Initial AI service skeleton

internal/httpapi/helpers.go

@@ -0,0 +1,22 @@
+package httpapi
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"time"
+)
+
+func contextWithTimeout(r *http.Request, timeout time.Duration) (context.Context, context.CancelFunc) {
+	return context.WithTimeout(r.Context(), timeout)
+}
+
+func writeJSON(w http.ResponseWriter, status int, payload any) {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(payload)
+}
+
+func writeError(w http.ResponseWriter, status int, message string) {
+	writeJSON(w, status, map[string]string{"error": message})
+}