<?php

/**

 * Customize Setting Class

 *

 * @package WordPress

 * @subpackage Customize

 * @since 3.4.0

 */

class WP_Customize_Setting {

	public $manager;

	public $id;

	public $type            = 'theme_mod';

	public $capability      = 'edit_theme_options';

	public $theme_supports  = '';

	public $default         = '';

	public $transport       = 'refresh';

	public $sanitize_callback    = '';

	public $sanitize_js_callback = '';

	protected $id_data = array();

	private $_post_value; // Cached, sanitized $_POST value.

	/**

	 * Constructor.

	 *

	 * @since 3.4.0

	 *

	 * @param string $id An specific ID of the setting. Can be a

	 *                   theme mod or option name.

	 * @param array $args Setting arguments.

	 */

	function __construct( $manager, $id, $args = array() ) {

		$keys = array_keys( get_class_vars( __CLASS__ ) );

		foreach ( $keys as $key ) {

			if ( isset( $args[ $key ] ) )

				$this->$key = $args[ $key ];

		}

		$this->manager = $manager;

		$this->id = $id;

		// Parse the ID for array keys.

		$this->id_data[ 'keys' ] = preg_split( '/\[/', str_replace( ']', '', $this->id ) );

		$this->id_data[ 'base' ] = array_shift( $this->id_data[ 'keys' ] );

		// Rebuild the ID.

		$this->id = $this->id_data[ 'base' ];

		if ( ! empty( $this->id_data[ 'keys' ] ) )

			$this->id .= '[' . implode( '][', $this->id_data[ 'keys' ] ) . ']';

		if ( $this->sanitize_callback )

			add_filter( "customize_sanitize_{$this->id}", $this->sanitize_callback, 10, 2 );

		if ( $this->sanitize_js_callback )

			add_filter( "customize_sanitize_js_{$this->id}", $this->sanitize_js_callback, 10, 2 );

		return $this;

	}

	/**

	 * Handle previewing the setting.

	 *

	 * @since 3.4.0

	 */

	public function preview() {

		switch( $this->type ) {

			case 'theme_mod' :

				add_filter( 'theme_mod_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) );

				break;

			case 'option' :

				if ( empty( $this->id_data[ 'keys' ] ) )

					add_filter( 'pre_option_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) );

				else {

					add_filter( 'option_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) );

					add_filter( 'default_option_' . $this->id_data[ 'base' ], array( $this, '_preview_filter' ) );

				}

				break;

			default :

				do_action( 'customize_preview_' . $this->id );

		}

	}

	/**

	 * Callback function to filter the theme mods and options.

	 *

	 * @since 3.4.0

	 *

	 * @param mixed Old value.

	 * @return mixed New or old value.

	 */

	public function _preview_filter( $original ) {

		return $this->multidimensional_replace( $original, $this->id_data[ 'keys' ], $this->post_value() );

	}

	/**

	 * Set the value of the parameter for a specific theme.

	 *

	 * @since 3.4.0

	 *

	 * @return bool False if cap check fails or value isn't set.

	 */

	public final function save() {

		$value = $this->post_value();

		if ( ! $this->check_capabilities() || ! isset( $value ) )

			return false;

		do_action( 'customize_save_' . $this->id_data[ 'base' ] );

		$this->update( $value );

	}

	/**

	 * Fetches, validates, and sanitizes the $_POST value.

	 *

	 * @since 3.4.0

	 *

	 * @param $default mixed A default value which is used as a fallback. Default is null.

	 * @return mixed Either the default value on failure or sanitized value.

	 */

	public final function post_value( $default = null ) {

		if ( isset( $this->_post_value ) )

			return $this->_post_value;

		$result = $this->manager->post_value( $this );

		if ( isset( $result ) )

			return $this->_post_value = $result;

		else

			return $default;

	}

	/**

	 * Sanitize an input.

	 *

	 * @since 3.4.0

	 *

	 * @param $value mixed The value to sanitize.

	 * @return mixed Null if an input isn't valid, otherwise the sanitized value.

	 */

	public function sanitize( $value ) {

		$value = stripslashes_deep( $value );

		return apply_filters( "customize_sanitize_{$this->id}", $value, $this );

	}

	/**

	 * Set the value of the parameter for a specific theme.

	 *

	 * @since 3.4.0

	 *

	 * @param $value mixed The value to update.

	 * @return mixed The result of saving the value.

	 */

	protected function update( $value ) {

		switch( $this->type ) {

			case 'theme_mod' :

				return $this->_update_theme_mod( $value );

				break;

			case 'option' :

				return $this->_update_option( $value );

				break;

			default :

				return do_action( 'customize_update_' . $this->type, $value );

		}

	}

	/**

	 * Update the theme mod from the value of the parameter.

	 *

	 * @since 3.4.0

	 *

	 * @param $value mixed The value to update.

	 * @return mixed The result of saving the value.

	 */

	protected function _update_theme_mod( $value ) {

		// Handle non-array theme mod.

		if ( empty( $this->id_data[ 'keys' ] ) )

			return set_theme_mod( $this->id_data[ 'base' ], $value );

		// Handle array-based theme mod.

		$mods = get_theme_mod( $this->id_data[ 'base' ] );

		$mods = $this->multidimensional_replace( $mods, $this->id_data[ 'keys' ], $value );

		if ( isset( $mods ) )

			return set_theme_mod( $this->id_data[ 'base' ], $mods );

	}

	/**

	 * Update the theme mod from the value of the parameter.

	 *

	 * @since 3.4.0

	 *

	 * @param $value mixed The value to update.

	 * @return mixed The result of saving the value.

	 */

	protected function _update_option( $value ) {

		// Handle non-array option.

		if ( empty( $this->id_data[ 'keys' ] ) )

			return update_option( $this->id_data[ 'base' ], $value );

		// Handle array-based options.

