Creates header redux module

Author: velopert

src/modules/__tests__/header.test.ts

@@ -0,0 +1,20 @@
+import header, { setCustom } from '../header';
+
+describe('header redux module', () => {
+  describe('reducer', () => {
+    const initialState = {
+      custom: false,
+      userLogo: null,
+    };
+    it('should have initialState', () => {
+      const state = header(undefined, {});
+      expect(state).toEqual(initialState);
+    });
+    it('handles SET_CUSTOM action', () => {
+      let state = header(initialState, setCustom(true));
+      expect(state.custom).toBe(true);
+      state = header(initialState, setCustom(false));
+      expect(state.custom).toBe(false);
+    });
+  });
+});

src/modules/header.ts

@@ -0,0 +1,34 @@
+import { createReducer, updateKey } from '../lib/utils';
+import { createStandardAction } from 'typesafe-actions';
+
+const SET_CUSTOM = 'header/SET_CUSTOM';
+
+export const setCustom = createStandardAction(SET_CUSTOM)<boolean>();
+
+type UserLogo = {
+  title: string;
+  logo_image: string;
+};
+
+interface HeaderState {
+  custom: boolean;
+  userLogo: null | UserLogo;
+}
+
+type SetCustom = ReturnType<typeof setCustom>;
+
+const initialState = {
+  custom: false,
+  userLogo: null,
+};
+
+const header = createReducer(
+  {
+    [SET_CUSTOM]: (state, action: SetCustom) => {
+      return updateKey(state, 'custom', action.payload);
+    },
+  },
+  initialState,
+);
+
+export default header;