Comparar texto

Encuentra la diferencia entre dos archivos de texto

Editor live

Ocultar sin cambios

Sin ajuste de línea

Vista

Nivel de detalle

Resaltado de sintaxis

Diffchecker Desktop La forma más segura de usar Diffchecker. ¡Obtén la app de Diffchecker Desktop: tus diffs nunca salen de tu computadora!Obtener Desktop

emailjs-3.6.0-to-4.0.0

Creado hace 4 añosEl diff nunca expira

20 eliminaciones

Líneas
Total
Eliminado

Caracteres
Total
Eliminado

Para continuar usando esta función, actualice a Diffchecker Pro Ver precios

703 líneas

8 adiciones

Líneas
Total
Añadido

Caracteres
Total
Añadido

Para continuar usando esta función, actualice a Diffchecker Pro Ver precios

699 líneas

'use strict';

import { existsSync, open, read, closeSync, close } from 'fs';

import { hostname } from 'os';

Object.defineProperty(exports, '__esModule', { value: true });

import { Stream } from 'stream';

import { TextEncoder, TextDecoder } from 'util';

var fs = require('fs');

import { createHmac } from 'crypto';

var os = require('os');

import { EventEmitter } from 'events';

var stream = require('stream');

import { Socket } from 'net';

var util = require('util');

import { connect, TLSSocket, createSecureContext } from 'tls';

var crypto = require('crypto');

var events = require('events');

var net = require('net');

var tls = require('tls');

* Operator tokens and which tokens are expected to end the sequence

const OPERATORS = new Map([

['"', '"'],

['(', ')'],

['<', '>'],

[',', ''],

// Groups are ended by semicolons

[':', ';'],

// Semicolons are not a legal delimiter per the RFC2822 grammar other

// than for terminating a group, but they are also not valid for any

// other use in this context. Given that some mail clients have

// historically allowed the semicolon as a delimiter equivalent to the

// comma in their UI, it makes sense to treat them the same as a comma

// when used outside of a group.

[';', ''],

]);

/**

* Tokenizes the original input string

* @param {string | string[] | undefined} address string(s) to tokenize

* @return {AddressToken[]} An array of operator|text tokens

function tokenizeAddress(address = '') {

var _a, _b;

const tokens = [];

let token = undefined;

let operator = undefined;

for (const character of address.toString()) {

if (((_a = operator === null || operator === void 0 ? void 0 : operator.length) !== null && _a !== void 0 ? _a : 0) > 0 && character === operator) {

tokens.push({ type: 'operator', value: character });

token = undefined;

operator = undefined;

}

else if (((_b = operator === null || operator === void 0 ? void 0 : operator.length) !== null && _b !== void 0 ? _b : 0) === 0 && OPERATORS.has(character)) {

tokens.push({ type: 'operator', value: character });

token = undefined;

operator = OPERATORS.get(character);

}

else {

if (token == null) {

token = { type: 'text', value: character };

tokens.push(token);

}

else {

token.value += character;

}

return tokens

.map((x) => {

x.value = x.value.trim();

return x;

})

.filter((x) => x.value.length > 0);

}

/**

* Converts tokens for a single address into an address object

* @param {AddressToken[]} tokens Tokens object

* @return {AddressObject[]} addresses object array

function convertAddressTokens(tokens) {

const addressObjects = [];

const groups = [];

let addresses = [];

let comments = [];

let texts = [];

let state = 'text';

let isGroup = false;

function handleToken(token) {

if (token.type === 'operator') {

switch (token.value) {

case '<':

state = 'address';

break;

case '(':

state = 'comment';

break;

case ':':

state = 'group';

isGroup = true;

break;

default:

state = 'text';

break;

}

else if (token.value.length > 0) {

switch (state) {

case 'address':

addresses.push(token.value);

break;

case 'comment':

comments.push(token.value);

break;

case 'group':

groups.push(token.value);

break;

default:

texts.push(token.value);

break;

}

// Filter out <addresses>, (comments) and regular text

for (const token of tokens) {

handleToken(token);

}

// If there is no text but a comment, replace the two

if (texts.length === 0 && comments.length > 0) {

texts = [...comments];

comments = [];

}

// http://tools.ietf.org/html/rfc2822#appendix-A.1.3

if (isGroup) {

addressObjects.push({

name: texts.length === 0 ? undefined : texts.join(' '),

group: groups.length > 0 ? addressparser(groups.join(',')) : [],

});

}

else {

// If no address was found, try to detect one from regular text

if (addresses.length === 0 && texts.length > 0) {

for (let i = texts.length - 1; i >= 0; i--) {

if (texts[i].match(/^[^@\s]+@[^@\s]+$/)) {

addresses = texts.splice(i, 1);

break;

}

// still no address

if (addresses.length === 0) {

for (let i = texts.length - 1; i >= 0; i--) {

texts[i] = texts[i]

.replace(/\s*\b[^@\s]+@[^@\s]+\b\s*/, (address) => {

if (addresses.length === 0) {

addresses = [address.trim()];

return ' ';

}

else {

return address;

}

})

.trim();

if (addresses.length > 0) {

break;

}

// If there's still is no text but a comment exixts, replace the two

if (texts.length === 0 && comments.length > 0) {

texts = [...comments];

comments = [];

}

// Keep only the first address occurence, push others to regular text

if (addresses.length > 1) {

texts = [...texts, ...addresses.splice(1)];

}

if (addresses.length === 0 && isGroup) {

return [];

}

else {

// Join values with spaces

let address = addresses.join(' ');

let name = texts.length === 0 ? address : texts.join(' ');

if (address === name) {

if (address.match(/@/)) {

name = '';

}

else {

address = '';

}

addressObjects.push({ address, name });

}

return addressObjects;

}

/**

* Parses structured e-mail addresses from an address field

* Example:

* "Name <address@domain>"

* will be converted to

* [{name: "Name", address: "address@domain"}]

* @param {string | string[] | undefined} address Address field

* @return {AddressObject[]} An array of address objects

function addressparser(address) {

const addresses = [];

let tokens = [];

for (const token of tokenizeAddress(address)) {

if (token.type === 'operator' &&

(token.value === ',' || token.value === ';')) {

if (tokens.length > 0) {

addresses.push(...convertAddressTokens(tokens));

}

tokens = [];

}

else {

tokens.push(token);

}

if (tokens.length > 0) {

addresses.push(...convertAddressTokens(tokens));

}

return addresses;

}

/**

* @param {Date} [date] an optional date to convert to RFC2822 format

* @param {boolean} [useUtc] whether to parse the date as UTC (default: false)

* @returns {string} the converted date

function getRFC2822Date(date = new Date(), useUtc = false) {

if (useUtc) {

return getRFC2822DateUTC(date);

}

const dates = date

.toString()

.replace('GMT', '')

.replace(/\s$.*$$/, '')

.split(' ');

dates[0] = dates[0] + ',';

const day = dates[1];

dates[1] = dates[2];

dates[2] = day;

return dates.join(' ');

}

/**

* @param {Date} [date] an optional date to convert to RFC2822 format (UTC)

* @returns {string} the converted date

function getRFC2822DateUTC(date = new Date()) {

const dates = date.toUTCString().split(' ');

dates.pop(); // remove timezone

dates.push('+0000');

return dates.join(' ');

}

/**

* RFC 2822 regex

* @see https://tools.ietf.org/html/rfc2822#section-3.3

* @see https://github.com/moment/moment/blob/a831fc7e2694281ce31e4f090bbcf90a690f0277/src/lib/create/from-string.js#L101

const rfc2822re = /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),?\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|([+-]\d{4}))$/.compile();

/**

* @param {string} [date] a string to check for conformance to the [rfc2822](https://tools.ietf.org/html/rfc2822#section-3.3) standard

* @returns {boolean} the result of the conformance check

function isRFC2822Date(date) {

return rfc2822re.test(date);

}

// adapted from https://github.com/emailjs/emailjs-mime-codec/blob/6909c706b9f09bc0e5c3faf48f723cca53e5b352/src/mimecodec.js

const encoder = new util.TextEncoder();

const encoder = new TextEncoder();

/**

* @see https://tools.ietf.org/html/rfc2045#section-6.7

const RANGES = [

[0x09],

[0x0a],

[0x0d],

[0x20, 0x3c],

[0x3e, 0x7e], // >?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}

];

const LOOKUP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');

const MAX_CHUNK_LENGTH = 16383; // must be multiple of 3

const MAX_MIME_WORD_LENGTH = 52;

const MAX_B64_MIME_WORD_BYTE_LENGTH = 39;

function tripletToBase64(num) {

return (LOOKUP[(num >> 18) & 0x3f] +

LOOKUP[(num >> 12) & 0x3f] +

LOOKUP[(num >> 6) & 0x3f] +

LOOKUP[num & 0x3f]);

}

function encodeChunk(uint8, start, end) {

let output = '';

for (let i = start; i < end; i += 3) {

output += tripletToBase64((uint8[i] << 16) + (uint8[i + 1] << 8) + uint8[i + 2]);

}

return output;

}

function encodeBase64(data) {

const len = data.length;

const extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes

let output = '';

// go through the array every three bytes, we'll deal with trailing stuff later

for (let i = 0, len2 = len - extraBytes; i < len2; i += MAX_CHUNK_LENGTH) {

output += encodeChunk(data, i, i + MAX_CHUNK_LENGTH > len2 ? len2 : i + MAX_CHUNK_LENGTH);

}

// pad the end with zeros, but make sure to not forget the extra bytes

if (extraBytes === 1) {

const tmp = data[len - 1];

output += LOOKUP[tmp >> 2];

output += LOOKUP[(tmp << 4) & 0x3f];

output += '==';

}

else if (extraBytes === 2) {

const tmp = (data[len - 2] << 8) + data[len - 1];

output += LOOKUP[tmp >> 10];

output += LOOKUP[(tmp >> 4) & 0x3f];

output += LOOKUP[(tmp << 2) & 0x3f];

output += '=';

}

return output;

}

/**

* Splits a mime encoded string. Needed for dividing mime words into smaller chunks

* @param {string} str Mime encoded string to be split up

* @param {number} maxlen Maximum length of characters for one part (minimum 12)

* @return {string[]} lines

function splitMimeEncodedString(str, maxlen = 12) {

const minWordLength = 12; // require at least 12 symbols to fit possible 4 octet UTF-8 sequences

const maxWordLength = Math.max(maxlen, minWordLength);

const lines = [];

while (str.length) {

let curLine = str.substr(0, maxWordLength);

const match = curLine.match(/=[0-9A-F]?$/i); // skip incomplete escaped char

if (match) {

curLine = curLine.substr(0, match.index);

}

let done = false;

while (!done) {

let chr;

done = true;

const match = str.substr(curLine.length).match(/^=([0-9A-F]{2})/i); // check if not middle of a unicode char sequence

if (match) {

chr = parseInt(match[1], 16);

// invalid sequence, move one char back anc recheck

if (chr < 0xc2 && chr > 0x7f) {

curLine = curLine.substr(0, curLine.length - 3);

done = false;

}

if (curLine.length) {

lines.push(curLine);

}

str = str.substr(curLine.length);

}

return lines;

}

/**

* @param {number} nr number

* @returns {boolean} if number is in range

function checkRanges(nr) {

return RANGES.reduce((val, range) => val ||

(range.length === 1 && nr === range[0]) ||

(range.length === 2 && nr >= range[0] && nr <= range[1]), false);

}

/**

* Encodes all non printable and non ascii bytes to =XX form, where XX is the

* byte value in hex. This function does not convert linebreaks etc. it

* only escapes character sequences

* NOTE: Encoding support depends on util.TextDecoder, which is severely limited

* prior to Node.js 13.

* @see https://nodejs.org/api/util.html#util_whatwg_supported_encodings

* @see https://github.com/nodejs/node/issues/19214

* @param {string|Uint8Array} data Either a string or an Uint8Array

* @param {string} encoding WHATWG supported encoding

* @return {string} Mime encoded string

function mimeEncode(data = '', encoding = 'utf-8') {

const decoder = new util.TextDecoder(encoding);

const decoder = new TextDecoder(encoding);

const buffer = typeof data === 'string'

? encoder.encode(data)

: encoder.encode(decoder.decode(data));

return buffer.reduce((aggregate, ord, index) => checkRanges(ord) &&

!((ord === 0x20 || ord === 0x09) &&

(index === buffer.length - 1 ||

buffer[index + 1] === 0x0a ||

buffer[index + 1] === 0x0d))

? // if the char is in allowed range, then keep as is, unless it is a ws in the end of a line

aggregate + String.fromCharCode(ord)

: `${aggregate}=${ord < 0x10 ? '0' : ''}${ord

.toString(16)

.toUpperCase()}`, '');

}

/**

* Encodes a string or an Uint8Array to an UTF-8 MIME Word

* NOTE: Encoding support depends on util.TextDecoder, which is severely limited

* prior to Node.js 13.

