const INITIAL_STATE = {
                            fetching : false,
                            fetched : false,
                            ipfsHash : [],
                            error : null
                        }
export default (state=INITIAL_STATE,action) =>{
        switch(action.type){
            case 'FILE_UPLOAD_START':
                return {
                    ...state,
                    fetching:true
                }
            case 'FILE_UPLOAD_SUCCESS':
                return {
                    ...state,
                    fetching : false,
                    fetched : true,
                    ipfsHash : action.payload // IPFS is replaced rather than pushing into the array
                }
            case 'FILE_UPLOAD_ERROR':
                return {
                    ...state,
                    fetching : false,
                    fetched : false,
                    error : action.payload
                }
            default:
                return {...state}
        }
    }