tomato-timer/reducer.js at master · kindunq/tomato-timer · GitHub

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//Import

//Actions


const START_TIMER = 'START_TIMER';
const RESTART_TIMER = 'RESTART_TIMER';
const ADD_SECOND = 'ADD_SECOND';

//Action Creators

function startTimer(){
    return {
        type: START_TIMER
    }
}

function restartTimer(){
    return {
        type: RESTART_TIMER
    }
}

function addSecond(){
    return {
        type:ADD_SECOND
    }
}

// Reducer

const TIMER_DURATION = 1500;

const initialState = {
    isPlaying: false,
    elapsedTime: 0,
    timerDuration: TIMER_DURATION
}

function reducer(state = initialState, action){
    switch(action.type){
        case START_TIMER:
            return applyStartTimer(state);
        case RESTART_TIMER:
            return applyRestartTimer(state);
        case ADD_SECOND:
            return applyAddSecond(state);
        default:
            return state;
    }
}

// Reducer Functions

function applyStartTimer(state){
    return {
        ...state,
        isPlaying:true
    }
}

function applyRestartTimer(state){
    return {
        ...state,
        isPlaying:false,
        elapsedTime :0
    }
}

function applyAddSecond(state){
    if(state.elapsedTime < TIMER_DURATION){
        return{
            ...state,
            elapsedTime:state.elapsedTime + 1
        }
    } else {
        return{
            ...state,
            isPlaying:false
        }
    }
}
// Export Action Creators

const actionCreators = {
    startTimer,
    restartTimer,
    addSecond
}

export {actionCreators};
// Export Reducer

export default reducer;