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<?php /** * Class Google\Site_Kit\Core\Storage * * @package Google\Site_Kit\Core\Storage * @copyright 2021 Google LLC * @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0 * @link https://sitekit.withgoogle.com */ namespace Google\Site_Kit\Core\Storage; /** * Base class for a single setting. * * @since 1.2.0 * @access private * @ignore */ abstract class Setting { /** * The option_name for this setting. * Override in a sub-class. */ const OPTION = ''; /** * Options instance implementing Options_Interface. * * @since 1.2.0 * @var Options_Interface */ protected $options; /** * Setting constructor. * * @since 1.2.0 * * @param Options_Interface $options Options_Interface instance. */ public function __construct( Options_Interface $options ) { $this->options = $options; } /** * Registers the setting in WordPress. * * @since 1.2.0 */ public function register() { register_setting( static::OPTION, static::OPTION, array( 'type' => $this->get_type(), 'sanitize_callback' => $this->get_sanitize_callback(), 'default' => $this->get_default(), ) ); } /** * Subscribes to updates for this setting. * * @since 1.118.0 * * @param callable $callback Function taking $old_value & $new_value parameters that gets called when option value updates. * @return \Closure Function to remove added listeners. */ public function on_change( callable $callback ) { $option = static::OPTION; $on_add_option = function ( $_, $value ) use ( $callback ) { $callback( $this->get_default(), $value ); }; add_action( "add_option_{$option}", $on_add_option, 10, 2 ); $on_update_option = function ( $old_value, $value ) use ( $callback ) { $callback( $old_value, $value ); }; add_action( "update_option_{$option}", $on_update_option, 10, 2 ); return function () use ( $option, $on_add_option, $on_update_option ) { remove_action( "add_option_{$option}", $on_add_option ); remove_action( "update_option_{$option}", $on_update_option ); }; } /** * Checks whether or not the option is set with a valid value. * * @since 1.2.0 * @since 1.3.0 Now relies on {@see Options_Interface::has()}. * * @return bool True on success, false on failure. */ public function has() { return $this->options->has( static::OPTION ); } /** * Gets the value of the setting. * * @since 1.2.0 * * @return mixed Value set for the option, or registered default if not set. */ public function get() { return $this->options->get( static::OPTION ); } /** * Sets the value of the setting with the given value. * * @since 1.2.0 * * @param mixed $value Setting value. Must be serializable if non-scalar. * * @return bool True on success, false on failure. */ public function set( $value ) { return $this->options->set( static::OPTION, $value ); } /** * Deletes the setting. * * @since 1.2.0 * * @return bool True on success, false on failure. */ public function delete() { return $this->options->delete( static::OPTION ); } /** * Gets the expected value type. * * Returns 'string' by default for consistency with register_setting. * Override in a sub-class if different. * * @since 1.2.0 * * @return string The type name. */ protected function get_type() { return 'string'; } /** * Gets the default value. * * For use with register_setting and fetching the default directly. * Returns false by default for consistency with get_option. * Override in a sub-class if different. * * @since 1.2.0 * * @return mixed The default value. */ protected function get_default() { return false; } /** * Gets the callback for sanitizing the setting's value before saving. * * For use internally with register_setting. * Returns `null` for consistency with the default in register_setting. * Override in a sub-class. * * @since 1.2.0 * * @return callable|null */ protected function get_sanitize_callback() { return null; } }
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