Portfolio


//Todo: dispatch, , subscribe, unsubscribe
//TODO: 객체 멤버 함수들 이름을 키로, 값을 각 state 초기값으로
const state = {}
const reducers = rootReducer
Object.keys(reducers).forEach(reducerName => state[reducerName] = reducers[reducerName](action="")))

const store = new Store.createStore({
	selectedImageUrl,
	currentPaths,
	isLoading
})

getState = () => state

state는
{
	selectedImageUrl: null,
	currentPaths: []
	isLoading: false
}

--

const selectedImageUrl = (state=null, action) => {
        switch(action.type) {
            case "CLICK_IMAGE":
                return action.imageUrl
						case "REMOVE_IMAGE":
								return null
            default:
                return state
        }
    }

this.setState({
                    ...this.state,
                    selectedImageUrl: `${COMMON_IMAGE_URL}${node.filePath}`
                })
store.dispatch({
	type: "CLICK_IMAGE",
	imageUrl: `${COMMON_IMAGE_URL}${node.filePath}`
})

store.dispatch({
	type: "REMOVE_IMAGE"
})
--

const currentPaths = (state=[], action) => {
        switch(action.type) {
						case "GO_TO_SUB":
								return [...state, action.subNode]
            case "GO_BACK":
                return state.slice(0, state.length-1)
						case "GO_BACK_TO_PARENTS":
								return state.slice(0, action.parentIdx+1)
            default:
                return state
        }
    }


this.setState({
                ...this.state,
                paths: newPaths.slice(0, clickedIdx+1)
            })

this.setState({
                    ...this.state,
                    paths: [...this.state.paths, node]
                })

this.setState({
                ...this.state,
                paths: newPaths
            })

store.dispatch({
	type: "GO_BACK_TO_PARENTS",
	parentIdx: clickedIdx
})
store.dispatch({
	type: "GO_TO_SUB",
	subNode: node
})
store.dispatch({
	type: "GO_BACK"
})
--
const isLoading = (state=false, action) => {
			switch(action.type){
				case "LOADING"
					return true
				case "UNLOADING"
					return false
	}
}


this.setState({
            ...this.state,
            isLoading: true
        })

store.dispatch({
	type: "LOADING"
})

store.dispatch({
	type: "UNLOADING"
})


//리듀서 : state 복사본을 각 액션에 따라 조작해서 새로운 state 반환
//cf) setState: 현재 state를 변경, getState: 현재 state를 반환
const reducer = (state=[], action) => {
	switch(action.type) {
		case "ADD_TODO": //상태를 어떻게 조작할까를 정의
			return [...state, action.text] //새 상태를 반환 => store의 상태가 이걸로 바뀜
		default:
			return state
	}
}

const store = createStore(reducer, initialState)
//이제 스토어는 set/getState를 가짐

store.dispatch({
	type: "ADD_TODO",
	text: "과제 하기"
}) // 상태를 setState하는 것

/*
const increment = () => { //일반적으로 액션 생성자 사용
  return {
    type: 'counter/increment'
  }
}

store.dispatch(increment()) 
*/

store.getState()
// 현재 상태

const handleChange() {
}

store.subscribe(handleChange)
//액션이 dispatch될 때마다 해당 리스너가 실행됨

고양이 사진첩 디벨롭 과제