* @see https://tools.ietf.org/html/rfc2047

* @see https://nodejs.org/api/util.html#util_whatwg_supported_encodings

* @see https://github.com/nodejs/node/issues/19214

* @param {string|Uint8Array} data String to be encoded

* @param {'Q' | 'B'} mimeWordEncoding='Q' Encoding for the mime word, either Q or B

* @param {string} encoding WHATWG supported encoding

* @return {string} Single or several mime words joined together

function mimeWordEncode(data, mimeWordEncoding = 'Q', encoding = 'utf-8') {

let parts = [];

const decoder = new util.TextDecoder(encoding);

const decoder = new TextDecoder(encoding);

const str = typeof data === 'string' ? data : decoder.decode(data);

if (mimeWordEncoding === 'Q') {

const encodedStr = mimeEncode(str, encoding).replace(/[^a-z0-9!*+\-/=]/gi, (chr) => chr === ' '

? '_'

: '=' +

(chr.charCodeAt(0) < 0x10 ? '0' : '') +

chr.charCodeAt(0).toString(16).toUpperCase());

parts =

encodedStr.length < MAX_MIME_WORD_LENGTH

? [encodedStr]

: splitMimeEncodedString(encodedStr, MAX_MIME_WORD_LENGTH);

}

else {

// Fits as much as possible into every line without breaking utf-8 multibyte characters' octets up across lines

let j = 0;

let i = 0;

while (i < str.length) {

if (encoder.encode(str.substring(j, i)).length >

MAX_B64_MIME_WORD_BYTE_LENGTH) {

// we went one character too far, substring at the char before

parts.push(str.substring(j, i - 1));

j = i - 1;

}

else {

i++;

}

// add the remainder of the string

str.substring(j) && parts.push(str.substring(j));

parts = parts.map((x) => encoder.encode(x)).map((x) => encodeBase64(x));

}

return parts

.map((p) => `=?UTF-8?${mimeWordEncoding}?${p}?= `)

.join('')

.trim();

}

const CRLF$1 = '\r\n';

/**

* MIME standard wants 76 char chunks when sending out.

const MIMECHUNK = 76;

/**

* meets both base64 and mime divisibility

const MIME64CHUNK = (MIMECHUNK * 6);

/**

* size of the message stream buffer

const BUFFERSIZE = (MIMECHUNK * 24 * 7);

let counter = 0;

function generateBoundary() {

let text = '';

const possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'()+_,-./:=?";

for (let i = 0; i < 69; i++) {

text += possible.charAt(Math.floor(Math.random() * possible.length));

}

return text;

}

function convertPersonToAddress(person) {

return addressparser(person)

.map(({ name, address }) => {

return name

? `${mimeWordEncode(name).replace(/,/g, '=2C')} <${address}>`

: address;

})

.join(', ');

}

function convertDashDelimitedTextToSnakeCase(text) {

return text

.toLowerCase()

.replace(/^(.)|-(.)/g, (match) => match.toUpperCase());

}

class Message {

/**

* Construct an rfc2822-compliant message object.

* Special notes:

* - The `from` field is required.

* - At least one `to`, `cc`, or `bcc` header is also required.

* - You can also add whatever other headers you want.

* @see https://tools.ietf.org/html/rfc2822

* @param {Partial<MessageHeaders>} headers Message headers

constructor(headers) {

this.attachments = [];

this.header = {

'message-id': `<${new Date().getTime()}.${counter++}.${process.pid}@${os.hostname()}>`,

'message-id': `<${new Date().getTime()}.${counter++}.${process.pid}@${hostname()}>`,

date: getRFC2822Date(),

};

this.content = 'text/plain; charset=utf-8';

this.alternative = null;

for (const header in headers) {

// allow user to override default content-type to override charset or send a single non-text message

if (/^content-type$/i.test(header)) {

this.content = headers[header];

}

else if (header === 'text') {

this.text = headers[header];

}

else if (header === 'attachment' &&

typeof headers[header] === 'object') {

const attachment = headers[header];

if (Array.isArray(attachment)) {

for (let i = 0; i < attachment.length; i++) {

this.attach(attachment[i]);

}

else if (attachment != null) {

this.attach(attachment);

}

else if (header === 'subject') {

this.header.subject = mimeWordEncode(headers.subject);

}

else if (/^(cc|bcc|to|from)/i.test(header)) {

this.header[header.toLowerCase()] = convertPersonToAddress(headers[header]);

}

else {

// allow any headers the user wants to set??

this.header[header.toLowerCase()] = headers[header];

}

/**

* Attach a file to the message.

* Can be called multiple times, each adding a new attachment.

* @public

* @param {MessageAttachment} options attachment options

* @returns {Message} the current instance for chaining

attach(options) {

// sender can specify an attachment as an alternative

if (options.alternative) {

this.alternative = options;

this.alternative.charset = options.charset || 'utf-8';

this.alternative.type = options.type || 'text/html';

this.alternative.inline = true;

}

else {

this.attachments.push(options);

}

return this;

}

/**

* @public

* @returns {{ isValid: boolean, validationError: (string | undefined) }} an object specifying whether this message is validly formatted, and the first validation error if it is not.

checkValidity() {

if (typeof this.header.from !== 'string' &&

Array.isArray(this.header.from) === false) {

return {

isValid: false,

validationError: 'Message must have a `from` header',

};

}

if (typeof this.header.to !== 'string' &&

Array.isArray(this.header.to) === false &&

typeof this.header.cc !== 'string' &&

Array.isArray(this.header.cc) === false &&

typeof this.header.bcc !== 'string' &&

Array.isArray(this.header.bcc) === false) {

return {

isValid: false,

validationError: 'Message must have at least one `to`, `cc`, or `bcc` header',

};

}

if (this.attachments.length > 0) {

const failed = [];

this.attachments.forEach((attachment) => {

if (attachment.path) {

if (fs.existsSync(attachment.path) === false) {

if (existsSync(attachment.path) === false) {

failed.push(`${attachment.path} does not exist`);

}

else if (attachment.stream) {

if (!attachment.stream.readable) {

failed.push('attachment stream is not readable');

}

else if (!attachment.data) {

failed.push('attachment has no data associated with it');

}

});

return {

isValid: failed.length === 0,

validationError: failed.join(', '),

};

}

return { isValid: true, validationError: undefined };

}

/**

* @public

* @deprecated does not conform to the `errback` style followed by the rest of the library, and will be removed in the next major version. use `checkValidity` instead.

* @param {function(isValid: boolean, invalidReason: (string | undefined)): void} callback .

* @returns {void}

valid(callback) {

const { isValid, validationError } = this.checkValidity();

callback(isValid, validationError);

}

/**

* @public

* @returns {MessageStream} a stream of the current message

stream() {

return new MessageStream(this);

}

/**

* @public

* @param {function(Error, string): void} callback the function to call with the error and buffer

* @returns {void}

read(callback) {

let buffer = '';

const str = this.stream();

str.on('data', (data) => (buffer += data));

str.on('end', (err) => callback(err, buffer));

str.on('error', (err) => callback(err, buffer));

}

readAsync() {

return new Promise((resolve, reject) => {

this.read((err, buffer) => {

if (err != null) {

reject(err);

}

else {

resolve(buffer);

}

});

}

class MessageStream extends stream.Stream {

class MessageStream extends Stream {

/**

* @param {Message} message the message to stream

constructor(message) {

super();

this.message = message;

this.readable = true;

this.paused = false;

this.buffer = Buffer.alloc(MIMECHUNK * 24 * 7);

this.bufferIndex = 0;

/**

* @param {string} [data] the data to output

* @param {Function} [callback] the function

* @param {any[]} [args] array of arguments to pass to the callback

* @returns {void}

const output = (data) => {

// can we buffer the data?

if (this.buffer != null) {

const bytes = Buffer.byteLength(data);

if (bytes + this.bufferIndex < this.buffer.length) {

this.buffer.write(data, this.bufferIndex);

this.bufferIndex += bytes;

}

// we can't buffer the data, so ship it out!

else if (bytes > this.buffer.length) {

if (this.bufferIndex) {

this.emit('data', this.buffer.toString('utf-8', 0, this.bufferIndex));

this.bufferIndex = 0;

}

const loops = Math.ceil(data.length / this.buffer.length);

let loop = 0;

while (loop < loops) {

this.emit('data', data.substring(this.buffer.length * loop, this.buffer.length * (loop + 1)));

loop++;

}

} // we need to clean out the buffer, it is getting full

else {

if (!this.paused) {

this.emit('data', this.buffer.toString('utf-8', 0, this.bufferIndex));

this.buffer.write(data, 0);

this.bufferIndex = bytes;

}

Diferencias guardadas

Texto original

Abrir archivo

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var fs = require('fs');
var os = require('os');
var stream = require('stream');
var util = require('util');
var crypto = require('crypto');
var events = require('events');
var net = require('net');
var tls = require('tls');

/*
 * Operator tokens and which tokens are expected to end the sequence
 */
const OPERATORS = new Map([
    ['"', '"'],
    ['(', ')'],
    ['<', '>'],
    [',', ''],
    // Groups are ended by semicolons
    [':', ';'],
    // Semicolons are not a legal delimiter per the RFC2822 grammar other
    // than for terminating a group, but they are also not valid for any
    // other use in this context.  Given that some mail clients have
    // historically allowed the semicolon as a delimiter equivalent to the
    // comma in their UI, it makes sense to treat them the same as a comma
    // when used outside of a group.
    [';', ''],
]);
/**
 * Tokenizes the original input string
 *
 * @param {string | string[] | undefined} address string(s) to tokenize
 * @return {AddressToken[]} An array of operator|text tokens
 */
function tokenizeAddress(address = '') {
    var _a, _b;
    const tokens = [];
    let token = undefined;
    let operator = undefined;
    for (const character of address.toString()) {
        if (((_a = operator === null || operator === void 0 ? void 0 : operator.length) !== null && _a !== void 0 ? _a : 0) > 0 && character === operator) {
            tokens.push({ type: 'operator', value: character });
            token = undefined;
            operator = undefined;
        }
        else if (((_b = operator === null || operator === void 0 ? void 0 : operator.length) !== null && _b !== void 0 ? _b : 0) === 0 && OPERATORS.has(character)) {
            tokens.push({ type: 'operator', value: character });
            token = undefined;
            operator = OPERATORS.get(character);
        }
        else {
            if (token == null) {
                token = { type: 'text', value: character };
                tokens.push(token);
            }
            else {
                token.value += character;
            }
        }
    }
    return tokens
        .map((x) => {
        x.value = x.value.trim();
        return x;
    })
        .filter((x) => x.value.length > 0);
}
/**
 * Converts tokens for a single address into an address object
 *
 * @param {AddressToken[]} tokens Tokens object
 * @return {AddressObject[]} addresses object array
 */
function convertAddressTokens(tokens) {
    const addressObjects = [];
    const groups = [];
    let addresses = [];
    let comments = [];
    let texts = [];
    let state = 'text';
    let isGroup = false;
    function handleToken(token) {
        if (token.type === 'operator') {
            switch (token.value) {
                case '<':
                    state = 'address';
                    break;
                case '(':
                    state = 'comment';
                    break;
                case ':':
                    state = 'group';
                    isGroup = true;
                    break;
                default:
                    state = 'text';
                    break;
            }
        }
        else if (token.value.length > 0) {
            switch (state) {
                case 'address':
                    addresses.push(token.value);
                    break;
                case 'comment':
                    comments.push(token.value);
                    break;
                case 'group':
                    groups.push(token.value);
                    break;
                default:
                    texts.push(token.value);
                    break;
            }
        }
    }
    // Filter out <addresses>, (comments) and regular text
    for (const token of tokens) {
        handleToken(token);
    }
    // If there is no text but a comment, replace the two
    if (texts.length === 0 && comments.length > 0) {
        texts = [...comments];
        comments = [];
    }
    // http://tools.ietf.org/html/rfc2822#appendix-A.1.3
    if (isGroup) {
        addressObjects.push({
            name: texts.length === 0 ? undefined : texts.join(' '),
            group: groups.length > 0 ? addressparser(groups.join(',')) : [],
        });
    }
    else {
        // If no address was found, try to detect one from regular text
        if (addresses.length === 0 && texts.length > 0) {
            for (let i = texts.length - 1; i >= 0; i--) {
                if (texts[i].match(/^[^@\s]+@[^@\s]+$/)) {
                    addresses = texts.splice(i, 1);
                    break;
                }
            }
            // still no address
            if (addresses.length === 0) {
                for (let i = texts.length - 1; i >= 0; i--) {
                    texts[i] = texts[i]
                        .replace(/\s*\b[^@\s]+@[^@\s]+\b\s*/, (address) => {
                        if (addresses.length === 0) {
                            addresses = [address.trim()];
                            return ' ';
                        }
                        else {
                            return address;
                        }
                    })
                        .trim();
                    if (addresses.length > 0) {
                        break;
                    }
                }
            }
        }
        // If there's still is no text but a comment exixts, replace the two
        if (texts.length === 0 && comments.length > 0) {
            texts = [...comments];
            comments = [];
        }
        // Keep only the first address occurence, push others to regular text
        if (addresses.length > 1) {
            texts = [...texts, ...addresses.splice(1)];
        }
        if (addresses.length === 0 && isGroup) {
            return [];
        }
        else {
            // Join values with spaces
            let address = addresses.join(' ');
            let name = texts.length === 0 ? address : texts.join(' ');
            if (address === name) {
                if (address.match(/@/)) {
                    name = '';
                }
                else {
                    address = '';
                }
            }
            addressObjects.push({ address, name });
        }
    }
    return addressObjects;
}
/**
 * Parses structured e-mail addresses from an address field
 *
 * Example:
 *
 *    "Name <address@domain>"
 *
 * will be converted to
 *
 *     [{name: "Name", address: "address@domain"}]
 *
 * @param {string | string[] | undefined} address Address field
 * @return {AddressObject[]} An array of address objects
 */
function addressparser(address) {
    const addresses = [];
    let tokens = [];
    for (const token of tokenizeAddress(address)) {
        if (token.type === 'operator' &&
            (token.value === ',' || token.value === ';')) {
            if (tokens.length > 0) {
                addresses.push(...convertAddressTokens(tokens));
            }
            tokens = [];
        }
        else {
            tokens.push(token);
        }
    }
    if (tokens.length > 0) {
        addresses.push(...convertAddressTokens(tokens));
    }
    return addresses;
}

/**
 * @param {Date} [date] an optional date to convert to RFC2822 format
 * @param {boolean} [useUtc] whether to parse the date as UTC (default: false)
 * @returns {string} the converted date
 */
function getRFC2822Date(date = new Date(), useUtc = false) {
    if (useUtc) {
        return getRFC2822DateUTC(date);
    }
    const dates = date
        .toString()
        .replace('GMT', '')
        .replace(/\s$.*$$/, '')
        .split(' ');
    dates[0] = dates[0] + ',';
    const day = dates[1];
    dates[1] = dates[2];
    dates[2] = day;
    return dates.join(' ');
}
/**
 * @param {Date} [date] an optional date to convert to RFC2822 format (UTC)
 * @returns {string} the converted date
 */
function getRFC2822DateUTC(date = new Date()) {
    const dates = date.toUTCString().split(' ');
    dates.pop(); // remove timezone
    dates.push('+0000');
    return dates.join(' ');
}
/**
 * RFC 2822 regex
 * @see https://tools.ietf.org/html/rfc2822#section-3.3
 * @see https://github.com/moment/moment/blob/a831fc7e2694281ce31e4f090bbcf90a690f0277/src/lib/create/from-string.js#L101
 */
const rfc2822re = /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),?\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|([+-]\d{4}))$/.compile();
/**
 * @param {string} [date] a string to check for conformance to the [rfc2822](https://tools.ietf.org/html/rfc2822#section-3.3) standard
 * @returns {boolean} the result of the conformance check
 */
function isRFC2822Date(date) {
    return rfc2822re.test(date);
}

// adapted from https://github.com/emailjs/emailjs-mime-codec/blob/6909c706b9f09bc0e5c3faf48f723cca53e5b352/src/mimecodec.js
const encoder = new util.TextEncoder();
/**
 * @see https://tools.ietf.org/html/rfc2045#section-6.7
 */
const RANGES = [
    [0x09],
    [0x0a],
    [0x0d],
    [0x20, 0x3c],
    [0x3e, 0x7e], // >?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}
];
const LOOKUP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');
const MAX_CHUNK_LENGTH = 16383; // must be multiple of 3
const MAX_MIME_WORD_LENGTH = 52;
const MAX_B64_MIME_WORD_BYTE_LENGTH = 39;
function tripletToBase64(num) {
    return (LOOKUP[(num >> 18) & 0x3f] +
        LOOKUP[(num >> 12) & 0x3f] +
        LOOKUP[(num >> 6) & 0x3f] +
        LOOKUP[num & 0x3f]);
}
function encodeChunk(uint8, start, end) {
    let output = '';
    for (let i = start; i < end; i += 3) {
        output += tripletToBase64((uint8[i] << 16) + (uint8[i + 1] << 8) + uint8[i + 2]);
    }
    return output;
}
function encodeBase64(data) {
    const len = data.length;
    const extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes
    let output = '';
    // go through the array every three bytes, we'll deal with trailing stuff later
    for (let i = 0, len2 = len - extraBytes; i < len2; i += MAX_CHUNK_LENGTH) {
        output += encodeChunk(data, i, i + MAX_CHUNK_LENGTH > len2 ? len2 : i + MAX_CHUNK_LENGTH);
    }
    // pad the end with zeros, but make sure to not forget the extra bytes
    if (extraBytes === 1) {
        const tmp = data[len - 1];
        output += LOOKUP[tmp >> 2];
        output += LOOKUP[(tmp << 4) & 0x3f];
        output += '==';
    }
    else if (extraBytes === 2) {
        const tmp = (data[len - 2] << 8) + data[len - 1];
        output += LOOKUP[tmp >> 10];
        output += LOOKUP[(tmp >> 4) & 0x3f];
        output += LOOKUP[(tmp << 2) & 0x3f];
        output += '=';
    }
    return output;
}
/**
 * Splits a mime encoded string. Needed for dividing mime words into smaller chunks
 *
 * @param {string} str Mime encoded string to be split up
 * @param {number} maxlen Maximum length of characters for one part (minimum 12)
 * @return {string[]} lines
 */
function splitMimeEncodedString(str, maxlen = 12) {
    const minWordLength = 12; // require at least 12 symbols to fit possible 4 octet UTF-8 sequences
    const maxWordLength = Math.max(maxlen, minWordLength);
    const lines = [];
    while (str.length) {
        let curLine = str.substr(0, maxWordLength);
        const match = curLine.match(/=[0-9A-F]?$/i); // skip incomplete escaped char
        if (match) {
            curLine = curLine.substr(0, match.index);
        }
        let done = false;
        while (!done) {
            let chr;
            done = true;
            const match = str.substr(curLine.length).match(/^=([0-9A-F]{2})/i); // check if not middle of a unicode char sequence
            if (match) {
                chr = parseInt(match[1], 16);
                // invalid sequence, move one char back anc recheck
                if (chr < 0xc2 && chr > 0x7f) {
                    curLine = curLine.substr(0, curLine.length - 3);
                    done = false;
                }
            }
        }
        if (curLine.length) {
            lines.push(curLine);
        }
        str = str.substr(curLine.length);
    }
    return lines;
}
/**
 *
 * @param {number} nr number
 * @returns {boolean} if number is in range
 */
function checkRanges(nr) {
    return RANGES.reduce((val, range) => val ||
        (range.length === 1 && nr === range[0]) ||
        (range.length === 2 && nr >= range[0] && nr <= range[1]), false);
}
/**
 * Encodes all non printable and non ascii bytes to =XX form, where XX is the
 * byte value in hex. This function does not convert linebreaks etc. it
 * only escapes character sequences
 *
 * NOTE: Encoding support depends on util.TextDecoder, which is severely limited
 * prior to Node.js 13.
 *
 * @see https://nodejs.org/api/util.html#util_whatwg_supported_encodings
 * @see https://github.com/nodejs/node/issues/19214
 *
 * @param {string|Uint8Array} data Either a string or an Uint8Array
 * @param {string} encoding WHATWG supported encoding
 * @return {string} Mime encoded string
 */
function mimeEncode(data = '', encoding = 'utf-8') {
    const decoder = new util.TextDecoder(encoding);
    const buffer = typeof data === 'string'
        ? encoder.encode(data)
        : encoder.encode(decoder.decode(data));
    return buffer.reduce((aggregate, ord, index) => checkRanges(ord) &&
        !((ord === 0x20 || ord === 0x09) &&
            (index === buffer.length - 1 ||
                buffer[index + 1] === 0x0a ||
                buffer[index + 1] === 0x0d))
        ? // if the char is in allowed range, then keep as is, unless it is a ws in the end of a line
            aggregate + String.fromCharCode(ord)
        : `${aggregate}=${ord < 0x10 ? '0' : ''}${ord
            .toString(16)
            .toUpperCase()}`, '');
}
/**
 * Encodes a string or an Uint8Array to an UTF-8 MIME Word
 *
 * NOTE: Encoding support depends on util.TextDecoder, which is severely limited
 * prior to Node.js 13.
 *
 * @see https://tools.ietf.org/html/rfc2047
 * @see https://nodejs.org/api/util.html#util_whatwg_supported_encodings
 * @see https://github.com/nodejs/node/issues/19214
 *
 * @param {string|Uint8Array} data String to be encoded
 * @param {'Q' | 'B'} mimeWordEncoding='Q' Encoding for the mime word, either Q or B
 * @param {string} encoding WHATWG supported encoding
 * @return {string} Single or several mime words joined together
 */
function mimeWordEncode(data, mimeWordEncoding = 'Q', encoding = 'utf-8') {
    let parts = [];
    const decoder = new util.TextDecoder(encoding);
    const str = typeof data === 'string' ? data : decoder.decode(data);
    if (mimeWordEncoding === 'Q') {
        const encodedStr = mimeEncode(str, encoding).replace(/[^a-z0-9!*+\-/=]/gi, (chr) => chr === ' '
            ? '_'
            : '=' +
                (chr.charCodeAt(0) < 0x10 ? '0' : '') +
                chr.charCodeAt(0).toString(16).toUpperCase());
        parts =
            encodedStr.length < MAX_MIME_WORD_LENGTH
                ? [encodedStr]
                : splitMimeEncodedString(encodedStr, MAX_MIME_WORD_LENGTH);
    }
    else {
        // Fits as much as possible into every line without breaking utf-8 multibyte characters' octets up across lines
        let j = 0;
        let i = 0;
        while (i < str.length) {
            if (encoder.encode(str.substring(j, i)).length >
                MAX_B64_MIME_WORD_BYTE_LENGTH) {
                // we went one character too far, substring at the char before
                parts.push(str.substring(j, i - 1));
                j = i - 1;
            }
            else {
                i++;
            }
        }
        // add the remainder of the string
        str.substring(j) && parts.push(str.substring(j));
        parts = parts.map((x) => encoder.encode(x)).map((x) => encodeBase64(x));
    }
    return parts
        .map((p) => `=?UTF-8?${mimeWordEncoding}?${p}?= `)
        .join('')
        .trim();
}

/**
 * @readonly
 * @enum
 */
const SMTPErrorStates = {
    COULDNOTCONNECT: 1,
    BADRESPONSE: 2,
    AUTHFAILED: 3,
    TIMEDOUT: 4,
    ERROR: 5,
    NOCONNECTION: 6,
    AUTHNOTSUPPORTED: 7,
    CONNECTIONCLOSED: 8,
    CONNECTIONENDED: 9,
    CONNECTIONAUTH: 10,
};
class SMTPError extends Error {
    /**
     * @protected
     * @param {string} message error message
     */
    constructor(message) {
        super(message);
        this.code = null;
        this.smtp = null;
        this.previous = null;
    }
    /**
     *
     * @param {string} message error message
     * @param {number} code smtp error state
     * @param {Error | null} error previous error
     * @param {unknown} smtp arbitrary data
     * @returns {SMTPError} error
     */
    static create(message, code, error, smtp) {
        const msg = (error === null || error === void 0 ? void 0 : error.message) ? `${message} (${error.message})` : message;
        const err = new SMTPError(msg);
        err.code = code;
        err.smtp = smtp;
        if (error) {
            err.previous = error;
        }
        return err;
    }
}

class SMTPResponseMonitor {
    constructor(stream, timeout, onerror) {
        let buffer = '';
        const notify = () => {
            var _a, _b;
            if (buffer.length) {
                // parse buffer for response codes
                const line = buffer.replace('\r', '');
                if (!((_b = (_a = line
                    .trim()
                    .split(/\n/)
                    .pop()) === null || _a === void 0 ? void 0 : _a.match(/^(\d{3})\s/)) !== null && _b !== void 0 ? _b : false)) {
                    return;
                }
                const match = line ? line.match(/(\d+)\s?(.*)/) : null;
                const data = match !== null
                    ? { code: match[1], message: match[2], data: line }
                    : { code: -1, data: line };
                stream.emit('response', null, data);
                buffer = '';
            }
        };
        const error = (err) => {
            stream.emit('response', SMTPError.create('connection encountered an error', SMTPErrorStates.ERROR, err));
        };
        const timedout = (err) => {
            stream.end();
            stream.emit('response', SMTPError.create('timedout while connecting to smtp server', SMTPErrorStates.TIMEDOUT, err));
        };
        const watch = (data) => {
            if (data !== null) {
                buffer += data.toString();
                notify();
            }
        };
        const close = (err) => {
            stream.emit('response', SMTPError.create('connection has closed', SMTPErrorStates.CONNECTIONCLOSED, err));
        };
        const end = (err) => {
            stream.emit('response', SMTPError.create('connection has ended', SMTPErrorStates.CONNECTIONENDED, err));
        };
        this.stop = (err) => {
            stream.removeAllListeners('response');
            stream.removeListener('data', watch);
            stream.removeListener('end', end);
            stream.removeListener('close', close);
            stream.removeListener('error', error);
            if (err != null && typeof onerror === 'function') {
                onerror(err);
            }
        };
        stream.on('data', watch);
        stream.on('end', end);
        stream.on('close', close);
        stream.on('error', error);
        stream.setTimeout(timeout, timedout);
    }
}

