Use status-specific errors for non-draft campaigns

Replace ErrCampaignCannotStart and ErrCampaignCannotUpdate with
sentinels per campaign status, mapped through CampaignStatusError
and wrapped with operation-specific fmt.Errorf prefixes.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

pkg/accessreview/campaign_service.go

@@ -159,7 +159,7 @@ func (s *Service) UpdateCampaign(
 			}
 
 			if campaign.Status != coredata.AccessReviewCampaignStatusDraft {
-				return ErrCampaignCannotUpdate
+				return fmt.Errorf("cannot update campaign: %w", CampaignStatusError(campaign.Status))
 			}
 
 			if req.Name != nil && *req.Name != nil {
@@ -242,10 +242,8 @@ func (s *Service) AddCampaignSource(
 			}
 
 			if campaign.Status != coredata.AccessReviewCampaignStatusDraft {
-				return ErrCampaignCannotUpdate
+				return fmt.Errorf("cannot add scope source: %w", CampaignStatusError(campaign.Status))
 			}
-
-			source := &coredata.AccessReviewSource{}
 			if err := source.LoadByID(ctx, conn, scope, req.AccessReviewSourceID); err != nil {
 				if errors.Is(err, coredata.ErrResourceNotFound) {
 					return coredata.ErrResourceNotFound
@@ -291,10 +289,8 @@ func (s *Service) RemoveCampaignSource(
 			}
 
 			if campaign.Status != coredata.AccessReviewCampaignStatusDraft {
-				return ErrCampaignCannotUpdate
+				return fmt.Errorf("cannot remove scope source: %w", CampaignStatusError(campaign.Status))
 			}
-
-			campaignSource := &coredata.AccessReviewCampaignSource{}
 			if err := campaignSource.DeleteByCampaignIDAndAccessReviewSourceID(ctx, conn, scope, campaign.ID, req.AccessReviewSourceID); err != nil {
 				return fmt.Errorf("cannot delete campaign source: %w", err)
 			}
@@ -400,7 +396,7 @@ func (s *Service) StartCampaign(
 			}
 
 			if campaign.Status != coredata.AccessReviewCampaignStatusDraft {
-				return ErrCampaignCannotStart
+				return fmt.Errorf("cannot start campaign: %w", CampaignStatusError(campaign.Status))
 			}
 
 			var campaignSources coredata.AccessReviewCampaignSources

pkg/accessreview/errors.go

@@ -20,10 +20,31 @@
 
 package accessreview
 
-import "errors"
+import (
+	"errors"
+
+	"go.probo.inc/probo/pkg/coredata"
+)
 
 var (
 	ErrCampaignMissingSources = errors.New("cannot start campaign: no scope sources configured")
-	ErrCampaignCannotStart    = errors.New("cannot start campaign: only draft campaigns can be started")
-	ErrCampaignCannotUpdate   = errors.New("cannot update campaign: only draft campaigns can be updated")
+	ErrCampaignInProgress     = errors.New("campaign is in progress")
+	ErrCampaignPendingActions = errors.New("campaign is pending actions")
+	ErrCampaignCompleted      = errors.New("campaign is completed")
+	ErrCampaignCancelled      = errors.New("campaign is cancelled")
 )
+
+func CampaignStatusError(status coredata.AccessReviewCampaignStatus) error {
+	switch status {
+	case coredata.AccessReviewCampaignStatusInProgress:
+		return ErrCampaignInProgress
+	case coredata.AccessReviewCampaignStatusPendingActions:
+		return ErrCampaignPendingActions
+	case coredata.AccessReviewCampaignStatusCompleted:
+		return ErrCampaignCompleted
+	case coredata.AccessReviewCampaignStatusCancelled:
+		return ErrCampaignCancelled
+	default:
+		return ErrCampaignInProgress
+	}
+}

pkg/accessreview/errors_test.go

@@ -0,0 +1,53 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package accessreview
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.probo.inc/probo/pkg/coredata"
+)
+
+func TestCampaignStatusError(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		status coredata.AccessReviewCampaignStatus
+		want   error
+	}{
+		{status: coredata.AccessReviewCampaignStatusInProgress, want: ErrCampaignInProgress},
+		{status: coredata.AccessReviewCampaignStatusPendingActions, want: ErrCampaignPendingActions},
+		{status: coredata.AccessReviewCampaignStatusCompleted, want: ErrCampaignCompleted},
+		{status: coredata.AccessReviewCampaignStatusCancelled, want: ErrCampaignCancelled},
+	}
+
+	for _, tt := range tests {
+		t.Run(string(tt.status), func(t *testing.T) {
+			t.Parallel()
+
+			err := fmt.Errorf("cannot start campaign: %w", CampaignStatusError(tt.status))
+			assert.ErrorIs(t, err, tt.want)
+		})
+	}
+}

pkg/server/api/console/v1/access_review_campaign_resolvers.go

@@ -760,7 +760,10 @@ func (r *mutationResolver) UpdateAccessReviewCampaign(ctx context.Context, input
 			return nil, gqlutils.NotFound(ctx, err)
 		}
 
-		if errors.Is(err, accessreview.ErrCampaignCannotUpdate) {
+		if errors.Is(err, accessreview.ErrCampaignInProgress) ||
+			errors.Is(err, accessreview.ErrCampaignPendingActions) ||
+			errors.Is(err, accessreview.ErrCampaignCompleted) ||
+			errors.Is(err, accessreview.ErrCampaignCancelled) {
 			return nil, gqlutils.Invalid(ctx, err)
 		}
 
@@ -806,7 +809,10 @@ func (r *mutationResolver) StartAccessReviewCampaign(ctx context.Context, input
 	campaign, err := r.accessReview.StartCampaign(ctx, scope, input.AccessReviewCampaignID)
 	if err != nil {
 		if errors.Is(err, accessreview.ErrCampaignMissingSources) ||
-			errors.Is(err, accessreview.ErrCampaignCannotStart) {
+			errors.Is(err, accessreview.ErrCampaignInProgress) ||
+			errors.Is(err, accessreview.ErrCampaignPendingActions) ||
+			errors.Is(err, accessreview.ErrCampaignCompleted) ||
+			errors.Is(err, accessreview.ErrCampaignCancelled) {
 			return nil, gqlutils.Invalid(ctx, err)
 		}
 
@@ -878,6 +884,13 @@ func (r *mutationResolver) AddAccessReviewCampaignSource(ctx context.Context, in
 			return nil, gqlutils.NotFound(ctx, err)
 		}
 
+		if errors.Is(err, accessreview.ErrCampaignInProgress) ||
+			errors.Is(err, accessreview.ErrCampaignPendingActions) ||
+			errors.Is(err, accessreview.ErrCampaignCompleted) ||
+			errors.Is(err, accessreview.ErrCampaignCancelled) {
+			return nil, gqlutils.Invalid(ctx, err)
+		}
+
 		r.logger.ErrorCtx(ctx, "cannot add scope source to access review campaign", log.Error(err))
 
 		return nil, gqlutils.Internal(ctx)