worktime: use sentinel login state errors

Replace string matching in timer sync with errors.Is and add regression tests.

2 files changed, 28 insertions, 1 deletions

diff --git a/internal/cli/timer.go b/internal/cli/timer.go
index 78d6d8d..46292ad 100644
--- a/internal/cli/timer.go
+++ b/internal/cli/timer.go
@@ -242,7 +242,7 @@ func syncWorktimeWithTimer(start bool) error {
 	}
 
 	// Avoid failing timer commands on no-op state sync mismatches.
-	if strings.Contains(err.Error(), "already logged in") || strings.Contains(err.Error(), "not logged in") {
+	if errors.Is(err, worktime.ErrAlreadyLoggedIn) || errors.Is(err, worktime.ErrNotLoggedIn) {
 		return nil
 	}
 
diff --git a/internal/cli/timer_test.go b/internal/cli/timer_test.go
index 25f9618..32b9b8b 100644
--- a/internal/cli/timer_test.go
+++ b/internal/cli/timer_test.go
@@ -5,6 +5,7 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
+	"time"
 
 	timrTimer "codeberg.org/snonux/timr/internal/timer"
 	"codeberg.org/snonux/timr/internal/worktime"
@@ -113,6 +114,32 @@ func TestTimerAutoWorktimeSync(t *testing.T) {
 	}
 }
 
+func TestTimerAutoWorktimeSyncIgnoresAlreadyLoggedIn(t *testing.T) {
+	setupTimerState(t)
+
+	dbDir := t.TempDir()
+	if _, err := worktime.Login(dbDir, "host-auto", "work", time.Unix(100, 0), "seed"); err != nil {
+		t.Fatalf("seed Login() error = %v", err)
+	}
+
+	cfgPath := writeWorkConfigWithAuto(t, dbDir, "host-auto", true)
+	out, err := runRootCommand("--config", cfgPath, "timer", "start")
+	if err != nil {
+		t.Fatalf("timer start error = %v (output: %q)", err, out)
+	}
+}
+
+func TestTimerAutoWorktimeSyncIgnoresNotLoggedInOnStop(t *testing.T) {
+	setupTimerState(t)
+
+	dbDir := t.TempDir()
+	cfgPath := writeWorkConfigWithAuto(t, dbDir, "host-auto", true)
+	out, err := runRootCommand("--config", cfgPath, "timer", "stop")
+	if err != nil {
+		t.Fatalf("timer stop error = %v (output: %q)", err, out)
+	}
+}
+
 func setupTimerState(t *testing.T) {
 	t.Helper()