import * as types from '../constants/ActionTypes';

let sequenceList = {};

const minPendingTime = 500;

/*

* I just use this to fix a bugs about when the request is too quickly, the RefreshControl can't update the refreshing.

* It's a bug, but I don't know how to fix it, so use this hack way to do it.

* */

export default function ({dispatch}) {

return next => action => {

const {meta={}, payload} = action;

const {sequence={}, tab} = meta;

if (action.type === types.UPDATE_TOPICS_BY_TAB) {

if (sequence.type == 'start') {

sequenceList[sequence.id] = {

start: new Date().getTime()

};

return next(action);

}

if (sequence.type == 'next' && sequenceList[sequence.id]) {

let start = sequenceList[sequence.id].start;

let end = new Date().getTime();

let leftTime = minPendingTime - (end - start);

delete sequenceList[sequence.id];

if (leftTime < 0) {

return next(action);

}

else {

return setTimeout(()=> {

next(action);

}, leftTime);

}

}

}

return next(action);

};

}