basic frame shipping, but bug in ncurses init/exit

cmd/client.go

@@ -3,6 +3,7 @@ package cmd // code.bitsetter.de/fun/gosl/cmd
 import (
 	"encoding/gob"
 	"fmt"
+	"log"
 	"net"
 	"os"
 	"strconv"
@@ -20,17 +21,27 @@ var cmdClient = &cobra.Command{
 }
 
 var (
-	ServerHost string
+	ServerHost  string
+	renderQueue = make(chan data.Frame)
 )
 
 func register(con net.Conn, id int) error {
-	w, h := data.TestNC()
+	w, h := 0, 0               //data.TestNC()
 	enc := gob.NewEncoder(con) // Encoder
 	err := enc.Encode(handshake{ID: id, H: h, W: w})
 	return err
 }
 
+func render() {
+	var f data.Frame
+	for f = range renderQueue {
+		data.RenderFrame(&f)
+	}
+}
+
 func runClient(cmd *cobra.Command, args []string) {
+	data.InitNC()
+	defer data.ExitNC()
 	fmt.Println("running client ...")
 
 	if len(args) < 1 {
@@ -43,8 +54,21 @@ func runClient(cmd *cobra.Command, args []string) {
 	if err != nil {
 		fmt.Println("connect error:", err)
 	}
-
+	defer con.Close()
 	register(con, id)
+
+	go render()
+	for {
+		var oFrame data.Frame
+		// always use new decoder - reusing may lead to errors
+		gd := gob.NewDecoder(con)
+		err = gd.Decode(&oFrame)
+		if err != nil {
+			log.Fatal("RGS:", err)
+		}
+		renderQueue <- oFrame
+	}
+
 }
 
 func init() {

cmd/server.go

@@ -8,6 +8,8 @@ import (
 	"time"
 
 	"github.com/spf13/cobra"
+
+	"code.bitsetter.de/fun/gosl/data"
 )
 
 var cmdServer = &cobra.Command{
@@ -51,11 +53,23 @@ func handleConn(conn *net.TCPConn) {
 }
 
 func serveClients() {
+	var oFrame = data.Frame{
+		1, 10,
+		[][]rune{
+			[]rune("hallo"),
+			[]rune("das"),
+			[]rune("ist"),
+			[]rune("einTest"),
+		},
+	}
 	for { // while true
 		for _, k := range clientKeys {
 			id, client := k, clients[k]
 			if id > 0 {
+				enc := gob.NewEncoder(client.con)
+				enc.Encode(oFrame)
 				log.Println("ID:", id, "Client:", client)
+
 			}
 		}
 		time.Sleep(time.Second)

data/frame.go

@@ -0,0 +1,6 @@
+package data // code.bitsetter.de/fun/gosl/data
+
+type Frame struct {
+	W, H int
+	Data [][]rune
+}

data/screen.go

@@ -8,9 +8,31 @@ import (
 	nc "github.com/rthornton128/goncurses"
 )
 
-type Screen struct {
-	w, h int
-	data []rune
+var (
+	win *nc.Window
+)
+
+func RenderFrame(f *Frame) {
+	win.Clear()
+	for k, _ := range f.Data {
+		win.MovePrint(k+1, 1, string(f.Data[k]))
+	}
+}
+
+func InitNC() {
+	var err error
+	win, err = nc.Init()
+	if err != nil {
+		log.Fatal(err)
+		os.Exit(1)
+	}
+}
+
+func ExitNC() {
+	//if win != nil {
+
+	//	}
+	nc.End()
 }
 
 func TestNC() (int, int) {