Function handleNetworkError

Source

export function handleNetworkError(error: unknown): AppError {
  console.warn("[ErrorHandling] ⚠️ Handling network error:", error);

  // Handle fetch errors and timeouts
  if (
    error instanceof TypeError &&
    (error.message.includes("fetch") || error.message.includes("network"))
  ) {
    return createError(
      ErrorType.NETWORK,
      "Unable to connect to the server. Please check your internet connection.",
      error,
      "NETWORK_UNAVAILABLE",
      ErrorRecoveryAction.CHECK_CONNECTION,
      "Please check your internet connection and try again.",
    );
  }

  // Handle API responses with error status codes
  if (
    error instanceof Response ||
    (typeof error === "object" && error !== null && "status" in error)
  ) {
    const response = error as
      | Response
      | { status: number; statusText?: string };
    const status = response.status;
    const message = "An error occurred while communicating with the server.";
    const code = "API_ERROR";

    if (status === 401 || status === 403) {
      return createError(
        ErrorType.AUTH,
        "Authentication failed. Please log in again.",
        error,
        "AUTH_FAILED",
        ErrorRecoveryAction.REFRESH_TOKEN,
        "Your session has expired. Please log in again.",
      );
    }

    if (status === 404) {
      return createError(
        ErrorType.SERVER,
        "The requested resource was not found.",
        error,
        "NOT_FOUND",
        ErrorRecoveryAction.NONE,
        "The requested resource was not found.",
      );
    }

    if (status === 429) {
      return createError(
        ErrorType.SERVER,
        "API rate limit exceeded. Please wait before trying again.",
        error,
        "RATE_LIMITED",
        ErrorRecoveryAction.WAIT_RATE_LIMIT,
        "Too many requests. Please wait a moment before retrying.",
      );
    }

    if (status >= 500) {
      return createError(
        ErrorType.SERVER,
        "The server encountered an error. Please try again in a few moments.",
        error,
        "SERVER_ERROR",
        ErrorRecoveryAction.RETRY,
        "The server encountered an error. Please try again in a few moments.",
      );
    }

    return createError(ErrorType.SERVER, message, error, code);
  }

  // For timeout errors
  if (error instanceof Error && error.name === "TimeoutError") {
    return createError(
      ErrorType.NETWORK,
      "The request timed out. Please try again.",
      error,
      "TIMEOUT",
      ErrorRecoveryAction.RETRY,
      "The request timed out. Please try again.",
    );
  }

  // For any other unknown errors
  return createError(
    ErrorType.UNKNOWN,
    "An unexpected error occurred.",
    error,
    "UNKNOWN_ERROR",
  );
}
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