added tests, add support for duration diff+add

cmd/writer.go

@@ -0,0 +1,94 @@
+/*
+Copyright © 2025 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package cmd
+
+import (
+	"fmt"
+	"time"
+)
+
+type TimestampWriter interface {
+	String() string
+}
+
+type TPduration struct {
+	TimestampProccessor
+	Data time.Duration
+}
+
+type TPdatetime struct {
+	TimestampProccessor
+	Data time.Time
+}
+
+func (duration TPduration) String() string {
+	var unit string
+
+	if duration.Unit {
+		switch duration.Format {
+		case "d", "day", "days":
+			unit = " days"
+		case "h", "hour", "hours":
+			unit = " hours"
+		case "m", "min", "mins", "minutes":
+			unit = " minutes"
+		case "s", "sec", "secs", "seconds":
+			unit = " seconds"
+		case "ms", "msec", "msecs", "milliseconds":
+			unit = " milliseconds"
+		}
+	}
+
+	// duration, days, hour, min, sec, msec
+	switch duration.Format {
+	case "d", "day", "days":
+		return fmt.Sprintf("%.02f%s", duration.Data.Hours()/24+(duration.Data.Minutes()/60), unit)
+	case "h", "hour", "hours":
+		return fmt.Sprintf("%.02f%s", duration.Data.Hours(), unit)
+	case "m", "min", "mins", "minutes":
+		return fmt.Sprintf("%.02f%s", duration.Data.Minutes(), unit)
+	case "s", "sec", "secs", "seconds":
+		return fmt.Sprintf("%.02f%s", duration.Data.Seconds(), unit)
+	case "ms", "msec", "msecs", "milliseconds":
+		return fmt.Sprintf("%d%s", duration.Data.Milliseconds(), unit)
+	case "dur", "duration":
+		fallthrough
+	default:
+		return duration.Data.String()
+	}
+}
+
+func (datetime TPdatetime) String() string {
+	// datetime(default), date, time, unix, string
+	switch datetime.Format {
+	case "rfc3339":
+		return datetime.Data.Format(time.RFC3339)
+	case "date":
+		return datetime.Data.Format("2006-01-02")
+	case "time":
+		return datetime.Data.Format("03:04:05")
+	case "unix":
+		return fmt.Sprintf("%d", datetime.Data.Unix())
+	case "datetime":
+		fallthrough
+	case "":
+		return datetime.Data.String()
+	default:
+		return datetime.Data.Format(datetime.Format)
+	}
+}