Respect signed balance in interactive mode

Limit counted work time to 06-20
Use signed daily balance for net calculations
2026-06-29 17:51:14 +02:00 · 2026-06-29 17:41:06 +02:00 · 2026-06-29 17:14:48 +02:00 · 2026-06-29 17:04:03 +02:00
4 changed files with 427 additions and 71 deletions
@@ -14,30 +14,70 @@ Ausgabe:

 ```text
 Netto-Zeit 06:01:14
-+ Minuszeit 01:51:46
+Tagesaldo  -01:51:46
 = Sollzeit  07:53:00
 ```

 Ohne Argumente fragt das Programm die Zeiten interaktiv im Terminal ab. Dabei
-wird kein Webserver gestartet.
+wird kein Webserver gestartet. Beim Tages-Saldo bitte `+` oder `-` angeben;
+eine Eingabe ohne Vorzeichen wird aus Kompatibilitaet als Minuszeit behandelt.

 Kurze Zeiten wie `6:01` oder `01:52` sind ebenfalls erlaubt.

+## Netto-Zeit und Tages-Saldo
+
+Der Tages-Saldo wird mit Vorzeichen angegeben: Minuszeit mit `-`, Pluszeit mit
+`+`.
+
+```sh
+goTimecalc --netto 08:56:12 --saldo +01:03:12
+```
+
+Ausgabe:
+
+```text
+Netto-Zeit 08:56:12
+Tagesaldo  +01:03:12
+= Sollzeit  07:53:00
+```
+
+## Brutto, Pause, Netto und Tages-Saldo
+
+```sh
+goTimecalc --brutto 09:26:12 --pause 00:30:00 --soll 07:53:00
+```
+
+Ausgabe:
+
+```text
+Brutto-Zeit 09:26:12
+- Pause     00:30:00
+= Netto-Zeit 08:56:12
+- Sollzeit  07:53:00
+= Tagesaldo +01:03:12
+```
+
+Der Tages-Saldo kann positiv oder negativ sein.
+
 ## Start, Ende und Pause

 ```sh
 goTimecalc --start 08:00 --ende 16:30 --pause 00:30 --soll 07:53
 ```

+Bei Start-/Endzeit zaehlt nur Arbeitszeit zwischen `06:00` und `20:00`.
+Zeit davor oder danach wird aus der Brutto-Zeit herausgerechnet.
+
 Beispielausgabe:

 ```text
-Start     08:00:00
-Ende      16:30:00
- Pause   00:30:00
-= Netto   08:00:00
-Soll      07:53:00
-Ueberzeit +00:07:00
+Start      08:00:00
+Ende       16:30:00
+Brutto-Zeit 08:30:00
+- Pause     00:30:00
+= Netto-Zeit 08:00:00
+- Sollzeit  07:53:00
+= Tagesaldo +00:07:00
 ```

 Wenn die Endzeit kleiner als die Startzeit ist, wird eine Nachtschicht angenommen:
@@ -46,6 +86,9 @@ Wenn die Endzeit kleiner als die Startzeit ist, wird eine Nachtschicht angenomme
 goTimecalc --start 22:00 --ende 06:00 --pause 00:30
 ```

+Da diese Zeit komplett ausserhalb `06:00` bis `20:00` liegt, wird sie nicht als
+Arbeitszeit angerechnet.
