WordPress Loop Processing Widget Proof Of Concept

wordpress-loop-widget.php

<?php

class WPPluginTemplateWidget extends WP_Widget {
	function __construct () {
		$widget_ops = array (
			'description' => __('Template Test Widget')
			);
		parent::WP_Widget ('WPPluginTemplateWidget', __('WP Plugin Template'), $widget_ops);
	}
	
	function form ($instance) {
		$text_stub = '<label for="%s">%s</label><input type="text" id="%s" name="%s" value="%s" class="widefat" />';
		
		$instance = wp_parse_args (
			(array) $instance,
			array (
				'title' => __('WP Plugin Template')
			)
		);
		
		$content = '<p>'
			. sprintf ($text_stub,
				$this->get_field_id ('title'),
				__('Widget Title'),
				$this->get_field_id ('title'),
				$this->get_field_name ('title'),
				attribute_escape ($instance['title'])
				)
			. '</p>';
		
		echo $content;
	}
	
	function update ($new_instance, $old_instance) {
		$instance = $old_instance;
		
		$instance['title'] = strip_tags ($new_instance['title']);
		
		return $instance;
	}
	
	function widget ($args, $instance) {
		global $post;
		
		extract ($args, EXTR_SKIP);
		
		$content = $before_widget;
		if ($instance['title']) {
			$content .= $before_title . $instance['title'] . $after_title;
		}
		
		if (!is_main_query ()) {
			wp_reset_query ();
		}

		if (is_front_page ()) {
			$content .= '<strong>Type: Front Page</strong><br />';
		}
		
		elseif (is_archive ()) {
			$content .= '<strong>Type: Archive</strong><br />';
		}
		
		elseif (is_page ()) {
			$content .= '<strong>Type: Page</strong><br />';
		}
		
		elseif (is_single ()) {
			$content .= '<strong>Type: Single</strong><br />';
		}
		
		elseif (is_feed ()) {
			$content .= '<strong>Type: Feed</strong><br />';
		}
		
		else {
			$content .= '<strong>Type: Unknown</strong><br />';
		}
		
		while (have_posts ()) : the_post ();
			$user = get_userdata ($post->post_author);

			$content .= $post->post_title . ' (<em>' . $user->user_login . '</em>)<br />';

		endwhile;

		$content .= $after_widget;
		
		echo $content;
	}
}
?>