clank.io/lib/api.js

Twitch Chat Bot

var request = require("request");
var _ = require("./utils");

var api = function api(options, callback) {
    // Set the url to options.uri or options.url..
    var url = _.get(options.url, null) === null ? _.get(options.uri, null) : _.get(options.url, null);

    // Make sure it is a valid url..
    if (!_.isURL(url)) { url = "https://api.twitch.tv/kraken" + (url[0] === "/" ? url : `/${url}`); }

    // We are inside a Node application, so we can use the request module..
    if (_.isNode()) {
        request(_.merge({ method: "GET", json: true }, options, { url: url }), callback);
    }
    // Inside an extension -> we cannot use jsonp!
    else if (_.isExtension()) {
        options = _.merge({ url: url, method: "GET", headers: {} }, options);
        // prepare request
        var xhr = new XMLHttpRequest();
        xhr.open(options.method, options.url, true);
        for(var name in options.headers) {
            xhr.setRequestHeader(name, options.headers[name]);
        }
        xhr.responseType = "json";
        // set request handler
        xhr.addEventListener("load", (ev) => {
            if(xhr.readyState == 4) {
                if(xhr.status != 200) {
                    callback(xhr.status, null, null);
                } else {
                    callback(null, null, xhr.response);
                }
            }
        });
        // submit
        xhr.send();
    }
    // Inside a web application, use jsonp..
    else {
        // Callbacks must match the regex [a-zA-Z_$][\w$]*(\.[a-zA-Z_$][\w$]*)*
        var callbackName = `jsonp_callback_${Math.round(100000 * Math.random())}`;
        window[callbackName] = function(data) {
            delete window[callbackName];
            document.body.removeChild(script);
            callback(null, null, data);
        };

        // Inject the script in the document..
        var script = document.createElement("script");
        script.src = `${url}${url.includes("?") ? "&" : "?"}callback=${callbackName}`;
        document.body.appendChild(script);
    }
}

module.exports = api;