animation data: Add/Delete entry methods

d2common/d2fileformats/d2animdata/animdata.go

@@ -92,6 +92,28 @@ func (ad *AnimationData) DeleteRecord(name string, recordIdx int) error {
 	return nil
 }
 
+func (ad *AnimationData) AddEntry(name string) error {
+	_, found := ad.entries[name]
+	if found {
+		return fmt.Errorf("entry of name %s already exist", name)
+	}
+
+	ad.entries[name] = make([]*AnimationDataRecord, 0)
+
+	return nil
+}
+
+func (ad *AnimationData) DeleteEntry(name string) error {
+	_, found := ad.entries[name]
+	if !found {
+		return fmt.Errorf("entry named %s doesn't exist", name)
+	}
+
+	delete(ad.entries, name)
+
+	return nil
+}
+
 // Load loads the data into an AnimationData struct
 //nolint:gocognit,funlen // can't reduce
 func Load(data []byte) (*AnimationData, error) {

d2common/d2fileformats/d2animdata/animdata_test.go

@@ -256,3 +256,29 @@ func TestAnimationData_PushRecord(t *testing.T) {
 		t.Fatal("unexpected name of new record was set")
 	}
 }
+
+func TestAnimationData_AddEntry(t *testing.T) {
+	ad := &AnimationData{
+		entries: make(map[string][]*AnimationDataRecord),
+	}
+
+	ad.AddEntry("a")
+
+	if _, found := ad.entries["a"]; !found {
+		t.Fatal("entry wasn't added")
+	}
+}
+
+func TestAnimationData_DeleteEntry(t *testing.T) {
+	ad := &AnimationData{
+		entries: map[string][]*AnimationDataRecord{
+			"a": {{}, {}},
+		},
+	}
+
+	ad.DeleteEntry("a")
+
+	if _, found := ad.entries["a"]; found {
+		t.Fatal("Entry wasn't deleted")
+	}
+}