlists, try to find an artist owned by the author.
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$artist_args = array(
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'post_type' => 'fedistream_artist',
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'posts_per_page' => 1,
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'author' => $post->post_author,
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);
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$artists = get_posts( $artist_args );
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if ( ! empty( $artists ) ) {
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return $artists[0]->ID;
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}
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break;
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}
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return null;
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}
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/**
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* Get the attributed actor for a post.
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*
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* @param \WP_Post $post The post.
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* @return string|null Actor URI.
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*/
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private function get_attributed_to( \WP_Post $post ): ?string {
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$artist_id = $this->get_artist_for_post( $post );
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if ( $artist_id ) {
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return get_permalink( $artist_id );
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}
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return null;
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}
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/**
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* Manually trigger publication for a post.
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*
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* @param int $post_id The post ID.
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* @return bool True on success.
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|
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*/
|
||
|
|
public function manual_publish( int $post_id ): bool {
|
||
|
|
$post = get_post( $post_id );
|
||
|
|
|
||
|
|
if ( ! $post || 'publish' !== $post->post_status ) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check if already published.
|
||
|
|
$published = get_post_meta( $post_id, '_fedistream_activitypub_published', true );
|
||
|
|
|
||
|
|
if ( $published ) {
|
||
|
|
return $this->publish_update( $post );
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->publish_create( $post );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the outbox collection for an artist.
|
||
|
|
*
|
||
|
|
* @param int $artist_id The artist ID.
|
||
|
|
* @param int $page The page number (0 for summary).
|
||
|
|
* @param int $per_page Items per page.
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function get_collection( int $artist_id, int $page = 0, int $per_page = 20 ): array {
|
||
|
|
$artist = get_post( $artist_id );
|
||
|
|
if ( ! $artist || 'fedistream_artist' !== $artist->post_type ) {
|
||
|
|
return array();
|
||
|
|
}
|
||
|
|
|
||
|
|
$actor = new ArtistActor( $artist );
|
||
|
|
|
||
|
|
return $actor->get_outbox_collection( $page, $per_page );
|
||
|
|
}
|
||
|
|
}
|