fix(date): format dates for target generation

fix #1050

Signed-off-by: btry <tbugier@teclib.com>

Author: btry

inc/fields/datefield.class.php

@@ -67,6 +67,10 @@ public function getValue() {
       return (strtotime($date) != '') ? $date : null;
    }
 
+   public function prepareQuestionInputForTarget($input) {
+      return Toolbox::addslashes_deep(Html::convDate($input));
+   }
+
    public function getAnswer() {
       return Html::convDate($this->getValue());
    }

inc/fields/datetimefield.class.php

@@ -71,6 +71,10 @@ public function getAnswer() {
       return Html::convDateTime($this->getValue());
    }
 
+   public function prepareQuestionInputForTarget($input) {
+      return Toolbox::addslashes_deep(Html::convDateTime($input));
+   }
+
    public function isValid($value) {
       // If the field is required it can't be empty
       if ($this->isRequired() && (strtotime($value) == '')) {