Introduce method to purge excess revisions

inc/class-wp-revisions-control-bulk-actions.php

@@ -16,6 +16,13 @@ class WP_Revisions_Control_Bulk_Actions {
 	 */
 	protected $post_types;
 
+	/**
+	 * Base for bulk action names.
+	 *
+	 * @var string
+	 */
+	protected $action_base = 'wp_rev_ctl_bulk_';
+
 	/**
 	 * Custom bulk actions.
 	 *
@@ -43,11 +50,10 @@ class WP_Revisions_Control_Bulk_Actions {
 	 * Register custom actions.
 	 */
 	protected function register_actions() {
-		$actions     = array();
-		$action_base = 'wp_rev_ctl_bulk_';
+		$actions = array();
 
-		$actions[ $action_base . 'purge_excess' ] = __( 'Purge excess revisions', 'wp_revisions_control' );
-		$actions[ $action_base . 'purge_all' ]    = __( 'Purge ALL revisions', 'wp_revisions_control' );
+		$actions[ $this->action_base . 'purge_excess' ] = __( 'Purge excess revisions', 'wp_revisions_control' );
+		$actions[ $this->action_base . 'purge_all' ]    = __( 'Purge ALL revisions', 'wp_revisions_control' );
 
 		$this->actions = $actions;
 	}
@@ -74,6 +80,7 @@ class WP_Revisions_Control_Bulk_Actions {
 
 		add_filter( 'bulk_actions-' . $screen->id, array( $this, 'add_actions' ) );
 		add_filter( 'handle_bulk_actions-' . $screen->id, array( $this, 'handle_action' ), 10, 3 );
+		// TODO: messages.
 	}
 
 	/**
@@ -99,7 +106,44 @@ class WP_Revisions_Control_Bulk_Actions {
 			return $redirect_to;
 		}
 
+		$action = str_replace( $this->action_base, '', $action );
+
+		switch ( $action ) {
+			case 'purge_all':
+				$this->purge_all( $ids );
+				break;
+
+			case 'purge_excess':
+				$this->purge_excess( $ids );
+				break;
+
+			default:
+				break;
+		}
+
 		// TODO: implement and add a query string to trigger a message.
 		return $redirect_to;
 	}
+
+	/**
+	 * Remove all revisions from the given IDs.
+	 *
+	 * @param array $ids Object IDs.
+	 */
+	protected function purge_all( $ids ) {
+		foreach ( $ids as $id ) {
+			WP_Revisions_Control::get_instance()->do_purge_all( $id );
+		}
+	}
+
+	/**
+	 * Remove excess revisions from the given IDs.
+	 *
+	 * @param array $ids Object IDs.
+	 */
+	protected function purge_excess( $ids ) {
+		foreach ( $ids as $id ) {
+			WP_Revisions_Control::get_instance()->do_purge_excess( $id );
+		}
+	}
 }

inc/class-wp-revisions-control.php

@@ -410,6 +410,50 @@ class WP_Revisions_Control {
 		return $response;
 	}
 
+	/**
+	 * Remove any revisions in excess of a post's limit.
+	 *
+	 * @param int $post_id Post ID to purge of excess revisions.
+	 * @return array
+	 */
+	public function do_purge_excess( $post_id ) {
+		$response = array(
+			'count' => 0,
+		);
+
+		$to_keep = wp_revisions_to_keep( get_post( $post_id ) );
+
+		if ( $to_keep < 0 ) {
+			$response['success'] = __(
+				'No revisions to remove.',
+				'wp_revisions_control'
+			);
+
+			return $response;
+		}
+
+		$revisions      = wp_get_post_revisions( $post_id );
+		$starting_count = count( $revisions );
+
+		if ( $starting_count <= $to_keep ) {
+			$response['success'] = __(
+				'No revisions to remove.',
+				'wp_revisions_control'
+			);
+
+			return $response;
+		}
+
+		$to_remove         = array_slice( $revisions, $to_keep, null, true );
+		$response['count'] = count( $to_remove );
+
+		foreach ( $to_remove as $revision ) {
+			wp_delete_post_revision( $revision->ID );
+		}
+
+		return $response;
+	}
+
 	/**
 	 * Sanitize and store post-specifiy revisions quantity.
 	 *