add config reloading via API endpoint and more WS work

api.go

@@ -1,46 +1,145 @@
 package showbridge
 
 import (
+	"context"
 	"embed"
 	_ "embed"
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"time"
+
+	"github.com/jwetzell/showbridge-go/internal/config"
+	"github.com/jwetzell/showbridge-go/internal/module"
+	"github.com/jwetzell/showbridge-go/internal/route"
 )
 
+func (r *Router) startAPIServer(config config.ApiConfig) {
+	r.logger.Debug("starting API server", "port", config.Port)
+	mux := http.NewServeMux()
+	mux.HandleFunc("/ws", r.handleWebsocket)
+	mux.HandleFunc("/health", r.handleHealthHTTP)
+	mux.HandleFunc("/schema/{schema}", r.handleSchemaHTTP)
+	mux.HandleFunc("/api/v1/config", r.handleConfigHTTP)
+
+	r.apiServerMu.Lock()
+	defer r.apiServerMu.Unlock()
+	r.apiServer = &http.Server{
+		Addr:    fmt.Sprintf(":%d", config.Port),
+		Handler: mux,
+	}
+
+	go func() {
+		r.apiServer.ListenAndServe()
+		r.apiServerShutdown()
+	}()
+}
+
+func (r *Router) stopAPIServer() {
+	r.logger.Debug("stopping API server")
+	r.apiServerMu.Lock()
+	defer r.apiServerMu.Unlock()
+	if r.apiServer != nil {
+		apiShutdownCtx, apiShutdownCancel := context.WithTimeout(context.Background(), 5*time.Second)
+		r.apiServerShutdown = apiShutdownCancel
+		r.apiServer.Shutdown(apiShutdownCtx)
+		<-apiShutdownCtx.Done()
+		r.apiServer = nil
+	}
+}
+
+func (r *Router) handleHealthHTTP(w http.ResponseWriter, req *http.Request) {
+	switch req.Method {
+	case http.MethodGet:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.WriteHeader(http.StatusOK)
+	case http.MethodOptions:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+		w.WriteHeader(http.StatusOK)
+	default:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.WriteHeader(http.StatusMethodNotAllowed)
+	}
+}
+
 func (r *Router) handleConfigHTTP(w http.ResponseWriter, req *http.Request) {
-	if req.Method != http.MethodGet {
-		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
-		return
+
+	switch req.Method {
+	case http.MethodGet:
+		configJSON, err := json.Marshal(r.runningConfig)
+		if err != nil {
+			http.Error(w, "Internal server error", http.StatusInternalServerError)
+			return
+		}
+
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Content-Type", "application/json")
+		w.Write(configJSON)
+	case http.MethodPut:
+		var newConfig config.Config
+		err := json.NewDecoder(req.Body).Decode(&newConfig)
+		if err != nil {
+			http.Error(w, "Bad request", http.StatusBadRequest)
+			return
+		}
+		moduleErrors, routeErrors := r.UpdateConfig(newConfig)
+		if len(moduleErrors) > 0 || len(routeErrors) > 0 {
+			errorResponse := struct {
+				ModuleErrors []module.ModuleError `json:"moduleErrors,omitempty"`
+				RouteErrors  []route.RouteError   `json:"routeErrors,omitempty"`
+			}{
+				ModuleErrors: moduleErrors,
+				RouteErrors:  routeErrors,
+			}
+			errorResponseJSON, err := json.Marshal(errorResponse)
+			if err != nil {
+				http.Error(w, "Internal server error", http.StatusInternalServerError)
+				return
+			}
+			w.Header().Set("Access-Control-Allow-Origin", "*")
+			w.Header().Set("Content-Type", "application/json")
+			w.WriteHeader(http.StatusBadRequest)
+			w.Write(errorResponseJSON)
+			return
+		}
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.WriteHeader(http.StatusOK)
+	case http.MethodOptions:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, PUT, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+		w.WriteHeader(http.StatusOK)
+	default:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.WriteHeader(http.StatusMethodNotAllowed)
 	}
 
-	configJSON, err := json.Marshal(r.runningConfig)
-	if err != nil {
-		http.Error(w, "Internal server error", http.StatusInternalServerError)
-		return
-	}
-
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Content-Type", "application/json")
-	w.Write(configJSON)
 }
 
 //go:embed schema
 var schema embed.FS
 
 func (r *Router) handleSchemaHTTP(w http.ResponseWriter, req *http.Request) {
-	if req.Method != http.MethodGet {
-		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
-		return
+	switch req.Method {
+	case http.MethodGet:
+		schemaName := req.PathValue("schema")
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Content-Type", "application/json")
+		configSchema, err := schema.ReadFile(fmt.Sprintf("schema/%s.schema.json", schemaName))
+		if err != nil {
+			http.Error(w, "Internal server error", http.StatusInternalServerError)
+			return
+		}
+		w.Write(configSchema)
+	case http.MethodOptions:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+		w.WriteHeader(http.StatusOK)
+	default:
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.WriteHeader(http.StatusMethodNotAllowed)
 	}
-
-	schemaName := req.PathValue("schema")
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Content-Type", "application/json")
-	configSchema, err := schema.ReadFile(fmt.Sprintf("schema/%s.schema.json", schemaName))
-	if err != nil {
-		http.Error(w, "Internal server error", http.StatusInternalServerError)
-		return
-	}
-	w.Write(configSchema)
 }