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1'use strict';
2
3const codes = {};
4
5function createErrorType(code, message, Base) {
6  if (!Base) {
7    Base = Error
8  }
9
10  function getMessage (arg1, arg2, arg3) {
11    if (typeof message === 'string') {
12      return message
13    } else {
14      return message(arg1, arg2, arg3)
15    }
16  }
17
18  class NodeError extends Base {
19    constructor (arg1, arg2, arg3) {
20      super(getMessage(arg1, arg2, arg3));
21    }
22  }
23
24  NodeError.prototype.name = Base.name;
25  NodeError.prototype.code = code;
26
27  codes[code] = NodeError;
28}
29
30// https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
31function oneOf(expected, thing) {
32  if (Array.isArray(expected)) {
33    const len = expected.length;
34    expected = expected.map((i) => String(i));
35    if (len > 2) {
36      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` +
37             expected[len - 1];
38    } else if (len === 2) {
39      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
40    } else {
41      return `of ${thing} ${expected[0]}`;
42    }
43  } else {
44    return `of ${thing} ${String(expected)}`;
45  }
46}
47
48// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
49function startsWith(str, search, pos) {
50	return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
51}
52
53// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
54function endsWith(str, search, this_len) {
55	if (this_len === undefined || this_len > str.length) {
56		this_len = str.length;
57	}
58	return str.substring(this_len - search.length, this_len) === search;
59}
60
61// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
62function includes(str, search, start) {
63  if (typeof start !== 'number') {
64    start = 0;
65  }
66
67  if (start + search.length > str.length) {
68    return false;
69  } else {
70    return str.indexOf(search, start) !== -1;
71  }
72}
73
74createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
75  return 'The value "' + value + '" is invalid for option "' + name + '"'
76}, TypeError);
77createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
78  // determiner: 'must be' or 'must not be'
79  let determiner;
80  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
81    determiner = 'must not be';
82    expected = expected.replace(/^not /, '');
83  } else {
84    determiner = 'must be';
85  }
86
87  let msg;
88  if (endsWith(name, ' argument')) {
89    // For cases like 'first argument'
90    msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
91  } else {
92    const type = includes(name, '.') ? 'property' : 'argument';
93    msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
94  }
95
96  msg += `. Received type ${typeof actual}`;
97  return msg;
98}, TypeError);
99createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
100createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
101  return 'The ' + name + ' method is not implemented'
102});
103createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
104createErrorType('ERR_STREAM_DESTROYED', function (name) {
105  return 'Cannot call ' + name + ' after a stream was destroyed';
106});
107createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
108createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
109createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
110createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
111createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
112  return 'Unknown encoding: ' + arg
113}, TypeError);
114createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
115
116module.exports.codes = codes;
117