refactor and comment

server/src/main/kotlin/suwayomi/tachidesk/global/controller/SettingsController.kt

@@ -0,0 +1,28 @@
+package suwayomi.tachidesk.global.controller
+
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+import io.javalin.http.Context
+import suwayomi.tachidesk.global.impl.About
+import suwayomi.tachidesk.global.impl.AppUpdate
+import suwayomi.tachidesk.server.JavalinSetup
+
+/** Settings Page/Screen */
+object SettingsController {
+    /** returns some static info about the current app build */
+    fun about(ctx: Context): Context {
+        return ctx.json(About.getAbout())
+    }
+
+    /** check for app updates */
+    fun checkUpdate(ctx: Context): Context {
+        return ctx.json(
+            JavalinSetup.future { AppUpdate.checkUpdate() }
+        )
+    }
+}