cmd/bd: add unit coverage for show/update/close

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

cmd/bd/show_unit_helpers.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/steveyegge/beads/internal/storage"
+	"github.com/steveyegge/beads/internal/types"
+)
+
+func validateIssueUpdatable(id string, issue *types.Issue) error {
+	if issue == nil {
+		return nil
+	}
+	if issue.IsTemplate {
+		return fmt.Errorf("Error: cannot update template %s: templates are read-only; use 'bd molecule instantiate' to create a work item", id)
+	}
+	return nil
+}
+
+func validateIssueClosable(id string, issue *types.Issue, force bool) error {
+	if issue == nil {
+		return nil
+	}
+	if issue.IsTemplate {
+		return fmt.Errorf("Error: cannot close template %s: templates are read-only", id)
+	}
+	if !force && issue.Status == types.StatusPinned {
+		return fmt.Errorf("Error: cannot close pinned issue %s (use --force to override)", id)
+	}
+	return nil
+}
+
+func applyLabelUpdates(ctx context.Context, st storage.Storage, issueID, actor string, setLabels, addLabels, removeLabels []string) error {
+	// Set labels (replaces all existing labels)
+	if len(setLabels) > 0 {
+		currentLabels, err := st.GetLabels(ctx, issueID)
+		if err != nil {
+			return err
+		}
+		for _, label := range currentLabels {
+			if err := st.RemoveLabel(ctx, issueID, label, actor); err != nil {
+				return err
+			}
+		}
+		for _, label := range setLabels {
+			if err := st.AddLabel(ctx, issueID, label, actor); err != nil {
+				return err
+			}
+		}
+	}
+
+	// Add labels
+	for _, label := range addLabels {
+		if err := st.AddLabel(ctx, issueID, label, actor); err != nil {
+			return err
+		}
+	}
+
+	// Remove labels
+	for _, label := range removeLabels {
+		if err := st.RemoveLabel(ctx, issueID, label, actor); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}