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package deck |
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import ( |
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"context" |
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"github.com/fxamacker/cbor/v2" |
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"github.com/memnix/memnix-rest/domain" |
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) |
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// UseCase is the deck use case. |
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type UseCase struct { |
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IRepository |
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IRedisRepository |
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} |
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// NewUseCase returns a new deck use case. |
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func NewUseCase(repo IRepository, redis IRedisRepository) IUseCase { |
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return &UseCase{IRepository: repo, IRedisRepository: redis} |
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} |
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// GetByID returns the deck with the given id. |
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func (u *UseCase) GetByID(ctx context.Context, id uint) (domain.Deck, error) { |
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var deckObject domain.Deck |
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if cacheHit, _ := u.IRedisRepository.GetByID(ctx, id); cacheHit != "" { |
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if err := cbor.Unmarshal([]byte(cacheHit), &deckObject); err == nil { |
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return deckObject, nil |
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} |
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} |
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deckObject, err := u.IRepository.GetByID(ctx, id) |
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if err != nil { |
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return domain.Deck{}, err |
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} |
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var marshalledDeck []byte |
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if marshalledDeck, err = cbor.Marshal(deckObject); err == nil { |
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_ = u.IRedisRepository.SetByID(ctx, id, string(marshalledDeck)) |
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} |
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return deckObject, nil |
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} |
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// Create creates a new deck. |
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func (u *UseCase) Create(ctx context.Context, deck *domain.Deck) error { |
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if marshalledDeck, err := cbor.Marshal(deck); err == nil { |
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_ = u.IRedisRepository.SetByID(ctx, deck.ID, string(marshalledDeck)) |
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} |
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return u.IRepository.Create(ctx, deck) |
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} |
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// CreateFromUser creates a new deck from the given user. |
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func (u *UseCase) CreateFromUser(ctx context.Context, user domain.User, deck *domain.Deck) error { |
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if marshalledDeck, err := cbor.Marshal(deck); err == nil { |
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_ = u.IRedisRepository.SetByID(ctx, deck.ID, string(marshalledDeck)) |
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} |
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return u.IRepository.CreateFromUser(ctx, user, deck) |
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} |
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// GetByUser returns the decks of the given user. |
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func (u *UseCase) GetByUser(ctx context.Context, user domain.User) ([]domain.Deck, error) { |
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var ownedDecks []domain.Deck |
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if cacheHit, _ := u.IRedisRepository.GetOwnedByUser(ctx, user.ID); cacheHit != "" { |
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if err := cbor.Unmarshal([]byte(cacheHit), &ownedDecks); err == nil { |
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return ownedDecks, nil |
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} |
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} |
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ownedDecks, err := u.IRepository.GetByUser(ctx, user) |
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if err != nil { |
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return []domain.Deck{}, err |
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} |
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var marshalledDeck []byte |
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if marshalledDeck, err = cbor.Marshal(ownedDecks); err == nil { |
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_ = u.IRedisRepository.SetOwnedByUser(ctx, user.ID, string(marshalledDeck)) |
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} |
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return ownedDecks, nil |
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} |
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// GetByLearner returns the decks of the given learner. |
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func (u *UseCase) GetByLearner(ctx context.Context, user domain.User) ([]domain.Deck, error) { |
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var learningDecks []domain.Deck |
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if cacheHit, _ := u.IRedisRepository.GetLearningByUser(ctx, user.ID); cacheHit != "" { |
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if err := cbor.Unmarshal([]byte(cacheHit), &learningDecks); err == nil { |
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return learningDecks, nil |
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} |
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} |
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learnedDecks, err := u.IRepository.GetByLearner(ctx, user) |
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if err != nil { |
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return []domain.Deck{}, err |
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} |
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var marshalledDeck []byte |
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if marshalledDeck, err = cbor.Marshal(learnedDecks); err == nil { |
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_ = u.IRedisRepository.SetLearningByUser(ctx, user.ID, string(marshalledDeck)) |
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} |
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return learnedDecks, nil |
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} |
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// GetPublic returns the public decks. |
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func (u *UseCase) GetPublic(ctx context.Context) ([]domain.Deck, error) { |
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return u.IRepository.GetPublic(ctx) |
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} |
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memnix /
memnix-rest
