init cli (#3)

cmd/placekey/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/ringsaturn/pk"
+)
+
+const FromGeoFlag = "FromGeo"
+const ToGeoFlag = "ToGeo"
+
+func showErr() {
+	fmt.Printf("expected '%v' or '%v' subcommands\n", FromGeoFlag, ToGeoFlag)
+	os.Exit(1)
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		showErr()
+		return
+	}
+
+	switch os.Args[1] {
+	case FromGeoFlag:
+		FromGeoCmd := flag.NewFlagSet(FromGeoFlag, flag.ExitOnError)
+		lat := FromGeoCmd.Float64("lat", 0, "latitude")
+		long := FromGeoCmd.Float64("long", 0, "longitude")
+		if err := FromGeoCmd.Parse(os.Args[2:]); err != nil {
+			panic(err)
+		}
+		placeKey, err := pk.GeoToPlacekey(*lat, *long)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(placeKey)
+	case ToGeoFlag:
+		ToGeoCmd := flag.NewFlagSet(ToGeoFlag, flag.ExitOnError)
+		placekey := ToGeoCmd.String("pk", "", "the place key need to convert to geo")
+		if err := ToGeoCmd.Parse(os.Args[2:]); err != nil {
+			panic(err)
+		}
+		lat, long, err := pk.PlacekeyToGeo(*placekey)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(lat, long)
+	default:
+		showErr()
+	}
+}