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application/Espo/Modules/Crm/Tools/Case/Distribution/RoundRobin.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * 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\Modules\Crm\Tools\Case\Distribution;
+
+use Espo\Entities\User;
+use Espo\Entities\Team;
+use Espo\Modules\Crm\Entities\CaseObj;
+use Espo\ORM\EntityManager;
+
+class RoundRobin
+{
+    public function __construct(private EntityManager $entityManager)
+    {}
+
+    public function getUser(Team $team, ?string $targetUserPosition = null): ?User
+    {
+        $where = [
+            'isActive' => true,
+        ];
+
+        if (!empty($targetUserPosition)) {
+            $where['@relation.role'] = $targetUserPosition;
+        }
+
+        $userList = $this->entityManager
+            ->getRDBRepositoryByClass(Team::class)
+            ->getRelation($team, 'users')
+            ->where($where)
+            ->order('id')
+            ->find();
+
+        if (count($userList) === 0) {
+            return null;
+        }
+
+        $userIdList = [];
+
+        foreach ($userList as $user) {
+            $userIdList[] = $user->getId();
+        }
+
+        /** @var ?CaseObj $case */
+        $case = $this->entityManager
+            ->getRDBRepository(CaseObj::ENTITY_TYPE)
+            ->where([
+                'assignedUserId' => $userIdList,
+            ])
+            ->order('number', 'DESC')
+            ->findOne();
+
+        if (empty($case)) {
+            $num = 0;
+        } else {
+            $num = array_search($case->getAssignedUser()?->getId(), $userIdList);
+
+            if ($num === false || $num == count($userIdList) - 1) {
+                $num = 0;
+            } else {
+                $num++;
+            }
+        }
+
+        $id = $userIdList[$num];
+
+        /** @var User */
+        return $this->entityManager->getEntityById(User::ENTITY_TYPE, $id);
+    }
+}