Add users management to site settings (#126)

app/javascript/reducers/SiteSettings/usersReducer.ts

@@ -0,0 +1,58 @@
+import {
+  UsersRequestActionTypes,
+  USERS_REQUEST_START,
+  USERS_REQUEST_SUCCESS,
+  USERS_REQUEST_FAILURE,
+} from '../../actions/User/requestUsers';
+
+import {
+  UserUpdateActionTypes,
+  USER_UPDATE_START,
+  USER_UPDATE_SUCCESS,
+  USER_UPDATE_FAILURE,
+} from '../../actions/User/updateUser';
+
+export interface SiteSettingsUsersState {
+  areUpdating: boolean;
+  error: string;
+}
+
+const initialState: SiteSettingsUsersState = {
+  areUpdating: false,
+  error: '',
+};
+
+const siteSettingsUsersReducer = (
+  state = initialState,
+  action: UsersRequestActionTypes | UserUpdateActionTypes,
+) => {
+  switch (action.type) {
+    case USERS_REQUEST_START:
+    case USER_UPDATE_START:
+      return {
+        ...state,
+        areUpdating: true,
+      };
+
+    case USERS_REQUEST_SUCCESS:
+    case USER_UPDATE_SUCCESS:
+      return {
+        ...state,
+        areUpdating: false,
+        error: '',
+      };
+
+    case USERS_REQUEST_FAILURE:
+    case USER_UPDATE_FAILURE:
+      return {
+        ...state,
+        areUpdating: false,
+        error: action.error,
+      };
+    
+    default:
+      return state;
+  }
+}
+
+export default siteSettingsUsersReducer;