/**
 * @readonly
 * @enum
 */
const AUTH_METHODS = {
    PLAIN: 'PLAIN',
    'CRAM-MD5': 'CRAM-MD5',
    LOGIN: 'LOGIN',
    XOAUTH2: 'XOAUTH2',
};
/**
 * @readonly
 * @enum
 */
const SMTPState = {
    NOTCONNECTED: 0,
    CONNECTING: 1,
    CONNECTED: 2,
};
const DEFAULT_TIMEOUT = 5000;
const SMTP_PORT = 25;
const SMTP_SSL_PORT = 465;
const SMTP_TLS_PORT = 587;
const CRLF = '\r\n';
const GREYLIST_DELAY = 300;
let DEBUG = 0;
/**
 * @param {...any[]} args the message(s) to log
 * @returns {void}
 */
const log = (...args) => {
    if (DEBUG === 1) {
        args.forEach((d) => console.log(typeof d === 'object'
            ? d instanceof Error
                ? d.message
                : JSON.stringify(d)
            : d));
    }
};
/**
 * @param {function(...any[]): void} callback the function to call
 * @param {...any[]} args the arguments to apply to the function
 * @returns {void}
 */
const caller = (callback, ...args) => {
    if (typeof callback === 'function') {
        callback(...args);
    }
};
class SMTPConnection extends events.EventEmitter {
    /**
     * SMTP class written using python's (2.7) smtplib.py as a base.
     *
     * To target a Message Transfer Agent (MTA), omit all options.
     *
     * NOTE: `host` is trimmed before being used to establish a connection; however, the original untrimmed value will still be visible in configuration.
     */
    constructor({ timeout, host, user, password, domain, port, ssl, tls, logger, authentication, } = {}) {
        var _a;
        super();
        this.timeout = DEFAULT_TIMEOUT;
        this.log = log;
        this.authentication = [
            AUTH_METHODS['CRAM-MD5'],
            AUTH_METHODS.LOGIN,
            AUTH_METHODS.PLAIN,
            AUTH_METHODS.XOAUTH2,
        ];
        this._state = SMTPState.NOTCONNECTED;
        this._secure = false;
        this.loggedin = false;
        this.sock = null;
        this.features = null;
        this.monitor = null;
        this.domain = os.hostname();
        this.host = 'localhost';
        this.ssl = false;
        this.tls = false;
        this.greylistResponseTracker = new WeakSet();
        if (Array.isArray(authentication)) {
            this.authentication = authentication;
        }
        if (typeof timeout === 'number') {
            this.timeout = timeout;
        }
        if (typeof domain === 'string') {
            this.domain = domain;
        }
        if (typeof host === 'string') {
            this.host = host;
        }
        if (ssl != null &&
            (typeof ssl === 'boolean' ||
                (typeof ssl === 'object' && Array.isArray(ssl) === false))) {
            this.ssl = ssl;
        }
        if (tls != null &&
            (typeof tls === 'boolean' ||
                (typeof tls === 'object' && Array.isArray(tls) === false))) {
            this.tls = tls;
        }
        this.port = port || (ssl ? SMTP_SSL_PORT : tls ? SMTP_TLS_PORT : SMTP_PORT);
        this.loggedin = user && password ? false : true;
        if (!user && ((_a = password === null || password === void 0 ? void 0 : password.length) !== null && _a !== void 0 ? _a : 0) > 0) {
            throw new Error('`password` cannot be set without `user`');
        }
        // keep these strings hidden when quicky debugging/logging
        this.user = () => user;
        this.password = () => password;
        if (typeof logger === 'function') {
            this.log = log;
        }
    }
    /**
     * @public
     * @param {0 | 1} level -
     * @returns {void}
     */
    debug(level) {
        DEBUG = level;
    }
    /**
     * @public
     * @returns {SMTPState} the current state
     */
    state() {
        return this._state;
    }
    /**
     * @public
     * @returns {boolean} whether or not the instance is authorized
     */
    authorized() {
        return this.loggedin;
    }
    /**
     * Establish an SMTP connection.
     *
     * NOTE: `host` is trimmed before being used to establish a connection; however, the original untrimmed value will still be visible in configuration.
     *
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {number} [port] the port to use for the connection
     * @param {string} [host] the hostname to use for the connection
     * @param {ConnectOptions} [options={}] the options
     * @returns {void}
     */
    connect(callback, port = this.port, host = this.host, options = {}) {
        this.port = port;
        this.host = host;
        this.ssl = options.ssl || this.ssl;
        if (this._state !== SMTPState.NOTCONNECTED) {
            this.quit(() => this.connect(callback, port, host, options));
        }
        /**
         * @returns {void}
         */
        const connected = () => {
            this.log(`connected: ${this.host}:${this.port}`);
            if (this.ssl && !this.tls) {
                // if key/ca/cert was passed in, check if connection is authorized
                if (typeof this.ssl !== 'boolean' &&
                    this.sock instanceof tls.TLSSocket &&
                    !this.sock.authorized) {
                    this.close(true);
                    caller(callback, SMTPError.create('could not establish an ssl connection', SMTPErrorStates.CONNECTIONAUTH));
                }
                else {
                    this._secure = true;
                }
            }
        };
        /**
         * @param {Error} err err
         * @returns {void}
         */
        const connectedErrBack = (err) => {
            if (!err) {
                connected();
            }
            else {
                this.close(true);
                this.log(err);
                caller(callback, SMTPError.create('could not connect', SMTPErrorStates.COULDNOTCONNECT, err));
            }
        };
        const response = (err, msg) => {
            if (err) {
                if (this._state === SMTPState.NOTCONNECTED && !this.sock) {
                    return;
                }
                this.close(true);
                caller(callback, err);
            }
            else if (msg.code == '220') {
                this.log(msg.data);
                // might happen first, so no need to wait on connected()
                this._state = SMTPState.CONNECTED;
                caller(callback, null, msg.data);
            }
            else {
                this.log(`response (data): ${msg.data}`);
                this.quit(() => {
                    caller(callback, SMTPError.create('bad response on connection', SMTPErrorStates.BADRESPONSE, err, msg.data));
                });
            }
        };
        this._state = SMTPState.CONNECTING;
        this.log(`connecting: ${this.host}:${this.port}`);
        if (this.ssl) {
            this.sock = tls.connect(this.port, this.host.trim(), typeof this.ssl === 'object' ? this.ssl : {}, connected);
        }
        else {
            this.sock = new net.Socket();
            this.sock.connect(this.port, this.host.trim(), connectedErrBack);
        }
        this.monitor = new SMTPResponseMonitor(this.sock, this.timeout, () => this.close(true));
        this.sock.once('response', response);
        this.sock.once('error', response); // the socket could reset or throw, so let's handle it and let the user know
    }
    /**
     * @public
     * @param {string} str the string to send
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    send(str, callback) {
        if (this.sock != null && this._state === SMTPState.CONNECTED) {
            this.log(str);
            this.sock.once('response', (err, msg) => {
                if (err) {
                    caller(callback, err);
                }
                else {
                    this.log(msg.data);
                    caller(callback, null, msg);
                }
            });
            if (this.sock.writable) {
                this.sock.write(str);
            }
        }
        else {
            this.close(true);
            caller(callback, SMTPError.create('no connection has been established', SMTPErrorStates.NOCONNECTION));
        }
    }
    /**
     * @public
     * @param {string} cmd command to issue
     * @param {function(...any[]): void} callback function to call after response
     * @param {(number[] | number)} [codes=[250]] array codes
     * @returns {void}
     */
    command(cmd, callback, codes = [250]) {
        const codesArray = Array.isArray(codes)
            ? codes
            : typeof codes === 'number'
                ? [codes]
                : [250];
        const response = (err, msg) => {
            if (err) {
                caller(callback, err);
            }
            else {
                const code = Number(msg.code);
                if (codesArray.indexOf(code) !== -1) {
                    caller(callback, err, msg.data, msg.message);
                }
                else if ((code === 450 || code === 451) &&
                    msg.message.toLowerCase().includes('greylist') &&
                    this.greylistResponseTracker.has(response) === false) {
                    this.greylistResponseTracker.add(response);
                    setTimeout(() => {
                        this.send(cmd + CRLF, response);
                    }, GREYLIST_DELAY);
                }
                else {
                    const suffix = msg.message ? `: ${msg.message}` : '';
                    const errorMessage = `bad response on command '${cmd.split(' ')[0]}'${suffix}`;
                    caller(callback, SMTPError.create(errorMessage, SMTPErrorStates.BADRESPONSE, null, msg.data));
                }
            }
        };
        this.greylistResponseTracker.delete(response);
        this.send(cmd + CRLF, response);
    }
    /**
     * @public
     * @description SMTP 'helo' command.
     *
     * Hostname to send for self command defaults to the FQDN of the local
     * host.
     *
     * As this command was deprecated by rfc2821, it should only be used for compatibility with non-compliant servers.
     * @see https://tools.ietf.org/html/rfc2821#appendix-F.3
     *
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} domain the domain to associate with the 'helo' request
     * @returns {void}
     */
    helo(callback, domain) {
        this.command(`helo ${domain || this.domain}`, (err, data) => {
            if (err) {
                caller(callback, err);
            }
            else {
                this.parse_smtp_features(data);
                caller(callback, err, data);
            }
        });
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    starttls(callback) {
        const response = (err, msg) => {
            if (this.sock == null) {
                throw new Error('null socket');
            }
            if (err) {
                err.message += ' while establishing a starttls session';
                caller(callback, err);
            }
            else {
                const secureContext = tls.createSecureContext(typeof this.tls === 'object' ? this.tls : {});
                const secureSocket = new tls.TLSSocket(this.sock, { secureContext });
                secureSocket.on('error', (err) => {
                    this.close(true);
                    caller(callback, err);
                });
                this._secure = true;
                this.sock = secureSocket;
                new SMTPResponseMonitor(this.sock, this.timeout, () => this.close(true));
                caller(callback, msg.data);
            }
        };
        this.command('starttls', response, [220]);
    }
    /**
     * @public
     * @param {string} data the string to parse for features
     * @returns {void}
     */
    parse_smtp_features(data) {
        //  According to RFC1869 some (badly written)
        //  MTA's will disconnect on an ehlo. Toss an exception if
        //  that happens -ddm
        data.split('\n').forEach((ext) => {
            const parse = ext.match(/^(?:\d+[-=]?)\s*?([^\s]+)(?:\s+(.*)\s*?)?$/);
            // To be able to communicate with as many SMTP servers as possible,
            // we have to take the old-style auth advertisement into account,
            // because:
            // 1) Else our SMTP feature parser gets confused.
            // 2) There are some servers that only advertise the auth methods we
            // support using the old style.
            if (parse != null && this.features != null) {
                // RFC 1869 requires a space between ehlo keyword and parameters.
                // It's actually stricter, in that only spaces are allowed between
                // parameters, but were not going to check for that here.  Note
                // that the space isn't present if there are no parameters.
                this.features[parse[1].toLowerCase()] = parse[2] || true;
            }
        });
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} domain the domain to associate with the 'ehlo' request
     * @returns {void}
     */
    ehlo(callback, domain) {
        this.features = {};
        this.command(`ehlo ${domain || this.domain}`, (err, data) => {
            if (err) {
                caller(callback, err);
            }
            else {
                this.parse_smtp_features(data);
                if (this.tls && !this._secure) {
                    this.starttls(() => this.ehlo(callback, domain));
                }
                else {
                    caller(callback, err, data);
                }
            }
        });
    }
    /**
     * @public
     * @param {string} opt the features keyname to check
     * @returns {boolean} whether the extension exists
     */
    has_extn(opt) {
        var _a;
        return ((_a = this.features) !== null && _a !== void 0 ? _a : {})[opt.toLowerCase()] === undefined;
    }
    /**
     * @public
     * @description SMTP 'help' command, returns text from the server
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} domain the domain to associate with the 'help' request
     * @returns {void}
     */
    help(callback, domain) {
        this.command(domain ? `help ${domain}` : 'help', callback, [211, 214]);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    rset(callback) {
        this.command('rset', callback);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    noop(callback) {
        this.send('noop', callback);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} from the sender
     * @returns {void}
     */
    mail(callback, from) {
        this.command(`mail FROM:${from}`, callback);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} to the receiver
     * @returns {void}
     */
    rcpt(callback, to) {
        this.command(`RCPT TO:${to}`, callback, [250, 251]);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    data(callback) {
        this.command('data', callback, [354]);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    data_end(callback) {
        this.command(`${CRLF}.`, callback);
    }
    /**
     * @public
     * @param {string} data the message to send
     * @returns {void}
     */
    message(data) {
        var _a, _b;
        this.log(data);
        (_b = (_a = this.sock) === null || _a === void 0 ? void 0 : _a.write(data)) !== null && _b !== void 0 ? _b : this.log('no socket to write to');
    }
    /**
     * @public
     * @description SMTP 'verify' command -- checks for address validity.
     * @param {string} address the address to validate
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    verify(address, callback) {
        this.command(`vrfy ${address}`, callback, [250, 251, 252]);
    }
    /**
     * @public
     * @description SMTP 'expn' command -- expands a mailing list.
     * @param {string} address the mailing list to expand
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    expn(address, callback) {
        this.command(`expn ${address}`, callback);
    }
    /**
     * @public
     * @description Calls this.ehlo() and, if an error occurs, this.helo().
     *
     * If there has been no previous EHLO or HELO command self session, self
     * method tries ESMTP EHLO first.
     *
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} [domain] the domain to associate with the command
     * @returns {void}
     */
    ehlo_or_helo_if_needed(callback, domain) {
        // is this code callable...?
        if (!this.features) {
            const response = (err, data) => caller(callback, err, data);
            this.ehlo((err, data) => {
                if (err) {
                    this.helo(response, domain);
                }
                else {
                    caller(callback, err, data);
                }
            }, domain);
        }
    }
    /**
     * @public
     *
     * Log in on an SMTP server that requires authentication.
     *
     * If there has been no previous EHLO or HELO command self session, self
     * method tries ESMTP EHLO first.
     *
     * This method will return normally if the authentication was successful.
     *
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} [user] the username to authenticate with
     * @param {string} [password] the password for the authentication
     * @param {{ method: string, domain: string }} [options] login options
     * @returns {void}
     */
    login(callback, user, password, options = {}) {
        var _a, _b;
        const login = {
            user: user ? () => user : this.user,
            password: password ? () => password : this.password,
            method: (_b = (_a = options === null || options === void 0 ? void 0 : options.method) === null || _a === void 0 ? void 0 : _a.toUpperCase()) !== null && _b !== void 0 ? _b : '',
        };
        const domain = (options === null || options === void 0 ? void 0 : options.domain) || this.domain;
        const initiate = (err, data) => {
            var _a;
            if (err) {
                caller(callback, err);
                return;
            }
            let method = null;
            /**
             * @param {string} challenge challenge
             * @returns {string} base64 cram hash
             */
            const encodeCramMd5 = (challenge) => {
                const hmac = crypto.createHmac('md5', login.password());
                hmac.update(Buffer.from(challenge, 'base64').toString('ascii'));
                return Buffer.from(`${login.user()} ${hmac.digest('hex')}`).toString('base64');
            };
            /**
             * @returns {string} base64 login/password
             */
            const encodePlain = () => Buffer.from(`\u0000${login.user()}\u0000${login.password()}`).toString('base64');
            /**
             * @see https://developers.google.com/gmail/xoauth2_protocol
             * @returns {string} base64 xoauth2 auth token
             */
            const encodeXoauth2 = () => Buffer.from(`user=${login.user()}\u0001auth=Bearer ${login.password()}\u0001\u0001`).toString('base64');
            // List of authentication methods we support: from preferred to
            // less preferred methods.
            if (!method) {
                const preferred = this.authentication;
                let auth = '';
                if (typeof ((_a = this.features) === null || _a === void 0 ? void 0 : _a['auth']) === 'string') {
                    auth = this.features['auth'];
                }
                for (let i = 0; i < preferred.length; i++) {
                    if (auth.includes(preferred[i])) {
                        method = preferred[i];
                        break;
                    }
                }
            }
            /**
             * handle bad responses from command differently
             * @param {Error} err err
             * @param {unknown} data data
             * @returns {void}
             */
            const failed = (err, data) => {
                this.loggedin = false;
                this.close(); // if auth is bad, close the connection, it won't get better by itself
                caller(callback, SMTPError.create('authorization.failed', SMTPErrorStates.AUTHFAILED, err, data));
            };
            /**
             * @param {Error} err err
             * @param {unknown} data data
             * @returns {void}
             */
            const response = (err, data) => {
                if (err) {
                    failed(err, data);
                }
                else {
                    this.loggedin = true;
                    caller(callback, err, data);
                }
            };
            /**
             * @param {Error} err err
             * @param {unknown} data data
             * @param {string} msg msg
             * @returns {void}
             */
            const attempt = (err, data, msg) => {
                if (err) {
                    failed(err, data);
                }
                else {
                    if (method === AUTH_METHODS['CRAM-MD5']) {
                        this.command(encodeCramMd5(msg), response, [235, 503]);
                    }
                    else if (method === AUTH_METHODS.LOGIN) {
                        this.command(Buffer.from(login.password()).toString('base64'), response, [235, 503]);
                    }
                }
            };
            /**
             * @param {Error} err err
             * @param {unknown} data data
             * @param {string} msg msg
             * @returns {void}
             */
            const attemptUser = (err, data) => {
                if (err) {
                    failed(err, data);
                }
                else {
                    if (method === AUTH_METHODS.LOGIN) {
                        this.command(Buffer.from(login.user()).toString('base64'), attempt, [334]);
                    }
                }
            };
            switch (method) {
                case AUTH_METHODS['CRAM-MD5']:
                    this.command(`AUTH  ${AUTH_METHODS['CRAM-MD5']}`, attempt, [334]);
                    break;
                case AUTH_METHODS.LOGIN:
                    this.command(`AUTH ${AUTH_METHODS.LOGIN}`, attemptUser, [334]);
                    break;
                case AUTH_METHODS.PLAIN:
                    this.command(`AUTH ${AUTH_METHODS.PLAIN} ${encodePlain()}`, response, [235, 503]);
                    break;
                case AUTH_METHODS.XOAUTH2:
                    this.command(`AUTH ${AUTH_METHODS.XOAUTH2} ${encodeXoauth2()}`, response, [235, 503]);
                    break;
                default:
                    caller(callback, SMTPError.create('no form of authorization supported', SMTPErrorStates.AUTHNOTSUPPORTED, null, data));
                    break;
            }
        };
        this.ehlo_or_helo_if_needed(initiate, domain);
    }
    /**
     * @public
     * @param {boolean} [force=false] whether or not to force destroy the connection
     * @returns {void}
     */
    close(force = false) {
        if (this.sock) {
            if (force) {
                this.log('smtp connection destroyed!');
                this.sock.destroy();
            }
            else {
                this.log('smtp connection closed.');
                this.sock.end();
            }
        }
        if (this.monitor) {
            this.monitor.stop();
            this.monitor = null;
        }
        this._state = SMTPState.NOTCONNECTED;
        this._secure = false;
        this.sock = null;
        this.features = null;
        this.loggedin = !(this.user() && this.password());
    }
    /**
     * @public
     * @param {function(...any[]): void} [callback] function to call after response
     * @returns {void}
     */
    quit(callback) {
        this.command('quit', (err, data) => {
            caller(callback, err, data);
            this.close();
        }, [221, 250]);
    }
}

