webradio-metadata/parsers/France/France Info.js

API scraping recipes to get metadata of radio streams

// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

// Copyright (c) 2018 Alexandre Storelli

"use strict";
const axios = require("axios");

module.exports = async function(exturl) {
	try {
		const req = await axios.get(exturl);
		const result = req.data;

		var b0 = "program__grid__line expanded";
		var i0 = result.indexOf(b0);
		var r1 = result.slice(i0+b0.length);
		var b1 = "program__grid__line ";
		var i1 = r1.indexOf(b1);
		var r2 = r1.slice(0, i1);
		//log.debug(r2);

		var b2 = "<span class=\"program__grid__line__right__title\">";
		var b3 = "</span>";
		var i2 = r1.indexOf(b2);
		var i3 = r1.indexOf(b3);
		var meta1 = r2.slice(i2+b2.length, i3).trim(); // title of the large program window

		if (meta1.length == 0) {
			return { error: "empty line title" };
		}

		var bs = "class=\"program__grid__subline ";
		var r2s = r1.split(bs);
		var currentBlock = -1;
		for (var i=1; i<r2s.length; i++) {
			if (r2s[i].indexOf("is-available") < 0) break;
			currentBlock = i;
		}

		if (currentBlock < 0) {
			log.warn("France_France Info: warning, could not get subline title");
			return { title: meta1 };
		}

		//log.debug(r2s[currentBlock]);
		var b4 = "class=\"program__grid__line__right__title\">";
		var b5 = "</a>";
		var i4 = r2s[currentBlock].indexOf(b4);
		var r3 = r2s[currentBlock].slice(i4+b4.length);
		var i5 = r3.indexOf(b5);
		var meta2 = r3.slice(0, i5).trim(); // title of the precise current program

		return { artist: meta1, title: meta2 };

	} catch (err) {
		return { error: err };
	}
}