Top Help Users Widget

top-help-users.php

<?php
/*
Plugin Name: Top Help Users
Description: Widget to display top users of help.hackshackers.com by reputation
Author: Benjamin J. Balter
Version: 1.0
Author URI: http://ben.balter.com
*/

class Top_Help_Users_Widget extends WP_Widget {
	
	//default settings
	private $defaults = array( 
			'number' => 5,
			'title' => 'Top Users',
		);

	/**
	 * Init widget and register
	 */
	function __construct() {
		parent::WP_Widget( 'Top_Help_Users_Widget', $name = 'Top Help Users' );
		add_action( 'widgets_init', create_function( '', 'return register_widget("Top_Help_Users_Widget");' ) );
		
	}
	
	/**
	 * Callback to display widget contents
	 */
	function widget( $args, $instance ) {

		extract( $args );
		
		$args = array( 
				'number' => $instance['number'],
				'meta_key' => '_qa_rep',
				'meta_value' => 0,
				'meta_compare' => '>',
				'orderby' => 'wp_usermeta.meta_value',
				'order' => 'DESC',
		);
		
		add_filter( 'pre_user_query', array( &$this, 'user_query_filter' ) );
		$users = get_users( $args );
		remove_filter( 'pre_user_query', array( &$this, 'user_query_filter' ) );
				 					
		echo $before_widget; 
 		
		echo $before_title . apply_filters( 'widget_title', $instance['title'] ) . $after_title;
		
		echo "<ol>";
		
		foreach ( $users as $user ) {
			$rep = get_user_meta( $user->ID, '_qa_rep', true );
			
			echo '<li><a href="'. site_url( 'questions/user/' . $user->user_nicename . '/' ) .'" title="View ' . $user->display_name . '\'s profile">' . $user->display_name . "</a> ($rep)</li>";
		
		}
		
		echo "</ol>";	
		
		echo $after_widget;
		
	}
	
	/**
	 * Callback to display widget options form
	 */
	function form( $instance ) {
			
		foreach ( $this->defaults as $key => $value )
			if ( !isset( $instance[ $key ] ) )
				$instance[ $key ] = $value;
		
		?>
		<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 $instance['title']; ?>" />
		</p>
		<p>
		<label for="<?php echo $this->get_field_id('number'); ?>">Number of Users</label><br />
		<input class="small-text" id="<?php echo $this->get_field_id('number'); ?>" name="<?php echo $this->get_field_name('number'); ?>" type="text" value="<?php echo $instance['number']; ?>" />
		</p>
		<?php
	}
	
	/**
	 * Sanitizes options and saves
	 */
	function update( $new_instance, $old_instance ) {
	
		$instance = $old_instance;
		$instance['title'] = strip_tags( $new_instance['title'] );
		$instance['number'] = (int) $new_instance['number'];
	
		return $instance;
		
	}
	
	/**
	 * Sorts get_users by meta_key
	 */
	function user_query_filter( $query ) {
		//note: "+0" forces the value into an int so mysql sorts properly
		$query->query_orderby = 'ORDER BY (wp_usermeta.meta_value + 0) DESC';
		return $query;
	}

}

new Top_Help_Users_Widget;