Merge pull request #203 from rtCamp/feature/add-wildcard-keys-deletion

Add wildcard cache key deletion for device type cache purge

Author: pradeep910

admin/class-phpredis-purger.php

@@ -120,12 +120,44 @@ public function purge_url( $url, $feed = true ) {
 
 		$prefix          = $nginx_helper_admin->options['redis_prefix'];
 		$_url_purge_base = $prefix . $parse['scheme'] . 'GET' . $parse['host'] . $parse['path'];
-		$is_purged       = $this->delete_single_key( $_url_purge_base );
 
-		if ( $is_purged ) {
-			$this->log( '- Purged URL | ' . $url );
+		/**
+		 * To delete device type caches such as `<URL>--mobile`, `<URL>--desktop`, `<URL>--lowend`, etc.
+		 * This would need $url above to be changed with this filter `rt_nginx_helper_purge_url` by cache key that Nginx sets while generating cache.
+		 *
+		 * For example: If page is accessed from desktop, then cache will be generated by appending `--desktop` to current URL.
+		 * Add this filter in separate plugin or simply in theme's function.php file:
+		 * ```
+		 * add_filter( 'rt_nginx_helper_purge_url', function( $url ) {
+		 *      $url = $url . '--*';
+		 *      return $url;
+		 * });
+		 * ```
+		 *
+		 * Regardless of what key / suffix is being to store `$device_type` cache , it will be deleted.
+		 *
+		 * @since 2.1.0
+		 */
+		if ( strpos( $_url_purge_base, '*' ) === false ) {
+
+			$status = $this->delete_single_key( $_url_purge_base );
+
+			if ( $status ) {
+				$this->log( '- Purge URL | ' . $_url_purge_base );
+			} else {
+				$this->log( '- Cache Not Found | ' . $_url_purge_base, 'ERROR' );
+			}
+
 		} else {
-			$this->log( '- Cache Not Found | ' . $url, 'ERROR' );
+
+			$status = $this->delete_keys_by_wildcard( $_url_purge_base );
+
+			if ( $status ) {
+				$this->log( '- Purge Wild Card URL | ' . $_url_purge_base . ' | ' . $status . ' url purged' );
+			} else {
+				$this->log( '- Cache Not Found | ' . $_url_purge_base, 'ERROR' );
+			}
+
 		}
 
 		$this->log( '* * * * *' );

admin/class-predis-purger.php

@@ -119,7 +119,45 @@ public function purge_url( $url, $feed = true ) {
 
 		$prefix          = $nginx_helper_admin->options['redis_prefix'];
 		$_url_purge_base = $prefix . $parse['scheme'] . 'GET' . $parse['host'] . $parse['path'];
-		$this->delete_single_key( $_url_purge_base );
+
+		/**
+		 * To delete device type caches such as `<URL>--mobile`, `<URL>--desktop`, `<URL>--lowend`, etc.
+		 * This would need $url above to be changed with this filter `rt_nginx_helper_purge_url` by cache key that Nginx sets while generating cache.
+		 *
+		 * For example: If page is accessed from desktop, then cache will be generated by appending `--desktop` to current URL.
+		 * Add this filter in separate plugin or simply in theme's function.php file:
+		 * ```
+		 * add_filter( 'rt_nginx_helper_purge_url', function( $url ) {
+		 *      $url = $url . '--*';
+		 *      return $url;
+		 * });
+		 * ```
+		 *
+		 * Regardless of what key / suffix is being to store `$device_type` cache , it will be deleted.
+		 *
+		 * @since 2.1.0
+		 */
+		if ( strpos( $_url_purge_base, '*' ) === false ) {
+
+			$status = $this->delete_single_key( $_url_purge_base );
+
+			if ( $status ) {
+				$this->log( '- Purge URL | ' . $_url_purge_base );
+			} else {
+				$this->log( '- Cache Not Found | ' . $_url_purge_base, 'ERROR' );
+			}
+
+		} else {
+
+			$status = $this->delete_keys_by_wildcard( $_url_purge_base );
+
+			if ( $status ) {
+				$this->log( '- Purge Wild Card URL | ' . $_url_purge_base . ' | ' . $status . ' url purged' );
+			} else {
+				$this->log( '- Cache Not Found | ' . $_url_purge_base, 'ERROR' );
+			}
+
+		}
 
 	}