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/user/methods.ts

@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { store } from '..'
+import type { ClearUserAction, SetUserAction } from './types'
+import { UserActionType } from './types'
+import type { LoginUserInfo } from '../../api/me/types'
+
+/**
+ * Sets the given user state into the redux.
+ * @param state The user state to set into the redux.
+ */
+export const setUser = (state: LoginUserInfo): void => {
+  const action: SetUserAction = {
+    type: UserActionType.SET_USER,
+    state
+  }
+  store.dispatch(action)
+}
+
+/**
+ * Clears the user state from the redux.
+ */
+export const clearUser: () => void = () => {
+  const action: ClearUserAction = {
+    type: UserActionType.CLEAR_USER
+  }
+  store.dispatch(action)
+}

frontend/src/redux/user/reducers.ts

@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Reducer } from 'redux'
+import type { OptionalUserState, UserActions } from './types'
+import { UserActionType } from './types'
+
+export const UserReducer: Reducer<OptionalUserState, UserActions> = (
+  state: OptionalUserState = null,
+  action: UserActions
+) => {
+  switch (action.type) {
+    case UserActionType.SET_USER:
+      return action.state
+    case UserActionType.CLEAR_USER:
+      return null
+    default:
+      return state
+  }
+}

frontend/src/redux/user/types.ts

@@ -0,0 +1,26 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { Action } from 'redux'
+import type { LoginUserInfo } from '../../api/me/types'
+
+export enum UserActionType {
+  SET_USER = 'user/set',
+  CLEAR_USER = 'user/clear'
+}
+
+export type UserActions = SetUserAction | ClearUserAction
+
+export interface SetUserAction extends Action<UserActionType> {
+  type: UserActionType.SET_USER
+  state: LoginUserInfo
+}
+
+export interface ClearUserAction extends Action<UserActionType> {
+  type: UserActionType.CLEAR_USER
+}
+
+export type OptionalUserState = LoginUserInfo | null