NEXUS-1: Initial commit of Nexus

internal/handler/response.go

@@ -0,0 +1,23 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// respondJSON writes a JSON response with the given status code.
+func respondJSON(w http.ResponseWriter, status int, data any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	if data != nil {
+		if err := json.NewEncoder(w).Encode(data); err != nil {
+			http.Error(w, `{"error":"failed to encode response"}`, http.StatusInternalServerError)
+		}
+	}
+}
+
+// respondError writes a JSON error response.
+func respondError(w http.ResponseWriter, status int, message string) {
+	respondJSON(w, status, map[string]string{"error": message})
+}
+