add sip module that emits on every call

internal/module/sip-call-server.go

@@ -0,0 +1,129 @@
+package module
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log/slog"
+
+	"github.com/emiago/diago"
+	"github.com/emiago/diago/media"
+	"github.com/emiago/sipgo"
+	"github.com/emiago/sipgo/sip"
+	"github.com/jwetzell/showbridge-go/internal/config"
+	"github.com/jwetzell/showbridge-go/internal/route"
+)
+
+type SIPCallServer struct {
+	config    config.ModuleConfig
+	ctx       context.Context
+	router    route.RouteIO
+	IP        string
+	Port      int
+	Transport string
+}
+
+type SIPCallMessage struct {
+	To string
+}
+
+func init() {
+	RegisterModule(ModuleRegistration{
+		Type: "sip.call.server",
+		New: func(ctx context.Context, config config.ModuleConfig, router route.RouteIO) (Module, error) {
+			params := config.Params
+			portNum := 5060
+
+			port, ok := params["port"]
+			if ok {
+				specificPortNum, ok := port.(float64)
+
+				if !ok {
+					return nil, fmt.Errorf("sip.call.server port must be a number")
+				}
+				portNum = int(specificPortNum)
+			}
+
+			ipString := "0.0.0.0"
+
+			ip, ok := params["ip"]
+			if ok {
+
+				specificIpString, ok := ip.(string)
+
+				if !ok {
+					return nil, fmt.Errorf("sip.call.server ip must be a string")
+				}
+				ipString = specificIpString
+			}
+
+			transportString := "udp"
+
+			transport, ok := params["transport"]
+			if ok {
+
+				specificTransportString, ok := transport.(string)
+
+				if !ok {
+					return nil, fmt.Errorf("sip.call.server transport must be a string")
+				}
+				transportString = specificTransportString
+			}
+			return &SIPCallServer{config: config, ctx: ctx, router: router, IP: ipString, Port: int(portNum), Transport: transportString}, nil
+		},
+	})
+}
+
+func (sds *SIPCallServer) Id() string {
+	return sds.config.Id
+}
+
+func (sds *SIPCallServer) Type() string {
+	return sds.config.Type
+}
+
+func (sds *SIPCallServer) Run() error {
+	diagoLogger := slog.New(slog.NewJSONHandler(io.Discard, nil))
+
+	ua, _ := sipgo.NewUA(
+		sipgo.WithUserAgentTransportLayerOptions(sip.WithTransportLayerLogger(diagoLogger)),
+		sipgo.WithUserAgentTransactionLayerOptions(sip.WithTransactionLayerLogger(diagoLogger)),
+	)
+	defer ua.Close()
+
+	sip.SetDefaultLogger(diagoLogger)
+	media.SetDefaultLogger(diagoLogger)
+	dg := diago.NewDiago(ua, diago.WithLogger(diagoLogger), diago.WithTransport(
+		diago.Transport{
+			Transport: sds.Transport,
+			BindHost:  sds.IP,
+			BindPort:  sds.Port,
+		},
+	))
+
+	err := dg.Serve(sds.ctx, func(inDialog *diago.DialogServerSession) {
+		sds.HandleCall(inDialog)
+	})
+
+	if err != nil {
+		return err
+	}
+
+	<-sds.ctx.Done()
+	slog.Debug("router context done in module", "id", sds.Id())
+	return nil
+}
+
+func (sds *SIPCallServer) HandleCall(inDialog *diago.DialogServerSession) {
+	inDialog.Trying()
+	inDialog.Ringing()
+	inDialog.Answer()
+	sds.router.HandleInput(sds.Id(), SIPCallMessage{
+		To: inDialog.ToUser(),
+	})
+	<-inDialog.Context().Done()
+}
+
+func (sds *SIPCallServer) Output(payload any) error {
+	return fmt.Errorf("sip.call.server output is not implemented")
+}