bolt: support adding/removing child buckets

db_bolt.go

@@ -94,8 +94,52 @@ func (ld *boltLoadedDatabase) NavChildren(ndata *navData) ([]string, error) {
 	return boltChildBucketNames(ld.db, ndata.bucketPath)
 }
 
-func (ld *boltLoadedDatabase) NavContext(ndata *navData) ([]contextAction, error) {
-	return nil, nil // No special actions are supported
+func (ld *boltLoadedDatabase) NavContext(ndata *navData) (ret []contextAction, err error) {
+	ret = append(ret, contextAction{"Add bucket...", ld.AddChildBucket})
+
+	if len(ndata.bucketPath) > 0 {
+		ret = append(ret, contextAction{"Delete bucket", ld.DeleteBucket})
+	}
+	return
+}
+
+func (ld *boltLoadedDatabase) AddChildBucket(ndata *navData) {
+	bucketName := ""
+	if !vcl.InputQuery(APPNAME, "Enter a name for the new bucket:", &bucketName) {
+		return // cancel
+	}
+
+	err := ld.db.Update(func(tx *bbolt.Tx) error {
+		parent := boltTargetBucket(tx, ndata.bucketPath)
+		if parent != nil {
+			_, err := parent.CreateBucket([]byte(bucketName))
+			return err
+		}
+
+		// Top-level
+		_, err := tx.CreateBucket([]byte(bucketName))
+		return err
+	})
+	if err != nil {
+		vcl.ShowMessageFmt("Error adding bucket: %v", err)
+	}
+}
+
+func (ld *boltLoadedDatabase) DeleteBucket(ndata *navData) {
+	err := ld.db.Update(func(tx *bbolt.Tx) error {
+		// Find parent of this bucket.
+		if len(ndata.bucketPath) >= 2 {
+			// child bucket
+			parent := boltTargetBucket(tx, ndata.bucketPath[0:len(ndata.bucketPath)-1])
+			return parent.DeleteBucket([]byte(ndata.bucketPath[len(ndata.bucketPath)-1]))
+		} else {
+			// top-level bucket
+			return tx.DeleteBucket([]byte(ndata.bucketPath[0]))
+		}
+	})
+	if err != nil {
+		vcl.ShowMessageFmt("Error deleting bucket %q: %v", strings.Join(ndata.bucketPath, `/`), err)
+	}
 }
 
 func (ld *boltLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) {