add basic http server

http-server.go

@@ -0,0 +1,107 @@
+package showbridge
+
+import (
+	"encoding/json"
+	"fmt"
+	"log/slog"
+	"net/http"
+)
+
+type HTTPServer struct {
+	config ModuleConfig
+	Port   uint16
+	router *Router
+}
+
+type ResponseData struct {
+	Message string `json:"message"`
+	Status  string `json:"status"`
+}
+
+func init() {
+	RegisterModule(ModuleRegistration{
+		Type: "net.http.server",
+		New: func(config ModuleConfig) (Module, error) {
+			params := config.Params
+			port, ok := params["port"]
+			if !ok {
+				return nil, fmt.Errorf("net.http.server requires a port parameter")
+			}
+
+			portNum, ok := port.(float64)
+
+			if !ok {
+				return nil, fmt.Errorf("net.http.server port must be uint16")
+			}
+
+			return &HTTPServer{Port: uint16(portNum), config: config}, nil
+		},
+	})
+}
+
+func (hs *HTTPServer) Id() string {
+	return hs.config.Id
+}
+
+func (hs *HTTPServer) Type() string {
+	return hs.config.Type
+}
+
+func (hs *HTTPServer) RegisterRouter(router *Router) {
+	hs.router = router
+}
+
+func (hs *HTTPServer) HandleDefault(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+
+	response := ResponseData{
+		Message: "routing successful",
+		Status:  "ok",
+	}
+
+	if hs.router != nil {
+		routingErrors := hs.router.HandleInput(hs.config.Id, r)
+		if routingErrors != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			response.Status = "error"
+			response.Message = "routing failed"
+		} else {
+			w.WriteHeader(http.StatusOK)
+			response.Message = "routing successful"
+		}
+	} else {
+		w.WriteHeader(http.StatusInternalServerError)
+		response.Message = "no router registered"
+		response.Status = "error"
+	}
+
+	json.NewEncoder(w).Encode(response)
+}
+
+func (hs *HTTPServer) Run() error {
+	http.HandleFunc("/", hs.HandleDefault)
+
+	httpServer := &http.Server{
+		Addr:    fmt.Sprintf(":%d", hs.Port),
+		Handler: http.DefaultServeMux,
+	}
+
+	go func() {
+		<-hs.router.Context.Done()
+		slog.Debug("router context done in module", "id", hs.config.Id)
+		httpServer.Close()
+	}()
+
+	err := httpServer.ListenAndServe()
+	slog.Debug("net.http.server closed", "id", hs.config.Id)
+	if err != nil {
+		return err
+	}
+
+	<-hs.router.Context.Done()
+	return nil
+}
+
+func (hs *HTTPServer) Output(payload any) error {
+	return fmt.Errorf("net.http.server output is not implemented")
+}