jam-midi

AngularJS computer keyboard piano maintained MongoDB

jam is shortcut for Jazz AngularJS MongoDB

API reference is available at http://jazz-soft.net/doc/Jazz-Plugin/reference.html

Questions and comments are welcome at http://jazz-soft.org/

How to jam?

npm install jam-midi
node jam

and point your browser to localhost:3003 or use localhost:3003/jam.html to view all messages with zoom:

jam example

var jazz = require('jazz-midi')
, Jazz = new jazz.MIDI()
, MongoClient = require('mongodb').MongoClient
, express = require('express')
, http = require('http')
, path = require('path');
var out = Jazz.MidiOutOpen(0);
var list = Jazz.MidiOutList();
var app = express();
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.bodyParser());
app.use(express.favicon('public/images/favicon.ico'));
var db, song, Song;

MongoClient.connect('mongodb://localhost:27017/npm', function(err, database) {
  if(err) throw err;
  db = database;  
  http.createServer(app).listen(3003, function () {
    console.log("Express server listening on port 3003");
  });
});
 
/*Handling the AngularJS post request*/
app.post('/post', function (req, res) {
  var msg = req.body.msg;
  Jazz.MidiOutLong(msg);
  res.send(msg);
  var timestamp = req.body.timestamp;
  if (!timestamp) song = false; 
  var midi = { '_id' : timestamp, 'msg' : msg };
  if (song) insert(song, midi);
});
app.post('/list', function (req, res) {
  res.send(list);
});
app.post('/songs', function (req, res) {
  db.collections(function(err, collections){
  	 var colls = collections.map(function(obj){
      return obj.collectionName === "system.indexes" ? null : obj.collectionName;
    });
  	 res.send(colls);
  });
});
app.post('/rec', function (req, res) {
  if (req.body.song) song = req.body.song;
  var msg = req.body.msg;
  Jazz.MidiOutLong(msg);
  res.send(song);
  db.dropCollection(song, function(err, result){});
  console.dir("db." + song + " cleaned");
});
app.post('/play', function (req, res) {
  var id = req.body;
  if (Song) db.collection(Song).findOne(id, function(err, row) {
    if(err) throw err;
    if (row) {
      var msg = row.msg;
      Jazz.MidiOutLong(msg);
      res.send(msg);
    }
  });
});
app.post('/drop', function (req, res) {
  if (req.body.song)
  song = req.body.song;
  db.dropCollection(song, function(err, result){});
  Song = null;
  console.log('drop: ' + song);
  res.send('drop: ' + song);
});
app.post('/out', function (req, res) {
  var out = req.body.out;
  Jazz.MidiOutOpen(out);
  var msg = req.body.msg;
  Jazz.MidiOutLong(msg);     
  res.send(msg); 
  var timestamp = req.body.timestamp;
  if (!timestamp) song = false;
  var midi = { '_id' : timestamp, 'msg' : msg };
  insert(song, midi);  
});
app.post('/panic', function (req, res) {
  var msg = req.body.msg;
  Jazz.MidiOutLong(msg);
  res.send(msg);
}); 
app.post('/OK', function (req, res) {
  song = req.body.song;
  var cursor = db.collection(song).find().sort( { _id: 1 } );	
  cursor.toArray(function(err, docs){
    var timestamps = docs.map(function(obj){
      return obj._id;
    });
    res.send(timestamps);
    console.log("retrieved from: " + song);
    console.log(docs);
  });
});
app.post('/All', function (req, res) {
  Song = req.body.song;
  var cursor = db.collection(song).find().sort( { _id: 1 } );	
  cursor.toArray(function(err, docs){
    res.send(docs);
  });
});

/* Querying MongoDB*/
app.post('/remove', function (req, res) {
  song = req.body.song;
  if (typeof(req.body.timestamp) !== "undefined") {
  	 var timestamp = req.body.timestamp;
  	 db.collection(song).remove({_id: timestamp}, {safe: true}, function(err, result) {
      if (err) {
        console.log(err); throw err;
      }
    });
    res.send("removed: " + timestamp);
  }
});
app.post('/insert', function (req, res) {
  var msg = req.body.msg;
  var timestamp = req.body.timestamp;
  res.send(msg);
  var midi = { '_id' : timestamp, 'msg' : msg };
  db.collection(Song).insert(midi, function(err, inserted) {
    if(err) throw err;
    console.dir("Inserted into: " + song + " " + JSON.stringify(inserted));
  }); 
});	
app.post('/update', function (req, res) {
  var msg = req.body.msg;
  Jazz.MidiOutLong(msg);
  res.send(msg);
  var timestamp = req.body._id; 
  var query = { '_id' : timestamp };
  var operator = { '$set' : {'msg': msg} };
  db.collection(Song).findAndModify( query,
  [['_id','desc']],
  operator, // replacement
  function(err, object) {
    if (err){
      console.warn(err.message);
    } else {
    	console.dir("old value: ");
      console.dir(object);
    }
  });   
});
var insert = function (song, midi) {
  db.collection(song).insert(midi, function(err, inserted) {
    if(err) throw err;
    console.dir("Inserted into: " + song + " " + JSON.stringify(inserted));
  });
}

example

Open mongolab.com website
Click Sign up button
Fill in your user information then hit Create account
From the dashboard, click on Create new button
Select any cloud provider
Under Plan click on Single-node (development) tab and select Sandbox (it's free)
Leave MongoDB version as is
Enter Database name for your app
Then click on Create new MongoDB deployment button
Click to the recently created database
You should see the following message:
A database user is required to connect to this database. Click here to create a new one.
Click the link and fill in DB Username and DB Password fields
Finally, in jam.js instead of 'mongodb://localhost:27017/npm', use the following URI with your credentials:
'mongodb://USERNAME:PASSWORD@ds*****.mongolab.com:*****/DATABASE_NAME'

ja example (simple implementation without MongoDB)

node ja

and point your browser to localhost:3003/ja.html

var jazz = require('jazz-midi')
, Jazz = new jazz.MIDI()
, express = require('express')
, http = require('http'), path = require('path');

var out = Jazz.MidiOutOpen(0);
var list = Jazz.MidiOutList();
var app = express();
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.bodyParser());
app.use(express.favicon('public/images/favicon.ico'));

app.post('/post', function (req, res) {
  var msg = req.body.msg; 
  console.log(msg); 
  Jazz.MidiOutLong(msg);
  res.send(msg);
});  
  
app.post('/list', function (req, res) {
  res.send(list);
});

app.post('/out', function (req, res) {
  var out = req.body.out;
  Jazz.MidiOutOpen(out);
  var msg = req.body.msg; 
  console.log(msg); 
  Jazz.MidiOutLong(msg);
});

var server = http.createServer(app).listen(3003, function () { 
  console.log("Express server listening on port 3003");
});

Scales available: