Function driver

Drives a state machine.

Uses a 'handlers' structure to determine when to change state and actions to take.

The structure is a set of logical conditions: if we're in this state, then move to this other state etc.

const handlers = [
 {
   // If we're in the 'sleeping' state, move to next state
   if: 'sleeping',
   then: { next: true }
 },
 {
   // If we're in the 'waking' state, randomly either go to 'resting' or 'sleeping' state
   if: 'waking',
   then: [
     () => {
       if (Math.random() > 0.5) {
         return { next: 'resting' }
       } else {
         return { next: 'sleeping' }
       }
     }
   ]
  }
];
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Set up the driver, and call run() when you want to get the machine to change state or take action:

const driver = await StateMachine.driver(states, handlers);
setInterval(async () => {
 await driver.run(); // Note use of 'await' again
}, 1000);
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Essentially, the 'handlers' structure gets run through each time run() is called.

Defaults to selecting the highest-ranked result to determine what to do next.