first commit

backend/internal/pkg/googleapi/status.go

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+// Package googleapi provides helpers for Google-style API responses.
+package googleapi
+
+import "net/http"
+
+// HTTPStatusToGoogleStatus maps HTTP status codes to Google-style error status strings.
+func HTTPStatusToGoogleStatus(status int) string {
+	switch status {
+	case http.StatusBadRequest:
+		return "INVALID_ARGUMENT"
+	case http.StatusUnauthorized:
+		return "UNAUTHENTICATED"
+	case http.StatusForbidden:
+		return "PERMISSION_DENIED"
+	case http.StatusNotFound:
+		return "NOT_FOUND"
+	case http.StatusTooManyRequests:
+		return "RESOURCE_EXHAUSTED"
+	default:
+		if status >= 500 {
+			return "INTERNAL"
+		}
+		return "UNKNOWN"
+	}
+}