<?php

/**

 * Widget API: WP_Widget_Calendar class

 *

 * @package WordPress

 * @subpackage Widgets

 * @since 4.4.0

 */

/**

 * Core class used to implement the Calendar widget.

 *

 * @since 2.8.0

 *

 * @see WP_Widget

 */

class WP_Widget_Calendar extends WP_Widget {

	/**

	 * Ensure that the ID attribute only appears in the markup once

	 *

	 * @since 4.4.0

	 * @var int

	 */

	private static $instance = 0;

	/**

	 * Sets up a new Calendar widget instance.

	 *

	 * @since 2.8.0

	 */

	public function __construct() {

		$widget_ops = array(

			'classname'                   => 'widget_calendar',

			'description'                 => __( 'A calendar of your site’s posts.' ),

			'customize_selective_refresh' => true,

			'show_instance_in_rest'       => true,

		);

		parent::__construct( 'calendar', __( 'Calendar' ), $widget_ops );

	}

	/**

	 * Outputs the content for the current Calendar widget instance.

	 *

	 * @since 2.8.0

	 *

	 * @param array $args     Display arguments including 'before_title', 'after_title',

	 *                        'before_widget', and 'after_widget'.

	 * @param array $instance The settings for the particular instance of the widget.

	 */

	public function widget( $args, $instance ) {

		$title = ! empty( $instance['title'] ) ? $instance['title'] : '';

		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */

		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

		echo $args['before_widget'];

		if ( $title ) {

			echo $args['before_title'] . $title . $args['after_title'];

		}

		if ( 0 === self::$instance ) {

			echo '<div id="calendar_wrap" class="calendar_wrap">';

		} else {

			echo '<div class="calendar_wrap">';

		}

		get_calendar();

		echo '</div>';

		echo $args['after_widget'];

	}

	/**

	 * Handles updating settings for the current Calendar widget instance.

	 *

	 * @since 2.8.0

	 *

	 * @param array $new_instance New settings for this instance as input by the user via

	 *                            WP_Widget::form().

	 * @param array $old_instance Old settings for this instance.

	 * @return array Updated settings to save.

	 */

	public function update( $new_instance, $old_instance ) {

		$instance          = $old_instance;

		$instance['title'] = sanitize_text_field( $new_instance['title'] );

		return $instance;

	}

	/**

	 * Outputs the settings form for the Calendar widget.

	 *

	 * @since 2.8.0

	 *

	 * @param array $instance Current settings.

	 */

	public function form( $instance ) {

		$instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );

		?>

		<p>

			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>

			<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />

		</p>

		<?php

	}

}