<?php

/**

 * Customize Manager.

 *

 * @package WordPress

 * @subpackage Customize

 * @since 3.4.0

 */

final class WP_Customize_Manager {

	protected $theme;

	protected $original_stylesheet;

	protected $previewing = false;

	protected $settings = array();

	protected $sections = array();

	protected $controls = array();

	protected $nonce_tick;

	protected $customized;

	private $_post_values;

	/**

	 * Constructor.

	 *

	 * @since 3.4.0

	 */

	public function __construct() {

		require( ABSPATH . WPINC . '/class-wp-customize-setting.php' );

		require( ABSPATH . WPINC . '/class-wp-customize-section.php' );

		require( ABSPATH . WPINC . '/class-wp-customize-control.php' );

		add_filter( 'wp_die_handler', array( $this, 'wp_die_handler' ) );

		add_action( 'setup_theme',  array( $this, 'setup_theme' ) );

		add_action( 'wp_loaded',    array( $this, 'wp_loaded' ) );

		// Run wp_redirect_status late to make sure we override the status last.

		add_action( 'wp_redirect_status', array( $this, 'wp_redirect_status' ), 1000 );

		// Do not spawn cron (especially the alternate cron) while running the customizer.

		remove_action( 'init', 'wp_cron' );

		// Do not run update checks when rendering the controls.

		remove_action( 'admin_init', '_maybe_update_core' );

		remove_action( 'admin_init', '_maybe_update_plugins' );

		remove_action( 'admin_init', '_maybe_update_themes' );

		add_action( 'wp_ajax_customize_save', array( $this, 'save' ) );

		add_action( 'customize_register',                 array( $this, 'register_controls' ) );

		add_action( 'customize_controls_init',            array( $this, 'prepare_controls' ) );

		add_action( 'customize_controls_enqueue_scripts', array( $this, 'enqueue_control_scripts' ) );

	}

	/**

	 * Return true if it's an AJAX request.

	 *

	 * @since 3.4.0

	 *

	 * @return bool

	 */

	public function doing_ajax() {

		return isset( $_POST['customized'] ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX );

	}

	/**

	 * Custom wp_die wrapper. Returns either the standard message for UI

	 * or the AJAX message.

	 *

	 * @since 3.4.0

	 *

	 * @param mixed $ajax_message AJAX return

	 * @param mixed $message UI message

	 */

	protected function wp_die( $ajax_message, $message = null ) {

		if ( $this->doing_ajax() )

			wp_die( $ajax_message );

		if ( ! $message )

			$message = __( 'Cheatin’ uh?' );

		wp_die( $message );

	}

	/**

	 * Return the AJAX wp_die() handler if it's a customized request.

	 *

	 * @since 3.4.0

	 *

	 * @return string

	 */

	public function wp_die_handler() {

		if ( $this->doing_ajax() )

			return '_ajax_wp_die_handler';

		return '_default_wp_die_handler';

	}

	/**

	 * Start preview and customize theme.

	 *

	 * Check if customize query variable exist. Init filters to filter the current theme.

	 *

	 * @since 3.4.0

	 */

	public function setup_theme() {

		send_origin_headers();

		if ( is_admin() && ! $this->doing_ajax() )

		    auth_redirect();

		elseif ( $this->doing_ajax() && ! is_user_logged_in() )

		    $this->wp_die( 0 );

		show_admin_bar( false );

		if ( ! current_user_can( 'edit_theme_options' ) )

			$this->wp_die( -1 );

		$this->original_stylesheet = get_stylesheet();

		$this->theme = wp_get_theme( isset( $_REQUEST['theme'] ) ? $_REQUEST['theme'] : null );

		if ( $this->is_theme_active() ) {

			// Once the theme is loaded, we'll validate it.

			add_action( 'after_setup_theme', array( $this, 'after_setup_theme' ) );

		} else {

			if ( ! current_user_can( 'switch_themes' ) )

				$this->wp_die( -1 );

			// If the theme isn't active, you can't preview it if it is not allowed or has errors.

			if ( $this->theme()->errors() )

				$this->wp_die( -1 );

			if ( ! $this->theme()->is_allowed() )

				$this->wp_die( -1 );

		}

		$this->start_previewing_theme();

	}

	/**

	 * Callback to validate a theme once it is loaded

	 *

	 * @since 3.4.0

	 */

	function after_setup_theme() {

		if ( ! $this->doing_ajax() && ! validate_current_theme() ) {

			wp_redirect( 'themes.php?broken=true' );

			exit;

		}

	}

	/**

	 * Start previewing the selected theme.

