silverstripe-gridfieldexten.../src/GridFieldAddExistingSearchHandler.php

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<?php
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namespace Symbiote\GridFieldExtensions;
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use SilverStripe\Control\Controller;
use SilverStripe\Control\RequestHandler;
use SilverStripe\Forms\FieldList;
use SilverStripe\Forms\Form;
use SilverStripe\Forms\FormAction;
use SilverStripe\Forms\GridField\GridField;
use SilverStripe\ORM\DataList;
use SilverStripe\ORM\PaginatedList;
use SilverStripe\ORM\Search\SearchContext;
/**
* Used by {@link GridFieldAddExistingSearchButton} to provide the searching
* functionality.
*/
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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 $this->renderWith(__CLASS__);
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}
public function add($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()
{
$form = Form::create(
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$this,
'SearchForm',
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$this->context->getFields(),
FieldList::create(
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FormAction::create('doSearch', _t('GridFieldExtensions.SEARCH', 'Search'))
->setUseButtonTag(true)
->addExtraClass('btn btn-primary font-icon-search')
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)
);
$form->addExtraClass('stacked add-existing-search-form form--no-dividers');
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$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());
}
}