Passwort reset

php/php-dog/classes/lib.php

@@ -119,6 +119,34 @@ function getNewFilename($targetDir, $fileExt, $length)
     return $newFname .".".$fileExt;
 }
 
+function getNewPwtoken($length, $conn)
+{
+    $newToken = random_str($length);
+
+    $maxtries = 100000; // prevent endless loop, most unlikely 
+    $tries = 0;
+
+    do 
+    {
+        $stmt = $conn->prepare("SELECT id FROM `dogs` WHERE `pwtoken`=?");
+        $stmt->execute([$newToken]); 
+
+        if ($stmt->rowCount() == 0) 
+        {
+            break;
+        }
+        $newToken = random_str($length);
+        echo ('newToken ' . $newToken);
+        ++$tries;
+    } while ($tries <= $maxtries);
+
+    if($tries >= $maxtries)
+    {
+        $newToken = "";
+    }
+    return $newToken;
+}
+
 function getDogByQrId($qr_id, $conn, $fields = null)
 {
     if(strcmp($qr_id, 'SESS') === 0)