errors.ts

// The whole point behind this internal module is to allow Node.js to no
// longer be forced to treat every error message change as a semver-major
// change. The NodeError classes here all expose a `code` property whose
// value statically and permanently identifies the error. While the error
// message may change, the code should not.

import * as assert from 'assert';
import * as util from 'util';

const kCode = typeof Symbol === 'undefined' ? '_kCode' : (Symbol as any)('code');
const messages = {}; // new Map();

function makeNodeError(Base) {
  return class NodeError extends Base {
    constructor(key, ...args) {
      super(message(key, args));
      this.code = key;
      this[kCode] = key;
      this.name = `${super.name} [${this[kCode]}]`;
    }
  };
}

class AssertionError extends global.Error {
  generatedMessage: any;
  name: any;
  code: any;
  actual: any;
  expected: any;
  operator: any;

  constructor(options) {
    if (typeof options !== 'object' || options === null) {
      throw new exports.TypeError('ERR_INVALID_ARG_TYPE', 'options', 'object');
    }
    if (options.message) {
      super(options.message);
    } else {
      super(
        `${util.inspect(options.actual).slice(0, 128)} ` +
          `${options.operator} ${util.inspect(options.expected).slice(0, 128)}`,
      );
    }

    this.generatedMessage = !options.message;
    this.name = 'AssertionError [ERR_ASSERTION]';
    this.code = 'ERR_ASSERTION';
    this.actual = options.actual;
    this.expected = options.expected;
    this.operator = options.operator;
    Error.captureStackTrace(this, options.stackStartFunction);
  }
}

function message(key, args) {
  assert.strictEqual(typeof key, 'string');
  // const msg = messages.get(key);
  const msg = messages[key];
  assert(msg, `An invalid error message key was used: ${key}.`);
  let fmt;
  if (typeof msg === 'function') {
    fmt = msg;
  } else {
    fmt = util.format;
    if (args === undefined || args.length === 0) return msg;
    args.unshift(msg);
  }
  return String(fmt.apply(null, args));
}

// Utility function for registering the error codes. Only used here. Exported
// *only* to allow for testing.
function E(sym, val) {
  messages[sym] = typeof val === 'function' ? val : String(val);
}

export const Error = makeNodeError(global.Error);
export const TypeError = makeNodeError(global.TypeError);
export const RangeError = makeNodeError(global.RangeError);

export {
  message,
  AssertionError,
  E, // This is exported only to facilitate testing.
};

