protected function getFilter()
{
// Initialize some field attributes.
$format = $this->element['format'] ? (string) $this->element['format'] : '%Y-%m-%d';
$attributes = array();
if ($this->element['size']) {
$attributes['size'] = (int) $this->element['size'];
}
if ($this->element['maxlength']) {
$attributes['maxlength'] = (int) $this->element['maxlength'];
}
if ($this->element['filterclass']) {
$attributes['class'] = (string) $this->element['filterclass'];
}
if ((string) $this->element['readonly'] == 'true') {
$attributes['readonly'] = 'readonly';
}
if ((string) $this->element['disabled'] == 'true') {
$attributes['disabled'] = 'disabled';
}
if ($this->element['onchange']) {
$attributes['onchange'] = (string) $this->element['onchange'];
} else {
$attributes['onchange'] = 'document.adminForm.submit()';
}
if ((string) $this->element['placeholder']) {
$attributes['placeholder'] = JText::_((string) $this->element['placeholder']);
}
$name = $this->element['searchfieldname'] ? $this->element['searchfieldname'] : $this->name;
if ($this->element['searchfieldname']) {
$model = $this->form->getModel();
$searchvalue = $model->getState((string) $this->element['searchfieldname']);
} else {
$searchvalue = $this->value;
}
// Get some system objects.
$config = $this->form->getContainer()->platform->getConfig();
$user = $this->form->getContainer()->platform->getUser();
// If a known filter is given use it.
switch (strtoupper((string) $this->element['filter'])) {
case 'SERVER_UTC':
// Convert a date to UTC based on the server timezone.
if ((int) $this->value) {
// Get a date object based on the correct timezone.
$date = $this->form->getContainer()->platform->getDate($searchvalue, 'UTC');
$date->setTimezone(new \DateTimeZone($config->get('offset')));
// Transform the date string.
$searchvalue = $date->format('Y-m-d H:i:s', true, false);
}
break;
case 'USER_UTC':
// Convert a date to UTC based on the user timezone.
if ((int) $searchvalue) {
// Get a date object based on the correct timezone.
$date = $this->form->getContainer()->platform->getDate($this->value, 'UTC');
$date->setTimezone(new \DateTimeZone($user->getParam('timezone', $config->get('offset'))));
// Transform the date string.
$searchvalue = $date->format('Y-m-d H:i:s', true, false);
}
break;
}
return JHtml::_('calendar', $searchvalue, $name, $name, $format, $attributes);
}
