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common/modules/language/behaviors/LanguageBehavior.php 9.39 KB
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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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      }