// To declare an error message, use the E(sym, val) function above. The sym
// must be an upper case string. The val can be either a function or a string.
// The return value of the function must be a string.
// Examples:
// E('EXAMPLE_KEY1', 'This is the error value');
// E('EXAMPLE_KEY2', (a, b) => return `${a} ${b}`);
//
// Once an error code has been assigned, the code itself MUST NOT change and
// any given error code must never be reused to identify a different error.
//
// Any error code added here should also be added to the documentation
//
// Note: Please try to keep these in alphabetical order
E('ERR_ARG_NOT_ITERABLE', '%s must be iterable');
E('ERR_ASSERTION', '%s');
E('ERR_BUFFER_OUT_OF_BOUNDS', bufferOutOfBounds);
E('ERR_CHILD_CLOSED_BEFORE_REPLY', 'Child closed before reply received');
E('ERR_CONSOLE_WRITABLE_STREAM', 'Console expects a writable stream instance for %s');
E('ERR_CPU_USAGE', 'Unable to obtain cpu usage %s');
E('ERR_DNS_SET_SERVERS_FAILED', (err, servers) => `c-ares failed to set servers: "${err}" [${servers}]`);
E('ERR_FALSY_VALUE_REJECTION', 'Promise was rejected with falsy value');
E('ERR_ENCODING_NOT_SUPPORTED', enc => `The "${enc}" encoding is not supported`);
E('ERR_ENCODING_INVALID_ENCODED_DATA', enc => `The encoded data was not valid for encoding ${enc}`);
E('ERR_HTTP_HEADERS_SENT', 'Cannot render headers after they are sent to the client');
E('ERR_HTTP_INVALID_STATUS_CODE', 'Invalid status code: %s');
E('ERR_HTTP_TRAILER_INVALID', 'Trailers are invalid with this transfer encoding');
E('ERR_INDEX_OUT_OF_RANGE', 'Index out of range');
E('ERR_INVALID_ARG_TYPE', invalidArgType);
E('ERR_INVALID_ARRAY_LENGTH', (name, len, actual) => {
  assert.strictEqual(typeof actual, 'number');
  return `The array "${name}" (length ${actual}) must be of length ${len}.`;
});
E('ERR_INVALID_BUFFER_SIZE', 'Buffer size must be a multiple of %s');
E('ERR_INVALID_CALLBACK', 'Callback must be a function');
E('ERR_INVALID_CHAR', 'Invalid character in %s');
E('ERR_INVALID_CURSOR_POS', 'Cannot set cursor row without setting its column');
E('ERR_INVALID_FD', '"fd" must be a positive integer: %s');
E('ERR_INVALID_FILE_URL_HOST', 'File URL host must be "localhost" or empty on %s');
E('ERR_INVALID_FILE_URL_PATH', 'File URL path %s');
E('ERR_INVALID_HANDLE_TYPE', 'This handle type cannot be sent');
E('ERR_INVALID_IP_ADDRESS', 'Invalid IP address: %s');
E('ERR_INVALID_OPT_VALUE', (name, value) => {
  return `The value "${String(value)}" is invalid for option "${name}"`;
});
E('ERR_INVALID_OPT_VALUE_ENCODING', value => `The value "${String(value)}" is invalid for option "encoding"`);
E('ERR_INVALID_REPL_EVAL_CONFIG', 'Cannot specify both "breakEvalOnSigint" and "eval" for REPL');
E('ERR_INVALID_SYNC_FORK_INPUT', 'Asynchronous forks do not support Buffer, Uint8Array or string input: %s');
E('ERR_INVALID_THIS', 'Value of "this" must be of type %s');
E('ERR_INVALID_TUPLE', '%s must be an iterable %s tuple');
E('ERR_INVALID_URL', 'Invalid URL: %s');
E('ERR_INVALID_URL_SCHEME', expected => `The URL must be ${oneOf(expected, 'scheme')}`);
E('ERR_IPC_CHANNEL_CLOSED', 'Channel closed');
E('ERR_IPC_DISCONNECTED', 'IPC channel is already disconnected');
E('ERR_IPC_ONE_PIPE', 'Child process can have only one IPC pipe');
E('ERR_IPC_SYNC_FORK', 'IPC cannot be used with synchronous forks');
E('ERR_MISSING_ARGS', missingArgs);
E('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
E('ERR_NAPI_CONS_FUNCTION', 'Constructor must be a function');
E('ERR_NAPI_CONS_PROTOTYPE_OBJECT', 'Constructor.prototype must be an object');
E('ERR_NO_CRYPTO', 'Node.js is not compiled with OpenSSL crypto support');
E('ERR_NO_LONGER_SUPPORTED', '%s is no longer supported');
E('ERR_PARSE_HISTORY_DATA', 'Could not parse history data in %s');
E('ERR_SOCKET_ALREADY_BOUND', 'Socket is already bound');
E('ERR_SOCKET_BAD_PORT', 'Port should be > 0 and < 65536');
E('ERR_SOCKET_BAD_TYPE', 'Bad socket type specified. Valid types are: udp4, udp6');
E('ERR_SOCKET_CANNOT_SEND', 'Unable to send data');
E('ERR_SOCKET_CLOSED', 'Socket is closed');
E('ERR_SOCKET_DGRAM_NOT_RUNNING', 'Not running');
E('ERR_STDERR_CLOSE', 'process.stderr cannot be closed');
E('ERR_STDOUT_CLOSE', 'process.stdout cannot be closed');
E('ERR_STREAM_WRAP', 'Stream has StringDecoder set or is in objectMode');
E('ERR_TLS_CERT_ALTNAME_INVALID', "Hostname/IP does not match certificate's altnames: %s");
E('ERR_TLS_DH_PARAM_SIZE', size => `DH parameter size ${size} is less than 2048`);
E('ERR_TLS_HANDSHAKE_TIMEOUT', 'TLS handshake timeout');
E('ERR_TLS_RENEGOTIATION_FAILED', 'Failed to renegotiate');
E('ERR_TLS_REQUIRED_SERVER_NAME', '"servername" is required parameter for Server.addContext');
E('ERR_TLS_SESSION_ATTACK', 'TSL session renegotiation attack detected');
E('ERR_TRANSFORM_ALREADY_TRANSFORMING', 'Calling transform done when still transforming');
E('ERR_TRANSFORM_WITH_LENGTH_0', 'Calling transform done when writableState.length != 0');
E('ERR_UNKNOWN_ENCODING', 'Unknown encoding: %s');
E('ERR_UNKNOWN_SIGNAL', 'Unknown signal: %s');
E('ERR_UNKNOWN_STDIN_TYPE', 'Unknown stdin file type');
E('ERR_UNKNOWN_STREAM_TYPE', 'Unknown stream file type');
E('ERR_V8BREAKITERATOR', 'Full ICU data not installed. ' + 'See https://github.com/nodejs/node/wiki/Intl');

function invalidArgType(name, expected, actual) {
  assert(name, 'name is required');

  // determiner: 'must be' or 'must not be'
  let determiner;
  if (expected.includes('not ')) {
    determiner = 'must not be';
    expected = expected.split('not ')[1];
  } else {
    determiner = 'must be';
  }

  let msg;
  if (Array.isArray(name)) {
    const names = name.map(val => `"${val}"`).join(', ');
    msg = `The ${names} arguments ${determiner} ${oneOf(expected, 'type')}`;
  } else if (name.includes(' argument')) {
    // for the case like 'first argument'
    msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
  } else {
    const type = name.includes('.') ? 'property' : 'argument';
    msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
  }

  // if actual value received, output it
  if (arguments.length >= 3) {
    msg += `. Received type ${actual !== null ? typeof actual : 'null'}`;
  }
  return msg;
}

function missingArgs(...args) {
  assert(args.length > 0, 'At least one arg needs to be specified');
  let msg = 'The ';
  const len = args.length;
  args = args.map(a => `"${a}"`);
  switch (len) {
    case 1:
      msg += `${args[0]} argument`;
      break;
    case 2:
      msg += `${args[0]} and ${args[1]} arguments`;
      break;
    default:
      msg += args.slice(0, len - 1).join(', ');
      msg += `, and ${args[len - 1]} arguments`;
      break;
  }
  return `${msg} must be specified`;
}

function oneOf(expected, thing) {
  assert(expected, 'expected is required');
  assert(typeof thing === 'string', 'thing is required');
  if (Array.isArray(expected)) {
    const len = expected.length;
    assert(len > 0, 'At least one expected value needs to be specified');
    // tslint:disable-next-line
    expected = expected.map(i => String(i));
    if (len > 2) {
      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` + expected[len - 1];
    } else if (len === 2) {
      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
    } else {
      return `of ${thing} ${expected[0]}`;
    }
  } else {
    return `of ${thing} ${String(expected)}`;
  }
}

function bufferOutOfBounds(name, isWriting) {
  if (isWriting) {
    return 'Attempt to write outside buffer bounds';
  } else {
    return `"${name}" is outside of buffer bounds`;
  }
}