<?php
/**
 * File: Util_Widget.php
 *
 * @package W3TC
 *
 * phpcs:disable Generic.Files.OneObjectStructurePerFile
 */

namespace W3TC;

/**
 * Class: Util_Widget
 */
class Util_Widget {
	/**
	 * Dashboard widgets.
	 *
	 * @var array
	 * @static
	 */
	public static $w3tc_dashboard_widgets = array();

	/**
	 * Registers dashboard widgets.
	 *
	 * Handles POST data, sets up filters.
	 *
	 * @since 0.9.2.6
	 * @static
	 */
	public static function setup() {
		global $w3tc_registered_widgets, $w3tc_registered_widget_controls, $w3tc_dashboard_control_callbacks;

		$w3tc_dashboard_control_callbacks = array();
		$screen                           = get_current_screen();
		$update                           = false;
		$widget_options                   = get_option( 'w3tc_dashboard_widget_options' );

		if ( ! $widget_options || ! is_array( $widget_options ) ) {
			$widget_options = array();
		}

		// Hook to register new widgets. Filter widget order.
		if ( is_network_admin() ) {
			do_action( 'w3tc_network_dashboard_setup' );
			$dashboard_widgets = apply_filters( 'w3tc_network_dashboard_widgets', array() );
		} else {
			do_action( 'w3tc_widget_setup' );
			$dashboard_widgets = apply_filters( 'w3tc_dashboard_widgets', array() );
		}

		foreach ( $dashboard_widgets as $widget_id ) {
			$name = empty( $w3tc_registered_widgets[ $widget_id ]['all_link'] ) ? $w3tc_registered_widgets[ $widget_id ]['name'] : $w3tc_registered_widgets[ $widget_id ]['name'] . " <a href='{$w3tc_registered_widgets[$widget_id]['all_link']}' class='edit-box open-box'>" . __( 'View all', 'w3-total-cache' ) . '</a>';
			self::add( $widget_id, $name, $w3tc_registered_widgets[ $widget_id ]['callback'], $w3tc_registered_widget_controls[ $widget_id ]['callback'] );
		}

		if ( 'POST' === isset( $_SERVER['REQUEST_METHOD'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ) : '' && ! empty( Util_Request::get_string( 'widget_id' ) ) ) {
			check_admin_referer( 'edit-dashboard-widget_' . Util_Request::get_string( 'widget_id' ), 'dashboard-widget-nonce' );
			ob_start(); // The same hack "wp-admin/widgets.php" uses.
			self::trigger_widget_control( Util_Request::get_string( 'widget_id' ) );
			ob_end_clean();
		}

		if ( $update ) {
			update_option( 'w3tc_dashboard_widget_options', $widget_options );
		}

		do_action( 'do_meta_boxes', $screen->id, 'normal', '' );
		do_action( 'do_meta_boxes', $screen->id, 'side', '' );
	}

	/**
	 * Add 2.
	 *
	 * @static
	 *
	 * @param string   $widget_id Widget id.
	 * @param int      $priority Prioroty.
	 * @param string   $widget_name Widget name.
	 * @param callable $callback Callback.
	 * @param callable $control_callback Control callback.
	 * @param string   $location Location.
	 * @param string   $header_text Header text.
	 * @param string   $header_class Header class.
	 */
	public static function add2( $widget_id, $priority, $widget_name, $callback,
			$control_callback = null, $location = 'normal', $header_text = null,
			$header_class = '' ) {
		$o = new _Util_Widget_Postponed(
			array(
				'widget_id'        => $widget_id,
				'widget_name'      => $widget_name,
				'callback'         => $callback,
				'control_callback' => $control_callback,
				'location'         => $location,
				'header_text'      => $header_text,
				'header_class'     => $header_class,
			)
		);

		add_action(
			'w3tc_widget_setup',
			array( $o, 'wp_dashboard_setup' ),
			$priority
		);

		add_action(
			'w3tc_network_dashboard_setup',
			array( $o, 'wp_dashboard_setup' ),
			$priority
		);

		self::$w3tc_dashboard_widgets[ $widget_id ] = '*';
	}

	/**
	 * Registers widget.
	 *
	 * @static
	 *
	 * @param string   $widget_id        Widget id.
	 * @param string   $widget_name      Widget name.
	 * @param callable $callback         Callback.
	 * @param callable $control_callback Control callback.
	 * @param string   $location         Location.
	 * @param string   $header_text      Header text.
	 * @param string   $header_class     Header class.
	 */
	public static function add( $widget_id, $widget_name, $callback,
			$control_callback = null, $location = 'normal', $header_text = null,
			$header_class = '' ) {
		$screen = get_current_screen();

		global $w3tc_dashboard_control_callbacks;

		if ( substr( $widget_name, 0, 1 ) !== '<' ) {
			$widget_name = '<div class="w3tc-widget-text">' . $widget_name . '</div>';
		}

