derpy

/**
 * and so Derpy becomes a real slack bot
 *
 * usage:
 *
 * // will test against any string
 * Derpy.hook('~someWord', function(someWord) { // do something with someWord });
 * Derpy.hook('watch game :id', function(id) { // do something with id });
 *
 * hook options:
 *  :x      tests against an int
 *  *x      tests against a string
 *  ~x      tests against any word
 *
 */
(function() {

    window.Derpy = (function() {

        // basic constructor
        function D() {
            D.routes = {};
            D.intParam = /:\w+/g;
            D.stringParam = /\*\w+/g;
            D.anyParam = /~\w+/g;
        }

        // add a hook to Derpy
        D.prototype.hook = function(route, callback)
        {
            // escape backslashes
            route = route.replace(/\//, "\\/");

            // convert custom int, string, and any params into nice regex
            route = route.replace(D.intParam, '(\\d+)')
                         .replace(D.stringParam, '(\\D+)')
                         .replace(D.anyParam, '(\\S+)');

            // add to collection
            // and add string boundaries around the regex so the hook
            // has to match the exact length
            return D.routes["^" + route + "$"] = callback;
        };

        // check message against all known hooks
        D.prototype.check = function(message) {

            // loop through all regexes
            for(regexText in D.routes) {
                var regex = new RegExp(regexText);
                if (regex.test(message)) {
                    var callback = D.routes[regexText];

                    // run the callback and bind the regex execution (minus the first
                    // item in the array since this is the whole match)
                    return callback.apply(window, regex.exec(message).slice(1));
                }
            }

            // return null so it's possible to check if check() returns no matches
            return null;
        };

        return new D;

    })();

}).call(this);