class SMTPClient {
    /**
     * Create a standard SMTP client backed by a self-managed SMTP connection.
     *
     * NOTE: `host` is trimmed before being used to establish a connection; however, the original untrimmed value will still be visible in configuration.
     *
     * @param {SMTPConnectionOptions} server smtp options
     */
    constructor(server) {
        this.queue = [];
        this.sending = false;
        this.ready = false;
        this.timer = null;
        this.smtp = new SMTPConnection(server);
    }
    /**
     * @public
     * @param {Message} msg the message to send
     * @param {function(err: Error, msg: Message): void} callback .
     * @returns {void}
     */
    send(msg, callback) {
        const message = msg instanceof Message
            ? msg
            : this._canMakeMessage(msg)
                ? new Message(msg)
                : null;
        if (message == null) {
            callback(new Error('message is not a valid Message instance'), msg);
            return;
        }
        const { isValid, validationError } = message.checkValidity();
        if (isValid) {
            const stack = this.createMessageStack(message, callback);
            if (stack.to.length === 0) {
                return callback(new Error('No recipients found in message'), msg);
            }
            this.queue.push(stack);
            this._poll();
        }
        else {
            callback(new Error(validationError), msg);
        }
    }
    /**
     * @public
     * @param {Message} msg the message to send
     * @returns {Promise<Message>} a promise that resolves to the fully processed message
     */
    sendAsync(msg) {
        return new Promise((resolve, reject) => {
            this.send(msg, (err, msg) => {
                if (err != null) {
                    reject(err);
                }
                else {
                    resolve(msg);
                }
            });
        });
    }
    /**
     * @public
     * @description Converts a message to the raw object used by the internal stack.
     * @param {Message} message message to convert
     * @param {function(err: Error, msg: Message): void} callback errback
     * @returns {MessageStack} raw message object
     */
    createMessageStack(message, callback = function () {
        /* ø */
    }) {
        const [{ address: from }] = addressparser(message.header.from);
        const stack = {
            message,
            to: [],
            from,
            callback: callback.bind(this),
        };
        const { header: { to, cc, bcc, 'return-path': returnPath }, } = message;
        if ((typeof to === 'string' || Array.isArray(to)) && to.length > 0) {
            stack.to = addressparser(to);
        }
        if ((typeof cc === 'string' || Array.isArray(cc)) && cc.length > 0) {
            stack.to = stack.to.concat(addressparser(cc).filter((x) => stack.to.some((y) => y.address === x.address) === false));
        }
        if ((typeof bcc === 'string' || Array.isArray(bcc)) && bcc.length > 0) {
            stack.to = stack.to.concat(addressparser(bcc).filter((x) => stack.to.some((y) => y.address === x.address) === false));
        }
        if (typeof returnPath === 'string' && returnPath.length > 0) {
            const parsedReturnPath = addressparser(returnPath);
            if (parsedReturnPath.length > 0) {
                const [{ address: returnPathAddress }] = parsedReturnPath;
                stack.returnPath = returnPathAddress;
            }
        }
        return stack;
    }
    /**
     * @protected
     * @returns {void}
     */
    _poll() {
        if (this.timer != null) {
            clearTimeout(this.timer);
        }
        if (this.queue.length) {
            if (this.smtp.state() == SMTPState.NOTCONNECTED) {
                this._connect(this.queue[0]);
            }
            else if (this.smtp.state() == SMTPState.CONNECTED &&
                !this.sending &&
                this.ready) {
                this._sendmail(this.queue.shift());
            }
        }
        // wait around 1 seconds in case something does come in,
        // otherwise close out SMTP connection if still open
        else if (this.smtp.state() == SMTPState.CONNECTED) {
            this.timer = setTimeout(() => this.smtp.quit(), 1000);
        }
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _connect(stack) {
        /**
         * @param {Error} err callback error
         * @returns {void}
         */
        const connect = (err) => {
            if (!err) {
                const begin = (err) => {
                    if (!err) {
                        this.ready = true;
                        this._poll();
                    }
                    else {
                        stack.callback(err, stack.message);
                        // clear out the queue so all callbacks can be called with the same error message
                        this.queue.shift();
                        this._poll();
                    }
                };
                if (!this.smtp.authorized()) {
                    this.smtp.login(begin);
                }
                else {
                    this.smtp.ehlo_or_helo_if_needed(begin);
                }
            }
            else {
                stack.callback(err, stack.message);
                // clear out the queue so all callbacks can be called with the same error message
                this.queue.shift();
                this._poll();
            }
        };
        this.ready = false;
        this.smtp.connect(connect);
    }
    /**
     * @protected
     * @param {MessageStack} msg message stack
     * @returns {boolean} can make message
     */
    _canMakeMessage(msg) {
        return (msg.from &&
            (msg.to || msg.cc || msg.bcc) &&
            (msg.text !== undefined || this._containsInlinedHtml(msg.attachment)));
    }
    /**
     * @protected
     * @param {MessageAttachment | MessageAttachment[]} attachment attachment
     * @returns {boolean} whether the attachment contains inlined html
     */
    _containsInlinedHtml(attachment) {
        if (Array.isArray(attachment)) {
            return attachment.some((att) => {
                return this._isAttachmentInlinedHtml(att);
            });
        }
        else {
            return this._isAttachmentInlinedHtml(attachment);
        }
    }
    /**
     * @protected
     * @param {MessageAttachment} attachment attachment
     * @returns {boolean} whether the attachment is inlined html
     */
    _isAttachmentInlinedHtml(attachment) {
        return (attachment &&
            (attachment.data || attachment.path) &&
            attachment.alternative === true);
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @param {function(MessageStack): void} next next
     * @returns {function(Error): void} callback
     */
    _sendsmtp(stack, next) {
        /**
         * @param {Error} [err] error
         * @returns {void}
         */
        return (err) => {
            if (!err && next) {
                next.apply(this, [stack]);
            }
            else {
                // if we snag on SMTP commands, call done, passing the error
                // but first reset SMTP state so queue can continue polling
                this.smtp.rset(() => this._senddone(err, stack));
            }
        };
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _sendmail(stack) {
        const from = stack.returnPath || stack.from;
        this.sending = true;
        this.smtp.mail(this._sendsmtp(stack, this._sendrcpt), '<' + from + '>');
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _sendrcpt(stack) {
        var _a;
        if (stack.to == null || typeof stack.to === 'string') {
            throw new TypeError('stack.to must be array');
        }
        const to = (_a = stack.to.shift()) === null || _a === void 0 ? void 0 : _a.address;
        this.smtp.rcpt(this._sendsmtp(stack, stack.to.length ? this._sendrcpt : this._senddata), `<${to}>`);
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _senddata(stack) {
        this.smtp.data(this._sendsmtp(stack, this._sendmessage));
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _sendmessage(stack) {
        const stream = stack.message.stream();
        stream.on('data', (data) => this.smtp.message(data));
        stream.on('end', () => {
            this.smtp.data_end(this._sendsmtp(stack, () => this._senddone(null, stack)));
        });
        // there is no way to cancel a message while in the DATA portion,
        // so we have to close the socket to prevent a bad email from going out
        stream.on('error', (err) => {
            this.smtp.close();
            this._senddone(err, stack);
        });
    }
    /**
     * @protected
     * @param {Error} err err
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _senddone(err, stack) {
        this.sending = false;
        stack.callback(err, stack.message);
        this._poll();
    }
}

exports.AUTH_METHODS = AUTH_METHODS;
exports.BUFFERSIZE = BUFFERSIZE;
exports.DEFAULT_TIMEOUT = DEFAULT_TIMEOUT;
exports.MIME64CHUNK = MIME64CHUNK;
exports.MIMECHUNK = MIMECHUNK;
exports.Message = Message;
exports.SMTPClient = SMTPClient;
exports.SMTPConnection = SMTPConnection;
exports.SMTPError = SMTPError;
exports.SMTPErrorStates = SMTPErrorStates;
exports.SMTPResponseMonitor = SMTPResponseMonitor;
exports.SMTPState = SMTPState;
exports.addressparser = addressparser;
exports.getRFC2822Date = getRFC2822Date;
exports.getRFC2822DateUTC = getRFC2822DateUTC;
exports.isRFC2822Date = isRFC2822Date;
exports.mimeEncode = mimeEncode;
exports.mimeWordEncode = mimeWordEncode;
//# sourceMappingURL=email.cjs.map

Texto modificado

Abrir archivo

import { existsSync, open, read, closeSync, close } from 'fs';
import { hostname } from 'os';
import { Stream } from 'stream';
import { TextEncoder, TextDecoder } from 'util';
import { createHmac } from 'crypto';
import { EventEmitter } from 'events';
import { Socket } from 'net';
import { connect, TLSSocket, createSecureContext } from 'tls';

/**
 * @param {Date} [date] an optional date to convert to RFC2822 format
 * @param {boolean} [useUtc] whether to parse the date as UTC (default: false)
 * @returns {string} the converted date
 */
function getRFC2822Date(date = new Date(), useUtc = false) {
    if (useUtc) {
        return getRFC2822DateUTC(date);
    }
    const dates = date
        .toString()
        .replace('GMT', '')
        .replace(/\s$.*$$/, '')
        .split(' ');
    dates[0] = dates[0] + ',';
    const day = dates[1];
    dates[1] = dates[2];
    dates[2] = day;
    return dates.join(' ');
}
/**
 * @param {Date} [date] an optional date to convert to RFC2822 format (UTC)
 * @returns {string} the converted date
 */
function getRFC2822DateUTC(date = new Date()) {
    const dates = date.toUTCString().split(' ');
    dates.pop(); // remove timezone
    dates.push('+0000');
    return dates.join(' ');
}
/**
 * RFC 2822 regex
 * @see https://tools.ietf.org/html/rfc2822#section-3.3
 * @see https://github.com/moment/moment/blob/a831fc7e2694281ce31e4f090bbcf90a690f0277/src/lib/create/from-string.js#L101
 */
const rfc2822re = /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),?\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|([+-]\d{4}))$/;
/**
 * @param {string} [date] a string to check for conformance to the [rfc2822](https://tools.ietf.org/html/rfc2822#section-3.3) standard
 * @returns {boolean} the result of the conformance check
 */
function isRFC2822Date(date) {
    return rfc2822re.test(date);
}

// adapted from https://github.com/emailjs/emailjs-mime-codec/blob/6909c706b9f09bc0e5c3faf48f723cca53e5b352/src/mimecodec.js
const encoder = new TextEncoder();
/**
 * @see https://tools.ietf.org/html/rfc2045#section-6.7
 */
const RANGES = [
    [0x09],
    [0x0a],
    [0x0d],
    [0x20, 0x3c],
    [0x3e, 0x7e], // >?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}
];
const LOOKUP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');
const MAX_CHUNK_LENGTH = 16383; // must be multiple of 3
const MAX_MIME_WORD_LENGTH = 52;
const MAX_B64_MIME_WORD_BYTE_LENGTH = 39;
function tripletToBase64(num) {
    return (LOOKUP[(num >> 18) & 0x3f] +
        LOOKUP[(num >> 12) & 0x3f] +
        LOOKUP[(num >> 6) & 0x3f] +
        LOOKUP[num & 0x3f]);
}
function encodeChunk(uint8, start, end) {
    let output = '';
    for (let i = start; i < end; i += 3) {
        output += tripletToBase64((uint8[i] << 16) + (uint8[i + 1] << 8) + uint8[i + 2]);
    }
    return output;
}
function encodeBase64(data) {
    const len = data.length;
    const extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes
    let output = '';
    // go through the array every three bytes, we'll deal with trailing stuff later
    for (let i = 0, len2 = len - extraBytes; i < len2; i += MAX_CHUNK_LENGTH) {
        output += encodeChunk(data, i, i + MAX_CHUNK_LENGTH > len2 ? len2 : i + MAX_CHUNK_LENGTH);
    }
    // pad the end with zeros, but make sure to not forget the extra bytes
    if (extraBytes === 1) {
        const tmp = data[len - 1];
        output += LOOKUP[tmp >> 2];
        output += LOOKUP[(tmp << 4) & 0x3f];
        output += '==';
    }
    else if (extraBytes === 2) {
        const tmp = (data[len - 2] << 8) + data[len - 1];
        output += LOOKUP[tmp >> 10];
        output += LOOKUP[(tmp >> 4) & 0x3f];
        output += LOOKUP[(tmp << 2) & 0x3f];
        output += '=';
    }
    return output;
}
/**
 * Splits a mime encoded string. Needed for dividing mime words into smaller chunks
 *
 * @param {string} str Mime encoded string to be split up
 * @param {number} maxlen Maximum length of characters for one part (minimum 12)
 * @return {string[]} lines
 */
function splitMimeEncodedString(str, maxlen = 12) {
    const minWordLength = 12; // require at least 12 symbols to fit possible 4 octet UTF-8 sequences
    const maxWordLength = Math.max(maxlen, minWordLength);
    const lines = [];
    while (str.length) {
        let curLine = str.substr(0, maxWordLength);
        const match = curLine.match(/=[0-9A-F]?$/i); // skip incomplete escaped char
        if (match) {
            curLine = curLine.substr(0, match.index);
        }
        let done = false;
        while (!done) {
            let chr;
            done = true;
            const match = str.substr(curLine.length).match(/^=([0-9A-F]{2})/i); // check if not middle of a unicode char sequence
            if (match) {
                chr = parseInt(match[1], 16);
                // invalid sequence, move one char back anc recheck
                if (chr < 0xc2 && chr > 0x7f) {
                    curLine = curLine.substr(0, curLine.length - 3);
                    done = false;
                }
            }
        }
        if (curLine.length) {
            lines.push(curLine);
        }
        str = str.substr(curLine.length);
    }
    return lines;
}
/**
 *
 * @param {number} nr number
 * @returns {boolean} if number is in range
 */
function checkRanges(nr) {
    return RANGES.reduce((val, range) => val ||
        (range.length === 1 && nr === range[0]) ||
        (range.length === 2 && nr >= range[0] && nr <= range[1]), false);
}
/**
 * Encodes all non printable and non ascii bytes to =XX form, where XX is the
 * byte value in hex. This function does not convert linebreaks etc. it
 * only escapes character sequences
 *
 * NOTE: Encoding support depends on util.TextDecoder, which is severely limited
 * prior to Node.js 13.
 *
 * @see https://nodejs.org/api/util.html#util_whatwg_supported_encodings
 * @see https://github.com/nodejs/node/issues/19214
 *
 * @param {string|Uint8Array} data Either a string or an Uint8Array
 * @param {string} encoding WHATWG supported encoding
 * @return {string} Mime encoded string
 */
function mimeEncode(data = '', encoding = 'utf-8') {
    const decoder = new TextDecoder(encoding);
    const buffer = typeof data === 'string'
        ? encoder.encode(data)
        : encoder.encode(decoder.decode(data));
    return buffer.reduce((aggregate, ord, index) => checkRanges(ord) &&
        !((ord === 0x20 || ord === 0x09) &&
            (index === buffer.length - 1 ||
                buffer[index + 1] === 0x0a ||
                buffer[index + 1] === 0x0d))
        ? // if the char is in allowed range, then keep as is, unless it is a ws in the end of a line
            aggregate + String.fromCharCode(ord)
        : `${aggregate}=${ord < 0x10 ? '0' : ''}${ord
            .toString(16)
            .toUpperCase()}`, '');
}
/**
 * Encodes a string or an Uint8Array to an UTF-8 MIME Word
 *
 * NOTE: Encoding support depends on util.TextDecoder, which is severely limited
 * prior to Node.js 13.
 *
 * @see https://tools.ietf.org/html/rfc2047
 * @see https://nodejs.org/api/util.html#util_whatwg_supported_encodings
 * @see https://github.com/nodejs/node/issues/19214
 *
 * @param {string|Uint8Array} data String to be encoded
 * @param {'Q' | 'B'} mimeWordEncoding='Q' Encoding for the mime word, either Q or B
 * @param {string} encoding WHATWG supported encoding
 * @return {string} Single or several mime words joined together
 */
function mimeWordEncode(data, mimeWordEncoding = 'Q', encoding = 'utf-8') {
    let parts = [];
    const decoder = new TextDecoder(encoding);
    const str = typeof data === 'string' ? data : decoder.decode(data);
    if (mimeWordEncoding === 'Q') {
        const encodedStr = mimeEncode(str, encoding).replace(/[^a-z0-9!*+\-/=]/gi, (chr) => chr === ' '
            ? '_'
            : '=' +
                (chr.charCodeAt(0) < 0x10 ? '0' : '') +
                chr.charCodeAt(0).toString(16).toUpperCase());
        parts =
            encodedStr.length < MAX_MIME_WORD_LENGTH
                ? [encodedStr]
                : splitMimeEncodedString(encodedStr, MAX_MIME_WORD_LENGTH);
    }
    else {
        // Fits as much as possible into every line without breaking utf-8 multibyte characters' octets up across lines
        let j = 0;
        let i = 0;
        while (i < str.length) {
            if (encoder.encode(str.substring(j, i)).length >
                MAX_B64_MIME_WORD_BYTE_LENGTH) {
                // we went one character too far, substring at the char before
                parts.push(str.substring(j, i - 1));
                j = i - 1;
            }
            else {
                i++;
            }
        }
        // add the remainder of the string
        str.substring(j) && parts.push(str.substring(j));
        parts = parts.map((x) => encoder.encode(x)).map((x) => encodeBase64(x));
    }
    return parts
        .map((p) => `=?UTF-8?${mimeWordEncoding}?${p}?= `)
        .join('')
        .trim();
}

