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application/Espo/Core/Acl/OwnerUserFieldProvider.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\Core\Acl;
+
+use Espo\Core\Name\Field;
+use Espo\Core\ORM\Type\FieldType;
+use Espo\Core\Utils\Metadata;
+use Espo\Entities\User;
+use Espo\ORM\Defs;
+
+class OwnerUserFieldProvider
+{
+    protected const FIELD_ASSIGNED_USERS = Field::ASSIGNED_USERS;
+    protected const FIELD_ASSIGNED_USER = Field::ASSIGNED_USER;
+    protected const FIELD_CREATED_BY = Field::CREATED_BY;
+
+    public function __construct(private Defs $ormDefs, private Metadata $metadata)
+    {}
+
+    /**
+     * Get an entity field that stores an owner-user (or multiple users).
+     * Must be a link or linkMultiple field. NULL means no owner.
+     */
+    public function get(string $entityType): ?string
+    {
+        $value = $this->metadata->get(['aclDefs', $entityType, 'readOwnerUserField']);
+
+        if ($value) {
+            return $value;
+        }
+
+        $defs = $this->ormDefs->getEntity($entityType);
+
+        if (
+            $defs->hasField(self::FIELD_ASSIGNED_USERS) &&
+            $defs->getField(self::FIELD_ASSIGNED_USERS)->getType() === FieldType::LINK_MULTIPLE &&
+            $defs->hasRelation(self::FIELD_ASSIGNED_USERS) &&
+            $defs->getRelation(self::FIELD_ASSIGNED_USERS)->getForeignEntityType() === User::ENTITY_TYPE
+        ) {
+            return self::FIELD_ASSIGNED_USERS;
+        }
+
+        if (
+            $defs->hasField(self::FIELD_ASSIGNED_USER) &&
+            $defs->getField(self::FIELD_ASSIGNED_USER)->getType() === FieldType::LINK &&
+            $defs->hasRelation(self::FIELD_ASSIGNED_USER) &&
+            $defs->getRelation(self::FIELD_ASSIGNED_USER)->getForeignEntityType() === User::ENTITY_TYPE
+        ) {
+            return self::FIELD_ASSIGNED_USER;
+        }
+
+        if (
+            $defs->hasField(self::FIELD_CREATED_BY) &&
+            $defs->getField(self::FIELD_CREATED_BY)->getType() === FieldType::LINK &&
+            $defs->hasRelation(self::FIELD_CREATED_BY) &&
+            $defs->getRelation(self::FIELD_CREATED_BY)->getForeignEntityType() === User::ENTITY_TYPE
+        ) {
+            return self::FIELD_CREATED_BY;
+        }
+
+        return null;
+    }
+}