service

type Post struct {
	ID           string
	Timestamp    int
	Name         string
	Avatar       string
	Body         string
	ParentID     string
	RepostID     string
	RoomID       string
	UpvoterIDs   map[string]bool
	DownvoterIDs map[string]bool
	ReplyCount   int
}

type Repository interface {
	Save(post Post) error
	FindByID(id string) (*Post, error)
	FindByParentID(id string, first int, after string, sort bool) (*[]Post, error)
	FindByRoomID(id string, first int, after string, sort bool) (*[]Post, error)
}

type Service interface {
	Get(id string) (*Post, error)
	Feed(first int, after string) (*[]Post, error)
	Child(parentID string, first int, after string) (*[]Post, error)
	Rooms(roomID string, first int, after string) (*[]Post, error)
	Create(name string, avatar string, body string, parentID string, repostID string, roomID string) (*Post, error)
	Upvote(accountID string, postID string) (*Post, error)
	Downvote(accountID string, postID string) (*Post, error)
}