201 lines
6.9 KiB
PHP
201 lines
6.9 KiB
PHP
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<?php
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namespace common\models\relation_presenters;
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use common\models\relation_presenters\comparison\EntitiesComparator;
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use common\models\relation_presenters\comparison\interfaces\IHaveIdentityProp;
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use common\modules\abiturient\models\drafts\DraftsManager;
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use yii\base\ErrorException;
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use yii\base\UserException;
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use yii\db\ActiveRecord;
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use yii\helpers\ArrayHelper;
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abstract class BaseRelationPresenter extends \yii\base\BaseObject
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{
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public $relation_label;
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public $parent_instance;
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public $child_class;
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public $parent_column_name = 'id';
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public $child_column_name;
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public $ignore_in_comparison = false;
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public $find_exists_child = true;
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public $make_new_child = true;
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public $actual_relation_name = null;
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public $props_to_eager_load = null;
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public $get_possible_children_callback = null;
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public function __construct(string $relation_label, $config)
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{
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parent::__construct($config);
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$this->relation_label = $relation_label;
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}
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public function getRelated(ActiveRecord $parent = null)
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{
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throw new ErrorException('Needs implementation');
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}
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protected function requiredSchemaExists(): bool
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{
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$parent_schema = \Yii::$app->db->getTableSchema($this->parent_instance::tableName());
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$child_schema = \Yii::$app->db->getTableSchema($this->child_class::tableName());
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return $parent_schema !== null
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&& $child_schema !== null
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&& isset($parent_schema->columns[$this->parent_column_name])
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&& isset($child_schema->columns[$this->child_column_name]);
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}
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protected function getLinkProviders(ActiveRecord $new_parent, ActiveRecord $old_parent, ActiveRecord $old_child): array
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{
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return [
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function (ActiveRecord $child) {
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return [];
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},
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function (ActiveRecord $child) {
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return [];
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},
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function (ActiveRecord $child) {
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return [];
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}
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];
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}
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protected function unlinkUnusedChildren(ActiveRecord $parent, array $touched_children_ids): void
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{
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throw new ErrorException('Needs implementation');
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}
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private function preparePossibleChildren($new_parent_possible_children): array
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{
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if (!$new_parent_possible_children) {
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$new_parent_possible_children = [];
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}
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if (!is_array($new_parent_possible_children)) {
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$new_parent_possible_children = [$new_parent_possible_children];
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}
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return array_map(function (ActiveRecord $child) {
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$child_identity = null;
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if ($child instanceof IHaveIdentityProp) {
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$child_identity = EntitiesComparator::getExtendedIdentityString($child);
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}
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return [$child_identity, $child];
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}, $new_parent_possible_children);
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}
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private static $_memorized_childrens = [];
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private function getRelationHash(): string
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{
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return md5(static::class . $this->relation_label . $this->parent_instance::tableName() . $this->child_class::tableName());
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}
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protected function getPossibleChild(ActiveRecord $new_parent_instance): array
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{
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if ($this->get_possible_children_callback) {
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$hash = $this->getRelationHash();
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if (!isset(self::$_memorized_childrens[$hash])) {
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self::$_memorized_childrens[$hash] = $this->preparePossibleChildren(($this->get_possible_children_callback)($new_parent_instance));
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}
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return self::$_memorized_childrens[$hash];
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}
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$new_parent_possible_children = $this->getRelated($new_parent_instance);
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return $this->preparePossibleChildren($new_parent_possible_children);
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}
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public function copyRelatedRecords(ActiveRecord $new_parent_instance): array
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{
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$result = [];
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if ($this->requiredSchemaExists()) {
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$touched_children_ids = [];
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$old_parent_children = $this->getRelated($this->parent_instance);
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$new_parent_possible_children = [];
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if ($this->find_exists_child) {
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$new_parent_possible_children = $this->getPossibleChild($new_parent_instance);
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}
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if (!$old_parent_children) {
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$old_parent_children = [];
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}
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if (!is_array($old_parent_children)) {
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$old_parent_children = [$old_parent_children];
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}
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foreach ($old_parent_children as $old_child) {
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$child_copy = null;
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if ($this->find_exists_child) {
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$child_copy = $this->findSuchElementAlreadyCopied($new_parent_possible_children, $old_child, $touched_children_ids);
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}
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[$parent_attrs_provider, $child_attrs_provider, $mediator_provider] = $this->getLinkProviders($new_parent_instance, $this->parent_instance, $old_child);
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if ($this->make_new_child) {
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$child_copy = DraftsManager::makeCopy($old_child, $child_copy, false, $child_attrs_provider);
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}
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if (!$child_copy) {
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\Yii::error("Не удалось выполнить копирование: " . print_r($old_child, true), 'drafts');
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throw new UserException("Произошла ошибка копирования");
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}
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$mediator_provider($child_copy);
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$touched_children_ids[] = DraftsManager::ensurePersisted($child_copy)->id;
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$result = ArrayHelper::merge($result, $parent_attrs_provider($child_copy));
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}
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$this->unlinkUnusedChildren($new_parent_instance, $touched_children_ids);
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if ($this->actual_relation_name) {
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unset($new_parent_instance->{$this->actual_relation_name});
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}
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}
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return $result;
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}
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protected function findSuchElementAlreadyCopied(array $new_parent_possible_children, ActiveRecord $old_child, array $ignored_ids): ?ActiveRecord
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{
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if (!($old_child instanceof IHaveIdentityProp)) {
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return null;
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}
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$old_child_identity = EntitiesComparator::getExtendedIdentityString($old_child);
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foreach ($new_parent_possible_children as [$new_child_identity, $new_child]) {
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if (
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$new_child_identity === $old_child_identity
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&& !in_array($new_child->id, $ignored_ids)
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) {
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return $new_child;
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}
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}
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return null;
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}
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public function getParentColumnsInvolvedInRelation(): array
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{
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return [$this->parent_column_name];
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}
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public function getChildColumnsInvolvedInRelation(): array
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{
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return [$this->child_column_name];
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}
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protected function getMethodNameByProperty(string $property): string
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{
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return 'get' . ucfirst($property);
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}
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}
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