add udp-client

config.json

@@ -1,7 +1,7 @@
 {
   "modules": [
     {
-      "id": "tcp1",
+      "id": "tcp",
       "type": "net.tcp.server",
       "params": {
         "port": 8000,
@@ -9,18 +9,18 @@
       }
     },
     {
-      "id": "tcp2",
+      "id": "udp",
-      "type": "net.tcp.server",
+      "type": "net.udp.client",
       "params": {
-        "port": 8001,
+        "host": "127.0.0.1",
-        "framing": "LF"
+        "port": 8888
       }
     }
   ],
   "routes": [
     {
-      "input": "tcp1",
+      "input": "tcp",
-      "output": "tcp2"
+      "output": "udp"
     }
   ]
 }

udp-client.go

@@ -0,0 +1,85 @@
+package showbridge
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net"
+)
+
+type UDPClient struct {
+	config ModuleConfig
+	Host   string
+	Port   uint16
+	conn   net.Conn
+	router *Router
+}
+
+func init() {
+	RegisterModule(ModuleRegistration{
+		Type: "net.udp.client",
+		New: func(config ModuleConfig) (Module, error) {
+			params := config.Params
+			host, ok := params["host"]
+
+			if !ok {
+				return nil, fmt.Errorf("udp client requires a host parameter")
+			}
+
+			hostString, ok := host.(string)
+
+			if !ok {
+				return nil, fmt.Errorf("udp client host must be uint16")
+			}
+
+			port, ok := params["port"]
+			if !ok {
+				return nil, fmt.Errorf("udp client requires a port parameter")
+			}
+
+			portNum, ok := port.(float64)
+
+			if !ok {
+				return nil, fmt.Errorf("udp client port must be uint16")
+			}
+
+			return &UDPClient{Host: hostString, Port: uint16(portNum), config: config}, nil
+		},
+	})
+}
+
+func (uc *UDPClient) Id() string {
+	return uc.config.Id
+}
+
+func (uc *UDPClient) Type() string {
+	return uc.config.Type
+}
+
+func (uc *UDPClient) RegisterRouter(router *Router) {
+	slog.Debug("registering router", "id", uc.config.Id)
+	uc.router = router
+}
+
+func (uc *UDPClient) Run(ctx context.Context) error {
+	client, err := net.Dial("udp", fmt.Sprintf(":%d", uc.Port))
+	if err != nil {
+		return err
+	}
+
+	uc.conn = client
+	<-ctx.Done()
+	return nil
+}
+
+func (uc *UDPClient) Output(payload any) error {
+	if uc.conn != nil {
+		payloadBytes, ok := payload.([]byte)
+		if !ok {
+			return fmt.Errorf("udp-client is only able to output bytes")
+		}
+		_, err := uc.conn.Write(payloadBytes)
+		return err
+	}
+	return nil
+}