<?php
if(class_exists('Conversation'))
	return;

require_once('boot.php');
require_once('object/BaseObject.php');
require_once('object/Item.php');
require_once('include/text.php');

/**
 * A list of threads
 *
 * We should think about making this a SPL Iterator
 */
class Conversation extends BaseObject {
	private $threads = array();
	private $mode = null;

	public function __construct($mode) {
		$this->mode = $mode;
	}

	/**
	 * Add a thread to the conversation
	 *
	 * Returns:
	 * 		_ The inserted item on success
	 * 		_ false on failure
	 */
	public function add_thread($item) {
		$item_id = $item->get_id();
		if(!$item_id) {
			logger('[ERROR] Conversation::add_thread : Item has no ID!!', LOGGER_DEBUG);
			return false;
		}
		if($this->get_thread($item->get_id())) {
			logger('[WARN] Conversation::add_thread : Thread already exists ('. $item->get_id() .').', LOGGER_DEBUG);
			return false;
		}
		$this->threads[] = $item;
		return end($this->threads);
	}

	/**
	 * Get data in a form usable by a conversation template
	 *
	 * We should find a way to avoid using those arguments (at least most of them)
	 *
	 * Returns:
	 * 		_ The data requested on success
	 * 		_ false on failure
	 */
	public function get_template_data($cmnt_tpl, $alike, $dlike) {
		$result = array();

		foreach($this->threads as $item) {
			if($item->get_network() === NETWORK_MAIL && local_user() != $item->get_uid())
				continue;
			$item_data = $item->get_template_data($cmnt_tpl, $this->mode, $alike, $dlike);
			if(!$item_data) {
				logger('[ERROR] Conversation::get_template_data : Failed to get item template data ('. $item->get_id() .').', LOGGER_DEBUG);
				return false;
			}
			$result[] = $item_data;
		}

		return $result;
	}

	/**
	 * Get a thread based on its item id
	 *
	 * Returns:
	 * 		_ The found item on success
	 * 		_ false on failure
	 */
	private function get_thread($id) {
		foreach($this->threads as $item) {
			if($item->get_id() == $id)
				return $item;
		}

		return false;
	}
}
?>