add category and global meta (#438)

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

@@ -0,0 +1,53 @@
+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.HttpCode
+import suwayomi.tachidesk.global.impl.GlobalMeta
+import suwayomi.tachidesk.server.util.formParam
+import suwayomi.tachidesk.server.util.handler
+import suwayomi.tachidesk.server.util.withOperation
+
+object GlobalMetaController {
+    /** used to modify a category's meta parameters */
+    val getMeta = handler(
+        documentWith = {
+            withOperation {
+                summary("Server level meta mapping")
+                description("Get a list of globally stored key-value mapping, you can set values for whatever you want inside it.")
+            }
+        },
+        behaviorOf = { ctx ->
+            ctx.json(GlobalMeta.getMetaMap())
+            ctx.status(200)
+        },
+        withResults = {
+            httpCode(HttpCode.OK)
+        }
+    )
+
+    /** used to modify global meta parameters */
+    val modifyMeta = handler(
+        formParam<String>("key"),
+        formParam<String>("value"),
+        documentWith = {
+            withOperation {
+                summary("Add meta data to the global meta mapping")
+                description("A simple Key-Value stored at server global level, you can set values for whatever you want inside it.")
+            }
+        },
+        behaviorOf = { ctx, key, value ->
+            GlobalMeta.modifyMeta(key, value)
+            ctx.status(200)
+        },
+        withResults = {
+            httpCode(HttpCode.OK)
+            httpCode(HttpCode.NOT_FOUND)
+        }
+    )
+}