+
 ## Webinterface

 Der Webserver startet nur, wenn `--web` angegeben wird:
@@ -14,6 +14,12 @@ import (

 const appName = "goTimecalc"

+const (
+	workdayStart = 6 * 3600
+	workdayEnd   = 20 * 3600
+	daySeconds   = 24 * 3600
+)
+
 type dayList []dayEntry

 type dayEntry struct {
@@ -42,7 +48,7 @@ func run(args []string, out io.Writer) error {
 			return fmt.Errorf("Minuszeit: %w", err)
 		}

-		printSollzeit(out, netto, minuszeit)
+		printSollzeitFromSaldo(out, netto, -minuszeit)
 		return nil
 	}

@@ -54,6 +60,8 @@ func run(args []string, out io.Writer) error {
 	addrInput := flags.String("addr", "127.0.0.1:8080", "Adresse fuer das Webinterface")
 	nettoInput := flags.String("netto", "", "Netto-Zeit, z.B. 06:01 oder 06:01:14")
 	minusInput := flags.String("minus", "", "Minuszeit, z.B. 01:52")
+	saldoInput := flags.String("saldo", "", "Tagesaldo mit Vorzeichen, z.B. -01:52 oder +01:03")
+	bruttoInput := flags.String("brutto", "", "Brutto-Zeit, z.B. 09:26:12")
 	startInput := flags.String("start", "", "Startzeit, z.B. 08:00")
 	endInput := flags.String("ende", "", "Endzeit, z.B. 16:30")
 	pauseInput := flags.String("pause", "00:00", "Pause, z.B. 00:30")
@@ -64,6 +72,8 @@ func run(args []string, out io.Writer) error {
 	flags.Usage = func() {
 		fmt.Fprintln(out, "Nutzung:")
 		fmt.Fprintln(out, "  goTimecalc 06:01:14 01:51:46")
+		fmt.Fprintln(out, "  goTimecalc --netto 08:56:12 --saldo +01:03:12")
+		fmt.Fprintln(out, "  goTimecalc --brutto 09:26:12 --pause 00:30 --soll 07:53")
 		fmt.Fprintln(out, "  goTimecalc --start 08:00 --ende 16:30 --pause 00:30 --soll 07:53")
 		fmt.Fprintln(out, "  goTimecalc --day 08:00-16:30,00:30 --day 09:00-17:00 --soll 15:46")
 		fmt.Fprintln(out, "  goTimecalc --set-soll 07:53")
@@ -103,20 +113,30 @@ func run(args []string, out io.Writer) error {
 		return runDays(out, days, *sollInput)
 	}

+	if *bruttoInput != "" {
+		return runBruttoPause(out, *bruttoInput, *pauseInput, *sollInput)
+	}
+
 	if *startInput != "" || *endInput != "" {
 		return runStartEnd(out, *startInput, *endInput, *pauseInput, *sollInput)
 	}

-	if *nettoInput != "" || *minusInput != "" {
-		return runNettoMinus(out, *nettoInput, *minusInput)
+	if *nettoInput != "" || *minusInput != "" || *saldoInput != "" {
+		return runNettoSaldo(out, *nettoInput, *saldoInput, *minusInput)
 	}

 	return runInteractive(out)
 }

-func runNettoMinus(out io.Writer, nettoInput string, minusInput string) error {
-	if nettoInput == "" || minusInput == "" {
-		return errors.New("--netto und --minus muessen zusammen angegeben werden")
+func runNettoSaldo(out io.Writer, nettoInput string, saldoInput string, minusInput string) error {
+	if nettoInput == "" {
+		return errors.New("--netto muss angegeben werden")
+	}
+	if saldoInput == "" && minusInput == "" {
+		return errors.New("--saldo mit Vorzeichen angeben, zum Beispiel: --saldo -01:52 oder --saldo +01:03")
+	}
+	if saldoInput != "" && minusInput != "" {
+		return errors.New("bitte entweder --saldo oder --minus angeben, nicht beides")
 	}

 	netto, err := parseDuration(nettoInput)
@@ -124,15 +144,38 @@ func runNettoMinus(out io.Writer, nettoInput string, minusInput string) error {