	 *

	 * Adds filters to change the current theme.

	 *

	 * @since 3.4.0

	 */

	public function start_previewing_theme() {

		// Bail if we're already previewing.

		if ( $this->is_preview() )

			return;

		$this->previewing = true;

		if ( ! $this->is_theme_active() ) {

			add_filter( 'template', array( $this, 'get_template' ) );

			add_filter( 'stylesheet', array( $this, 'get_stylesheet' ) );

			add_filter( 'pre_option_current_theme', array( $this, 'current_theme' ) );

			// @link: http://core.trac.wordpress.org/ticket/20027

			add_filter( 'pre_option_stylesheet', array( $this, 'get_stylesheet' ) );

			add_filter( 'pre_option_template', array( $this, 'get_template' ) );

			// Handle custom theme roots.

			add_filter( 'pre_option_stylesheet_root', array( $this, 'get_stylesheet_root' ) );

			add_filter( 'pre_option_template_root', array( $this, 'get_template_root' ) );

		}

		do_action( 'start_previewing_theme', $this );

	}

	/**

	 * Stop previewing the selected theme.

	 *

	 * Removes filters to change the current theme.

	 *

	 * @since 3.4.0

	 */

	public function stop_previewing_theme() {

		if ( ! $this->is_preview() )

			return;

		$this->previewing = false;

		if ( ! $this->is_theme_active() ) {

			remove_filter( 'template', array( $this, 'get_template' ) );

			remove_filter( 'stylesheet', array( $this, 'get_stylesheet' ) );

			remove_filter( 'pre_option_current_theme', array( $this, 'current_theme' ) );

			// @link: http://core.trac.wordpress.org/ticket/20027

			remove_filter( 'pre_option_stylesheet', array( $this, 'get_stylesheet' ) );

			remove_filter( 'pre_option_template', array( $this, 'get_template' ) );

			// Handle custom theme roots.

			remove_filter( 'pre_option_stylesheet_root', array( $this, 'get_stylesheet_root' ) );

			remove_filter( 'pre_option_template_root', array( $this, 'get_template_root' ) );

		}

		do_action( 'stop_previewing_theme', $this );

	}

	/**

	 * Get the theme being customized.

	 *

	 * @since 3.4.0

	 *

	 * @return WP_Theme

	 */

	public function theme() {

		return $this->theme;

	}

	/**

	 * Get the registered settings.

	 *

	 * @since 3.4.0

	 *

	 * @return array

	 */

	public function settings() {

		return $this->settings;

	}

	/**

	 * Get the registered controls.

	 *

	 * @since 3.4.0

	 *

	 * @return array

	 */

	public function controls() {

		return $this->controls;

	}

	/**

	 * Get the registered sections.

	 *

	 * @since 3.4.0

	 *

	 * @return array

	 */

	public function sections() {

		return $this->sections;

	}

	/**

	 * Checks if the current theme is active.

	 *

	 * @since 3.4.0

	 *

	 * @return bool

	 */

	public function is_theme_active() {

		return $this->get_stylesheet() == $this->original_stylesheet;

	}

	/**

	 * Register styles/scripts and initialize the preview of each setting

	 *

	 * @since 3.4.0

	 */

	public function wp_loaded() {

		do_action( 'customize_register', $this );

		if ( $this->is_preview() && ! is_admin() )

			$this->customize_preview_init();

	}

	/**

	 * Prevents AJAX requests from following redirects when previewing a theme

	 * by issuing a 200 response instead of a 30x.

	 *

	 * Instead, the JS will sniff out the location header.

	 *

	 * @since 3.4.0

	 *

	 * @param $status

	 * @return int

	 */

	public function wp_redirect_status( $status ) {

		if ( $this->is_preview() && ! is_admin() )

			return 200;

		return $status;

	}

	/**

	 * Decode the $_POST attribute used to override the WP_Customize_Setting values.

