Search.js

const request = require('request');

class ScSearcher {
    constructor() {
        this.client_id = null;
    }

    init(client_id) {
        this.client_id = client_id;
    }

    getTracks(search, limit, callback) {
        return new Promise((res, rej) => {
            if(typeof search != 'string') throw 'Seach term is not type of string';
            if(isNaN(limit)) throw 'Not a number';
            if(limit > 100 || limit < 1) throw 'Limit must be between 1 and 100';
            if(!this.client_id) throw 'Must set client id with init() first';

            var searchURL = 'https://api-v2.soundcloud.com/search/tracks?q=SEARCH_TERM&client_id=CLIENT_ID_TERM&limit=LIMIT_TERM';;

            var spaces = search.split(' ');
            for(var i=0; i < spaces.length; i++) {
                search = search.replace(' ', '%20');
            }

            searchURL = searchURL.replace('CLIENT_ID_TERM', this.client_id).replace('SEARCH_TERM', search).replace('LIMIT_TERM', limit);

            const promise = new Promise((_res, _rej) =>
                request({url: searchURL}, function (error, response, body) {
                    if(error) return _rej(new Error(error));

                    if (!error && response.statusCode === 200){
                        return _res({
                            body: JSON.parse(body)
                        });
                    }
                })
            );

            promise.then(response => {
                const body = response.body;
                const track_list = body.collection;

                return res(track_list);
            });
        });
    }
}

module.exports = ScSearcher;