fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/redux/realtime/methods.ts

@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { store } from '..'
+import type { AddOnlineUserAction, OnlineUser, RemoveOnlineUserAction } from './types'
+import { RealtimeActionType } from './types'
+
+/**
+ * Dispatches an event to add a user
+ *
+ * @param clientId The clientId of the user to add
+ * @param user The user to add.
+ */
+export const addOnlineUser = (clientId: number, user: OnlineUser): void => {
+  const action: AddOnlineUserAction = {
+    type: RealtimeActionType.ADD_ONLINE_USER,
+    clientId,
+    user
+  }
+  store.dispatch(action)
+}
+
+/**
+ * Dispatches an event to remove a user from the online users list.
+ *
+ * @param clientId The yjs client id of the user to remove from the online users list.
+ */
+export const removeOnlineUser = (clientId: number): void => {
+  const action: RemoveOnlineUserAction = {
+    type: RealtimeActionType.REMOVE_ONLINE_USER,
+    clientId
+  }
+  store.dispatch(action)
+}