When a user is removed from the Readers list for a paper, force unfol…

…low.

See #7.

includes/class-cacsp-paper.php

@@ -247,6 +247,16 @@ public function remove_reader( $user_id ) {
 
 		$this->reader_ids = null;
 
+		if ( true === $removed ) {
+			/**
+			 * Fires when a reader has been removed from a paper.
+			 *
+			 * @param CACSP_Paper $paper   Paper object.
+			 * @param int         $user_id ID of the user removed.
+			 */
+			do_action( 'cacsp_removed_reader_from_paper', $this, $user_id );
+		}
+
 		return $removed;
 	}
 

includes/hooks-buddypress-follow.php

@@ -10,6 +10,7 @@
 
 add_action( 'bp_activity_post_type_published', 'cacsp_auto_follow_on_new_paper', 10, 3 );
 //add_action( 'cacsp_added_reader_to_paper',     'cacsp_auto_follow_for_new_reader', 10, 2 );
+add_action( 'cacsp_removed_reader_from_paper', 'cacsp_unfollow_for_removed_reader', 10, 2 );
 
 /**
  * Automatically provision users to follow their own written paper.
@@ -70,6 +71,26 @@ function cacsp_auto_follow_for_new_reader( $paper, $user_id ) {
 	) );
 }
 
+/**
+ * Unfollow a user from a paper when the user is removed from the Readers list.
+ *
+ * @since 1.0.0
+ *
+ * @param CACSP_Paper $paper
+ * @param int         $user_id
+ */
+function cacsp_unfollow_for_removed_reader( $paper, $user_id ) {
+	if ( empty( $user_id ) ) {
+		return;
+	}
+
+	bp_follow_stop_following( array(
+		'leader_id'   => cacsp_follow_get_activity_id( $paper->id ),
+		'follower_id' => $user_id,
+		'follow_type' => 'cacsp_paper'
+	) );
+}
+
 /** NOTIFICATIONS ********************************************************/
 
 add_filter( 'cacsp_custom_notification_format', 'cacsp_follow_format_notifications', 10, 2 );