WPCOM Comments: Clear cache when liking/unliking a comment

Author: ebinnion

projects/packages/jetpack-mu-wpcom/src/features/wpcom-comments/class-wp-rest-comment-like.php

@@ -73,6 +73,9 @@ public function new_like( WP_REST_Request $request ) {
 		$comment_id = $request->get_param( 'comment_id' );
 		$blog_id    = \Jetpack_Options::get_option( 'id' );
 
+		$cache_key = WPCom_Comments_Likes::get_cache_key( $comment_id, get_current_user_id() );
+		delete_transient( $cache_key );
+
 		// Call WPCom remote API to record a new like.
 		$response = \Automattic\Jetpack\Connection\Client::wpcom_json_api_request_as_user(
 			"/sites/$blog_id/comments/$comment_id/likes/new",
@@ -96,6 +99,9 @@ public function delete_like( WP_REST_Request $request ) {
 		$comment_id = $request->get_param( 'comment_id' );
 		$blog_id    = \Jetpack_Options::get_option( 'id' );
 
+		$cache_key = WPCom_Comments_Likes::get_cache_key( $comment_id, get_current_user_id() );
+		delete_transient( $cache_key );
+
 		// Call WPCom remote API to delete the current user's like.
 		$response = \Automattic\Jetpack\Connection\Client::wpcom_json_api_request_as_user(
 			"/sites/$blog_id/comments/$comment_id/likes/mine/delete",

projects/packages/jetpack-mu-wpcom/src/features/wpcom-comments/wpcom-comments.php

@@ -94,7 +94,7 @@ private function is_comment_likes_enabled() {
 	 * @param int $user_id    The user ID.
 	 * @return string The cache key.
 	 */
-	private function get_cache_key( $comment_id, $user_id ) {
+	public static function get_cache_key( $comment_id, $user_id ) {
 		return "comment_like_{$comment_id}_{$user_id}";
 	}
 
@@ -107,7 +107,7 @@ private function get_cache_key( $comment_id, $user_id ) {
 	 * @return bool|WP_Error True if the comment is liked, false otherwise, or a WP_Error if the request fails.
 	 */
 	private function do_comment_like_api_request( $blog_id, $user_id, $comment_id ) {
-		$cache_key = $this->get_cache_key( $comment_id, $user_id );
+		$cache_key = self::get_cache_key( $comment_id, $user_id );
 
 		$cached_result = get_transient( $cache_key );