add precheck function

src/internal/operations/backup.go

@@ -11,6 +11,7 @@ import (
 	"github.com/alcionai/corso/src/internal/common/dttm"
 	"github.com/alcionai/corso/src/internal/common/idname"
 	"github.com/alcionai/corso/src/internal/common/prefixmatcher"
+	"github.com/alcionai/corso/src/internal/connector/graph"
 	"github.com/alcionai/corso/src/internal/data"
 	"github.com/alcionai/corso/src/internal/diagnostics"
 	"github.com/alcionai/corso/src/internal/events"
@@ -29,6 +30,7 @@ import (
 	"github.com/alcionai/corso/src/pkg/logger"
 	"github.com/alcionai/corso/src/pkg/path"
 	"github.com/alcionai/corso/src/pkg/selectors"
+	"github.com/alcionai/corso/src/pkg/services/m365/api"
 	"github.com/alcionai/corso/src/pkg/store"
 )
 
@@ -119,6 +121,44 @@ type backupStats struct {
 	resourceCount int
 }
 
+func Precheck(
+	ctx context.Context,
+	account account.Account,
+	service path.ServiceType,
+	userID string,
+) error {
+	if service == path.SharePointService {
+		// No "enabled" check required for sharepoint
+		return nil
+	}
+
+	cred, err := account.M365Config()
+	if err != nil {
+		return clues.Wrap(err, "getting creds")
+	}
+
+	client, err := api.NewClient(cred)
+	if err != nil {
+		return clues.Wrap(err, "constructing api client")
+	}
+
+	ui, err := client.Users().GetInfo(ctx, userID)
+	if err != nil {
+		return clues.Wrap(err, "unable to get user info")
+	}
+
+	if ui == nil || len(ui.ServicesEnabled) == 0 {
+		return graph.ErrServiceNotEnabled
+	}
+
+	_, ok := ui.ServicesEnabled[service]
+	if !ok {
+		return graph.ErrServiceNotEnabled
+	}
+
+	return nil
+}
+
 // ---------------------------------------------------------------------------
 // Primary Controller
 // ---------------------------------------------------------------------------
@@ -151,6 +191,12 @@ func (op *BackupOperation) Run(ctx context.Context) (err error) {
 		sstore    = streamstore.NewStreamer(op.kopia, op.account.ID(), op.Selectors.PathService())
 	)
 
+	err = Precheck(ctx, op.account, op.Selectors.PathService(), op.Selectors.DiscreteOwner)
+	if err != nil {
+		logger.CtxErr(ctx, err).Error("running backup")
+		op.Errors.Fail(clues.Wrap(err, "running backup"))
+	}
+
 	op.Results.BackupID = model.StableID(uuid.NewString())
 
 	ctx = clues.Add(