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diff --git a/lib/public/Files/Template/ITemplateManager.php b/lib/public/Files/Template/ITemplateManager.php
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+++ b/lib/public/Files/Template/ITemplateManager.php
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+<?php
+/*
+ * @copyright Copyright (c) 2021 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+declare(strict_types=1);
+
+
+namespace OCP\Files\Template;
+
+use OCP\Files\GenericFileException;
+
+/**
+ * @since 21.0.0
+ */
+interface ITemplateManager {
+
+	/**
+	 * Register a template type support
+	 *
+	 * @param TemplateFileCreator $templateType
+	 * @since 21.0.0
+	 */
+	public function registerTemplateFileCreator(TemplateFileCreator $templateType): void;
+
+	/**
+	 * Register a custom template provider class that is able to inject custom templates
+	 * in addition to the user defined ones
+	 *
+	 * @param string $providerClass
+	 * @since 21.0.0
+	 */
+	public function registerTemplateProvider(string $providerClass): void;
+
+	/**
+	 * Get a list of available file creators and their offered templates
+	 *
+	 * @return array
+	 * @since 21.0.0
+	 */
+	public function listCreators(): array;
+
+	/**
+	 * @return bool
+	 * @since 21.0.0
+	 */
+	public function hasTemplateDirectory(): bool;
+
+	/**
+	 * @param string $path
+	 * @return void
+	 * @since 21.0.0
+	 */
+	public function setTemplatePath(string $path): void;
+
+	/**
+	 * @return string
+	 * @since 21.0.0
+	 */
+	public function getTemplatePath(): string;
+
+	/**
+	 * @param string $path
+	 * @since 21.0.0
+	 */
+	public function initializeTemplateDirectory(string $path): void;
+
+	/**
+	 * @param string $filePath
+	 * @param string $templateId
+	 * @return array
+	 * @throws GenericFileException
+	 * @since 21.0.0
+	 */
+	public function createFromTemplate(string $filePath, string $templateId = '', string $templateType = 'user'): array;
+}