Updated LDAP to allow protocol to be specified

As per details by fredericmohr in #236

@@ -18,24 +18,6 @@ class Ldap
      */
     public function connect($hostName, $port)
     {
-        /*
-        * LDAPS is not working because even if port 363 is specified, 
-        * BookStack tries to open a LDAP connection on the LDAPS channel.
-        * The if-clause below fixed this, although it would be better to
-        * change the settings in .env from
-        *   LDAP_SERVER=servername:port
-        * to
-        *   LDAP_SERVER=ldap://servername:389
-        *   LDAP_SERVER=ldaps://servername:363
-        * in order to be compatible with non-standard setups. Currently, 
-        * specifying ldap:// or ldaps:// results in an error because BookStack
-        * splits at ":" and takes the seconds chunk (in this case "//servername"
-        * as the port value.
-        */
-        if ($port == 363)
-        {
-                $hostName = "ldaps://".$hostName;
-        }
         return ldap_connect($hostName, $port);
     }
 

@@ -112,9 +112,13 @@ class LdapService
             throw new LdapException(trans('errors.ldap_extension_not_installed'));
         }
 
-        // Get port from server string if specified.
+        // Get port from server string and protocol if specified.
         $ldapServer = explode(':', $this->config['server']);
-        $ldapConnection = $this->ldap->connect($ldapServer[0], count($ldapServer) > 1 ? $ldapServer[1] : 389);
+        $hasProtocol = preg_match('/^ldaps{0,1}\:\/\//', $this->config['server']) === 1;
+        if (!$hasProtocol) array_unshift($ldapServer, '');
+        $hostName = $ldapServer[0] . ($hasProtocol?':':'') . $ldapServer[1];
+        $defaultPort = $ldapServer[0] === 'ldaps' ? 636 : 389;
+        $ldapConnection = $this->ldap->connect($hostName, count($ldapServer) > 2 ? intval($ldapServer[2]) : $defaultPort);
 
         if ($ldapConnection === false) {
             throw new LdapException(trans('errors.ldap_cannot_connect'));