fix LDAP install for systems without ldap extension (#846)

src/Ldap/LdapDriver.php

@@ -9,6 +9,7 @@
 
 namespace App\Ldap;
 
+use App\Configuration\LdapConfiguration;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Zend\Ldap\Exception\LdapException;
@@ -22,20 +23,22 @@ class LdapDriver
     /**
      * @var Ldap
      */
-    private $driver;
+    protected $driver;
 
     /**
      * @var LoggerInterface
      */
     private $logger;
 
-    /**
-     * @param Ldap $driver Initialized Zend::Ldap Object
-     * @param LoggerInterface $logger optional logger for write debug messages
-     */
-    public function __construct(Ldap $driver, LoggerInterface $logger = null)
+    public function __construct(LdapConfiguration $config, LoggerInterface $logger = null)
     {
-        $this->driver = $driver;
+        if (!class_exists('Zend\Ldap\Ldap')) {
+            throw new \Exception(
+                'Zend\Ldap\Ldap is missing, install it with "composer require zendframework/zend-ldap" ' .
+                'or deactivate LDAP, see https://www.kimai.org/documentation/ldap.html'
+            );
+        }
+        $this->driver = new Ldap($config->getConnectionParameters());
         $this->logger = $logger;
     }
 
@@ -64,7 +67,7 @@ class LdapDriver
             // searchEntries don't return 'count' key as specified by php native function ldap_get_entries()
             $entries['count'] = count($entries);
         } catch (LdapException $exception) {
-            $this->zendExceptionHandler($exception);
+            $this->ldapExceptionHandler($exception);
 
             throw new LdapDriverException('An error occurred with the search operation.');
         }
@@ -85,16 +88,13 @@ class LdapDriver
 
             return $bind instanceof Ldap;
         } catch (LdapException $exception) {
-            $this->zendExceptionHandler($exception, $password);
+            $this->ldapExceptionHandler($exception, $password);
         }
 
         return false;
     }
 
-    /**
-     * Treat a Zend Ldap Exception.
-     */
-    protected function zendExceptionHandler(LdapException $exception, string $password = null): void
+    protected function ldapExceptionHandler(LdapException $exception, string $password = null): void
     {
         $sanitizedException = null !== $password ? new SanitizingException($exception, $password) : $exception;