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

import * as TABS from '../constants/Tabs';

const tabs = TABS.tabs;

let initialState = {};

tabs.forEach((item)=> {

initialState[item] = {

pullRefreshPending: false,

reachedEndPending: false,

page: 1,

limit: 10,

flag: 0

}

});

export default function (state = initialState, action) {

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

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

const pending = sequence.type === 'start';

switch (type) {

case types.GET_TOPICS_BY_TAB:

return {

...state,

[tab]: {

...state[tab],

reachedEndPending: pending,

page: (!error && !pending) ? state[tab].page + 1: state[tab].page

}

};

case types.UPDATE_TOPICS_BY_TAB:

return {

...state,

[tab]: {

...state[tab],

pullRefreshPending: pending,

page: initialState[tab].page,

flag: (!error && !pending) ? state[tab].flag + 1 : state[tab].flag

}

};

default:

return state;

}

}