 		return fmt.Errorf("Netto-Zeit: %w", err)
 	}

-	minuszeit, err := parseDuration(minusInput)
-	if err != nil {
-		return fmt.Errorf("Minuszeit: %w", err)
+	saldo := 0
+	if saldoInput != "" {
+		saldo, err = parseSignedDuration(saldoInput)
+		if err != nil {
+			return fmt.Errorf("Tagesaldo: %w", err)
+		}
+	} else {
+		minuszeit, err := parseDuration(minusInput)
+		if err != nil {
+			return fmt.Errorf("Minuszeit: %w", err)
+		}
+		saldo = -minuszeit
 	}

-	printSollzeit(out, netto, minuszeit)
+	printSollzeitFromSaldo(out, netto, saldo)
 	return nil
 }

+func runBruttoPause(out io.Writer, bruttoInput string, pauseInput string, sollInput string) error {
+	brutto, err := parseDuration(bruttoInput)
+	if err != nil {
+		return fmt.Errorf("Brutto-Zeit: %w", err)
+	}
+
+	pause, err := parseDuration(pauseInput)
+	if err != nil {
+		return fmt.Errorf("Pause: %w", err)
+	}
+
+	return printBruttoNetto(out, brutto, pause, sollInput)
+}
+
 func runStartEnd(out io.Writer, startInput string, endInput string, pauseInput string, sollInput string) error {
 	if startInput == "" || endInput == "" {
 		return errors.New("--start und --ende muessen zusammen angegeben werden")
@@ -153,24 +196,18 @@ func runStartEnd(out io.Writer, startInput string, endInput string, pauseInput s
 		return fmt.Errorf("Pause: %w", err)
 	}

-	netto := workDuration(start, end, pause)
-	if netto < 0 {
-		return errors.New("Pause ist laenger als die Arbeitszeit")
-	}
-
 	fmt.Fprintf(out, "Start     %8s\n", formatDuration(start))
 	fmt.Fprintf(out, "Ende      %8s\n", formatDuration(end))
-	fmt.Fprintf(out, "- Pause   %8s\n", formatDuration(pause))
-	fmt.Fprintf(out, "= Netto   %8s\n", formatDuration(netto))

-	return printBalance(out, netto, sollInput)
+	brutto := grossDuration(start, end)
+	return printBruttoNetto(out, brutto, pause, sollInput)
 }

 func runDays(out io.Writer, days dayList, sollInput string) error {
 	total := 0

 	for i, day := range days {
-		netto := workDuration(day.start, day.end, day.pause)
+		netto := grossDuration(day.start, day.end) - day.pause
 		if netto < 0 {
 			return fmt.Errorf("Tag %d: Pause ist laenger als die Arbeitszeit", i+1)
 		}
@@ -191,19 +228,32 @@ func runInteractive(out io.Writer) error {
 		return err
 	}

-	minuszeit, err := promptDuration(reader, "Minuszeit: ")
+	saldo, err := promptSaldo(reader, "Tagesaldo (+/-): ")
 	if err != nil {
 		return err
 	}

-	printSollzeit(out, netto, minuszeit)
+	printSollzeitFromSaldo(out, netto, saldo)
 	return nil
 }

-func printSollzeit(out io.Writer, netto int, minuszeit int) {
+func printSollzeitFromSaldo(out io.Writer, netto int, saldo int) {
 	fmt.Fprintf(out, "Netto-Zeit %8s\n", formatDuration(netto))
-	fmt.Fprintf(out, "+ Minuszeit %8s\n", formatDuration(minuszeit))
-	fmt.Fprintf(out, "= Sollzeit  %8s\n", formatDuration(netto+minuszeit))
+	fmt.Fprintf(out, "Tagesaldo  %s\n", formatSignedDuration(saldo))
+	fmt.Fprintf(out, "= Sollzeit  %8s\n", formatDuration(netto-saldo))
+}
+
+func printBruttoNetto(out io.Writer, brutto int, pause int, sollInput string) error {
+	netto := brutto - pause
+	if netto < 0 {
+		return errors.New("Pause ist laenger als die Brutto-Zeit")
+	}
+
+	fmt.Fprintf(out, "Brutto-Zeit %8s\n", formatDuration(brutto))
