singer.js

var bot = require('./bot');

var compileSong = function (lines) {
	var trigs = {};
	var addTrig = function (time, line) {
		if (!line.func && line.text) {
			line.func = function () {
				return line.text;
			};
		}
		trigs[time] = line.func;
	};
	for (var i = 0, l = lines.length; i < l; i++) {
		var line = lines[i];

		if (line.duration && line.frequency) {
			addTrig(line.time, line);

			var t = line.time + line.frequency;
			var end = line.time + line.duration;
			while (t <= end) {
				addTrig(t, line);
				t += line.frequency;
			}
		} else {
			addTrig(line.time, line);
		}
	}
	return trigs;
};

var sing = function sing (song) {
	var i = 0;
	setInterval(function () {
		i++;
		if (song[i]) {
			bot.speak(song[i]());
		}
	}, 1000);
};

module.exports.compileSong = compileSong;
module.exports.sing = sing;