<?php

namespace Bitrix\Dav;

use Bitrix\Main\Authentication\ApplicationPasswordTable;
use Bitrix\Main\Type\DateTime;
use Bitrix\Main\UrlRewriter;
use Bitrix\Main\Localization\Loc;
use Bitrix\Main\Context;

Loc::loadMessages(__FILE__);

/**
 * Class Application
 * @package Bitrix\Dav
 */
class Application extends \Bitrix\Main\Authentication\Application
{
	/**
	 * Application passwords event handler.
	 * @return array
	 */
	public static function onApplicationsBuildList()
	{
		return array(
			array(
				"ID" => "caldav",
				"NAME" => Loc::getMessage("dav_app_calendar"),
				"DESCRIPTION" => Loc::getMessage("dav_app_calendar_desc"),
				"SORT" => 100,
				"OPTIONS" => array(Loc::getMessage("dav_app_calendar_phone")),
				"CLASS" => "\\Bitrix\\Dav\\Application"
			),
			array(
				"ID" => "carddav",
				"NAME" => Loc::getMessage("dav_app_card"),
				"DESCRIPTION" => Loc::getMessage("dav_app_card_desc"),
				"SORT" => 200,
				"OPTIONS" => array(Loc::getMessage("dav_app_calendar_phone")),
				"CLASS" => "\\Bitrix\\Dav\\Application"
			),
			array(
				"ID" => "webdav",
				"NAME" => Loc::getMessage("dav_app_doc"),
				"DESCRIPTION" => Loc::getMessage("dav_app_doc_desc"),
				"SORT" => 300,
				"OPTIONS" => array(Loc::getMessage("dav_app_doc_office")),
				"CLASS" => "\\Bitrix\\Dav\\Application"
			),
		);
	}

	/**
	 * Application constructor.
	 */
	public function __construct()
	{
		$this->validUrls = array("/bitrix/groupdav.php", "/index.php", "/.well-known");

		$site = \Bitrix\Main\Application::getInstance()->getContext()->getSite();

		if (!empty($site))
		{
			$urls = UrlRewriter::getList($site);
			foreach ($urls as $url)
			{
				if (in_array($url['ID'], array('bitrix:socialnetwork_user', 'bitrix:socialnetwork_group', 'bitrix:disk.common', 'bitrix:webdav')))
					$this->validUrls[] = $url['PATH'];
			}
		}
	}

	/**
	 * Checks the valid scope for the applicaton.
	 *
	 * @return bool
	 */
	public function checkScope()
	{
		if (parent::checkScope())
		{
			if (static::checkDavHeaders())
				return true;
		}

		return false;
	}

	/**
	 * @return bool
	 */
	public static function checkDavHeaders()
	{
		$server = Context::getCurrent()->getServer();
		$davHeaders = array("DAV", "IF", "DEPTH", "OVERWRITE", "DESTINATION", "LOCK_TOKEN", "TIMEOUT", "STATUS_URI");
		foreach ($davHeaders as $header)
		{
			if ($server->get("HTTP_" . $header))
				return true;
		}

		$davMethods = array("OPTIONS", "PUT", "PROPFIND", "REPORT", "PROPPATCH", "MKCOL", "COPY", "MOVE", "LOCK", "UNLOCK", "DELETE", "COPY", "MOVE");
		foreach ($davMethods as $method)
		{
			if ($server->getRequestMethod() == $method)
				return true;
		}


		$userAgentParam = $server->get('HTTP_USER_AGENT');
		$userAgentString = $userAgentParam ?: '';
		if (strpos($userAgentString, "Microsoft Office") !== false &&
			strpos($userAgentString, "Outlook") === false
			||
			strpos($userAgentString, "MiniRedir") !== false
			||
			strpos($userAgentString, "WebDAVFS") !== false
			||
			strpos($userAgentString, "davfs2") !== false
			||
			strpos($userAgentString, "Sardine") !== false
			||
			strpos($userAgentString, "gvfs") !== false
			||
			strpos($userAgentString, "LibreOffice") !== false
		)
		{
			return true;
		}

		return false;
	}


	/**
	 * Generates AP for REST access.
	 *
	 * @param int $userId Id of password owner user.
	 * @param string $appId Type of application(caldav, carddav, webdav).
	 * @return bool|string password or false
	 */
	public static function generateAppPassword($userId, $appId)
	{

		$password = ApplicationPasswordTable::generatePassword();
		$message = Loc::getMessage('DAV_APP_SYSCOMMENT');
		if ($appId)
		{
			$typeTitle = Loc::getMessage('DAV_APP_TYPE_' . $appId);
			if (strlen($typeTitle) > 0)
			{
				$message = Loc::getMessage('DAV_APP_SYSCOMMENT_TYPE', array(
					'#TYPE#' => $typeTitle,
				));
			}
		}


		$res = ApplicationPasswordTable::add(array(
			'USER_ID' => $userId,
			'APPLICATION_ID' => $appId,
			'PASSWORD' => $password,
			'DATE_CREATE' => new DateTime(),
			'COMMENT' => Loc::getMessage('DAV_APP_COMMENT'),
			'SYSCOMMENT' => $message,
		));

		if ($res->isSuccess())
		{
			return $password;
		}

		return false;
	}
}