Initial commit: Open sourcing all of the Maple Open Technologies code.

cloud/maplefile-backend/internal/usecase/user/getbyemail.go

@@ -0,0 +1,49 @@
+// codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/usecase/user/getbyemail.go
+package user
+
+import (
+	"context"
+
+	"go.uber.org/zap"
+
+	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/config"
+	dom_user "codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/domain/user"
+	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/pkg/httperror"
+)
+
+type UserGetByEmailUseCase interface {
+	Execute(ctx context.Context, email string) (*dom_user.User, error)
+}
+
+type userGetByEmailUseCaseImpl struct {
+	config *config.Configuration
+	logger *zap.Logger
+	repo   dom_user.Repository
+}
+
+func NewUserGetByEmailUseCase(config *config.Configuration, logger *zap.Logger, repo dom_user.Repository) UserGetByEmailUseCase {
+	logger = logger.Named("UserGetByEmailUseCase")
+	return &userGetByEmailUseCaseImpl{config, logger, repo}
+}
+
+func (uc *userGetByEmailUseCaseImpl) Execute(ctx context.Context, email string) (*dom_user.User, error) {
+	//
+	// STEP 1: Validation.
+	//
+
+	e := make(map[string]string)
+	if email == "" {
+		e["email"] = "missing value"
+	}
+	if len(e) != 0 {
+		uc.logger.Warn("Validation failed for upsert",
+			zap.Any("error", e))
+		return nil, httperror.NewForBadRequest(&e)
+	}
+
+	//
+	// STEP 2: Get from database.
+	//
+
+	return uc.repo.GetByEmail(ctx, email)
+}