Popular Posts Widget

popular-widget.php

/**
* Popular Posts Widget
*
* Displays posts in last X days, sorted by most comments (proxy for popularity)
*
* @package      Core Functionality
* @author       Nuno Sarmento <hello@nuno-sarmento.com>
* 
*/
class NS_Popular_Widget extends WP_Widget {

	/**
	* Constructor
	*
	* @return void
	**/
	 public function __construct() {

		 	/* Widget settings. */
			$widget_ops = array( 'classname' => 'widget_popular', 'description' => 'Displays most popular posts by comment count' );

			/* Widget control settings. */
			$control_ops = array( 'id_base' => 'popular-widget' );

			//$this->WP_Widget( 'popular-widget', 'Popular Posts', $widget_ops, $control_ops );
			parent::__construct( 'popular-widget', 'Popular Posts', $widget_ops, $control_ops  );

	 }

	// Limit to last 30 days
	function filter_where( $where = '' ) {
		// posts in the last 30 days
		$where .= " AND post_date > '" . date('Y-m-d', strtotime('-' . $instance['days'] .' days')) . "'";
		return $where;
	}

	function widget( $args, $instance ) {

		extract( $args );


		// @codingStandardsIgnoreStart
		echo $before_widget;
		// @codingStandardsIgnoreEd

		if( !empty( $instance['title'] ) ) echo esc_attr( $before_title ) . esc_attr( $instance['title'] ) . esc_attr( $after_title );

		$loop_args = array(
			'posts_per_page' => (int) $instance['count'],
			'orderby' => 'comment_count'
		);

		if( 0 == $instance['days'] ) {
			$loop = new WP_Query( $loop_args );
		}else{
			add_filter( 'posts_where', array( $this, 'filter_where' ) );
			$loop = new WP_Query( $loop_args );
			remove_filter( 'posts_where', array( $this, 'filter_where' ) );
		}

		if( $loop->have_posts() ): while( $loop->have_posts() ): $loop->the_post(); global $post;

			if( 0 == $loop->current_post )
				echo '<p class="popular-post first">';
			else
				echo '<p class="popular-post">';
				echo '<a class="image" href="' . esc_url( get_permalink() ) . '"></a>';
				echo '<a class="title" href="' . esc_url( get_permalink() ) . '">' . esc_attr( get_the_title() ) . '</a>';
				echo '<br />';
				echo '<span class="date">' . get_the_date() . '</span>';
				echo '</p>';

		endwhile; endif; wp_reset_query();


		// @codingStandardsIgnoreStart
		echo $after_widget;
		// @codingStandardsIgnoreEnd

	}

	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;
		/* Strip tags (if needed) and update the widget settings. */
		$instance['title'] = $new_instance['title'];
		$instance['count'] = (int) $new_instance['count'];
		$instance['days'] = (int) $new_instance['days'];
		return $instance;
	}

	function form( $instance ) {
		/* Set up some default widget settings. */
		$defaults = array( 'title' => '', 'count' => 5, 'days' => 30 );
		$instance = wp_parse_args( (array) $instance, $defaults );
		$title = ! empty( $instance['title'] ) ? $instance['title'] : esc_html__( 'Popular Posts', 'nunosarmento' );
		$posts = ! empty( $instance['posts'] ) ? $instance['posts'] : esc_html__( '5', 'nunosarmento' );
		$days = ! empty( $instance['days'] ) ? $instance['days'] : esc_html__( '30', 'nunosarmento' );
	?>

		<p>
		<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php esc_attr_e( 'Title:', 'nunosarmento' ); ?></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( 'posts' ) ); ?>"><?php esc_attr_e( 'Number of Posts:', 'nunosarmento' ); ?></label>
		<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'posts' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'posts' ) ); ?>" type="text" value="<?php echo esc_attr( $posts ); ?>">
		</p>

		<p>
		<label for="<?php echo esc_attr( $this->get_field_id( 'days' ) ); ?>"><?php esc_attr_e( 'Posted in the past X days:', 'nunosarmento' ); ?></label>
		<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'days' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'days' ) ); ?>" type="text" value="<?php echo esc_attr( $days ); ?>">
		</p>
		<p class="description">Use 0 for no time limit.</p>
		<?php
	}

}

/** Add our function to the widgets_init hook. **/
add_action( 'widgets_init', 'ns_popular_load_widgets' );
function ns_popular_load_widgets() {
	register_widget( 'NS_Popular_Widget' );
}