read-excel-file/modules/xlsx/file/InvalidInputError.js

Read `.xlsx` files in a web browser or in Node.js

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// This code was originally submitted by Etienne Prothon.
// https://gitlab.com/catamphetamine/read-excel-file/-/merge_requests/11

// An error thrown when the input passed to `readXlsxFile()` is not a valid `.xlsx` file.
//
// Carries a documented, stable `code` property that consumers can reliably
// branch on — same convention as the schema-parsing `InvalidError` class
// (`error.code`) — instead of string-matching a low-level error message
// leaked from a transitive dependency (Hyrum's law).
//
// The `name` property is set so that the error type can also be detected via
// `error.name === 'InvalidInputError'` in setups where `instanceof` is unreliable
// (e.g. when both the ES-module and the CommonJS builds of this package end up
// being loaded in the same application).

var MESSAGES = {
  XLS_FILE_NOT_SUPPORTED: 'You passed a legacy `.xls` file. Only `.xlsx` files are supported',
  FILE_NOT_SUPPORTED: 'Doesn\'t look like an `.xlsx` file',
  INVALID_ZIP: 'Couldn\'t unzip `.xlsx` file contents',
  NO_DATA: 'No data'
};

// `.xlsx` files are just ZIP archives, so every valid `.xlsx` file starts with a
// ZIP local file header signature "PK" (`0x50 0x4B`). When the input isn't a ZIP
// archive, a 3rd-party unzipper library throws an obscure low-level error
// (for example `"invalid signature: 0xe011cfd0"` — the four leading bytes of a
// binary `.xls` file read in little-endian).
// That gives the caller nothing stable to branch on, and the exact wording can change
// depending on the 3rd-party unzipper library being used.
// This error standardizes the handling of cases when an invalid file is passed.
var InvalidInputError = /*#__PURE__*/function (_Error) {
  _inherits(InvalidInputError, _Error);
  var _super = _createSuper(InvalidInputError);
  /**
   * Creates an `InvalidInputError` instance.
   * @param {string} code
   * @param {any} [cause]
   */
  function InvalidInputError(code, cause) {
    var _this;
    _classCallCheck(this, InvalidInputError);
    _this = _super.call(this, MESSAGES[code] || code);

    // Set `code` property.
    _this.code = code;

    // Set `name` property.
    //
    // This error could be detected either by `instanceof InvalidInputError`
    // or by comparing its `name` property value to "InvalidInputError".
    // Why use the `name` comparison when `instanceof` operator is available?
    // Google AI tells that it does make sense in the cases when an error is
    // "serialized" and then "deserialized" in a "distributed" environment such as
    // throwing an error in a worker thread and then handling it in a main thread,
    // or when throwing it in one "microservice" and then catching it in another one,
    // or just logging as in `sentry.io`. And in those cases, `error.constructor.name`
    // isn't always available for same reason of "serializing" and then "deserializing".
    //
    // For example, even if `InvalidInputError` is a named export of this package,
    // when later bunding the application code with a bundler it will still be minified and renamed.
    // That's when the `name` property could be used to find out the actual type of the error
    // in case it gets thrown and reported to a remote system like `sentry.io`.
    //
    // By the way, core Node.js errors themselves have a `name` property.
    //
    _this.name = 'InvalidInputError';

    // Set `cause` property.
    //
    // `Error.prototype.cause` property indicates the specific, original reason
    // a given error occurred. Standardized in ES2022, it allows you to chain errors
    // by catching a low-level exception and re-throwing a meaningful, high-level error
    // without wiping out the diagnostic context or stack trace of the original failure.
    //
    // Adding a `.cause` property mimics modern error chaining for environments that support it
    // while remaining completely harmless in older systems.
    //
    _this.cause = cause;
    return _this;
  }
  return _createClass(InvalidInputError);
}( /*#__PURE__*/_wrapNativeSuper(Error));
export { InvalidInputError as default };
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