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<?php
namespace common\components\artboxtree;
use Yii;
use yii\base\Widget;
use yii\i18n\Formatter;
use yii\base\InvalidConfigException;
class ArtboxTreeWidget extends Widget
{
/**
* @var \yii\data\DataProviderInterface the data provider for the view. This property is required.
*/
public $dataProvider;
/**
* @var string
*/
public $keyNameId = 'id';
/**
* @var string
*/
public $keyNameParentId = 'parent_id';
/**
* @var integer or null
*/
public $maxLevel = null;
/**
* @var integer
*/
public $rootParentId = 0;
/**
* @var string
*/
public $emptyResult;
/**
* @var boolean include the CSS and JS files. Default is true.
* If this is set false, you are responsible to explicitly include the necessary CSS and JS files in your page.
*/
public $assetBundle;
/**
* @var array|Formatter the formatter used to format model attribute values into displayable texts.
* This can be either an instance of [[Formatter]] or an configuration array for creating the [[Formatter]]
* instance. If this property is not set, the "formatter" application component will be used.
*/
public $formatter;
/**
* Init the widget object.
*/
public function init()
{
parent::init();
if ($this->dataProvider === null) {
throw new InvalidConfigException('The "dataProvider" property must be set.');
}
if ($this->keyNameId === null) {
throw new InvalidConfigException('The "keyNameId" property must be set.');
}
if ($this->formatter == null) {
$this->formatter = Yii::$app->getFormatter();
} elseif (is_array($this->formatter)) {
$this->formatter = Yii::createObject($this->formatter);
}
if (!$this->formatter instanceof Formatter) {
throw new InvalidConfigException('The "formatter" property must be either a Format object or a configuration array.');
}
}
/**
* Runs the widget.
*/
public function run()
{
if (!empty($this->assetBundle) && class_exists($this->assetBundle)) {
$view = $this->getView();
$assetBundle = $this->assetBundle;
$assetBundle::register($view);
}
if ($this->dataProvider->getCount() == 0) {
return $this->renderEmptyResult();
}
parent::run();
}
protected function renderEmptyResult() {
return empty($this->emptyResult) ? Yii::t('artbox', 'TreeViewEmptyResult') : Yii::t('artbox', $this->emptyResult);
}
/**
* Normalize tree data
* @param array $data
* @param string $parentId
* @return array
*/
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protected function normalizeTreeData(array $data, $parentId = null) {
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$result = [];
foreach ($data as $element) {
if ($element[$this->keyNameParentId] == $parentId) {
$result[] = $element;
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$children = $this->normalizeTreeData($data, $element[$this->keyNameId]);
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if ($children) {
$result = array_merge($result, $children);
}
}
}
return $result;
}
/**
* Hierarchy tree data
* @param array $data
* @param string $parentId
* @return array
*/
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protected function hierarchyTreeData(array $data, $parentId = null) {
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$result = [];
foreach ($data as $element) {
if ($element[$this->keyNameParentId] == $parentId) {
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$children = $this->hierarchyTreeData($data, $element[$this->keyNameId]);
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$result[] = [
'item' => $element,
'children' => $children
];
}
}
return $result;
}
}
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