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File: class-wp_option.php
<?php
/**
 * TablePress WP Option Wrapper class for WordPress Options
 *
 * Wraps the WordPress Options API, so that (especially) arrays are stored as JSON, instead of being serialized by PHP.
 *
 * @package TablePress
 * @subpackage Classes
 * @author Tobias Bäthge
 * @since 1.0.0
 */

// Prohibit direct script loading.
defined( 'ABSPATH' ) || die( 'No direct script access allowed!' );

/**
 * TablePress WP Option Wrapper class
 * @package TablePress
 * @subpackage Classes
 * @author Tobias Bäthge
 * @since 1.0.0
 */
class TablePress_WP_Option {

	/**
	 * Name/Key of the Option (in its location in the database).
	 *
	 * @since 1.0.0
	 * @var string
	 */
	protected $option_name;

	/**
	 * Current value of the option.
	 *
	 * @since 1.0.0
	 * @var array
	 */
	protected $option_value;

	/**
	 * Initialize with Option Name.
	 *
	 * @since 1.0.0
	 *
	 * @param array $params {
	 *     @type string $option_name   Name of the Option.
	 *     @type array  $default_value Default values for the Option.
	 * }
	 */
	public function __construct( array $params ) {
		$this->option_name = $params['option_name'];

		$option_value = $this->_get_option( $this->option_name, null );
		if ( ! is_null( $option_value ) ) {
			$this->option_value = (array) json_decode( $option_value, true );
		} else {
			$this->option_value = $params['default_value'];
		}
	}

	/**
	 * Check if Option is set.
	 *
	 * @since 1.0.0
	 *
	 * @param string $name Name of the option to check.
	 * @return bool Whether the option is set.
	 */
	public function is_set( $name ) {
		return isset( $this->option_value[ $name ] );
	}

	/**
	 * Get a single Option, or get all Options.
	 *
	 * @since 1.0.0
	 *
	 * @param string|bool $name          Optional. Name of a single option to get, or false for all options.
	 * @param mixed       $default_value Optional. Default value to return, if a single option $name does not exist.
	 * @return mixed|array Value of the retrieved option $name or $default_value if it does not exist, or all options.
	 */
	public function get( $name = false, $default_value = null ) {
		if ( false === $name ) {
			return $this->option_value;
		}

		// Single Option wanted.
		if ( isset( $this->option_value[ $name ] ) ) {
			return $this->option_value[ $name ];
		} else {
			return $default_value;
		}
	}

	/**
	 * Update Option.
	 *
	 * @since 1.0.0
	 *
	 * @param array $new_options New options (name => value).
	 * @return bool True on success, false on failure.
	 */
	public function update( array $new_options ) {
		$this->option_value = $new_options;
		return $this->_update_option( $this->option_name, wp_json_encode( $this->option_value, TABLEPRESS_JSON_OPTIONS ) );
	}

	/**
	 * Delete Option.
	 *
	 * @since 1.0.0
	 *
	 * @return bool True on success, false on failure.
	 */
	public function delete() {
		return $this->_delete_option( $this->option_name );
	}

	/**
	 * Internal functions mapping - This needs to be re-defined by child classes.
	 */

	/**
	 * Get the value of a WP Option with the WP Options API.
	 *
	 * @since 1.0.0
	 *
	 * @param string $option_name   Name of the WP Option.
	 * @param mixed  $default_value Default value of the WP Option.
	 * @return mixed Current value of the WP Option, or $default_value if it does not exist.
	 */
	protected function _get_option( $option_name, $default_value ) {
		return get_option( $option_name, $default_value );
	}

	/**
	 * Update the value of a WP Option with the WP Options API.
	 *
	 * @since 1.0.0
	 *
	 * @param string $option_name Name of the WP Option.
	 * @param string $new_value   New value of the WP Option.
	 * @return bool True on success, false on failure.
	 */
	protected function _update_option( $option_name, $new_value ) {
		return update_option( $option_name, $new_value );
	}

	/**
	 * Delete a WP Option with the WP Options API.
	 *
	 * @since 1.0.0
	 *
	 * @param string $option_name Name of the WP Option.
	 * @return bool True on success, false on failure.
	 */
	protected function _delete_option( $option_name ) {
		return delete_option( $option_name );
	}

} // class TablePress_WP_Option