	 *

	 * @since 3.4.0

	 *

	 * @param mixed $setting A WP_Customize_Setting derived object

	 * @return string Sanitized attribute

	 */

	public function post_value( $setting ) {

		if ( ! isset( $this->_post_values ) ) {

			if ( isset( $_POST['customized'] ) )

				$this->_post_values = json_decode( stripslashes( $_POST['customized'] ), true );

			else

				$this->_post_values = false;

		}

		if ( isset( $this->_post_values[ $setting->id ] ) )

			return $setting->sanitize( $this->_post_values[ $setting->id ] );

	}

	/**

	 * Print javascript settings.

	 *

	 * @since 3.4.0

	 */

	public function customize_preview_init() {

		$this->nonce_tick = check_ajax_referer( 'preview-customize_' . $this->get_stylesheet(), 'nonce' );

		$this->prepare_controls();

		wp_enqueue_script( 'customize-preview' );

		add_action( 'wp_head', array( $this, 'customize_preview_base' ) );

		add_action( 'wp_head', array( $this, 'customize_preview_html5' ) );

		add_action( 'wp_footer', array( $this, 'customize_preview_settings' ), 20 );

		add_action( 'shutdown', array( $this, 'customize_preview_signature' ), 1000 );

		add_filter( 'wp_die_handler', array( $this, 'remove_preview_signature' ) );

		foreach ( $this->settings as $setting ) {

			$setting->preview();

		}

		do_action( 'customize_preview_init', $this );

	}

	/**

	 * Print base element for preview frame.

	 *

	 * @since 3.4.0

	 */

	public function customize_preview_base() {

		?><base href="<?php echo home_url( '/' ); ?>" /><?php

	}

	/**

	 * Print a workaround to handle HTML5 tags in IE < 9

	 *

	 * @since 3.4.0

	 */

	public function customize_preview_html5() { ?>

		<!--[if lt IE 9]>

		<script type="text/javascript">

			var e = [ 'abbr', 'article', 'aside', 'audio', 'canvas', 'datalist', 'details',

				'figure', 'footer', 'header', 'hgroup', 'mark', 'menu', 'meter', 'nav',

				'output', 'progress', 'section', 'time', 'video' ];

			for ( var i = 0; i < e.length; i++ ) {

				document.createElement( e[i] );

			}

		</script>

		<![endif]--><?php

	}

	/**

	 * Print javascript settings for preview frame.

	 *

	 * @since 3.4.0

	 */

	public function customize_preview_settings() {

		$settings = array(

			'values'  => array(),

			'channel' => esc_js( $_POST['customize_messenger_channel'] ),

		);

		if ( 2 == $this->nonce_tick ) {

			$settings['nonce'] = array(

				'save' => wp_create_nonce( 'save-customize_' . $this->get_stylesheet() ),

				'preview' => wp_create_nonce( 'preview-customize_' . $this->get_stylesheet() )

			);

		}

		foreach ( $this->settings as $id => $setting ) {

			$settings['values'][ $id ] = $setting->js_value();

		}

		?>

		<script type="text/javascript">

			var _wpCustomizeSettings = <?php echo json_encode( $settings ); ?>;

		</script>

		<?php

	}

	/**

	 * Prints a signature so we can ensure the customizer was properly executed.

	 *

	 * @since 3.4.0

	 */

	public function customize_preview_signature() {

		echo 'WP_CUSTOMIZER_SIGNATURE';

	}

	/**

	 * Removes the signature in case we experience a case where the customizer was not properly executed.

	 *

	 * @since 3.4.0

	 */

	public function remove_preview_signature( $return = null ) {

		remove_action( 'shutdown', array( $this, 'customize_preview_signature' ), 1000 );

		return $return;

	}

	/**

	 * Is it a theme preview?

	 *

	 * @since 3.4.0

	 *

	 * @return bool True if it's a preview, false if not.

	 */

	public function is_preview() {

		return (bool) $this->previewing;

	}

	/**

	 * Retrieve the template name of the previewed theme.

	 *

	 * @since 3.4.0

	 *