<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM – Open Source CRM application.
 * Copyright (C) 2014-2024 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Core\Select\Helpers;

use Espo\Core\Name\Field;
use Espo\Entities\User;
use Espo\ORM\Defs;
use Espo\ORM\Query\Part\Condition;
use Espo\ORM\Query\Part\Expression;
use Espo\ORM\Query\Part\WhereItem;
use Espo\ORM\Query\SelectBuilder as QueryBuilder;

/**
 * @since 8.5.0
 */
class RelationQueryHelper
{
    public function __construct(
        private Defs $defs,
    ) {}

    public function prepareAssignedUsersWhere(string $entityType, string $userId): WhereItem
    {
        return $this->prepareRelatedUsersWhere(
            $entityType,
            $userId,
            'assignedUsers',
            User::RELATIONSHIP_ENTITY_USER
        );
    }

    public function prepareCollaboratorsWhere(string $entityType, string $userId): WhereItem
    {
        return $this->prepareRelatedUsersWhere(
            $entityType,
            $userId,
            Field::COLLABORATORS,
            User::RELATIONSHIP_ENTITY_COLLABORATOR
        );
    }

    private function prepareRelatedUsersWhere(
        string $entityType,
        string $userId,
        string $field,
        string $relationship
    ): WhereItem {

        $relationDefs = $this->defs
            ->getEntity($entityType)
            ->getRelation($field);

        $middleEntityType = ucfirst($relationDefs->getRelationshipName());
        $key1 = $relationDefs->getMidKey();
        $key2 = $relationDefs->getForeignMidKey();

        $joinWhere = [
            "m.$key1:" => 'id',
            'm.deleted' => false,
        ];

        if ($middleEntityType === $relationship) {
            $joinWhere['m.entityType'] = $entityType;
        }

        $subQuery = QueryBuilder::create()
            ->select('id')
            ->from($entityType)
            ->leftJoin($middleEntityType, 'm', $joinWhere)
            ->where(["m.$key2" => $userId])
            ->build();

        return Condition::in(
            Expression::column('id'),
            $subQuery
        );
    }
}