service

type CardService interface {
	ListAllCards(inDeck value.Deck) ([]value.Card, error)

	FindCards(front, back string) ([]value.Card, error)
	FindCardsInDeck(front, back string, inDeck value.Deck) ([]value.Card, error)
	FindCardsByFront(front string) ([]value.Card, error)
	FindCardsByFrontInDeck(front string, deck value.Deck) ([]value.Card, error)

	FilterCards(filterFunc func(value.Card) bool) ([]value.Card, error)
	FilterCardsInDeck(filterFunc func(value.Card) bool, deck value.Deck) ([]value.Card, error)

	SaveCard(card value.Card) (*value.Card, error)
	PutCardInDeck(card value.Card, deck value.Deck) (*value.Card, error)

	DeleteCard(card value.Card) error
	DeleteAllCardsInDeck(deck value.Deck) error
}

type DeckService interface {
	ListAllDecks() ([]value.Deck, error)
	FindDeckByName(name string) (*value.Deck, error)
	FilterDecks(filterFunc func(value.Deck) bool) ([]value.Deck, error)
	SaveDeck(deck value.Deck) (*value.Deck, error)
	DeleteDeckByName(name string) error
	DeleteDeck(deck value.Deck) error
}

type FlashcardService interface {
	CardService
	DeckService
}