DateTimePicker use config value for timepicker_increment - refs BT#19479

main/inc/lib/formvalidator/Element/DateRangePicker.php

@@ -182,10 +182,7 @@ class DateRangePicker extends HTML_QuickForm_text
             $timePicker = 'false';
         }
 
-        $timeIncrement = 30;
-        if (api_get_configuration_value('timepicker_increment')) {
-            $timeIncrement = api_get_configuration_value('timepicker_increment');
-        }
+        $timeIncrement = FormValidator::getTimepickerIncrement();
 
         // timeFormat: 'hh:mm'
         $js .= "<script>

main/inc/lib/formvalidator/Element/DateTimePicker.php

@@ -134,6 +134,8 @@ class DateTimePicker extends HTML_QuickForm_text
      */
     private function getElementJS()
     {
+        $timeIncrement = FormValidator::getTimepickerIncrement();
+
         $js = null;
         $id = $this->getAttribute('id');
         //timeFormat: 'hh:mm'
@@ -151,6 +153,7 @@ class DateTimePicker extends HTML_QuickForm_text
                         dateFormat: 'yy-mm-dd',
                         controlType: 'select',
                         oneLine: true,
+                        stepMinute: $timeIncrement,
                         timeFormat: 'HH:mm',
                         altField: '#{$id}_alt',
                         altFormat: \"".get_lang('DateFormatLongNoDayJS')."\",

main/inc/lib/formvalidator/FormValidator.class.php

@@ -16,6 +16,8 @@ class FormValidator extends HTML_QuickForm
     public const LAYOUT_BOX_NO_LABEL = 'box-no-label';
     public const LAYOUT_GRID = 'grid';
 
+    public const TIMEPICKER_INCREMENT_DEFAULT = 15;
+
     public $with_progress_bar = false;
     private $layout;
 
@@ -1791,6 +1793,17 @@ EOT;
         }
     }
 
+    public static function getTimepickerIncrement(): int
+    {
+        $customIncrement = api_get_configuration_value('timepicker_increment');
+
+        if (false !== $customIncrement) {
+            return (int) $customIncrement;
+        }
+
+        return self::TIMEPICKER_INCREMENT_DEFAULT;
+    }
+
     /**
      * @param string $url           page that will handle the upload
      * @param string $inputName