<?php
 
class PlaintextPlugin extends Plugin
{
	/**
	 * function info
	 * Returns information about this plugin
	 * @return array Plugin info array
	 **/
	function info()
	{
		return array (
			'name' => 'Plaintext',
			'url' => 'http://habariproject.org/',
			'author' => 'Owen Winkler',
			'authorurl' => 'http://asymptomatic.net/',
			'version' => '1.0',
			'description' => 'Displays plain text of posts when URL ends in .md',
			'license' => 'Apache License 2.0',
		);
	}
 
	/**
	 * Filter the rewrite rules to add our own new rule based on the existing display_entry rule
	 * @params array $rules An array of RewriteRule objects representing all active rules
	 * @return array An array of RewriteRule objects, including our new rule
	 */	 	 	 	
	function filter_rewrite_rules($rules)
	{
		static $ruleisset = false;
 
		if($ruleisset) {
			return $rules;
		}
 
		foreach($rules as $rule) {
			if($rule->name == 'display_entry') {
				$editrule = clone $rule;
				$delimiter = $editrule->parse_regex[0];
				$insertion_point = strrpos($editrule->parse_regex, $delimiter);
				if($editrule->parse_regex[$insertion_point-1] == '$') {
					$insertion_point--;
				}
				$editrule->parse_regex = substr($editrule->parse_regex, 0, $insertion_point) . '.md' . substr($editrule->parse_regex, $insertion_point);
				$editrule->priority--;
				$editrule->action = 'plaintext';
				$editrule->handler = 'PluginHandler';
 
				$rules[] = $editrule;
			}
		}
 
		$ruleisset = true;
 
		return $rules;
	}	
 
	/**
	 * Respond to the URL that was created
	 * Determine the post that was supposed to be displayed, and show it in raw
	 * @params array $handlervars An array of values passed in from the URL requested
	 */	 	 	 	
	function action_plugin_act_plaintext($handlervars)
	{
		$activetheme = Themes::create();
 
		$user_filters = array(
		 'fetch_fn' => 'get_row',
		 'limit' => 1,
		);
 
		$page_key = array_search( 'page', $activetheme->valid_filters );
		unset( $activetheme->valid_filters[$page_key] );
 
		$user_filters = Plugins::filter( 'template_user_filters', $user_filters );
		$user_filters = array_intersect_key( $user_filters, array_flip( $activetheme->valid_filters ) );
 
		$where_filters = Controller::get_handler()->handler_vars->filter_keys( $activetheme->valid_filters );
 
		$where_filters = $where_filters->merge( $user_filters );
		$where_filters = Plugins::filter( 'template_where_filters', $where_filters );
 
		$post = Posts::get( $where_filters );
 
		header('Content-type: text/plain');
		echo $post->content;
 
		exit;
	}
 
}
?>