/**
 * @readonly
 * @enum
 */
const AUTH_METHODS = {
    PLAIN: 'PLAIN',
    'CRAM-MD5': 'CRAM-MD5',
    LOGIN: 'LOGIN',
    XOAUTH2: 'XOAUTH2',
};
/**
 * @readonly
 * @enum
 */
const SMTPState = {
    NOTCONNECTED: 0,
    CONNECTING: 1,
    CONNECTED: 2,
};
const DEFAULT_TIMEOUT = 5000;
const SMTP_PORT = 25;
const SMTP_SSL_PORT = 465;
const SMTP_TLS_PORT = 587;
const CRLF = '\r\n';
const GREYLIST_DELAY = 300;
let DEBUG = 0;
/**
 * @param {...any[]} args the message(s) to log
 * @returns {void}
 */
const log = (...args) => {
    if (DEBUG === 1) {
        args.forEach((d) => console.log(typeof d === 'object'
            ? d instanceof Error
                ? d.message
                : JSON.stringify(d)
            : d));
    }
};
/**
 * @param {function(...any[]): void} callback the function to call
 * @param {...any[]} args the arguments to apply to the function
 * @returns {void}
 */
const caller = (callback, ...args) => {
    if (typeof callback === 'function') {
        callback(...args);
    }
};
class SMTPConnection extends EventEmitter {
    /**
     * SMTP class written using python's (2.7) smtplib.py as a base.
     *
     * To target a Message Transfer Agent (MTA), omit all options.
     *
     * NOTE: `host` is trimmed before being used to establish a connection; however, the original untrimmed value will still be visible in configuration.
     */
    constructor({ timeout, host, user, password, domain, port, ssl, tls, logger, authentication, } = {}) {
        var _a;
        super();
        this.timeout = DEFAULT_TIMEOUT;
        this.log = log;
        this.authentication = [
            AUTH_METHODS['CRAM-MD5'],
            AUTH_METHODS.LOGIN,
            AUTH_METHODS.PLAIN,
            AUTH_METHODS.XOAUTH2,
        ];
        this._state = SMTPState.NOTCONNECTED;
        this._secure = false;
        this.loggedin = false;
        this.sock = null;
        this.features = null;
        this.monitor = null;
        this.domain = hostname();
        this.host = 'localhost';
        this.ssl = false;
        this.tls = false;
        this.greylistResponseTracker = new WeakSet();
        if (Array.isArray(authentication)) {
            this.authentication = authentication;
        }
        if (typeof timeout === 'number') {
            this.timeout = timeout;
        }
        if (typeof domain === 'string') {
            this.domain = domain;
        }
        if (typeof host === 'string') {
            this.host = host;
        }
        if (ssl != null &&
            (typeof ssl === 'boolean' ||
                (typeof ssl === 'object' && Array.isArray(ssl) === false))) {
            this.ssl = ssl;
        }
        if (tls != null &&
            (typeof tls === 'boolean' ||
                (typeof tls === 'object' && Array.isArray(tls) === false))) {
            this.tls = tls;
        }
        this.port = port || (ssl ? SMTP_SSL_PORT : tls ? SMTP_TLS_PORT : SMTP_PORT);
        this.loggedin = user && password ? false : true;
        if (!user && ((_a = password === null || password === void 0 ? void 0 : password.length) !== null && _a !== void 0 ? _a : 0) > 0) {
            throw new Error('`password` cannot be set without `user`');
        }
        // keep these strings hidden when quicky debugging/logging
        this.user = () => user;
        this.password = () => password;
        if (typeof logger === 'function') {
            this.log = log;
        }
    }
    /**
     * @public
     * @param {0 | 1} level -
     * @returns {void}
     */
    debug(level) {
        DEBUG = level;
    }
    /**
     * @public
     * @returns {SMTPState} the current state
     */
    state() {
        return this._state;
    }
    /**
     * @public
     * @returns {boolean} whether or not the instance is authorized
     */
    authorized() {
        return this.loggedin;
    }
    /**
     * Establish an SMTP connection.
     *
     * NOTE: `host` is trimmed before being used to establish a connection; however, the original untrimmed value will still be visible in configuration.
     *
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {number} [port] the port to use for the connection
     * @param {string} [host] the hostname to use for the connection
     * @param {ConnectOptions} [options={}] the options
     * @returns {void}
     */
    connect(callback, port = this.port, host = this.host, options = {}) {
        this.port = port;
        this.host = host;
        this.ssl = options.ssl || this.ssl;
        if (this._state !== SMTPState.NOTCONNECTED) {
            this.quit(() => this.connect(callback, port, host, options));
        }
        /**
         * @returns {void}
         */
        const connected = () => {
            this.log(`connected: ${this.host}:${this.port}`);
            if (this.ssl && !this.tls) {
                // if key/ca/cert was passed in, check if connection is authorized
                if (typeof this.ssl !== 'boolean' &&
                    this.sock instanceof TLSSocket &&
                    !this.sock.authorized) {
                    this.close(true);
                    caller(callback, SMTPError.create('could not establish an ssl connection', SMTPErrorStates.CONNECTIONAUTH));
                }
                else {
                    this._secure = true;
                }
            }
        };
        /**
         * @param {Error} err err
         * @returns {void}
         */
        const connectedErrBack = (err) => {
            if (!err) {
                connected();
            }
            else {
                this.close(true);
                this.log(err);
                caller(callback, SMTPError.create('could not connect', SMTPErrorStates.COULDNOTCONNECT, err));
            }
        };
        const response = (err, msg) => {
            if (err) {
                if (this._state === SMTPState.NOTCONNECTED && !this.sock) {
                    return;
                }
                this.close(true);
                caller(callback, err);
            }
            else if (msg.code == '220') {
                this.log(msg.data);
                // might happen first, so no need to wait on connected()
                this._state = SMTPState.CONNECTED;
                caller(callback, null, msg.data);
            }
            else {
                this.log(`response (data): ${msg.data}`);
                this.quit(() => {
                    caller(callback, SMTPError.create('bad response on connection', SMTPErrorStates.BADRESPONSE, err, msg.data));
                });
            }
        };
        this._state = SMTPState.CONNECTING;
        this.log(`connecting: ${this.host}:${this.port}`);
        if (this.ssl) {
            this.sock = connect(this.port, this.host.trim(), typeof this.ssl === 'object' ? this.ssl : {}, connected);
        }
        else {
            this.sock = new Socket();
            this.sock.connect(this.port, this.host.trim(), connectedErrBack);
        }
        this.monitor = new SMTPResponseMonitor(this.sock, this.timeout, () => this.close(true));
        this.sock.once('response', response);
        this.sock.once('error', response); // the socket could reset or throw, so let's handle it and let the user know
    }
    /**
     * @public
     * @param {string} str the string to send
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    send(str, callback) {
        if (this.sock != null && this._state === SMTPState.CONNECTED) {
            this.log(str);
            this.sock.once('response', (err, msg) => {
                if (err) {
                    caller(callback, err);
                }
                else {
                    this.log(msg.data);
                    caller(callback, null, msg);
                }
            });
            if (this.sock.writable) {
                this.sock.write(str);
            }
        }
        else {
            this.close(true);
            caller(callback, SMTPError.create('no connection has been established', SMTPErrorStates.NOCONNECTION));
        }
    }
    /**
     * @public
     * @param {string} cmd command to issue
     * @param {function(...any[]): void} callback function to call after response
     * @param {(number[] | number)} [codes=[250]] array codes
     * @returns {void}
     */
    command(cmd, callback, codes = [250]) {
        const codesArray = Array.isArray(codes)
            ? codes
            : typeof codes === 'number'
                ? [codes]
                : [250];
        const response = (err, msg) => {
            if (err) {
                caller(callback, err);
            }
            else {
                const code = Number(msg.code);
                if (codesArray.indexOf(code) !== -1) {
                    caller(callback, err, msg.data, msg.message);
                }
                else if ((code === 450 || code === 451) &&
                    msg.message.toLowerCase().includes('greylist') &&
                    this.greylistResponseTracker.has(response) === false) {
                    this.greylistResponseTracker.add(response);
                    setTimeout(() => {
                        this.send(cmd + CRLF, response);
                    }, GREYLIST_DELAY);
                }
                else {
                    const suffix = msg.message ? `: ${msg.message}` : '';
                    const errorMessage = `bad response on command '${cmd.split(' ')[0]}'${suffix}`;
                    caller(callback, SMTPError.create(errorMessage, SMTPErrorStates.BADRESPONSE, null, msg.data));
                }
            }
        };
        this.greylistResponseTracker.delete(response);
        this.send(cmd + CRLF, response);
    }
    /**
     * @public
     * @description SMTP 'helo' command.
     *
     * Hostname to send for self command defaults to the FQDN of the local
     * host.
     *
     * As this command was deprecated by rfc2821, it should only be used for compatibility with non-compliant servers.
     * @see https://tools.ietf.org/html/rfc2821#appendix-F.3
     *
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} domain the domain to associate with the 'helo' request
     * @returns {void}
     */
    helo(callback, domain) {
        this.command(`helo ${domain || this.domain}`, (err, data) => {
            if (err) {
                caller(callback, err);
            }
            else {
                this.parse_smtp_features(data);
                caller(callback, err, data);
            }
        });
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    starttls(callback) {
        const response = (err, msg) => {
            if (this.sock == null) {
                throw new Error('null socket');
            }
            if (err) {
                err.message += ' while establishing a starttls session';
                caller(callback, err);
            }
            else {
                const secureContext = createSecureContext(typeof this.tls === 'object' ? this.tls : {});
                const secureSocket = new TLSSocket(this.sock, { secureContext });
                secureSocket.on('error', (err) => {
                    this.close(true);
                    caller(callback, err);
                });
                this._secure = true;
                this.sock = secureSocket;
                new SMTPResponseMonitor(this.sock, this.timeout, () => this.close(true));
                caller(callback, msg.data);
            }
        };
        this.command('starttls', response, [220]);
    }
    /**
     * @public
     * @param {string} data the string to parse for features
     * @returns {void}
     */
    parse_smtp_features(data) {
        //  According to RFC1869 some (badly written)
        //  MTA's will disconnect on an ehlo. Toss an exception if
        //  that happens -ddm
        data.split('\n').forEach((ext) => {
            const parse = ext.match(/^(?:\d+[-=]?)\s*?([^\s]+)(?:\s+(.*)\s*?)?$/);
            // To be able to communicate with as many SMTP servers as possible,
            // we have to take the old-style auth advertisement into account,
            // because:
            // 1) Else our SMTP feature parser gets confused.
            // 2) There are some servers that only advertise the auth methods we
            // support using the old style.
            if (parse != null && this.features != null) {
                // RFC 1869 requires a space between ehlo keyword and parameters.
                // It's actually stricter, in that only spaces are allowed between
                // parameters, but were not going to check for that here.  Note
                // that the space isn't present if there are no parameters.
                this.features[parse[1].toLowerCase()] = parse[2] || true;
            }
        });
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} domain the domain to associate with the 'ehlo' request
     * @returns {void}
     */
    ehlo(callback, domain) {
        this.features = {};
        this.command(`ehlo ${domain || this.domain}`, (err, data) => {
            if (err) {
                caller(callback, err);
            }
            else {
                this.parse_smtp_features(data);
                if (this.tls && !this._secure) {
                    this.starttls(() => this.ehlo(callback, domain));
                }
                else {
                    caller(callback, err, data);
                }
            }
        });
    }
    /**
     * @public
     * @param {string} opt the features keyname to check
     * @returns {boolean} whether the extension exists
     */
    has_extn(opt) {
        var _a;
        return ((_a = this.features) !== null && _a !== void 0 ? _a : {})[opt.toLowerCase()] === undefined;
    }
    /**
     * @public
     * @description SMTP 'help' command, returns text from the server
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} domain the domain to associate with the 'help' request
     * @returns {void}
     */
    help(callback, domain) {
        this.command(domain ? `help ${domain}` : 'help', callback, [211, 214]);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    rset(callback) {
        this.command('rset', callback);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    noop(callback) {
        this.send('noop', callback);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} from the sender
     * @returns {void}
     */
    mail(callback, from) {
        this.command(`mail FROM:${from}`, callback);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} to the receiver
     * @returns {void}
     */
    rcpt(callback, to) {
        this.command(`RCPT TO:${to}`, callback, [250, 251]);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    data(callback) {
        this.command('data', callback, [354]);
    }
    /**
     * @public
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    data_end(callback) {
        this.command(`${CRLF}.`, callback);
    }
    /**
     * @public
     * @param {string} data the message to send
     * @returns {void}
     */
    message(data) {
        var _a, _b;
        this.log(data);
        (_b = (_a = this.sock) === null || _a === void 0 ? void 0 : _a.write(data)) !== null && _b !== void 0 ? _b : this.log('no socket to write to');
    }
    /**
     * @public
     * @description SMTP 'verify' command -- checks for address validity.
     * @param {string} address the address to validate
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    verify(address, callback) {
        this.command(`vrfy ${address}`, callback, [250, 251, 252]);
    }
    /**
     * @public
     * @description SMTP 'expn' command -- expands a mailing list.
     * @param {string} address the mailing list to expand
     * @param {function(...any[]): void} callback function to call after response
     * @returns {void}
     */
    expn(address, callback) {
        this.command(`expn ${address}`, callback);
    }
    /**
     * @public
     * @description Calls this.ehlo() and, if an error occurs, this.helo().
     *
     * If there has been no previous EHLO or HELO command self session, self
     * method tries ESMTP EHLO first.
     *
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} [domain] the domain to associate with the command
     * @returns {void}
     */
    ehlo_or_helo_if_needed(callback, domain) {
        // is this code callable...?
        if (!this.features) {
            const response = (err, data) => caller(callback, err, data);
            this.ehlo((err, data) => {
                if (err) {
                    this.helo(response, domain);
                }
                else {
                    caller(callback, err, data);
                }
            }, domain);
        }
    }
    /**
     * @public
     *
     * Log in on an SMTP server that requires authentication.
     *
     * If there has been no previous EHLO or HELO command self session, self
     * method tries ESMTP EHLO first.
     *
     * This method will return normally if the authentication was successful.
     *
     * @param {function(...any[]): void} callback function to call after response
     * @param {string} [user] the username to authenticate with
     * @param {string} [password] the password for the authentication
     * @param {{ method: string, domain: string }} [options] login options
     * @returns {void}
     */
    login(callback, user, password, options = {}) {
        var _a, _b;
        const login = {
            user: user ? () => user : this.user,
            password: password ? () => password : this.password,
            method: (_b = (_a = options === null || options === void 0 ? void 0 : options.method) === null || _a === void 0 ? void 0 : _a.toUpperCase()) !== null && _b !== void 0 ? _b : '',
        };
        const domain = (options === null || options === void 0 ? void 0 : options.domain) || this.domain;
        const initiate = (err, data) => {
            var _a;
            if (err) {
                caller(callback, err);
                return;
            }
            let method = null;
            /**
             * @param {string} challenge challenge
             * @returns {string} base64 cram hash
             */
            const encodeCramMd5 = (challenge) => {
                const hmac = createHmac('md5', login.password());
                hmac.update(Buffer.from(challenge, 'base64').toString('ascii'));
                return Buffer.from(`${login.user()} ${hmac.digest('hex')}`).toString('base64');
            };
            /**
             * @returns {string} base64 login/password
             */
            const encodePlain = () => Buffer.from(`\u0000${login.user()}\u0000${login.password()}`).toString('base64');
            /**
             * @see https://developers.google.com/gmail/xoauth2_protocol
             * @returns {string} base64 xoauth2 auth token
             */
            const encodeXoauth2 = () => Buffer.from(`user=${login.user()}\u0001auth=Bearer ${login.password()}\u0001\u0001`).toString('base64');
            // List of authentication methods we support: from preferred to
            // less preferred methods.
            if (!method) {
                const preferred = this.authentication;
                let auth = '';
                if (typeof ((_a = this.features) === null || _a === void 0 ? void 0 : _a['auth']) === 'string') {
                    auth = this.features['auth'];
                }
                for (let i = 0; i < preferred.length; i++) {
                    if (auth.includes(preferred[i])) {
                        method = preferred[i];
                        break;
                    }
                }
            }
            /**
             * handle bad responses from command differently
             * @param {Error} err err
             * @param {unknown} data data
             * @returns {void}
             */
            const failed = (err, data) => {
                this.loggedin = false;
                this.close(); // if auth is bad, close the connection, it won't get better by itself
                caller(callback, SMTPError.create('authorization.failed', SMTPErrorStates.AUTHFAILED, err, data));
            };
            /**
             * @param {Error} err err
             * @param {unknown} data data
             * @returns {void}
             */
            const response = (err, data) => {
                if (err) {
                    failed(err, data);
                }
                else {
                    this.loggedin = true;
                    caller(callback, err, data);
                }
            };
            /**
             * @param {Error} err err
             * @param {unknown} data data
             * @param {string} msg msg
             * @returns {void}
             */
            const attempt = (err, data, msg) => {
                if (err) {
                    failed(err, data);
                }
                else {
                    if (method === AUTH_METHODS['CRAM-MD5']) {
                        this.command(encodeCramMd5(msg), response, [235, 503]);
                    }
                    else if (method === AUTH_METHODS.LOGIN) {
                        this.command(Buffer.from(login.password()).toString('base64'), response, [235, 503]);
                    }
                }
            };
            /**
             * @param {Error} err err
             * @param {unknown} data data
             * @param {string} msg msg
             * @returns {void}
             */
            const attemptUser = (err, data) => {
                if (err) {
                    failed(err, data);
                }
                else {
                    if (method === AUTH_METHODS.LOGIN) {
                        this.command(Buffer.from(login.user()).toString('base64'), attempt, [334]);
                    }
                }
            };
            switch (method) {
                case AUTH_METHODS['CRAM-MD5']:
                    this.command(`AUTH  ${AUTH_METHODS['CRAM-MD5']}`, attempt, [334]);
                    break;
                case AUTH_METHODS.LOGIN:
                    this.command(`AUTH ${AUTH_METHODS.LOGIN}`, attemptUser, [334]);
                    break;
                case AUTH_METHODS.PLAIN:
                    this.command(`AUTH ${AUTH_METHODS.PLAIN} ${encodePlain()}`, response, [235, 503]);
                    break;
                case AUTH_METHODS.XOAUTH2:
                    this.command(`AUTH ${AUTH_METHODS.XOAUTH2} ${encodeXoauth2()}`, response, [235, 503]);
                    break;
                default:
                    caller(callback, SMTPError.create('no form of authorization supported', SMTPErrorStates.AUTHNOTSUPPORTED, null, data));
                    break;
            }
        };
        this.ehlo_or_helo_if_needed(initiate, domain);
    }
    /**
     * @public
     * @param {boolean} [force=false] whether or not to force destroy the connection
     * @returns {void}
     */
    close(force = false) {
        if (this.sock) {
            if (force) {
                this.log('smtp connection destroyed!');
                this.sock.destroy();
            }
            else {
                this.log('smtp connection closed.');
                this.sock.end();
            }
        }
        if (this.monitor) {
            this.monitor.stop();
            this.monitor = null;
        }
        this._state = SMTPState.NOTCONNECTED;
        this._secure = false;
        this.sock = null;
        this.features = null;
        this.loggedin = !(this.user() && this.password());
    }
    /**
     * @public
     * @param {function(...any[]): void} [callback] function to call after response
     * @returns {void}
     */
    quit(callback) {
        this.command('quit', (err, data) => {
            caller(callback, err, data);
            this.close();
        }, [221, 250]);
    }
}

