WP_REST_Global_Styles_Controller::prepare_item_for_database( WP_REST_Request $request ): stdClass|WP_Error

238	protected function prepare_item_for_database( $request ) {239		$changes     = new stdClass();240		$changes->ID = $request['id'];241 242		$post            = get_post( $request['id'] );243		$existing_config = array();244		if ( $post ) {245			$existing_config     = json_decode( $post->post_content, true );246			$json_decoding_error = json_last_error();247			if ( JSON_ERROR_NONE !== $json_decoding_error || ! isset( $existing_config['isGlobalStylesUserThemeJSON'] ) ||248				! $existing_config['isGlobalStylesUserThemeJSON'] ) {249				$existing_config = array();250			}251		}252 253		if ( isset( $request['styles'] ) || isset( $request['settings'] ) ) {254			$config = array();255			if ( isset( $request['styles'] ) ) {256				if ( isset( $request['styles']['css'] ) ) {257					$css_validation_result = $this->validate_custom_css( $request['styles']['css'] );258					if ( is_wp_error( $css_validation_result ) ) {259						return $css_validation_result;260					}261				}262				$config['styles'] = $request['styles'];263			} elseif ( isset( $existing_config['styles'] ) ) {264				$config['styles'] = $existing_config['styles'];265			}266 267			// Register theme-defined variations e.g. from block style variation partials under `/styles`.268			$variations = WP_Theme_JSON_Resolver::get_style_variations( 'block' );269			wp_register_block_style_variations_from_theme_json_partials( $variations );270 271			if ( isset( $request['settings'] ) ) {272				$config['settings'] = $request['settings'];273			} elseif ( isset( $existing_config['settings'] ) ) {274				$config['settings'] = $existing_config['settings'];275			}276			$config['isGlobalStylesUserThemeJSON'] = true;277			$config['version']                     = WP_Theme_JSON::LATEST_SCHEMA;278			/**279			 * JSON encode the data stored in post content.280			 * Escape characters that are likely to be mangled by HTML filters: "<>&".281			 *282			 * This data is later re-encoded by {@see wp_filter_global_styles_post()}.283			 * The escaping is also applied here as a precaution.284			 */285			$changes->post_content = wp_json_encode( $config, JSON_UNESCAPED_SLASHES | JSON_HEX_TAG | JSON_HEX_AMP );286		}287 288		// Post title.289		if ( isset( $request['title'] ) ) {290			if ( is_string( $request['title'] ) ) {291				$changes->post_title = $request['title'];292			} elseif ( ! empty( $request['title']['raw'] ) ) {293				$changes->post_title = $request['title']['raw'];294			}295		}296 297		return $changes;298	}