CDavExchangeCalendar::GetUsersEmailMap

static function GetUsersEmailMap($emailList = [])
	{
		global $DB;
		$emailMap = [];

		if (CCalendar::IsSocNet())
		{
			$exchangeMailbox = COption::GetOptionString("dav", "exchange_mailbox", "");
			$exchangeUseLogin = COption::GetOptionString("dav", "exchange_use_login", "Y");
			$exchangeMailboxStrlen = mb_strlen($exchangeMailbox);

			$strValue = "";
			foreach($emailList as $email)
			{
				$strValue .= ",'".$DB->ForSql($email)."'";
			}
			$strValue = trim($strValue, ', ');

			if ($strValue != '')
			{
				$strSql = "SELECT U.ID, BUF.UF_BXDAVEX_MAILBOX
					FROM b_user U
					LEFT JOIN b_uts_user BUF ON (BUF.VALUE_ID = U.ID)
					WHERE
						U.ACTIVE = 'Y' AND
						BUF.UF_BXDAVEX_MAILBOX in (".$strValue.")";

				$res = $DB->Query($strSql, false, "File: ".__FILE__."
Line: ".__LINE__);
				$checkedEmails = [];
				while ($entry = $res->Fetch())
				{
					$checkedEmails[] = mb_strtolower($entry["UF_BXDAVEX_MAILBOX"]);
					//$users[] = $entry['ID'];
					$emailMap[mb_strtolower($entry["UF_BXDAVEX_MAILBOX"])] = $entry['ID'];
				}

				if ($exchangeUseLogin === "Y")
				{
					$strLogins = '';
					foreach($emailList as $email)
					{
						if(
							!in_array(mb_strtolower($email), $checkedEmails)
							&& mb_strtolower(mb_substr($email, mb_strlen($email) - $exchangeMailboxStrlen)) == mb_strtolower($exchangeMailbox)
						)
						{
							$value = mb_substr($email, 0, mb_strlen($email) - $exchangeMailboxStrlen);
							$strLogins .= ",'".$DB->ForSql($value)."'";
						}
					}
					$strLogins = trim($strLogins, ', ');

					if ($strLogins !== '')
					{
						$res = $DB->Query("SELECT U.ID, U.LOGIN FROM b_user U WHERE U.ACTIVE = 'Y' AND U.LOGIN in (".$strLogins.")", false, "File: ".__FILE__."
Line: ".__LINE__);

						while($entry = $res->Fetch())
						{
							//$users[] = $entry['ID'];
							$emailMap[mb_strtolower($entry["LOGIN"].$exchangeMailbox)] = $entry['ID'];
						}
					}
				}
			}
		}

		return $emailMap;
	}