AntonStoeckl

game
├── application
│   ├── deckselection
│   │   ├── commands.go                             # all commands
│   │   ├── commands_test.go                        # unit tests
│   │   ├── integration_test.go                     # driver adapter
│   │   ├── select_deck_command_handler.go          # driver port definition and implementation
│   │   ├── select_deck_command_handler_test.go     # driver adapter
│   │   ├── select_deck.go                          # domain logic
│   │   ├── select_deck_http_handler.go             # driver adapter

AntonStoeckl

game
├── application
│   ├── forselectingdecks
│   │   ├── command_handler.go        # driver port definition and implementation
│   │   ├── command_handler_test.go   # driver adapter
│   │   ├── command.go                # command
│   │   ├── commandstest.go           # unit tests
│   │   ├── http_handler.go           # driver adapter
│   │   ├── integration_test.go       # driver adapter
│   │   ├── select_deck.go            # domain logic

AntonStoeckl

# the coarse-grained version

type ForStoringEvents interface {
  CreateEventStream(streamID lib.StreamID, event lib.Event) error
  AppendEventsToStream(
    streamID lib.StreamID,
    expectedRevision uint64,
    recordedEvents ...lib.Event,
  ) error
  ReadEventStream(streamID lib.StreamID) (lib.EventStream, error)

AntonStoeckl

# With function types instead of interfaces all ports are automatically fine-grained
type ForSelectingDecks func(command SelectDeckCommand) error
type ForUnselectingDecks func(command UnselectDeckCommand) error

AntonStoeckl

# the coarse-grained version

type ForSelectingDecks interface {
  Select(command SelectDeckCommand) error
  Unselect(command UnselectDeckCommand) error
}

# the fine-grained version

type ForSelectingDecks interface {

AntonStoeckl

package finishcard

import (
    "ace-life/hexagon/domain"
    "ace-life/hexagon/usecases"
)

type CommandHandler struct {
    drawReplacementCard  usecases.ForDrawingReplacementCards
    loadEventStream      usecases.ForLoadingEventStreams

AntonStoeckl

package finishcard

import (
    "ace-life/errtypes"
    "ace-life/hexagon/domain"
    "ace-life/hexagon/domain/player"
    "ace-life/hexagon/events"
    "ace-life/hexagon/usecases"
)

AntonStoeckl

package functionsandinterfaces_test

import (
   "testing"

   "github.com/matryer/is"

   . "go-bits/magic-with-functions/functionsandinterfaces"
)

AntonStoeckl

package functionsandinterfaces

type ForRegisteringCustomers interface {
	Register(name, emailAddress string) error
}

type ForRegisteringCustomersFunc func(name, emailAddress string) error

// Register is a receiver method for the ForRegisteringCustomersFunc
// type that fullfills the ForRegisteringCustomers interface

AntonStoeckl

type Handler interface {
   ServeHTTP(ResponseWriter, *Request)
}