Add excel export

internal/excel/excel.go

@@ -0,0 +1,61 @@
+package excel
+
+import (
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/xuri/excelize/v2"
+
+	"ronnyfriedland/timetracker/v2/internal/logic"
+)
+
+var SheetName = time.Now().Format("2006")
+var Headers = []string{"Date", "From", "To", "Duration"}
+
+const dateLayout = "02.01.2006"
+const timeLayout = "15:04:05"
+
+func Export(configPath *string, duration logic.Duration) string {
+	archiveDataFile := *configPath + "/timetracker.xlsx"
+
+	file, err := excelize.OpenFile(archiveDataFile)
+	if err != nil {
+		file = excelize.NewFile()
+	}
+	defer func() {
+        err := file.Close()
+        if err != nil {
+            log.Fatal(err)
+        }
+    }()
+
+	_, err = file.NewSheet(SheetName)
+	if err != nil {
+		log.Fatalf("Failed to ensure sheet created: %v", err)
+	}
+	file.DeleteSheet("Sheet1")
+
+	for i, header := range Headers {
+		   file.SetCellValue(SheetName, fmt.Sprintf("%s%d", string(rune(65+i)), 1), header)
+	}
+
+	rows, err := file.GetRows(SheetName)
+	if err != nil {
+		log.Fatalf("Failed to get rows from sheet: %v", err)
+	}
+
+	next := len(rows) + 1
+
+	file.SetCellValue(SheetName, fmt.Sprintf("A%d", next), duration.Date.Format(dateLayout))
+	file.SetCellValue(SheetName, fmt.Sprintf("B%d", next), duration.StartTime.Format(timeLayout))
+	file.SetCellValue(SheetName, fmt.Sprintf("C%d", next), duration.EndTime.Format(timeLayout))
+	file.SetCellValue(SheetName, fmt.Sprintf("D%d", next), fmt.Sprintf("%2.2f", duration.Duration.Hours()))
+
+	if err := file.SaveAs(archiveDataFile);
+	err != nil {
+		log.Fatal(err)
+	}
+
+	return archiveDataFile
+}