LyricsPicker/lyricsnode/routes/round.js

/*
 * main page
 */

var sqlite3 = require('sqlite3');
var path = require('path');
var db;		// make it global

/**
 * db name
 */
function dbName()
{
	return path.join(__dirname, '../../db/lyrics.sq3');
}

/**
 * turn a phrase into a list of acronyms
 */
function acronymize(phrase)
{
	var letters = [];
	phrase.split(' ').forEach(function(elem, idx, array) {
		letters.push(elem[0].toUpperCase());
	})

	return letters.join('');
}

/**
 * Pick a song
 */
function getSong(res) {
	var name = dbName();
	console.log('Opening the database ' + name + '...');
	db = new sqlite3.Database(name, sqlite3.OPEN_READWRITE, function(error) {
		if (error) {
			throw error;
		}

		console.log('Pickling a song...');
		db.get('SELECT * FROM songs WHERE done_in IS NULL ORDER BY random() LIMIT 1', function(err, song) {
			if (err) {
				throw err;
			}

			db.get('SELECT * FROM artists WHERE id = ' + song.artist, function(err, artist) {
				if (err) {
					throw err;
				}

				db.get('SELECT * FROM lyrics WHERE song = ' + song.id, function(err, lyrics) {
					if (err) {
						throw err;
					}

					params = {title: 'Round',
						      lyrics: lyrics.lyrics,
							  song_title: song.title,
					          song_artist: artist.name,
					          acronym_title: acronymize(song.title),
					          acronym_artist: acronymize(artist.name)
					};
					res.render('index', params);
				});
			});
		});
	});
}

exports.index = function(req, res) {
	// res.render('index', { title: 'Round'} );
	getSong(res);
}