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application/Espo/Tools/Attachment/DetailsObtainer.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\Tools\Attachment;
+
+use Espo\Core\Utils\Config;
+use Espo\Core\Utils\Metadata;
+use Espo\Entities\Attachment;
+
+class DetailsObtainer
+{
+    private Metadata $metadata;
+    private Config $config;
+
+    public function __construct(
+        Metadata $metadata,
+        Config $config
+    ) {
+        $this->metadata = $metadata;
+        $this->config = $config;
+    }
+
+    /**
+     * Get a file extension.
+     */
+    public static function getFileExtension(Attachment $attachment): ?string
+    {
+        $name = $attachment->getName() ?? '';
+
+        return array_slice(explode('.', $name), -1)[0] ?? null;
+    }
+
+    /**
+     * Get an upload max size allowed for an attachment (depending on a field it's related to).
+     *
+     * @return int A size in bytes.
+     */
+    public function getUploadMaxSize(Attachment $attachment): int
+    {
+        if ($attachment->getRole() === Attachment::ROLE_INLINE_ATTACHMENT) {
+            return $this->config->get('inlineAttachmentUploadMaxSize') * 1024 * 1024;
+        }
+
+        $field = $attachment->getTargetField();
+        $parentType = $attachment->getParentType() ?? $attachment->getRelatedType();
+
+        if ($field && $parentType) {
+            $maxSize = ($this->metadata
+                ->get(['entityDefs', $parentType, 'fields', $field, 'maxFileSize']) ?? 0) * 1024 * 1024;
+
+            if ($maxSize) {
+                return $maxSize;
+            }
+        }
+
+        return (int) $this->config->get('attachmentUploadMaxSize', 0) * 1024 * 1024;
+    }
+
+    /**
+     * Get a field type (an attachment if related to another record through the field).
+     */
+    public function getFieldType(Attachment $attachment): ?string
+    {
+        $field = $attachment->getTargetField();
+        $entityType = $attachment->getParentType() ?? $attachment->getRelatedType();
+
+        if (!$field || !$entityType) {
+            return null;
+        }
+
+        return $this->metadata->get(['entityDefs', $entityType, 'fields', $field, 'type']);
+    }
+}