+	fmt.Fprintf(out, "- Pause     %8s\n", formatDuration(pause))
+	fmt.Fprintf(out, "= Netto-Zeit %8s\n", formatDuration(netto))
+
+	return printBalance(out, netto, sollInput)
 }

 func printBalance(out io.Writer, netto int, sollInput string) error {
@@ -216,13 +266,13 @@ func printBalance(out io.Writer, netto int, sollInput string) error {
 	}

 	diff := netto - soll
-	fmt.Fprintf(out, "Soll      %8s\n", formatDuration(soll))
+	fmt.Fprintf(out, "- Sollzeit  %8s\n", formatDuration(soll))
 	if diff >= 0 {
-		fmt.Fprintf(out, "Ueberzeit +%s\n", formatDuration(diff))
+		fmt.Fprintf(out, "= Tagesaldo +%s\n", formatDuration(diff))
 		return nil
 	}

-	fmt.Fprintf(out, "Minuszeit -%s\n", formatDuration(-diff))
+	fmt.Fprintf(out, "= Tagesaldo -%s\n", formatDuration(-diff))
 	return nil
 }

@@ -262,6 +312,22 @@ func promptDuration(reader *bufio.Reader, label string) (int, error) {
 	return value, nil
 }

+func promptSaldo(reader *bufio.Reader, label string) (int, error) {
+	fmt.Print(label)
+
+	input, err := reader.ReadString('\n')
+	if err != nil {
+		return 0, err
+	}
+
+	value, err := parseSaldoInput(strings.TrimSpace(input))
+	if err != nil {
+		return 0, fmt.Errorf("%s%w", strings.TrimSuffix(label, ": "), err)
+	}
+
+	return value, nil
+}
+
 func parseDuration(input string) (int, error) {
 	parts := strings.Split(strings.TrimSpace(input), ":")
 	if len(parts) < 2 || len(parts) > 3 {
@@ -293,6 +359,44 @@ func parseDuration(input string) (int, error) {
 	return hours*3600 + minutes*60 + seconds, nil
 }

+func parseSignedDuration(input string) (int, error) {
+	input = strings.TrimSpace(input)
+	if input == "" {
+		return 0, errors.New("Zeit fehlt")
+	}
+
+	sign := input[0]
+	if sign != '+' && sign != '-' {
+		return 0, errors.New("Tagesaldo braucht ein Vorzeichen, zum Beispiel -01:52 oder +01:03")
+	}
+
+	value, err := parseDuration(input[1:])
+	if err != nil {
+		return 0, err
+	}
+	if sign == '-' {
+		return -value, nil
+	}
+	return value, nil
+}
+
+func parseSaldoInput(input string) (int, error) {
+	input = strings.TrimSpace(input)
+	if input == "" {
+		return 0, errors.New("Zeit fehlt")
+	}
+
+	if strings.HasPrefix(input, "+") || strings.HasPrefix(input, "-") {
+		return parseSignedDuration(input)
+	}
+
+	value, err := parseDuration(input)
+	if err != nil {
+		return 0, err
+	}
+	return -value, nil
+}
+
 func parseClock(input string) (int, error) {
 	value, err := parseDuration(input)
 	if err != nil {
@@ -318,10 +422,31 @@ func parsePart(input string, label string) (int, error) {
 }

 func workDuration(start int, end int, pause int) int {
+	return grossDuration(start, end) - pause
+}
+
+func grossDuration(start int, end int) int {
 	if end < start {
-		end += 24 * 3600
+		end += daySeconds
 	}
-	return end - start - pause
+
+	total := 0
+	for dayStart := 0; dayStart <= end; dayStart += daySeconds {
+		windowStart := dayStart + workdayStart
+		windowEnd := dayStart + workdayEnd
+		total += overlapSeconds(start, end, windowStart, windowEnd)
+	}
+
+	return total
+}
+
+func overlapSeconds(start int, end int, windowStart int, windowEnd int) int {
+	from := max(start, windowStart)
+	to := min(end, windowEnd)
+	if to <= from {
