dbmedialab/reader-critics

//
// LESERKRITIKK v2 (aka Reader Critics)
// Copyright (C) 2017 DB Medialab/Aller Media AS, Oslo, Norway
// https://github.com/dbmedialab/reader-critics/
//
// This program is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <http://www.gnu.org/licenses/>.
//

import User from 'base/User';
import * as Immutable from 'seamless-immutable';
import * as UsersActionsCreator from 'admin/actions/UsersActionsCreator';
import UserConstants from 'admin/constants/UserConstants';
import * as mergers from 'seamless-immutable-mergers';

const mergeConfig = {
    merger: mergers.updatingByIdArrayMerger,
    mergerObjectIdentifier: 'ID',
};

interface UsersInit {
    users: User[];
}

const initialState = Immutable.from <UsersInit> ({
    users: [],
});

function receiveUsers(action, state) {
    return state.merge({users: action.payload}, {deep: true});
}

function clear(action, state) {
    return initialState;
}

function deleteUser(action, state) {
    const users = state.getIn(['users']);
    const userId = action.payload;
    const newUsers = Immutable.flatMap(users, (value) => {
        if (value.ID === userId) {
            return [];
        } else {
            return value;
        }
    });
    return Immutable.set(state, 'users', newUsers);
}

function addUser(action, state) {
    const user = action.payload;
    let users = state.getIn(['users']);
    if (user) {
        const mutableArray = Immutable.asMutable(users, {deep: true});
        mutableArray.push(user);
        users = Immutable(mutableArray);
    }
    return Immutable({ ...state, users });
}

function saveUser(action, state) {
    const user = action.payload;
    return Immutable({...state, user});
}

function editUser(action, state) {
    return state.merge({users: [action.payload]}, mergeConfig);
}

function UsersReducer(state: User[] = initialState, action: UsersActionsCreator.TAction): User[] {
    switch (action.type) {
        case UserConstants.USERS_RECEIVED:
            return receiveUsers(action, state);
        case UserConstants.DELETE_USER:
            return deleteUser(action, state);
        case UserConstants.EDIT_USER:
            return editUser(action, state);
        case UserConstants.SAVE_USER:
            return saveUser(action, state);
        case UserConstants.ADD_USER:
            return addUser(action, state);
        case UserConstants.USER_LIST_CLEAR:
            return clear(action, state);
        default:
            return state;
    }
}

export default UsersReducer;