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user_usecase.go
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/
user_usecase.go
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package usecase
import (
"context"
"errors"
"github.com/kujilabo/cocotola-synthesizer-api/src/app/domain"
"github.com/kujilabo/cocotola-synthesizer-api/src/app/service"
"gorm.io/gorm"
liberrors "github.com/kujilabo/cocotola-synthesizer-api/src/lib/errors"
)
type UserUsecase interface {
Synthesize(ctx context.Context, lang2 domain.Lang2, text string) (service.Audio, error)
FindAudioByAudioID(ctx context.Context, audioID domain.AudioID) (service.Audio, error)
}
type userUsecase struct {
db *gorm.DB
rfFunc service.RepositoryFactoryFunc
synthesizerClient service.SynthesizerClient
}
func NewUserUsecase(db *gorm.DB, rfFunc service.RepositoryFactoryFunc, synthesizerClient service.SynthesizerClient) UserUsecase {
return &userUsecase{
db: db,
rfFunc: rfFunc,
synthesizerClient: synthesizerClient,
}
}
func (u *userUsecase) Synthesize(ctx context.Context, lang2 domain.Lang2, text string) (service.Audio, error) {
// try to find the audio content from the DB
rf, err := u.rfFunc(ctx, u.db)
if err != nil {
return nil, err
}
repo := rf.NewAudioRepository(ctx)
audioContentFromDB, err := repo.FindByLangAndText(ctx, lang2.ToLang5(), text)
if err != nil {
if !errors.Is(err, service.ErrAudioNotFound) {
return nil, liberrors.Errorf("faield FindByLangAndText. err: %w", err)
}
} else {
return audioContentFromDB, nil
}
// synthesize text via the Web API
audioContent, err := u.synthesizerClient.Synthesize(ctx, lang2.ToLang5(), text)
if err != nil {
return nil, liberrors.Errorf("faield to u.synthesizerClient.Synthesize. err: %w", err)
}
audioID, err := repo.AddAudio(ctx, lang2.ToLang5(), text, audioContent)
if err != nil {
return nil, liberrors.Errorf("faield toAddAudio. err: %w", err)
}
audioModel, err := domain.NewAudioModel(uint(audioID), lang2.ToLang5(), text, audioContent)
if err != nil {
return nil, liberrors.Errorf("faield NewAudioModel. err: %w", err)
}
return service.NewAudio(audioModel)
}
func (u *userUsecase) FindAudioByAudioID(ctx context.Context, audioID domain.AudioID) (service.Audio, error) {
rf, err := u.rfFunc(ctx, u.db)
if err != nil {
return nil, err
}
repo := rf.NewAudioRepository(ctx)
audio, err := repo.FindAudioByAudioID(ctx, audioID)
if err != nil {
return nil, err
}
return audio, nil
}