ChainedPromises.coffee

# Using a Promise for a chain of async calls
loadInitialData: ->
  @companyService.loadInitialData().then(
    success: ( records ) ->
      # Do something with results
    failure: ( error ) ->
      # Do something with the error
  ).always( ->
    # Do something whether the call succeeded or failed
  )

# Service method aggregating Promises for separate calls and returning a single Promise
loadInitialData: ->
  return Deft.Promise.all( [
    @loadCompanies()
    @loadFeaturedProducts()
  ] )

loadCompanies: ->
  deferred = Ext.create( 'Deft.Deferred' )

  @companyStore.load(
    callback: ( records, operation, success ) ->
      if( success )
        deferred.resolve( records )
      else
        deferred.reject( "Error loading Companies." )
  )

  return deferred.promise

loadFeaturedProducts: ->
  deferred = Ext.create( 'Deft.Deferred' )

  @featuredProductStore.load(
    callback: ( records, operation, success ) ->
      if( success )
        deferred.resolve( records )
      else
        deferred.reject( "Error loading Products." )
  )

  return deferred.promise