		$options = get_option( $this->id_data[ 'base' ] );

		$options = $this->multidimensional_replace( $options, $this->id_data[ 'keys' ], $value );

		if ( isset( $options ) )

			return update_option( $this->id_data[ 'base' ], $options );

	}

	/**

	 * Fetch the value of the parameter for a specific theme.

	 *

	 * @since 3.4.0

	 *

	 * @return mixed The requested value.

	 */

	public function value() {

		switch( $this->type ) {

			case 'theme_mod' :

				$function = 'get_theme_mod';

				break;

			case 'option' :

				$function = 'get_option';

				break;

			default :

				return apply_filters( 'customize_value_' . $this->id_data[ 'base' ], $this->default );

		}

		// Handle non-array value

		if ( empty( $this->id_data[ 'keys' ] ) )

			return $function( $this->id_data[ 'base' ], $this->default );

		// Handle array-based value

		$values = $function( $this->id_data[ 'base' ] );

		return $this->multidimensional_get( $values, $this->id_data[ 'keys' ], $this->default );

	}

	/**

	 * Escape the parameter's value for use in JavaScript.

	 *

	 * @since 3.4.0

	 *

	 * @return mixed The requested escaped value.

	 */

	public function js_value() {

		$value = apply_filters( "customize_sanitize_js_{$this->id}", $this->value(), $this );

		if ( is_string( $value ) )

			return html_entity_decode( $value, ENT_QUOTES, 'UTF-8');

		return $value;

	}

	/**

	 * Check if the theme supports the setting and check user capabilities.

	 *

	 * @since 3.4.0

	 *

	 * @return bool False if theme doesn't support the setting or user can't change setting, otherwise true.

	 */

	public final function check_capabilities() {

		if ( $this->capability && ! call_user_func_array( 'current_user_can', (array) $this->capability ) )

			return false;

		if ( $this->theme_supports && ! call_user_func_array( 'current_theme_supports', (array) $this->theme_supports ) )

			return false;

		return true;

	}

	/**

	 * Multidimensional helper function.

	 *

	 * @since 3.4.0

	 *

	 * @param $root

	 * @param $keys

	 * @param bool $create Default is false.

	 * @return null|array

	 */

	final protected function multidimensional( &$root, $keys, $create = false ) {

		if ( $create && empty( $root ) )

			$root = array();

		if ( ! isset( $root ) || empty( $keys ) )

			return;

		$last = array_pop( $keys );

		$node = &$root;

		foreach ( $keys as $key ) {

			if ( $create && ! isset( $node[ $key ] ) )

				$node[ $key ] = array();

			if ( ! is_array( $node ) || ! isset( $node[ $key ] ) )

				return;

			$node = &$node[ $key ];

		}

		if ( $create && ! isset( $node[ $last ] ) )

			$node[ $last ] = array();

		if ( ! isset( $node[ $last ] ) )

			return;

		return array(

			'root' => &$root,

			'node' => &$node,

			'key'  => $last,

		);

	}

	/**

	 * Will attempt to replace a specific value in a multidimensional array.

	 *

	 * @since 3.4.0

	 *

	 * @param $root

	 * @param $keys

	 * @param mixed $value The value to update.

	 * @return

	 */

	final protected function multidimensional_replace( $root, $keys, $value ) {

		if ( ! isset( $value ) )

			return $root;

		elseif ( empty( $keys ) ) // If there are no keys, we're replacing the root.

			return $value;

		$result = $this->multidimensional( $root, $keys, true );

		if ( isset( $result ) )

			$result['node'][ $result['key'] ] = $value;

		return $root;

	}

	/**

	 * Will attempt to fetch a specific value from a multidimensional array.

	 *

	 * @since 3.4.0

	 *

	 * @param $root

	 * @param $keys

	 * @param $default A default value which is used as a fallback. Default is null.

	 * @return mixed The requested value or the default value.

	 */

	final protected function multidimensional_get( $root, $keys, $default = null ) {

		if ( empty( $keys ) ) // If there are no keys, test the root.

			return isset( $root ) ? $root : $default;

		$result = $this->multidimensional( $root, $keys );

		return isset( $result ) ? $result['node'][ $result['key'] ] : $default;

	}

	/**

	 * Will attempt to check if a specific value in a multidimensional array is set.

	 *

	 * @since 3.4.0

	 *

	 * @param $root

	 * @param $keys

	 * @return bool True if value is set, false if not.

	 */

	final protected function multidimensional_isset( $root, $keys ) {

		$result = $this->multidimensional_get( $root, $keys );

		return isset( $result );

	}

}

/**

 * A setting that is used to filter a value, but will not save the results.

 *

 * Results should be properly handled using another setting or callback.

 */

class WP_Customize_Filter_Setting extends WP_Customize_Setting {

	public function update() {}

}

/**

 * A setting that is used to filter a value, but will not save the results.

 *

 * Results should be properly handled using another setting or callback.

 */

final class WP_Customize_Header_Image_Setting extends WP_Customize_Setting {

	public $id = 'header_image_data';

	public function update( $value ) {

		global $custom_image_header;

		// If the value doesn't exist (removed or random),

		// use the header_image value.

		if ( ! $value )

			$value = $this->manager->get_setting('header_image')->post_value();

		if ( is_array( $value ) && isset( $value['choice'] ) )

			$custom_image_header->set_header_image( $value['choice'] );

		else

			$custom_image_header->set_header_image( $value );

	}

}

final class WP_Customize_Background_Image_Setting extends WP_Customize_Setting {

	public $id = 'background_image_thumb';

	public function update( $value ) {

		remove_theme_mod( 'background_image_thumb' );

	}

}