Added a simple tool to between times and IDs.

idtool/idtool.go

@@ -0,0 +1,45 @@
+package main
+
+import id "github.com/koofr/go-idutils"
+import "flag"
+import "time"
+import "fmt"
+
+func main() {
+	srcId := flag.Int64("id", 0, "Convert ID to timestamp")
+	srcEpoch := flag.Int64("unix", 0, "Convert a Unix timestamp to ID")
+	srcTime := flag.String("time", "", "Convert time to ID (allows for various common formats)")
+	flag.Parse()
+
+	if srcId != nil && *srcId > 0 {
+		tiem := id.IdToTime(*srcId)
+		fmt.Printf("%s\n", tiem.Format(time.RFC822))
+	}
+
+	if srcEpoch != nil && *srcEpoch > 0 {
+		fmt.Printf("%d\n", id.IdEndOfTimestamp(*srcEpoch*1000))
+	}
+
+	if srcTime != nil && *srcTime != "" {
+		formats := []string{
+			time.ANSIC,
+			time.UnixDate,
+			time.RubyDate,
+			time.RFC822,
+			time.RFC822Z,
+			time.RFC850,
+			time.RFC1123,
+			time.RFC1123Z,
+			time.RFC3339,
+			time.RFC3339Nano,
+		}
+		for _, f := range formats {
+			t, err := time.Parse(f, *srcTime)
+			if err == nil {
+				fmt.Printf("%d\n", id.IdEndOfTime(t))
+				break
+			}
+		}
+	}
+
+}