/**

State machine.

Distributed state machine.

*/

var machine = Machine('signup', opts); // opts -> redis connection mostly, name of the machine.

machine.state('send mail', function(data, next){

// In this state we send an email with a confirmation link and exit the state

next('wait confirmation', data);

});

machine.state('wait confirmation'); // // In this state we do nothing we just wait for an external input

machine.state('confirm user', function(task){

return data;

})

machine.next('wait confirmation', data);

/**

queue('wait confirmation').add(data);

*/

machine.state('transcode video', function(data){

// transcode...

this.next('append moov');

}).catch(function(err){

this.next('delete tmp');

});

machine.state('append moov', input, function(data, next){

// Append MOOV etc.

this.next('delete tmp');

});

machine.next('delete temp', input, function(data, next){

// delete temp file

this.next('update user account');

});

machine.state('update user account', function(data, next){

// update database

});