silverstripe-gridfieldexten.../code/GridFieldAddExistingSearchHandler.php

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<?php
/**
* Used by {@link GridFieldAddExistingSearchButton} to provide the searching
* functionality.
*/
class GridFieldAddExistingSearchHandler extends RequestHandler {
private static $allowed_actions = array(
'index',
'add',
'SearchForm'
);
/**
* @var GridField
*/
protected $grid;
/**
* @var GridFieldAddExistingSearchButton
*/
protected $button;
/**
* @var SearchContext
*/
protected $context;
public function __construct($grid, $button) {
$this->grid = $grid;
$this->button = $button;
$this->context = singleton($grid->getModelClass())->getDefaultSearchContext();
parent::__construct();
}
public function index() {
return $this->renderWith('GridFieldAddExistingSearchHandler');
}
public function add($request) {
if(!$id = $request->postVar('id')) {
$this->httpError(400);
}
$list = $this->grid->getList();
$item = DataList::create($list->dataClass())->byID($id);
if(!$item) {
$this->httpError(400);
}
$list->add($item);
}
/**
* @return Form
*/
public function SearchForm() {
$form = new Form(
$this,
'SearchForm',
$this->context->getFields(),
new FieldList(
FormAction::create('doSearch', _t('GridFieldExtensions.SEARCH', 'Search'))
->setUseButtonTag(true)
->addExtraClass('ss-ui-button')
->setAttribute('data-icon', 'magnifier')
)
);
$form->addExtraClass('stacked add-existing-search-form');
$form->setFormMethod('GET');
return $form;
}
public function doSearch($data, $form) {
$list = $this->context->getQuery($data, false, false, $this->getSearchList());
$list = $list->subtract($this->grid->getList());
$list = new PaginatedList($list, $this->request);
$data = $this->customise(array(
'SearchForm' => $form,
'Items' => $list
));
return $data->index();
}
public function Items() {
$list = $this->getSearchList();
$list = $list->subtract($this->grid->getList());
$list = new PaginatedList($list, $this->request);
return $list;
}
public function Link($action = null) {
return Controller::join_links($this->grid->Link(), 'add-existing-search', $action);
}
/**
* @return DataList
*/
protected function getSearchList() {
return $this->button->getSearchList() ?: DataList::create($this->grid->getList()->dataClass());
}
}