Add storage options form in admin/site page

src/Model/Storage/IStorage.php

@@ -32,4 +32,58 @@ interface IStorage
 	 * @return boolean  True on success
 	 */
 	public static function delete($ref);
+	
+	/**
+	 * @brief Get info about storage options
+	 *
+	 * @return array
+	 *
+	 * This method return an array with informations 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', 'yesno'
+	 *
+	 *      '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
+	 *                   // yesno: array [ 'label no', 'label yes']
+	 *    ]
+	 *
+	 * See https://github.com/friendica/friendica/wiki/Quick-Template-Guide
+	 */
+	public static function getOptions();
+	
+	/**
+	 * @brief Validate and save options
+	 *
+	 * @param array  $data  Array [optionname => value] to be saved
+	 *
+	 * @return array  Validation errors: [optionname => error message]
+	 *
+	 * Return array must be empty if no error.
+	 */
+	public static function saveOptions($data);
+	
 }
+
+