Add niceties to time page

timewarrior/timewarrior.go

@@ -31,6 +31,7 @@ type TimeWarrior interface {
 	CancelTracking() error
 	DeleteInterval(id int) error
 	FillInterval(id int) error
+	JoinInterval(id int) error
 	ModifyInterval(interval *Interval, adjust bool) error
 	GetSummary(filter ...string) string
 	GetActive() *Interval
@@ -232,6 +233,21 @@ func (ts *TimeSquire) FillInterval(id int) error {
 	return nil
 }
 
+func (ts *TimeSquire) JoinInterval(id int) error {
+	ts.mutex.Lock()
+	defer ts.mutex.Unlock()
+
+	// Join the current interval with the previous one
+	// The previous interval has id+1 (since intervals are ordered newest first)
+	cmd := exec.Command(twBinary, append(ts.defaultArgs, []string{"join", fmt.Sprintf("@%d", id+1), fmt.Sprintf("@%d", id)}...)...)
+	if err := cmd.Run(); err != nil {
+		slog.Error("Failed joining interval:", err)
+		return err
+	}
+
+	return nil
+}
+
 func (ts *TimeSquire) ModifyInterval(interval *Interval, adjust bool) error {
 	ts.mutex.Lock()
 	defer ts.mutex.Unlock()