Initial commit

application/Espo/Core/FieldProcessing/Link/HasOneLoader.php

@@ -0,0 +1,111 @@
+<?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\FieldProcessing\Link;
+
+use Espo\Core\ORM\Type\FieldType;
+use Espo\ORM\Entity;
+use Espo\Core\ORM\Entity as CoreEntity;
+use Espo\Core\FieldProcessing\Loader as LoaderInterface;
+use Espo\Core\FieldProcessing\Loader\Params;
+
+use Espo\ORM\Defs as OrmDefs;
+
+/**
+ * @implements LoaderInterface<Entity>
+ */
+class HasOneLoader implements LoaderInterface
+{
+    private OrmDefs $ormDefs;
+
+    /**
+     * @var array<string, string[]>
+     */
+    private $fieldListCacheMap = [];
+
+    public function __construct(OrmDefs $ormDefs)
+    {
+        $this->ormDefs = $ormDefs;
+    }
+
+    public function process(Entity $entity, Params $params): void
+    {
+        if (!$entity instanceof CoreEntity) {
+            return;
+        }
+
+        foreach ($this->getFieldList($entity->getEntityType()) as $field) {
+            if ($entity->get($field . 'Name')) {
+                continue;
+            }
+
+            $entity->loadLinkField($field);
+        }
+    }
+
+    /**
+     * @return string[]
+     */
+    private function getFieldList(string $entityType): array
+    {
+        if (array_key_exists($entityType, $this->fieldListCacheMap)) {
+            return $this->fieldListCacheMap[$entityType];
+        }
+
+        $list = [];
+
+        $entityDefs = $this->ormDefs->getEntity($entityType);
+
+        foreach ($entityDefs->getFieldList() as $fieldDefs) {
+            if ($fieldDefs->getType() !== FieldType::LINK) {
+                continue;
+            }
+
+            if ($fieldDefs->getParam('noLoad')) {
+                continue;
+            }
+
+            $name = $fieldDefs->getName();
+
+            if (!$entityDefs->hasRelation($name)) {
+                continue;
+            }
+
+            if ($entityDefs->getRelation($name)->getType() !== Entity::HAS_ONE) {
+                continue;
+            }
+
+            $list[] = $name;
+        }
+
+        $this->fieldListCacheMap[$entityType] = $list;
+
+        return $list;
+    }
+}