add real dumb SIP server

internal/module/sip-server.go

@@ -0,0 +1,90 @@
+package module
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log/slog"
+	"time"
+
+	"github.com/emiago/diago"
+	"github.com/emiago/sipgo"
+	"github.com/emiago/sipgo/sip"
+	"github.com/jwetzell/showbridge-go/internal/config"
+	"github.com/jwetzell/showbridge-go/internal/route"
+)
+
+type SIPServer struct {
+	config config.ModuleConfig
+	ctx    context.Context
+	router route.RouteIO
+}
+
+func init() {
+	RegisterModule(ModuleRegistration{
+		Type: "net.sip.server",
+		New: func(ctx context.Context, config config.ModuleConfig, router route.RouteIO) (Module, error) {
+
+			return &SIPServer{config: config, ctx: ctx, router: router}, nil
+		},
+	})
+}
+
+func (ss *SIPServer) Id() string {
+	return ss.config.Id
+}
+
+func (ss *SIPServer) Type() string {
+	return ss.config.Type
+}
+
+func (ss *SIPServer) Run() error {
+
+	ua, _ := sipgo.NewUA()
+
+	diagoLogger := slog.New(slog.NewJSONHandler(io.Discard, nil))
+	sip.SetDefaultLogger(diagoLogger)
+	tu := diago.NewDiago(ua, diago.WithLogger(diagoLogger), diago.WithTransport(
+		diago.Transport{
+			Transport: "udp",
+			BindHost:  "0.0.0.0",
+			BindPort:  5060,
+		},
+	))
+
+	err := tu.Serve(ss.ctx, func(inDialog *diago.DialogServerSession) {
+		ss.HandleCall(inDialog)
+	})
+
+	if err != nil {
+		return err
+	}
+
+	<-ss.ctx.Done()
+	slog.Debug("router context done in module", "id", ss.Id())
+	return nil
+}
+
+func (ss *SIPServer) HandleCall(inDialog *diago.DialogServerSession) error {
+	inDialog.Trying()
+	inDialog.Ringing()
+	inDialog.Answer()
+
+	reader := inDialog.AudioReaderDTMF()
+	userString := ""
+	return reader.Listen(func(dtmf rune) error {
+		if dtmf == '#' {
+			if ss.router != nil {
+				ss.router.HandleInput(ss.Id(), userString)
+			}
+			userString = ""
+		} else {
+			userString += string(dtmf)
+		}
+		return nil
+	}, 5*time.Second)
+}
+
+func (ss *SIPServer) Output(payload any) error {
+	return fmt.Errorf("net.sip.server output is not implemented")
+}