+		return 0
+	}
+	return to - from
 }

 func formatDuration(totalSeconds int) string {
@@ -332,6 +457,13 @@ func formatDuration(totalSeconds int) string {
 	return fmt.Sprintf("%02d:%02d:%02d", hours, minutes, seconds)
 }

+func formatSignedDuration(totalSeconds int) string {
+	if totalSeconds < 0 {
+		return "-" + formatDuration(-totalSeconds)
+	}
+	return "+" + formatDuration(totalSeconds)
+}
+
 func (d *dayList) String() string {
 	return fmt.Sprint([]dayEntry(*d))
 }
@@ -11,7 +11,7 @@ func TestOldNettoMinusUsage(t *testing.T) {

 	want := strings.Join([]string{
 		"Netto-Zeit 06:01:14",
-		"+ Minuszeit 01:51:46",
+		"Tagesaldo  -01:51:46",
 		"= Sollzeit  07:53:00",
 		"",
 	}, "\n")
@@ -21,12 +21,31 @@ func TestOldNettoMinusUsage(t *testing.T) {
 	}
 }

+func TestNettoSaldoUsage(t *testing.T) {
+	output := runCommand(t, "--netto", "08:56:12", "--saldo", "+01:03:12")
+
+	assertContains(t, output, "Netto-Zeit 08:56:12")
+	assertContains(t, output, "Tagesaldo  +01:03:12")
+	assertContains(t, output, "= Sollzeit  07:53:00")
+}
+
 func TestStartEndWithPauseAndSoll(t *testing.T) {
 	output := runCommand(t, "--start", "08:00", "--ende", "16:30", "--pause", "00:30", "--soll", "07:53")

-	assertContains(t, output, "= Netto   08:00:00")
-	assertContains(t, output, "Soll      07:53:00")
-	assertContains(t, output, "Ueberzeit +00:07:00")
+	assertContains(t, output, "Brutto-Zeit 08:30:00")
+	assertContains(t, output, "= Netto-Zeit 08:00:00")
+	assertContains(t, output, "- Sollzeit  07:53:00")
+	assertContains(t, output, "= Tagesaldo +00:07:00")
+}
+
+func TestBruttoPauseWithPositiveTagesaldo(t *testing.T) {
+	output := runCommand(t, "--brutto", "09:26:12", "--pause", "00:30:00", "--soll", "07:53:00")
+
+	assertContains(t, output, "Brutto-Zeit 09:26:12")
+	assertContains(t, output, "- Pause     00:30:00")
+	assertContains(t, output, "= Netto-Zeit 08:56:12")
+	assertContains(t, output, "- Sollzeit  07:53:00")
+	assertContains(t, output, "= Tagesaldo +01:03:12")
 }

 func TestMultipleDays(t *testing.T) {
@@ -39,7 +58,7 @@ func TestMultipleDays(t *testing.T) {
 	assertContains(t, output, "Tag 1    08:00:00")
 	assertContains(t, output, "Tag 2    07:30:00")
 	assertContains(t, output, "= Summe   15:30:00")
-	assertContains(t, output, "Minuszeit -00:16:00")
+	assertContains(t, output, "= Tagesaldo -00:16:00")
 }

 func TestShortDurationInput(t *testing.T) {
@@ -53,12 +72,49 @@ func TestShortDurationInput(t *testing.T) {
 	}
 }

-func TestOvernightWorkDuration(t *testing.T) {
-	start, err := parseClock("22:00")
+func TestSignedDurationRequiresSign(t *testing.T) {
+	if _, err := parseSignedDuration("01:03"); err == nil {
+		t.Fatal("expected missing sign error")
+	}
+
+	got, err := parseSignedDuration("-01:03")
 	if err != nil {
 		t.Fatal(err)
 	}
-	end, err := parseClock("06:00")
+	if got != -3780 {
+		t.Fatalf("want -3780 seconds, got %d", got)
+	}
+}
+
+func TestSaldoInputAcceptsSignsAndLegacyMinus(t *testing.T) {
+	tests := []struct {
+		input string
+		want  int
+	}{
+		{input: "+00:12:25", want: 745},
+		{input: "-00:12:25", want: -745},
+		{input: "00:12:25", want: -745},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.input, func(t *testing.T) {