		// Link.
		if ( $control_callback && current_user_can( 'edit_dashboard' ) && is_string( $control_callback ) ) {
			if ( ! $header_text ) {
				$header_text = __( 'Configure' );
			}

			$widget_name .= ' <span class="w3tc-widget-configure postbox-title-action">' .
				'<a href="' . esc_url( $control_callback ) . '" class="edit-box open-box ' .
				esc_attr( $header_class ) . '">' . $header_text . '</a></span>';
		}

		// Ajax callback.
		if ( $control_callback && current_user_can( 'edit_dashboard' ) && is_callable( $control_callback ) ) {
			$w3tc_dashboard_control_callbacks[ $widget_id ] = $control_callback;
			$edit_val                                       = Util_Request::get_string( 'edit' );

			if ( ! empty( $edit_val ) && $widget_id === $edit_val ) {
				list( $url )  = explode( '#', add_query_arg( 'edit', false ), 2 );
				$widget_name .= ' <span class="postbox-title-action"><a href="' . esc_url( $url ) .
					'">' . __( 'Cancel', 'w3-total-cache' ) . '</a></span>';

				$callback = array(
					'\W3TC\Util_Widget',
					'_dashboard_control_callback',
				);
			} else {
				list( $url )  = explode( '#', add_query_arg( 'edit', $widget_id ), 2 );
				$widget_name .= ' <span class="postbox-title-action"><a href="' . esc_url( "$url#$widget_id" ) .
					'" class="edit-box open-box">' . __( 'Configure' ) . '</a></span>';
			}
		}

		$side_widgets = array();

		$priority = 'core';

		add_meta_box( $widget_id, $widget_name, $callback, $screen, $location, $priority );
	}

	/**
	 * Dashboard Widgets Controls.
	 *
	 * @static
	 *
	 * @param string $dashboard Dashboard id.
	 * @param array  $meta_box Meta box info.
	 */
	public static function _dashboard_control_callback( $dashboard, $meta_box ) { // phpcs:ignore PSR2.Methods.MethodDeclaration.Underscore
		echo '<form action="" method="post" class="dashboard-widget-control-form">';
		self::trigger_widget_control( $meta_box['id'] );
		wp_nonce_field( 'edit-dashboard-widget_' . $meta_box['id'], 'dashboard-widget-nonce' );
		echo '<input type="hidden" name="widget_id" value="' . esc_attr( $meta_box['id'] ) . '" />';
		submit_button( __( 'Submit' ) );
		echo '</form>';
	}

	/**
	 * List widgets.
	 *
	 * @static
	 *
	 * @return string
	 */
	public static function list_widgets() {
		return implode( ',', array_keys( self::$w3tc_dashboard_widgets ) );
	}

	/**
	 * Calls widget control callback.
	 *
	 * @since 0.9.2.6
	 * @static
	 *
	 * @param int|bool $widget_control_id Registered widget id.
	 */
	public static function trigger_widget_control( $widget_control_id = false ) {
		global $w3tc_dashboard_control_callbacks;

		if ( is_scalar( $widget_control_id ) && $widget_control_id &&
				isset( $w3tc_dashboard_control_callbacks[ $widget_control_id ] ) &&
				is_callable( $w3tc_dashboard_control_callbacks[ $widget_control_id ] ) ) {
			call_user_func(
				$w3tc_dashboard_control_callbacks[ $widget_control_id ],
				'',
				array(
					'id'       => $widget_control_id,
					'callback' => $w3tc_dashboard_control_callbacks[ $widget_control_id ],
				)
			);
		}
	}
}

/**
 * Class: Util_Widget_Postponed
 */
class _Util_Widget_Postponed { // phpcs:ignore
	/**
	 * Data.
	 *
	 * @var array
	 * @access private
	 */
	private $data = array();

	/**
	 * Constructor.
	 *
	 * @param array $data Data.
	 */
	public function __construct( $data ) {
		$this->data = $data;
	}

	/**
	 * Dashboard setup.
	 */
	public function wp_dashboard_setup() {
		Util_Widget::add(
			$this->data['widget_id'],
			$this->data['widget_name'],
			$this->data['callback'],
			$this->data['control_callback'],
			$this->data['location'],
			$this->data['header_text'],
			$this->data['header_class']
		);
	}
}

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