ratings.js•1.23 kB
'use strict';
const cheerio = require('cheerio');
const common = require('./common');
function ratings (opts) {
return new Promise(function (resolve) {
if (!opts.id) {
throw Error('id is required');
}
const country = opts.country || 'us';
const storeFront = common.storeId(opts.country);
const idValue = opts.id;
const url = `https://itunes.apple.com/${country}/customer-reviews/id${idValue}?displayable-kind=11`;
resolve(common.request(url, {
'X-Apple-Store-Front': `${storeFront},12`
}, opts.requestOptions));
})
.then((html) => {
if (html.length === 0) {
throw Error('App not found (404)');
}
return parseRatings(html);
});
}
module.exports = ratings;
function parseRatings (html) {
const $ = cheerio.load(html);
const ratingsMatch = $('.rating-count').text().match(/\d+/);
const ratings = Array.isArray(ratingsMatch) ? parseInt(ratingsMatch[0]) : 0;
const ratingsByStar = $('.vote .total').map((i, el) => parseInt($(el).text())).get();
const histogram = ratingsByStar.reduce((acc, ratingsForStar, index) => {
return Object.assign(acc, { [5 - index]: ratingsForStar });
}, {});
return { ratings, histogram };
}