+			got, err := parseSaldoInput(tt.input)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if got != tt.want {
+				t.Fatalf("want %d seconds, got %d", tt.want, got)
+			}
+		})
+	}
+}
+
+func TestOvernightWorkDuration(t *testing.T) {
+	start, err := parseClock("19:00")
+	if err != nil {
+		t.Fatal(err)
+	}
+	end, err := parseClock("07:00")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -67,8 +123,39 @@ func TestOvernightWorkDuration(t *testing.T) {
 		t.Fatal(err)
 	}

-	if got := workDuration(start, end, pause); got != 27000 {
-		t.Fatalf("want 27000 seconds, got %d", got)
+	if got := workDuration(start, end, pause); got != 5400 {
+		t.Fatalf("want 5400 seconds, got %d", got)
+	}
+}
+
+func TestGrossDurationOnlyCountsWorkdayWindow(t *testing.T) {
+	tests := []struct {
+		name  string
+		start string
+		end   string
+		want  int
+	}{
+		{name: "full span is capped", start: "05:00", end: "21:00", want: 14 * 3600},
+		{name: "after workday is removed", start: "19:00", end: "22:00", want: 1 * 3600},
+		{name: "overnight counts both workday windows", start: "19:00", end: "07:00", want: 2 * 3600},
+		{name: "outside workday only", start: "22:00", end: "05:00", want: 0},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			start, err := parseClock(tt.start)
+			if err != nil {
+				t.Fatal(err)
+			}
+			end, err := parseClock(tt.end)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if got := grossDuration(start, end); got != tt.want {
+				t.Fatalf("want %d seconds, got %d", tt.want, got)
+			}
+		})
 	}
 }

@@ -87,8 +174,39 @@ func TestWebRangeCalculation(t *testing.T) {
 	if len(resp.Lines) == 0 {
 		t.Fatal("expected result lines")
 	}
-	assertLine(t, resp.Lines, "= Netto", "08:00:00")
-	assertLine(t, resp.Lines, "Ueberzeit", "+00:07:00")
+	assertLine(t, resp.Lines, "Brutto-Zeit", "08:30:00")
+	assertLine(t, resp.Lines, "= Netto-Zeit", "08:00:00")
+	assertLine(t, resp.Lines, "= Tagesaldo", "+00:07:00")
+}
+
+func TestWebNettoSaldoCalculation(t *testing.T) {
+	resp, err := calculateWeb(webCalcRequest{
+		Mode:  "netto",
+		Netto: "08:56:12",
+		Saldo: "+01:03:12",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	assertLine(t, resp.Lines, "Tagesaldo", "+01:03:12")
+	assertLine(t, resp.Lines, "= Sollzeit", "07:53:00")
+}
+
+func TestWebBruttoCalculation(t *testing.T) {
+	resp, err := calculateWeb(webCalcRequest{
+		Mode:   "brutto",
+		Brutto: "09:26:12",
+		Pause:  "00:30:00",
+		Soll:   "07:53:00",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	assertLine(t, resp.Lines, "Brutto-Zeit", "09:26:12")
+	assertLine(t, resp.Lines, "= Netto-Zeit", "08:56:12")
+	assertLine(t, resp.Lines, "= Tagesaldo", "+01:03:12")
 }

 func TestWebDayCalculation(t *testing.T) {
@@ -105,7 +223,7 @@ func TestWebDayCalculation(t *testing.T) {
 	}

 	assertLine(t, resp.Lines, "= Summe", "15:30:00")
-	assertLine(t, resp.Lines, "Minuszeit", "-00:16:00")
+	assertLine(t, resp.Lines, "= Tagesaldo", "-00:16:00")
 }

 func runCommand(t *testing.T, args ...string) string {
@@ -12,6 +12,8 @@ type webCalcRequest struct {
 	Mode       string        `json:"mode"`
 	Netto      string        `json:"netto"`
 	Minus      string        `json:"minus"`