class SMTPClient {
    /**
     * Create a standard SMTP client backed by a self-managed SMTP connection.
     *
     * NOTE: `host` is trimmed before being used to establish a connection; however, the original untrimmed value will still be visible in configuration.
     *
     * @param {SMTPConnectionOptions} server smtp options
     */
    constructor(server) {
        this.queue = [];
        this.sending = false;
        this.ready = false;
        this.timer = null;
        this.smtp = new SMTPConnection(server);
    }
    /**
     * @public
     * @template {Message | MessageHeaders} T
     * @param {T} msg the message to send
     * @param {MessageCallback<T>} callback receiver for the error (if any) as well as the passed-in message / headers
     * @returns {void}
     */
    send(msg, callback) {
        const message = msg instanceof Message
            ? msg
            : this._canMakeMessage(msg)
                ? new Message(msg)
                : null;
        if (message == null) {
            callback(new Error('message is not a valid Message instance'), msg);
            return;
        }
        const { isValid, validationError } = message.checkValidity();
        if (isValid) {
            const stack = this.createMessageStack(message, callback);
            if (stack.to.length === 0) {
                return callback(new Error('No recipients found in message'), msg);
            }
            this.queue.push(stack);
            this._poll();
        }
        else {
            callback(new Error(validationError), msg);
        }
    }
    /**
     * @public
     * @template {Message | MessageHeaders} T
     * @param {T} msg the message to send
     * @returns {Promise<T>} a promise that resolves to the passed-in message / headers
     */
    sendAsync(msg) {
        return new Promise((resolve, reject) => {
            this.send(msg, (err, message) => {
                if (err != null) {
                    reject(err);
                }
                else {
                    // unfortunately, the conditional type doesn't reach here
                    // fortunately, we only return a `Message` when err is null, so this is safe
                    resolve(message);
                }
            });
        });
    }
    /**
     * @public
     * @description Converts a message to the raw object used by the internal stack.
     * @param {Message} message message to convert
     * @param {MessageCallback} callback errback
     * @returns {MessageStack} raw message object
     */
    createMessageStack(message, callback = function () {
        /* ø */
    }) {
        const [{ address: from }] = addressparser(message.header.from);
        const stack = {
            message,
            to: [],
            from,
            callback: callback.bind(this),
        };
        const { header: { to, cc, bcc, 'return-path': returnPath }, } = message;
        if ((typeof to === 'string' || Array.isArray(to)) && to.length > 0) {
            stack.to = addressparser(to);
        }
        if ((typeof cc === 'string' || Array.isArray(cc)) && cc.length > 0) {
            stack.to = stack.to.concat(addressparser(cc).filter((x) => stack.to.some((y) => y.address === x.address) === false));
        }
        if ((typeof bcc === 'string' || Array.isArray(bcc)) && bcc.length > 0) {
            stack.to = stack.to.concat(addressparser(bcc).filter((x) => stack.to.some((y) => y.address === x.address) === false));
        }
        if (typeof returnPath === 'string' && returnPath.length > 0) {
            const parsedReturnPath = addressparser(returnPath);
            if (parsedReturnPath.length > 0) {
                const [{ address: returnPathAddress }] = parsedReturnPath;
                stack.returnPath = returnPathAddress;
            }
        }
        return stack;
    }
    /**
     * @protected
     * @returns {void}
     */
    _poll() {
        if (this.timer != null) {
            clearTimeout(this.timer);
        }
        if (this.queue.length) {
            if (this.smtp.state() == SMTPState.NOTCONNECTED) {
                this._connect(this.queue[0]);
            }
            else if (this.smtp.state() == SMTPState.CONNECTED &&
                !this.sending &&
                this.ready) {
                this._sendmail(this.queue.shift());
            }
        }
        // wait around 1 seconds in case something does come in,
        // otherwise close out SMTP connection if still open
        else if (this.smtp.state() == SMTPState.CONNECTED) {
            this.timer = setTimeout(() => this.smtp.quit(), 1000);
        }
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _connect(stack) {
        /**
         * @param {Error} err callback error
         * @returns {void}
         */
        const connect = (err) => {
            if (!err) {
                const begin = (err) => {
                    if (!err) {
                        this.ready = true;
                        this._poll();
                    }
                    else {
                        stack.callback(err, stack.message);
                        // clear out the queue so all callbacks can be called with the same error message
                        this.queue.shift();
                        this._poll();
                    }
                };
                if (!this.smtp.authorized()) {
                    this.smtp.login(begin);
                }
                else {
                    this.smtp.ehlo_or_helo_if_needed(begin);
                }
            }
            else {
                stack.callback(err, stack.message);
                // clear out the queue so all callbacks can be called with the same error message
                this.queue.shift();
                this._poll();
            }
        };
        this.ready = false;
        this.smtp.connect(connect);
    }
    /**
     * @protected
     * @param {MessageStack} msg message stack
     * @returns {boolean} can make message
     */
    _canMakeMessage(msg) {
        return (msg.from &&
            (msg.to || msg.cc || msg.bcc) &&
            (msg.text !== undefined || this._containsInlinedHtml(msg.attachment)));
    }
    /**
     * @protected
     * @param {MessageAttachment | MessageAttachment[]} attachment attachment
     * @returns {boolean} whether the attachment contains inlined html
     */
    _containsInlinedHtml(attachment) {
        if (Array.isArray(attachment)) {
            return attachment.some((att) => {
                return this._isAttachmentInlinedHtml(att);
            });
        }
        else {
            return this._isAttachmentInlinedHtml(attachment);
        }
    }
    /**
     * @protected
     * @param {MessageAttachment} attachment attachment
     * @returns {boolean} whether the attachment is inlined html
     */
    _isAttachmentInlinedHtml(attachment) {
        return (attachment &&
            (attachment.data || attachment.path) &&
            attachment.alternative === true);
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @param {function(MessageStack): void} next next
     * @returns {function(Error): void} callback
     */
    _sendsmtp(stack, next) {
        /**
         * @param {Error} [err] error
         * @returns {void}
         */
        return (err) => {
            if (!err && next) {
                next.apply(this, [stack]);
            }
            else {
                // if we snag on SMTP commands, call done, passing the error
                // but first reset SMTP state so queue can continue polling
                this.smtp.rset(() => this._senddone(err, stack));
            }
        };
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _sendmail(stack) {
        const from = stack.returnPath || stack.from;
        this.sending = true;
        this.smtp.mail(this._sendsmtp(stack, this._sendrcpt), '<' + from + '>');
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _sendrcpt(stack) {
        var _a;
        if (stack.to == null || typeof stack.to === 'string') {
            throw new TypeError('stack.to must be array');
        }
        const to = (_a = stack.to.shift()) === null || _a === void 0 ? void 0 : _a.address;
        this.smtp.rcpt(this._sendsmtp(stack, stack.to.length ? this._sendrcpt : this._senddata), `<${to}>`);
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _senddata(stack) {
        this.smtp.data(this._sendsmtp(stack, this._sendmessage));
    }
    /**
     * @protected
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _sendmessage(stack) {
        const stream = stack.message.stream();
        stream.on('data', (data) => this.smtp.message(data));
        stream.on('end', () => {
            this.smtp.data_end(this._sendsmtp(stack, () => this._senddone(null, stack)));
        });
        // there is no way to cancel a message while in the DATA portion,
        // so we have to close the socket to prevent a bad email from going out
        stream.on('error', (err) => {
            this.smtp.close();
            this._senddone(err, stack);
        });
    }
    /**
     * @protected
     * @param {Error} err err
     * @param {MessageStack} stack stack
     * @returns {void}
     */
    _senddone(err, stack) {
        this.sending = false;
        stack.callback(err, stack.message);
        this._poll();
    }
}

export { AUTH_METHODS, BUFFERSIZE, DEFAULT_TIMEOUT, MIME64CHUNK, MIMECHUNK, Message, SMTPClient, SMTPConnection, SMTPError, SMTPErrorStates, SMTPResponseMonitor, SMTPState, addressparser, getRFC2822Date, getRFC2822DateUTC, isRFC2822Date, mimeEncode, mimeWordEncode };
//# sourceMappingURL=email.js.map