<?php

/**
 * Handles controller specific functionality provided by Bedrock, such as RSS feeds
 *
 * @package Bedrock
 */
class BedrockPageController extends Extension 
{
	
	/**
	 * Update the allowed_actions array. This does not work in the normal {@link Bedrock::load()} function
	 * Provide an RSS link in the header, if applicable.
	 */
	public function onAfterInit() {
		if($settings = $this->owner->getClassSettings()) {
			if($rss = $settings->getRSS()) {
				RSSFeed::linkToFeed($this->owner->Link() . "rss", $this->owner->Title);
				Object::addStaticVars($this->owner->class, array (
					'allowed_actions' => array (
						'rss'
					)
				));				
			}
		}		
	}
	
	/**
	 * A controller action that returns a defined RSS feed for this page
	 */
	public function rss()
	{
		if($settings = $this->owner->getClassSettings()) {
			if($rss = $settings->getRSS()) { 	
				$component = $rss->getSubject();
				if($component != "Children") {
					$component = singleton($settings->getKey())->getReverseAssociation($component);
				}
				if($records = $this->owner->{$component}()) {
					$r = new RSSFeed($records, $this->owner->Link(), $rss->getTitle(), $rss->getDescription(), $rss->getTitleField(), $rss->getContentField(), $rss->getAuthorField());
					$r->outputToBrowser();
					return;
				}
			}
		}
		return Director::redirectBack();
	}
	
	/**
	 * The link to the RSS feed. Points to {@link rss}
	 * @return string
	 */
	public function RSSLink() {
		if($settings = $this->owner->getClassSettings()) {
			if($rss = $settings->getRSS()) {
				return $this->owner->Link('rss');
			}
		}
	}

}