Dispatch decorators for Flux

dispatch_decorators.js

/**
* Dispatch decorators for Flux (using ES2016 via Babel stage 1)
*
* There are some nice things about this:
*
* 1. Action types are specified at design time.
* 2. Any method's return value can be dispatched by prepending the decorator, without breaking up method definition itself.
* 3. Easier testing of action creator methods by forcing return value + simpler mocking of dispatch.
* 4. Easier grokking of all actions attached to a given class.
*/
let dispatch = ( ACTION ) => {
  return function( target, key, descriptor ) {
    let method = descriptor.value;
    descriptor.value = function( ...args  ) {
      let result = method.call( target, ...args );
      myDispatchFn( ACTION, result );
      return result;
    };
    return descriptor;
  };
};

class MyClass {
  
  @dispatch( 'SOME-ACTION-TYPE' )
  someActionCreator( someArg ) {
    // possibly some other logic in here
    return { someKey: 'someValue' };
  }
}