node-steamcommunity/classes/CMarketSearchResult.js

const Cheerio = require('cheerio');

const SteamCommunity = require('../index.js');

SteamCommunity.prototype.marketSearch = function(options, callback) {
	let qs = {};

	if (typeof options === 'string') {
		qs.query = options;
	} else {
		qs.query = options.query || '';
		qs.appid = options.appid;
		qs.search_descriptions = options.searchDescriptions ? 1 : 0;

		if (qs.appid) {
			for (let i in options) {
				if (['query', 'appid', 'searchDescriptions'].indexOf(i) != -1) {
					continue;
				}

				// This is a tag
				qs['category_' + qs.appid + '_' + i + '[]'] = 'tag_' + options[i];
			}
		}
	}

	qs.start = 0;
	qs.count = 100;
	qs.sort_column = 'price';
	qs.sort_dir = 'asc';

	let results = [];
	const performSearch = () => {
		this.httpRequest({
			uri: 'https://steamcommunity.com/market/search/render/',
			qs: qs,
			headers: {
				referer: 'https://steamcommunity.com/market/search'
			},
			json: true
		}, (err, response, body) => {
			if (err) {
				callback(err);
				return;
			}

			if (!body.success) {
				callback(new Error('Success is not true'));
				return;
			}

			if (!body.results_html) {
				callback(new Error('No results_html in response'));
				return;
			}

			let $ = Cheerio.load(body.results_html);
			let $errorMsg = $('.market_listing_table_message');
			if ($errorMsg.length > 0) {
				callback(new Error($errorMsg.text()));
				return;
			}

			let rows = $('.market_listing_row_link');
			for (let i = 0; i < rows.length; i++) {
				results.push(new CMarketSearchResult($(rows[i])));
			}

			if (body.start + body.pagesize >= body.total_count) {
				callback(null, results);
			} else {
				qs.start += body.pagesize;
				performSearch();
			}
		}, 'steamcommunity');
	};

	performSearch();
};

function CMarketSearchResult(row) {
	let match = row.attr('href').match(/\/market\/listings\/(\d+)\/([^?/]+)/);

	this.appid = parseInt(match[1], 10);
	this.market_hash_name = decodeURIComponent(match[2]);
	this.image = ((row.find('.market_listing_item_img').attr('src') || '').match(/^https?:\/\/[^/]+\/economy\/image\/[^/]+\//) || [])[0];
	this.price = parseInt(row.find('.market_listing_their_price .market_table_value span.normal_price').text().replace(/[^\d]+/g, ''), 10);
	this.quantity = parseInt(row.find('.market_listing_num_listings_qty').text().replace(/[^\d]+/g, ''), 10);
}