/**
  * Init settings form 
  * @return void
  */
 protected function initFormSettings()
 {
     global $lng, $ilDB;
     include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
     include_once './Services/Search/classes/class.ilSearchSettings.php';
     $settings = new ilSearchSettings();
     $this->form = new ilPropertyFormGUI();
     $this->form->setFormAction($this->ctrl->getFormAction($this, 'updateSettings'));
     $this->form->addCommandButton('updateSettings', $this->lng->txt('save'));
     $this->form->setTitle($this->lng->txt('seas_settings'));
     // Max hits
     $hits = new ilSelectInputGUI($this->lng->txt('seas_max_hits'), 'max_hits');
     $hits->setValue($settings->getMaxHits());
     $hits->setRequired(true);
     for ($value = 5; $value <= 15; $value += 5) {
         $values[$value] = $value;
     }
     $hits->setOptions($values);
     $hits->setInfo($this->lng->txt('seas_max_hits_info'));
     $this->form->addItem($hits);
     // Search type
     $type = new ilRadioGroupInputGUI($this->lng->txt('search_type'), 'search_type');
     if ($settings->enabledLucene()) {
         $type->setValue(ilSearchSettings::LUCENE_SEARCH);
     } elseif ($settings->enabledIndex()) {
         $type->setValue(ilSearchSettings::INDEX_SEARCH);
     } else {
         $type->setValue(ilSearchSettings::LIKE_SEARCH);
     }
     $type->setRequired(true);
     $this->form->addItem($type);
     // Default operator
     $operator = new ilRadioGroupInputGUI($this->lng->txt('lucene_default_operator'), 'operator');
     $operator->setRequired(true);
     $operator->setInfo($this->lng->txt('lucene_default_operator_info'));
     $operator->setValue($settings->getDefaultOperator());
     $and = new ilRadioOption($this->lng->txt('lucene_and'), ilSearchSettings::OPERATOR_AND);
     $operator->addOption($and);
     $or = new ilRadioOption($this->lng->txt('lucene_or'), ilSearchSettings::OPERATOR_OR);
     $operator->addOption($or);
     $this->form->addItem($operator);
     // Item filter
     $if = new ilCheckboxInputGUI($this->lng->txt('search_item_filter_form'), 'if');
     $if->setValue(1);
     $if->setChecked($settings->isLuceneItemFilterEnabled());
     $if->setInfo($this->lng->txt('search_item_filter_form_info'));
     $this->form->addItem($if);
     $filter = $settings->getLuceneItemFilter();
     foreach (ilSearchSettings::getLuceneItemFilterDefinitions() as $obj => $def) {
         $ch = new ilCheckboxInputGUI($this->lng->txt($def['trans']), 'filter[' . $obj . ']');
         if (isset($filter[$obj]) and $filter[$obj]) {
             $ch->setChecked(true);
         }
         $ch->setValue(1);
         $if->addSubItem($ch);
     }
     // hide advanced search
     $cb = new ilCheckboxInputGUI($lng->txt("search_hide_adv_search"), "hide_adv_search");
     $cb->setChecked($settings->getHideAdvancedSearch());
     $this->form->addItem($cb);
     // number of auto complete entries
     $options = array(5 => 5, 10 => 10, 20 => 20, 30 => 30);
     $si = new ilSelectInputGUI($lng->txt("search_auto_complete_length"), "auto_complete_length");
     $si->setOptions($options);
     $val = $settings->getAutoCompleteLength() > 0 ? $settings->getAutoCompleteLength() : 10;
     $si->setValue($val);
     $this->form->addItem($si);
     $direct = new ilRadioOption($this->lng->txt('search_direct'), ilSearchSettings::LIKE_SEARCH, $this->lng->txt('search_like_info'));
     $type->addOption($direct);
     if ($ilDB->getDBType() == 'mysql') {
         $index = new ilRadioOption($this->lng->txt('search_index'), ilSearchSettings::INDEX_SEARCH, $this->lng->txt('search_full_info'));
         $type->addOption($index);
     }
     $lucene = new ilRadioOption($this->lng->txt('search_lucene'), ilSearchSettings::LUCENE_SEARCH, $this->lng->txt('java_server_info'));
     $type->addOption($lucene);
 }