corporate-frontend-mithril/src/components/uos-explorer/data-service.js

Corporate frontend MithrilJS modules

const ArtsConstant= require('./../constant/arts-constant');
const stream= require('mithril/stream');
const qs= require('query-string');
const FPO= require('fpo');
const _= require('lodash');

let resultStream = stream();

let queryStringFn = function({props}) {
    return function(obj) {
        return qs.stringify(FPO.pick({v:obj, props}));
    };
};

let getUnitListQuery = queryStringFn({props: [ArtsConstant.kEY_DEPARTMENT, ArtsConstant.KEY_LEVEL]});

let fetchUnitList = function({obj}) {
    resultStream(ArtsConstant.LOADING_RESULT);
    m.redraw();
    fetch(`${ArtsConstant.ARTS_UOS_API}?allUOS&${getUnitListQuery(obj)}`)
        .then( response => response.json())
        .then((result)=> {
            let semester = obj[ArtsConstant.KEY_SEMESTER];
            let data = result && result.data ? FPO.filterIn({
                fn: ({v})=> semester ? Object.is(v.Period, semester) : true,
                arr: result.data,
            }) : ArtsConstant.NO_RESULT;
            if(_.isEmpty(data)) data = ArtsConstant.NO_RESULT;
            resultStream(data);
            m.redraw();
        });
};

module.exports = {
    resultStream,
    fetchUnitList,
};