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<?php
namespace common\modules\language\behaviors;
use common\modules\language\models\Language;
use yii\base\Behavior;
use yii\base\InvalidConfigException;
use yii\db\ActiveQuery;
use yii\db\ActiveRecord;
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use yii\db\Transaction;
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use yii\web\Request;
/**
* Class LanguageBehavior
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* @property ActiveRecord $owner
* @property string $ownerKey
* @property string $langKey
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* @property ActiveRecord[] $langs
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* @property ActiveRecord $lang
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*/
class LanguageBehavior extends Behavior
{
/**
* @var ActiveRecord $object_lang Empty language model for $owner
*/
public $object_lang;
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/**
* @var ActiveRecord[] $model_langs
*/
public $model_langs = [];
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private $_owner_key;
private $_lang_key;
/**
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* @var Transaction $_transaction
*/
private $_transaction;
/**
* @var bool $_transaction_status
*/
private $_transaction_status = false;
public function events()
{
return [
ActiveRecord::EVENT_BEFORE_INSERT => 'beforeSave',
ActiveRecord::EVENT_BEFORE_UPDATE => 'beforeSave',
ActiveRecord::EVENT_AFTER_INSERT => 'afterSave',
ActiveRecord::EVENT_AFTER_UPDATE => 'afterSave',
];
}
/**
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* Get $owner primary key to link language model
* @return string
*/
public function getOwnerKey():string
{
if(!empty( $this->_owner_key )) {
return $this->_owner_key;
} else {
return $this->owner->primaryKey()[ 0 ];
}
}
/**
* Set which attribute to use as $owner primary key to link language model
*
* @param string $value
*/
public function setOwnerKey(string $value)
{
$this->_owner_key = $value;
}
/**
* Get language model attribute that is used as foreign key to $owner
* @return string
*/
public function getLangKey():string
{
if(!empty( $this->_lang_key )) {
return $this->_lang_key;
} else {
$owner = $this->owner;
return $owner::getTableSchema()->name . '_id';
}
}
/**
* Set which attribute to use as language model foreign key to $owner
*
* @param $value
*/
public function setLangKey(string $value)
{
$this->_lang_key = $value;
}
/**
* Additional checks to attach this behavior
*
* @param ActiveRecord $owner
*
* @throws InvalidConfigException
*/
public function attach($owner)
{
if(empty( $this->object_lang )) {
$this->object_lang = $owner::className() . 'Lang';
} elseif(!is_string($this->object_lang)) {
throw new InvalidConfigException('Object lang must be fully classified namespaced classname');
}
try {
$this->object_lang = \Yii::createObject($this->object_lang);
} catch(\ReflectionException $exception) {
throw new InvalidConfigException('Object lang must be fully classified namespaced classname');
}
if(( !$owner instanceof ActiveRecord ) || ( !$this->object_lang instanceof ActiveRecord )) {
throw new InvalidConfigException('Object lang must be fully classified namespaced classname');
}
parent::attach($owner);
}
/**
* Get query to get all language models for $owner indexed by language_id
* @return ActiveQuery
*/
public function getLangs()
{
$object_lang = $this->object_lang;
$owner = $this->owner;
return $owner->hasMany($object_lang::className(), [ $this->getLangKey() => $this->getOwnerKey() ])
->indexBy('language_id');
}
/**
* Get query to get language model for $owner for language_id, default to
* Language::getCurrent()
*
* @param int $language_id
*
* @return ActiveQuery
*/
public function getLang(int $language_id = NULL)
{
if(empty( $language_id )) {
$language_id = Language::getCurrent()->language_id;
}
$object_lang = $this->object_lang;
$table_name = $object_lang::getTableSchema()->name;
$owner = $this->owner;
return $owner->hasOne($object_lang::className(), [ $this->getLangKey() => $this->getOwnerKey() ])
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->where([ $table_name . '.language_id' => $language_id ]);
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}
/**
* Generate language models for $owner for active languages. If $owner not new and language
* models already inserted, models will be filled with them.
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* @return void
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*/
public function generateLangs()
{
$owner = $this->owner;
$languages = Language::find()
->where([ 'status' => true ])
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->orderBy([ 'language_id' => SORT_ASC ])
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->asArray()
->column();
$object_lang = $this->object_lang;
$owner_key = $this->getOwnerKey();
$langs = [];
if(!$owner->isNewRecord) {
$langs = $this->getLangs()
->andFilterWhere([ 'language_id' => $languages ])
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->orderBy([ 'language_id' => SORT_ASC ])
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->all();
}
foreach($languages as $language) {
if(!array_key_exists($language, $langs)) {
$langs[ $language ] = \Yii::createObject([
'class' => $object_lang::className(),
'language_id' => $language,
$this->getLangKey() => ( $owner->isNewRecord ? NULL : $owner->$owner_key ),
]);
}
}
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$this->model_langs = $langs;
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}
/**
* Load language models with post data.
*
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* @param Request $request
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*/
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public function loadLangs(Request $request)
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{
foreach($request->post($this->object_lang->formName(), []) as $lang => $value) {
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if(!empty( $this->model_langs[ $lang ] )) {
$this->model_langs[ $lang ]->attributes = $value;
$this->model_langs[ $lang ]->language_id = $lang;
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}
}
}
/**
* Link language models with $owner by setting language model language key to owner key of
* owner
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* @return bool If $owner is new record then return false else true
*/
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public function linkLangs()
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{
$owner = $this->owner;
if($owner->isNewRecord) {
return false;
}
$lang_key = $this->getLangKey();
$owner_key = $this->getOwnerKey();
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$model_langs = $this->model_langs;
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foreach($model_langs as $model_lang) {
$model_lang->$lang_key = $owner->$owner_key;
}
return true;
}
/**
* Try to save all language models to the db. Validation function is run for all models.
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* @return bool Whether all models are valid
*/
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public function saveLangs()
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{
$success = true;
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$model_langs = $this->model_langs;
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foreach($model_langs as $model_lang) {
if(!$model_lang->save()) {
$success = false;
}
}
return $success;
}
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public function beforeSave($event)
{
/**
* @var ActiveRecord $owner
*/
$owner = $this->owner;
$db = $owner::getDb();
$this->_transaction = $db->beginTransaction();
}
public function afterSave($event)
{
/**
* @var ActiveRecord $owner
*/
$owner = $this->owner;
if(!empty( $this->model_langs )) {
if($this->linkLangs() && $this->saveLangs()) {
$this->_transaction->commit();
$this->_transaction_status = true;
} else {
$this->_transaction->rollBack();
$this->_transaction_status = false;
}
} else {
$this->_transaction->commit();
$this->_transaction_status = true;
}
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if($owner->hasAttribute('remote_id') && empty($owner->remote_id)) {
$owner->remote_id = (int) $owner->primaryKey;
}
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}
/**
* @return bool
*/
public function getTransactionStatus():bool
{
return $this->_transaction_status;
}
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}
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