Add auth identity legacy backfill and email sync

backend/internal/service/user_service_email_identity_sync_test.go

@@ -0,0 +1,68 @@
+//go:build unit
+
+package service
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+type emailSyncMockUserRepo struct {
+	*mockUserRepo
+	ensureCalls  []ensureEmailCall
+	replaceCalls []replaceEmailCall
+}
+
+func (m *emailSyncMockUserRepo) EnsureEmailAuthIdentity(_ context.Context, userID int64, email string) error {
+	m.ensureCalls = append(m.ensureCalls, ensureEmailCall{userID: userID, email: email})
+	return nil
+}
+
+func (m *emailSyncMockUserRepo) ReplaceEmailAuthIdentity(_ context.Context, userID int64, oldEmail, newEmail string) error {
+	m.replaceCalls = append(m.replaceCalls, replaceEmailCall{
+		userID:   userID,
+		oldEmail: oldEmail,
+		newEmail: newEmail,
+	})
+	return nil
+}
+
+func (m *emailSyncMockUserRepo) GetLatestUsedAtByUserIDs(context.Context, []int64) (map[int64]*time.Time, error) {
+	return map[int64]*time.Time{}, nil
+}
+
+func (m *emailSyncMockUserRepo) GetLatestUsedAtByUserID(context.Context, int64) (*time.Time, error) {
+	return nil, nil
+}
+
+func TestUpdateProfile_ReplacesEmailAuthIdentityWhenEmailChanges(t *testing.T) {
+	repo := &emailSyncMockUserRepo{
+		mockUserRepo: &mockUserRepo{
+			getByIDUser: &User{
+				ID:          19,
+				Email:       "profile-before@example.com",
+				Username:    "tester",
+				Concurrency: 2,
+			},
+		},
+	}
+	svc := NewUserService(repo, nil, nil, nil)
+
+	newEmail := "profile-after@example.com"
+	updated, err := svc.UpdateProfile(context.Background(), 19, UpdateProfileRequest{
+		Email: &newEmail,
+	})
+	require.NoError(t, err)
+	require.NotNil(t, updated)
+	require.Equal(t, newEmail, updated.Email)
+	require.Equal(t, 1, repo.updateCalls)
+	require.Equal(t, []replaceEmailCall{{
+		userID:   19,
+		oldEmail: "profile-before@example.com",
+		newEmail: "profile-after@example.com",
+	}}, repo.replaceCalls)
+	require.Empty(t, repo.ensureCalls)
+}