Split Storage usage and Storage configuration

src/Model/Storage/IStorageConfiguration.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2021, the Friendica project
+ *
+ * @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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Model\Storage;
+
+/**
+ * The interface to use for configurable storage backends
+ */
+interface IStorageConfiguration
+{
+	/**
+	 * Get info about storage options
+	 *
+	 * @return array
+	 *
+	 * This method return an array with information about storage options
+	 * from which the form presented to the user is build.
+	 *
+	 * The returned array is:
+	 *
+	 *    [
+	 *      'option1name' => [ ..info.. ],
+	 *      'option2name' => [ ..info.. ],
+	 *      ...
+	 *    ]
+	 *
+	 * An empty array can be returned if backend doesn't have any options
+	 *
+	 * The info array for each option MUST be as follows:
+	 *
+	 *    [
+	 *      'type',      // define the field used in form, and the type of data.
+	 *                   // one of 'checkbox', 'combobox', 'custom', 'datetime',
+	 *                   // 'input', 'intcheckbox', 'password', 'radio', 'richtext'
+	 *                   // 'select', 'select_raw', 'textarea'
+	 *
+	 *      'label',     // Translatable label of the field
+	 *      'value',     // Current value
+	 *      'help text', // Translatable description for the field
+	 *      extra data   // Optional. Depends on 'type':
+	 *                   // select: array [ value => label ] of choices
+	 *                   // intcheckbox: value of input element
+	 *                   // select_raw: prebuild html string of < option > tags
+	 *    ]
+	 *
+	 * See https://github.com/friendica/friendica/wiki/Quick-Template-Guide
+	 */
+	public function getOptions(): array;
+
+	/**
+	 * Validate and save options
+	 *
+	 * @param array $data Array [optionname => value] to be saved
+	 *
+	 * @return array  Validation errors: [optionname => error message]
+	 *
+	 * Return array must be empty if no error.
+	 */
+	public function saveOptions(array $data): array;
+}