<?php

/**

 * Makes a custom Widget for displaying Aside, Link, Status, and Quote Posts available with Twenty Eleven

 *

 * Learn more: http://codex.wordpress.org/Widgets_API#Developing_Widgets

 *

 * @package WordPress

 * @subpackage Twenty_Eleven

 * @since Twenty Eleven 1.0

 */

class Twenty_Eleven_Ephemera_Widget extends WP_Widget {

	/**

	 * Constructor

	 *

	 * @return void

	 **/

	function Twenty_Eleven_Ephemera_Widget() {

		$widget_ops = array( 'classname' => 'widget_twentyeleven_ephemera', 'description' => __( 'Use this widget to list your recent Aside, Status, Quote, and Link posts', 'twentyeleven' ) );

		$this->WP_Widget( 'widget_twentyeleven_ephemera', __( 'Twenty Eleven Ephemera', 'twentyeleven' ), $widget_ops );

		$this->alt_option_name = 'widget_twentyeleven_ephemera';

		add_action( 'save_post', array(&$this, 'flush_widget_cache' ) );

		add_action( 'deleted_post', array(&$this, 'flush_widget_cache' ) );

		add_action( 'switch_theme', array(&$this, 'flush_widget_cache' ) );

	}

	/**

	 * Outputs the HTML for this widget.

	 *

	 * @param array An array of standard parameters for widgets in this theme

	 * @param array An array of settings for this widget instance

	 * @return void Echoes it's output

	 **/

	function widget( $args, $instance ) {

		$cache = wp_cache_get( 'widget_twentyeleven_ephemera', 'widget' );

		if ( !is_array( $cache ) )

			$cache = array();

		if ( ! isset( $args['widget_id'] ) )

			$args['widget_id'] = null;

		if ( isset( $cache[$args['widget_id']] ) ) {

			echo $cache[$args['widget_id']];

			return;

		}

		ob_start();

		extract( $args, EXTR_SKIP );

		$title = apply_filters( 'widget_title', empty( $instance['title'] ) ? __( 'Ephemera', 'twentyeleven' ) : $instance['title'], $instance, $this->id_base);

		if ( ! isset( $instance['number'] ) )

			$instance['number'] = '10';

		if ( ! $number = absint( $instance['number'] ) )

 			$number = 10;

		$ephemera_args = array(

			'order' => 'DESC',

			'posts_per_page' => $number,

			'no_found_rows' => true,

			'post_status' => 'publish',

			'post__not_in' => get_option( 'sticky_posts' ),

			'tax_query' => array(

				array(

					'taxonomy' => 'post_format',

					'terms' => array( 'post-format-aside', 'post-format-link', 'post-format-status', 'post-format-quote' ),

					'field' => 'slug',

					'operator' => 'IN',

				),

			),

		);

		$ephemera = new WP_Query( $ephemera_args );

		if ( $ephemera->have_posts() ) :

			echo $before_widget;

			echo $before_title;

			echo $title; // Can set this with a widget option, or omit altogether

			echo $after_title;

			?>

			<ol>

			<?php while ( $ephemera->have_posts() ) : $ephemera->the_post(); ?>

				<?php if ( 'link' != get_post_format() ) : ?>

				<li class="widget-entry-title">

					<a href="<?php echo esc_url( get_permalink() ); ?>" title="<?php printf( esc_attr__( 'Permalink to %s', 'twentyeleven' ), the_title_attribute( 'echo=0' ) ); ?>" rel="bookmark"><?php the_title(); ?></a>

					<span class="comments-link">

						<?php comments_popup_link( __( '0 <span class="reply">comments &rarr;</span>', 'twentyeleven' ), __( '1 <span class="reply">comment &rarr;</span>', 'twentyeleven' ), __( '% <span class="reply">comments &rarr;</span>', 'twentyeleven' ) ); ?>

					</span>

				</li>

				<?php else : ?>

				<li class="widget-entry-title">

					<?php

						// Grab first link from the post content. If none found, use the post permalink as fallback.

						$link_url = twentyeleven_url_grabber();

						if ( empty( $link_url ) )

							$link_url = get_permalink();

					?>

					<a href="<?php echo esc_url( $link_url ); ?>" title="<?php printf( esc_attr__( 'Link to %s', 'twentyeleven' ), the_title_attribute( 'echo=0' ) ); ?>" rel="bookmark"><?php the_title(); ?>&nbsp;<span>&rarr;</span></a>

					<span class="comments-link">

						<?php comments_popup_link( __( '0 <span class="reply">comments &rarr;</span>', 'twentyeleven' ), __( '1 <span class="reply">comment &rarr;</span>', 'twentyeleven' ), __( '% <span class="reply">comments &rarr;</span>', 'twentyeleven' ) ); ?>

					</span>

				</li>

				<?php endif; ?>

			<?php endwhile; ?>

			</ol>

			<?php

			echo $after_widget;

			// Reset the post globals as this query will have stomped on it

			wp_reset_postdata();

		// end check for ephemeral posts

		endif;

		$cache[$args['widget_id']] = ob_get_flush();

		wp_cache_set( 'widget_twentyeleven_ephemera', $cache, 'widget' );

	}

	/**

	 * Deals with the settings when they are saved by the admin. Here is

	 * where any validation should be dealt with.

	 **/

	function update( $new_instance, $old_instance ) {

		$instance = $old_instance;

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

		$instance['number'] = (int) $new_instance['number'];

		$this->flush_widget_cache();

		$alloptions = wp_cache_get( 'alloptions', 'options' );

		if ( isset( $alloptions['widget_twentyeleven_ephemera'] ) )

			delete_option( 'widget_twentyeleven_ephemera' );

		return $instance;

	}

	function flush_widget_cache() {

		wp_cache_delete( 'widget_twentyeleven_ephemera', 'widget' );

	}

	/**

	 * Displays the form for this widget on the Widgets page of the WP Admin area.

	 **/

	function form( $instance ) {

		$title = isset( $instance['title']) ? esc_attr( $instance['title'] ) : '';

		$number = isset( $instance['number'] ) ? absint( $instance['number'] ) : 10;

?>

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

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

			<p><label for="<?php echo esc_attr( $this->get_field_id( 'number' ) ); ?>"><?php _e( 'Number of posts to show:', 'twentyeleven' ); ?></label>

			<input id="<?php echo esc_attr( $this->get_field_id( 'number' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'number' ) ); ?>" type="text" value="<?php echo esc_attr( $number ); ?>" size="3" /></p>

		<?php

	}

}