Use incoming tags as WordPress tags so that you can filter incoming p…

…osts by tag
akirk · May 31, 2023 · 188ce66 · 188ce66
1 parent 2169ac7
commit 188ce66
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diff --git a/feed-parsers/class-feed-item.php b/feed-parsers/class-feed-item.php
@@ -140,6 +140,10 @@ public function __set( $key, $value ) {
 				$value = $this->validate_post_status( $value );
 				break;
 
+			case 'tags':
+				$value = $this->validate_tags( $value );
+				break;
+
 			case 'date':
 				$value = $this->validate_date( $value, 'invalid-date' );
 				break;
@@ -293,6 +297,42 @@ public function validate_post_status( $status ) {
 		return $status;
 	}
 
+	/**
+	 * Validate a given post status.
+	 *
+	 * @param      string|array $tags  The tags.
+	 *
+	 * @return     string|\WP_Error  The validated status.
+	 */
+	public function validate_tags( $tags ) {
+		if ( ! is_array( $tags ) ) {
+			if ( ! is_string( $tags ) ) {
+				return new \WP_Error( 'invalid-tags', 'The tags need to be a hashtag string or an array.' );
+			}
+			if ( false !== strpos( $tags, '#' ) ) {
+				$tags = explode( '#', $tags );
+			} elseif ( false !== strpos( $tags, ',' ) ) {
+				$tags = explode( ',', $tags );
+			} else {
+				$tags = array( $tags );
+			}
+		}
+
+		$validated_tags = array();
+		foreach ( $tags as $tag ) {
+			if ( ! is_string( $tag ) ) {
+				continue;
+			}
+			$tag = mb_substr( trim( ltrim( trim( $tag ), '#,' ) ), 0, 50 );
+			if ( ! $tag ) {
+				continue;
+			}
+			$validated_tags[ $tag ] = true;
+		}
+
+		return array_keys( $validated_tags );
+	}
+
 	/**
 	 * Determines if the item is new.
 	 *

diff --git a/includes/class-feed.php b/includes/class-feed.php
@@ -61,6 +61,7 @@ private function register_hooks() {
 		add_filter( 'pre_option_rss_use_excerpt', array( $this, 'feed_use_excerpt' ), 90 );
 		add_filter( 'friends_early_modify_feed_item', array( $this, 'apply_early_feed_rules' ), 10, 3 );
 		add_filter( 'friends_modify_feed_item', array( $this, 'apply_feed_rules' ), 10, 3 );
+		add_filter( 'friends_modify_feed_item', array( $this, 'extract_tags' ), 10, 3 );
 
 		add_action( 'rss_item', array( $this, 'feed_additional_fields' ) );
 		add_action( 'rss2_item', array( $this, 'feed_additional_fields' ) );
@@ -441,6 +442,16 @@ public function validate_feed_catch_all( $catch_all ) {
 		return $catch_all;
 	}
 
+	public function extract_tags( $item, User_Feed $feed = null, User $friend_user = null ) {
+		// This is a variation of the ACTIVITYPUB_HASHTAGS_REGEXP.
+		if ( \preg_match_all( '/(?:(?<=\s)|(?<=<p>)|(?<=<br\s*/?>)|^)#(\w+)(?:(?=\s|[[:punct:]]|$))/ui', \wp_strip_all_tags( $item->post_content ), $match ) ) {
+			$tags = \implode( ', ', $match[1] );
+			$item->tags = $tags;
+		}
+
+		return $item;
+	}
+
 	/**
 	 * Gets the notification keywords.
 	 *
@@ -627,6 +638,7 @@ public function process_incoming_feed_items( array $items, User_Feed $user_feed
 				$post_data['post_date_gmt'] = $item->date;
 				$post_data['post_content'] = str_replace( '\\', '\\\\', $post_data['post_content'] );
 				$post_data['meta_input'] = $item->meta;
+				$post_data['tags_input'] = $item->tags;
 
 				$post_id = $friend_user->insert_post( $post_data, true );
 				if ( is_wp_error( $post_id ) ) {