From 42114781ee9d4af802ba02607cd1af4fb839fd24 Mon Sep 17 00:00:00 2001
From: Jan Hensel <ja_he@uni-bremen.de>
Date: Thu, 2 Feb 2023 13:27:27 +0100
Subject: [PATCH] feat(timesheet): Allow specification of duration format

---
 internal/control/cli/timesheet.go | 35 ++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/internal/control/cli/timesheet.go b/internal/control/cli/timesheet.go
index e67f8e7a..35944a0a 100644
--- a/internal/control/cli/timesheet.go
+++ b/internal/control/cli/timesheet.go
@@ -7,6 +7,7 @@ import (
 	"os"
 	"regexp"
 	"strings"
+	"time"
 
 	"github.com/ja-he/dayplan/internal/config"
 	"github.com/ja-he/dayplan/internal/control"
@@ -37,6 +38,7 @@ type TimesheetCommand struct {
 	DateFormat     string `long:"date-format" value-name:"<format>" description:"specify the date format (see <https://pkg.go.dev/time#pkg-constants>)" default:"2006-01-02"`
 	Enquote        bool   `long:"enquote" description:"add quotes around field values"`
 	FieldSeparator string `long:"field-separator" value-name:"<CSV separator (default ',')>" default:","`
+	DurationFormat string `long:"duration-format" option:"golang" option:"colon-delimited" default:"golang"`
 }
 
 // Execute executes the timesheet command.
@@ -161,6 +163,27 @@ func (command *TimesheetCommand) Execute(args []string) error {
 			}
 		}
 
+		stringifyTimestamp := func(ts model.Timestamp) string {
+			return ts.ToString()
+		}
+
+		stringifyDuration := func(dur time.Duration) string {
+			switch command.DurationFormat {
+			case "golang":
+				str := dur.String()
+				if strings.HasSuffix(str, "m0s") {
+					str = strings.TrimSuffix(str, "0s")
+				}
+				return str
+			case "colon-delimited":
+				durHours := dur.Truncate(time.Hour)
+				durMins := (dur - durHours)
+				return fmt.Sprintf("%d:%02d", int(durHours.Hours()), int(durMins.Minutes()))
+			default:
+				panic("unhandled case '" + command.DurationFormat + "'")
+			}
+		}
+
 		fmt.Println(
 			strings.Join(
 				[]string{
@@ -176,16 +199,12 @@ func (command *TimesheetCommand) Execute(args []string) error {
 }
 
 // asCSVString returns this TimesheetEntry in CSV format.
-func asCSVString(e model.TimesheetEntry, processFieldString func(string) string, separator string) string {
-	dur := e.BreakDuration.String()
-	if strings.HasSuffix(dur, "m0s") {
-		dur = strings.TrimSuffix(dur, "0s")
-	}
+func asCSVString(e model.TimesheetEntry, processFieldString func(string) string, stringifyTimestamp func(model.Timestamp) string, stringifyDuration func(time.Duration) string, separator string) string {
 	return strings.Join(
 		[]string{
-			processFieldString(e.Start.ToString()),
-			processFieldString(dur),
-			processFieldString(e.End.ToString()),
+			processFieldString(stringifyTimestamp(e.Start)),
+			processFieldString(stringifyDuration(e.BreakDuration)),
+			processFieldString(stringifyTimestamp(e.End)),
 		},
 		separator,
 	)