<?php

/**
 * ownCloud - Documents App
 *
 * @author Victor Dubiniuk
 * @copyright 2013 Victor Dubiniuk victor.dubiniuk@gmail.com
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 */

namespace OCA\Documents;

class SessionController extends Controller{
	
	public static function start($args){
		$uid = self::preDispatch();
		try{
			$path = \OC\Files\Filesystem::getPath(@$_POST['fileid']);
			if (!$path){
				throw new \Exception('No file has been passed');
			}

			$info = \OC\Files\Filesystem::getFileInfo($path);
			if (!$info){
				// Is it shared?
				//searchByMime returns incorrect path for shared items
				//
				if (substr($path, 0, 14) === '/Shared/files/'){
					// remove 'files/' from path as it's relative to '/Shared'
					$path = '/Shared' . substr($path, 13); 
					$sharedInfo = \OC\Files\Filesystem::getFileInfo($path);
					$fileId = $sharedInfo['fileid'];
					
				}
			} else {
				$fileId = $info['fileid'];
			}
			
			
			$session = Session::getSessionByFileId($fileId);
			//If there is no existing session we need to start a new one
			if (!$session || empty($session)){

				$documentsView = View::initDocumentsView($uid);
				$genesisPath = View::storeDocument($uid, $path);

				if (!$genesisPath){
					throw new \Exception('Unable to copy document. Check permissions and make sure you have enought free space.');
				}

				$hash = View::getHashByGenesis($uid, $genesisPath);
				$session = Session::add($genesisPath, $hash, $fileId);
			}

			$session['member_id'] = (string) Member::add($session['es_id'], $uid, Helper::getRandomColor());
			\OCP\JSON::success($session);
			exit();
		} catch (\Exception $e){
			Helper::warnLog('Starting a session failed. Reason: ' . $e->getMessage());
			\OCP\JSON::error();
			exit();
		}
	}

	public static function join($args){
		$esId = @$args['es_id'];
		$uid = self::preDispatch();
		try{
			if (!$esId){
				throw new \Exception('Session id is empty');
			}

			$session = Session::getSession($esId);
			if (!$session || empty($session)){
				throw new \Exception('Session doesn\'t exist');
			}

			$session['member_id'] = (string) Member::add($session['es_id'], $uid, Helper::getRandomColor());
			\OCP\JSON::success($session);
			exit();
		} catch (\Exception $e){
			Helper::warnLog('Joining a session failed. Reason:' . $e->getMessage());
			\OCP\JSON::error(array('message'=>$e->getMessage()));
			exit();
		}
	}
	
	/**
	 * Store the document content to its origin
	 */
	public static function save(){
		$uid = self::preDispatch();
		$sessionID = @$_SERVER['HTTP_WEBODF_SESSION_ID'];
		$memberId = @$_SERVER['HTTP_WEBODF_MEMBER_ID'];
		$sessionRevision = @$_SERVER['HTTP_WEBODF_SESSION_REVISION'];
		$content = fopen('php://input','r');
		if ($sessionID && $content){
			$session = Session::getSession($sessionID);
			$fileInfo = \OC\Files\Cache\Cache::getById($session['file_id']);
			$path = $fileInfo[1];
			$view = new \OC\Files\View('/' . $session['owner']);

			$canWrite = ($view->file_exists($path) && $view->isUpdatable($path)) || $view->isCreatable($path);
			if ($canWrite){
				$view->file_put_contents($path, $content);
			} else {
				// TODO: report an error, break a plate, burn a house, conquer the galaxy
			}
		}
	}
	
	public static function info(){
		self::preDispatch();
		$items = @$_POST['items'];
		$info = array();

		if (is_array($items)){
			$info = Session::getInfoByFileid($items);
		}

		\OCP\JSON::success(array(
			"info" => $info
		));
	}
	
	public static function listAll(){
		self::preDispatch();
		$sessions = Session::getAll();
		if (!is_array($sessions)){
			$sessions = array();
		}

		$preparedSessions = array_map(
				function($x){
					return ($x['es_id']);
				}, $sessions
		);
		\OCP\JSON::success(array(
			"session_list" => $preparedSessions
		));
	}

	public static function listAllHtml(){
		self::preDispatch();
		$sessions = Session::getAll();
		if (!is_array($sessions)){
			$sessions = array();
		}

		$preparedSessions = array_map(
				function($x){
					return ($x['es_id']);
				}, $sessions
		);

		$invites = Invite::getAllInvites();
		if (!is_array($invites)){
			$invites = array();
		}

		$tmpl = new \OCP\Template('documents', 'part.sessions', '');
		$tmpl->assign('invites', $invites);
		$tmpl->assign('sessions', $sessions);
		echo $tmpl->fetchPage();
	}

}