portal.mkgtu.ru/common/models/relation_presenters/ManyToManyRelationPresenter...

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2024-03-28 09:51:45 +03:00
<?php
namespace common\models\relation_presenters;
use common\models\relation_presenters\comparison\interfaces\IHaveIdentityProp;
use common\modules\abiturient\models\drafts\DraftsManager;
use yii\db\ActiveQuery;
use yii\db\ActiveRecord;
use yii\db\Query;
class ManyToManyRelationPresenter extends BaseRelationPresenter
{
public $via_table;
public $via_table_parent_column;
public $via_table_child_column;
public function __construct(string $relation_label, $config)
{
parent::__construct($relation_label, $config);
if (!$this->ignore_in_comparison && !((new $this->child_class()) instanceof IHaveIdentityProp)) {
throw new \RuntimeException("Class {$this->child_class} needs IHaveIdentityProp implementation");
}
}
public function getRelated(ActiveRecord $parent = null): array
{
if (!$this->requiredSchemaExists()) {
return [];
}
if (is_null($parent)) {
$parent = $this->parent_instance;
}
if ($parent->getIsNewRecord()) {
return [];
}
if ($this->actual_relation_name && !$this->props_to_eager_load) {
return $parent->{$this->actual_relation_name};
} elseif ($this->actual_relation_name && $this->props_to_eager_load) {
$method = $this->getMethodNameByProperty($this->actual_relation_name);
return $parent->{$method}()->with($this->props_to_eager_load)->all();
}
$query = $this->child_class::find();
$child_table_name = $this->child_class::tableName();
$parent_class = get_class($parent);
$parent_table_name = $parent_class::tableName();
$query->innerJoin(['junction' => $this->via_table], "junction.{$this->via_table_child_column} = {$child_table_name}.{$this->child_column_name}");
$query->innerJoin($parent_table_name, "{$parent_table_name}.{$this->parent_column_name} = junction.{$this->via_table_parent_column}");
if ($this->props_to_eager_load) {
$query = $query->with($this->props_to_eager_load);
}
return $query
->andWhere(["{$parent_table_name}.{$this->parent_column_name}" => $parent->{$this->parent_column_name}])
->all();
}
protected function requiredSchemaExists(): bool
{
$parent_schema = \Yii::$app->db->getTableSchema($this->parent_instance::tableName());
$child_schema = \Yii::$app->db->getTableSchema($this->child_class::tableName());
$via_table_schema = \Yii::$app->db->getTableSchema($this->via_table);
return $parent_schema !== null
&& $child_schema !== null
&& $via_table_schema !== null
&& isset($parent_schema->columns[$this->parent_column_name])
&& isset($child_schema->columns[$this->child_column_name])
&& isset($via_table_schema->columns[$this->via_table_parent_column])
&& isset($via_table_schema->columns[$this->via_table_child_column]);
}
protected function getLinkProviders(ActiveRecord $new_parent, ActiveRecord $old_parent, ActiveRecord $old_child): array
{
DraftsManager::ensurePersisted($new_parent);
[$parent_attrs_provider, $child_attrs_provider, $mediator_provider] = parent::getLinkProviders($new_parent, $old_parent, $old_child);
$mediator_provider = function (ActiveRecord $child) use ($new_parent) {
DraftsManager::ensurePersisted($child);
$junction_data = [
$this->via_table_parent_column => $new_parent->{$this->parent_column_name},
$this->via_table_child_column => $child->{$this->child_column_name},
];
$already_linked = (new Query())->from($this->via_table)->andWhere($junction_data)->exists();
if (!$already_linked) {
\Yii::$app->db->createCommand()->insert($this->via_table, $junction_data)->execute();
}
return [];
};
return [$parent_attrs_provider, $child_attrs_provider, $mediator_provider];
}
protected function unlinkUnusedChildren(ActiveRecord $parent, array $touched_children_ids): void
{
if (!$this->requiredSchemaExists()) {
return;
}
if ($parent->getIsNewRecord()) {
return;
}
$child_table_name = $this->child_class::tableName();
if ($this->actual_relation_name) {
$method = $this->getMethodNameByProperty($this->actual_relation_name);
$query = $parent->{$method}();
} else {
$query = $this->child_class::find()
->innerJoin(['junction' => $this->via_table], "junction.{$this->via_table_child_column} = {$child_table_name}.{$this->child_column_name}")
->andWhere(["junction.{$this->via_table_parent_column}" => $parent->{$this->parent_column_name}]);
}
$query = $query
->andWhere(['not', ["{$child_table_name}.{$this->child_column_name}" => $touched_children_ids]]);
foreach ($query->all() as $old_related) {
DraftsManager::SuspendHistory($old_related);
$old_related->delete();
}
\Yii::$app->db->createCommand()->delete($this->via_table, [
'and',
[$this->via_table_parent_column => $parent->{$this->parent_column_name}],
['not', [$this->via_table_child_column => $touched_children_ids]]
])->execute();
}
}