+	Saldo      string        `json:"saldo"`
+	Brutto     string        `json:"brutto"`
 	Start      string        `json:"start"`
 	End        string        `json:"end"`
 	Pause      string        `json:"pause"`
@@ -93,6 +95,8 @@ func calculateWeb(req webCalcRequest) (webCalcResponse, error) {
 	switch mode {
 	case "netto":
 		return calculateWebNetto(req)
+	case "brutto":
+		return calculateWebBrutto(req)
 	case "range":
 		return calculateWebRange(req)
 	case "days":
@@ -107,20 +111,56 @@ func calculateWebNetto(req webCalcRequest) (webCalcResponse, error) {
 	if err != nil {
 		return webCalcResponse{}, fmt.Errorf("Netto-Zeit: %w", err)
 	}
-	minus, err := parseDuration(req.Minus)
-	if err != nil {
-		return webCalcResponse{}, fmt.Errorf("Minuszeit: %w", err)
+
+	saldoInput := req.Saldo
+	if strings.TrimSpace(saldoInput) == "" {
+		saldoInput = req.Minus
+	}
+
+	var saldo int
+	if strings.TrimSpace(saldoInput) == "" {
+		return webCalcResponse{}, fmt.Errorf("Tagesaldo fehlt")
+	}
+	if strings.HasPrefix(strings.TrimSpace(saldoInput), "+") || strings.HasPrefix(strings.TrimSpace(saldoInput), "-") {
+		saldo, err = parseSignedDuration(saldoInput)
+		if err != nil {
+			return webCalcResponse{}, fmt.Errorf("Tagesaldo: %w", err)
+		}
+	} else {
+		minus, err := parseDuration(saldoInput)
+		if err != nil {
+			return webCalcResponse{}, fmt.Errorf("Minuszeit: %w", err)
+		}
+		saldo = -minus
 	}

 	lines := []resultLine{
 		{Label: "Netto-Zeit", Value: formatDuration(netto)},
-		{Label: "+ Minuszeit", Value: formatDuration(minus)},
-		{Label: "= Sollzeit", Value: formatDuration(netto + minus), Kind: "total"},
+		{Label: "Tagesaldo", Value: formatSignedDuration(saldo)},
+		{Label: "= Sollzeit", Value: formatDuration(netto - saldo), Kind: "total"},
 	}

 	return webCalcResponse{Lines: lines}, nil
 }

+func calculateWebBrutto(req webCalcRequest) (webCalcResponse, error) {
+	brutto, err := parseDuration(req.Brutto)
+	if err != nil {
+		return webCalcResponse{}, fmt.Errorf("Brutto-Zeit: %w", err)
+	}
+
+	pauseInput := req.Pause
+	if strings.TrimSpace(pauseInput) == "" {
+		pauseInput = "00:00"
+	}
+	pause, err := parseDuration(pauseInput)
+	if err != nil {
+		return webCalcResponse{}, fmt.Errorf("Pause: %w", err)
+	}
+
+	return webBruttoNettoResponse(brutto, pause, req)
+}
+
 func calculateWebRange(req webCalcRequest) (webCalcResponse, error) {
 	start, err := parseClock(req.Start)
 	if err != nil {
@@ -140,23 +180,37 @@ func calculateWebRange(req webCalcRequest) (webCalcResponse, error) {
 		return webCalcResponse{}, fmt.Errorf("Pause: %w", err)
 	}

-	netto := workDuration(start, end, pause)
-	if netto < 0 {
-		return webCalcResponse{}, fmt.Errorf("Pause ist laenger als die Arbeitszeit")
-	}
-
 	lines := []resultLine{
 		{Label: "Start", Value: formatDuration(start)},
 		{Label: "Ende", Value: formatDuration(end)},
-		{Label: "- Pause", Value: formatDuration(pause)},
-		{Label: "= Netto", Value: formatDuration(netto), Kind: "total"},
 	}

+	brutto := grossDuration(start, end)
+	resp, err := webBruttoNettoResponse(brutto, pause, req)
+	if err != nil {
+		return webCalcResponse{}, err
+	}
+	resp.Lines = append(lines, resp.Lines...)
