**
		 * Remove modified data for built-in post type
		 *
		 * @return [type] [description]
		 */
		public function reset_built_in_post_type( $post_type = null ) {

			$this->db->delete(
				$this->table,
				array(
					'slug'   => $post_type,
					'status' => 'built-in',
				),
				array( '%s', '%s' )
			);

			return true;

		}

		/**
		 * Return user-modified built-in post types
		 *
		 * @return [type] [description]
		 */
		public function get_modified_built_in_types() {

			$types = $this->db->query(
				$this->table,
				array(
					'status' => 'built-in',
				)
			);

			if ( ! $types ) {
				return array();
			} else {
				return $types;
			}

		}

		/**
		 * Returns default built-in post type
		 *
		 * @return [type] [description]
		 */
		public function get_default_built_in_post_type( $post_type ) {

			$post_type_object = get_post_type_object( $post_type );

			if ( ! $post_type_object ) {

				$this->parent->add_notice(
					'error',
					__( 'Post type not found', 'jet-engine' )
				);

				return false;
			}

			$post_type_object->labels = (array) $post_type_object->labels;
			$post_type_object         = (array) $post_type_object;

			$_defaults = ! empty( $this->parent->built_in_defaults[ $post_type ] ) ? $this->parent->built_in_defaults[ $post_type ] : false;

			if ( $_defaults ) {
				if ( ! empty( $_defaults['labels'] ) ) {

					$post_type_object['labels'] = array_merge( $post_type_object['labels'], $_defaults['labels'] );

					if ( ! empty( $_defaults['labels']['name'] ) ) {
						$post_type_object['label'] = $_defaults['labels']['name'];
					}

					unset( $_defaults['labels'] );
				}

				if ( ! empty( $_defaults ) ) {
					$post_type_object = array_merge( $post_type_object, $_defaults );
				}

			}

			$post_type_data = array(
				'general_settings' => array(
					'name'             => $post_type_object['label'],
					'slug'             => $post_type_object['name'],
					'custom_storage'   => false,
					'show_edit_link'   => false,
					'hide_field_names' => false,
					'delete_metadata'  => false,
				),
				'labels'        => $post_type_object['labels'],
				'meta_fields'   => array(),
				'admin_columns' => array(),
				'admin_filters' => array(),
			);

			unset( $post_type_object['labels'] );
			unset( $post_type_object['cap'] );
			unset( $post_type_object['label'] );
			unset( $post_type_object['name'] );

			$supports = get_all_post_type_supports( $post_type );
			$supports = array_filter( $supports );
			$supports = array_keys( $supports );

			$post_type_object['supports'] = $supports;

			$post_type_data['advanced_settings'] = $post_type_object;

			return $post_type_data;

		}

		/**
		 * Maybe delete metadata on update item
		 */
		public function delete_metadata_on_update( $item = array() ) {

			$args = ! empty( $item['args'] ) ? $item['args'] : array();

			if ( empty( $args['delete_metadata'] ) ) {
				return;
			}

			if ( empty( $item['id'] ) ) {
				return;
			}

			$prev_item = $this->get_item_for_edit( $item['id'] );

			if ( ! $prev_item ) {
				return;
			}

			$prev_meta_fields = ! empty( $prev_item['meta_fields'] ) ? $prev_item['meta_fields'] : array();
			$new_meta_fields  = ! empty( $item['meta_fields'] ) ? $item['meta_fields'] : array();

			if ( empty( $prev_meta_fields ) ) {
				return;
			}

			$prev_meta_names = wp_list_pluck( $prev_meta_fields, 'name' );
			$new_meta_names  = wp_list_pluck( $new_meta_fields, 'name' );

			$to_delete = array_diff( $prev_meta_names, $new_meta_names );

			if ( empty( $to_delete ) ) {
				return;
			}

			$this->delete_metadata( $prev_item, $to_delete );
		}

		/**
		 * Delete metadata of CPT
		 */
		public function delete_metadata( $item = null, $keys_to_delete = array(), $on_delete = false ) {

			$args = ! empty( $item['general_settings'] ) ? $item['general_settings'] : array();

			if ( $on_delete && empty( $args['delete_metadata'] ) ) {
				return;
			}

			$meta_fields = ! empty( $item['meta_fields'] ) ? $item['meta_fields'] : array();

			if ( empty( $meta_fields ) ) {
				return;
			}

			$meta_names  = wp_list_pluck( $meta_fields, 'name' );
			$meta_fields = array_combine( $meta_names, $meta_fields );

			if ( $on_delete ) {
				$keys_to_delete = $meta_names;
			}

			$to_delete = array_filter( $keys_to_delete, function ( $name ) use ( $meta_fields ) {

				if ( ! empty( $meta_fields[ $name ]['object_type'] ) && 'field' !== $meta_fields[ $name ]['object_type'] ) {
					return false;
				}

				if ( ! empty( $meta_fields[ $name ]['type'] ) && 'html' === $meta_fields[ $name ]['type'] ) {
					return false;
				}

				return true;
			} );

			if ( empty( $to_delete ) ) {
				return;
			}

			Jet_Engine_Tools::delete_metadata_by_object_where(
				'post',
				$to_delete,
				array(
					'post_type' => $args['slug'],
				)
			);

		}

	}

}