core

type BookCopyAddedToCirculation struct {
	BookID          BookIDString
	ISBN            ISBNString
	Title           string
	Authors         string
	Edition         string
	Publisher       string
	PublicationYear uint
	OccurredAt      OccurredAt
}

type BookCopyLentToReader struct {
	BookID     BookIDString
	ReaderID   ReaderIDString
	OccurredAt OccurredAt
}

type BookCopyRemovedFromCirculation struct {
	BookID     BookIDString
	OccurredAt OccurredAt
}

type BookCopyReturnedByReader struct {
	BookID     BookIDString
	ReaderID   ReaderIDString
	OccurredAt OccurredAt
}

type BookIDString = string

type DomainEvent interface {
	EventType() string
	HasOccurredAt() time.Time
}

type DomainEvents = []DomainEvent

type ISBNString = string

type OccurredAt = time.Time

type ReaderIDString = string

type SomethingHasHappened struct {
	ID               string
	SomeInformation  string
	OccurredAt       OccurredAt
	DynamicEventType string
}