+	return resp, nil
+}
+
+func webBruttoNettoResponse(brutto int, pause int, req webCalcRequest) (webCalcResponse, error) {
+	netto := brutto - pause
+	if netto < 0 {
+		return webCalcResponse{}, fmt.Errorf("Pause ist laenger als die Brutto-Zeit")
+	}
+
+	lines := []resultLine{
+		{Label: "Brutto-Zeit", Value: formatDuration(brutto)},
+		{Label: "- Pause", Value: formatDuration(pause)},
+		{Label: "= Netto-Zeit", Value: formatDuration(netto), Kind: "total"},
+	}
+
+	var err error
 	lines, err = appendSollBalance(lines, netto, req.Soll)
 	if err != nil {
 		return webCalcResponse{}, err
 	}
-
 	if req.SetDefault && strings.TrimSpace(req.Soll) != "" {
 		soll, err := parseDuration(req.Soll)
 		if err != nil {
@@ -241,12 +295,12 @@ func appendSollBalance(lines []resultLine, netto int, sollInput string) ([]resul
 		return lines, nil
 	}

-	lines = append(lines, resultLine{Label: "Soll", Value: formatDuration(soll)})
+	lines = append(lines, resultLine{Label: "- Sollzeit", Value: formatDuration(soll)})
 	diff := netto - soll
 	if diff >= 0 {
-		return append(lines, resultLine{Label: "Ueberzeit", Value: "+" + formatDuration(diff), Kind: "positive"}), nil
+		return append(lines, resultLine{Label: "= Tagesaldo", Value: "+" + formatDuration(diff), Kind: "positive"}), nil
 	}
-	return append(lines, resultLine{Label: "Minuszeit", Value: "-" + formatDuration(-diff), Kind: "negative"}), nil
+	return append(lines, resultLine{Label: "= Tagesaldo", Value: "-" + formatDuration(-diff), Kind: "negative"}), nil
 }

 const webPageHTML = `<!doctype html>
@@ -310,7 +364,7 @@ h1 {
 }
 .tabs {
  display: grid;
-  grid-template-columns: repeat(3, 1fr);
+  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 18px;
 }
@@ -449,7 +503,8 @@ input:focus {
    <section class="panel">
      <nav class="tabs" aria-label="Rechenmodus">
        <button class="tab active" data-mode="range" type="button">Start / Ende</button>
-        <button class="tab" data-mode="netto" type="button">Netto + Minus</button>
+        <button class="tab" data-mode="brutto" type="button">Brutto / Pause</button>
+        <button class="tab" data-mode="netto" type="button">Netto / Saldo</button>
        <button class="tab" data-mode="days" type="button">Mehrere Tage</button>
      </nav>

@@ -462,10 +517,17 @@ input:focus {
          </div>
        </div>

+        <div id="mode-brutto" class="mode">
+          <div class="grid">
+            <label>Brutto-Zeit <input id="brutto" value="09:26:12" inputmode="numeric"></label>
+            <label>Pause <input id="brutto-pause" value="00:30:00" inputmode="numeric"></label>
+          </div>
+        </div>
+
        <div id="mode-netto" class="mode">
          <div class="grid">
            <label>Netto-Zeit <input id="netto" value="06:01:14" inputmode="numeric"></label>
-            <label>Minuszeit <input id="minus" value="01:51:46" inputmode="numeric"></label>
+            <label>Tagesaldo <input id="saldo" value="-01:51:46" inputmode="numeric"></label>
          </div>
        </div>

@@ -536,10 +598,11 @@ function payload() {
  return {
    mode: activeMode,
    netto: document.querySelector("#netto").value,
-    minus: document.querySelector("#minus").value,
+    saldo: document.querySelector("#saldo").value,
+    brutto: document.querySelector("#brutto").value,
    start: document.querySelector("#start").value,
    end: document.querySelector("#end").value,
-    pause: document.querySelector("#pause").value,
+    pause: activeMode === "brutto" ? document.querySelector("#brutto-pause").value : document.querySelector("#pause").value,
    soll: document.querySelector("#soll").value,
    setDefault: document.querySelector("#set-default").checked,
    days: dayPayload()
Author	SHA1	Message	Date
spok	5fdf2e7cb0	Respect signed balance in interactive mode	2026-06-29 17:51:14 +02:00
spok	0de4425bff	Limit counted work time to 06-20	2026-06-29 17:41:06 +02:00
spok	bb58bdfaee	Use signed daily balance for net calculations	2026-06-29 17:14:48 +02:00
spok	94a0b86620	Add gross time and daily balance calculation	2026-06-29 17:04:03 +02:00