Make instance configuration saveable

api/v1/config/put/index.php

@@ -0,0 +1,23 @@
+<?php chdir('../../../../') ?>
+<?php require 'base.php' ?>
+<?php
+
+$software = trim($_GET['software']);
+if (!in_array($software, $supported_ap_software))
+	apiresult(['error' => 'software type is not supported'], 400);
+
+$instance = trim($_GET['instance']);
+if (!preg_match('/^[a-zA-Z0-9\.\-\_]+$/', $instance))
+	apiresult(['error' => 'instance parameter is not correctly formatted'], 400);
+
+$string = '';
+foreach ($_POST as $k => $v) {
+	if (trim($v) === '')
+		continue;
+	$string .= strtolower(trim($k)).'='.trim($v)."\n";
+}
+
+$config_file = $appconf['data_dir'].'/instances/'.$software.'/'.$instance.'/config';
+file_put_contents($config_file, $string);
+
+header('Location: '.$_SERVER['HTTP_REFERER']);

css/base.php

@@ -46,6 +46,10 @@ body {
 	border-radius: .5em;
 	box-shadow: 0px 0px .5em #0000004f;
 }
+.btn {
+	padding: .5em 1em;
+	cursor: pointer;
+}
 
 textarea {
 	max-width: -moz-available;

views/instance_config.php

@@ -1,7 +1,9 @@
 <div class="flex hmax">
-	<form class="center card">
+	<form class="center card" method="POST">
 		<h3 id="title"></h3>
 		<div id="config"></div>
+		<br><input type="submit" class="btn w100"
+			value="Save configuration"/>
 	</form>
 	<div id="config-item">
 		<label for="{field}">{placeholder}:</label>
@@ -13,6 +15,8 @@
 <script>
 var autofill_fields = {
 	mastodon: function(hargs, config) {
+		E.element('#window-instance_config form').setAttribute('action',
+			`api/v1/config/put/?software=mastodon&instance=${hargs['instance']}`);
 		const fields = window.consts['instance_config']['mastodon']['musthave'];
 		for (var i = 0; i < fields.length; i++) {
 			if (config[fields[i]] !== undefined)