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Connection.js
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var tls = require('tls'),
Socket = require('net').Socket,
EventEmitter = require('events').EventEmitter,
inherits = require('util').inherits,
inspect = require('util').inspect,
isDate = require('util').isDate,
utf7 = require('utf7').imap;
var Parser = require('./Parser').Parser,
parseExpr = require('./Parser').parseExpr,
parseHeader = require('./Parser').parseHeader;
var MAX_INT = 9007199254740992,
KEEPALIVE_INTERVAL = 10000,
MAX_IDLE_WAIT = 300000, // 5 minutes
MONTHS = ['Jan', 'Feb', 'Mar',
'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep',
'Oct', 'Nov', 'Dec'],
FETCH_ATTR_MAP = {
'RFC822.SIZE': 'size',
'BODY': 'struct',
'BODYSTRUCTURE': 'struct',
'ENVELOPE': 'envelope',
'INTERNALDATE': 'date'
},
SPECIAL_USE_ATTRIBUTES = [
'\\All',
'\\Archive',
'\\Drafts',
'\\Flagged',
'\\Important',
'\\Junk',
'\\Sent',
'\\Trash'
],
CRLF = '\r\n',
RE_CMD = /^([^ ]+)(?: |$)/,
RE_UIDCMD_HASRESULTS = /^UID (?:FETCH|SEARCH|SORT)/,
RE_IDLENOOPRES = /^(IDLE|NOOP) /,
RE_OPENBOX = /^EXAMINE|SELECT$/,
RE_BODYPART = /^BODY\[/,
RE_INVALID_KW_CHARS = /[\(\)\{\\\"\]\%\*\x00-\x20\x7F]/,
RE_NUM_RANGE = /^(?:[\d]+|\*):(?:[\d]+|\*)$/,
RE_BACKSLASH = /\\/g,
RE_DBLQUOTE = /"/g,
RE_ESCAPE = /\\\\/g,
RE_INTEGER = /^\d+$/,
RE_PARTIAL_BODY = /^([A-Za-z]+)(<[0-9]+\.[0-9]+>)$/;
function Connection(config) {
if (!(this instanceof Connection))
return new Connection(config);
EventEmitter.call(this);
config || (config = {});
this._config = {
socket: config.socket,
socketTimeout: config.socketTimeout || 0,
host: config.host || 'localhost',
port: config.port || 143,
tls: config.tls,
tlsOptions: config.tlsOptions,
autotls: config.autotls,
user: config.user,
password: config.password,
xoauth: config.xoauth,
xoauth2: config.xoauth2,
connTimeout: config.connTimeout || 10000,
authTimeout: config.authTimeout || 5000,
keepalive: (config.keepalive === undefined || config.keepalive === null
? true
: config.keepalive)
};
this._sock = config.socket || undefined;
this._tagcount = 0;
this._tmrConn = undefined;
this._tmrKeepalive = undefined;
this._tmrAuth = undefined;
this._queue = [];
this._box = undefined;
this._idle = { started: undefined, enabled: false };
this._parser = undefined;
this._curReq = undefined;
this.delimiter = undefined;
this.namespaces = undefined;
this.state = 'disconnected';
this.debug = config.debug;
}
inherits(Connection, EventEmitter);
Connection.prototype.connect = function() {
var config = this._config,
self = this,
socket,
parser,
tlsOptions;
socket = config.socket || new Socket();
socket.setKeepAlive(true);
this._sock = undefined;
this._tagcount = 0;
this._tmrConn = undefined;
this._tmrKeepalive = undefined;
this._tmrAuth = undefined;
this._queue = [];
this._box = undefined;
this._idle = { started: undefined, enabled: false };
this._parser = undefined;
this._curReq = undefined;
this.delimiter = undefined;
this.namespaces = undefined;
this.state = 'disconnected';
if (config.tls) {
tlsOptions = {};
tlsOptions.host = config.host;
// Host name may be overridden the tlsOptions
for (var k in config.tlsOptions)
tlsOptions[k] = config.tlsOptions[k];
tlsOptions.socket = socket;
}
if (config.tls)
this._sock = tls.connect(tlsOptions, onconnect);
else {
socket.once('connect', onconnect);
this._sock = socket;
}
function onconnect() {
clearTimeout(self._tmrConn);
self.state = 'connected';
self.debug && self.debug('[connection] Connected to host');
self._tmrAuth = setTimeout(function() {
var err = new Error('Timed out while authenticating with server');
err.source = 'timeout-auth';
self.emit('error', err);
socket.destroy();
}, config.authTimeout);
}
this._onError = function(err) {
clearTimeout(self._tmrConn);
clearTimeout(self._tmrAuth);
self.debug && self.debug('[connection] Error: ' + err);
err.source = 'socket';
self.emit('error', err);
};
this._sock.on('error', this._onError);
this._onSocketTimeout = function() {
clearTimeout(self._tmrConn);
clearTimeout(self._tmrAuth);
clearTimeout(self._tmrKeepalive);
self.state = 'disconnected';
self.debug && self.debug('[connection] Socket timeout');
var err = new Error('Socket timed out while talking to server');
err.source = 'socket-timeout';
self.emit('error', err);
socket.destroy();
};
this._sock.on('timeout', this._onSocketTimeout);
socket.setTimeout(config.socketTimeout);
socket.once('close', function(had_err) {
clearTimeout(self._tmrConn);
clearTimeout(self._tmrAuth);
clearTimeout(self._tmrKeepalive);
self.state = 'disconnected';
self.debug && self.debug('[connection] Closed');
self.emit('close', had_err);
});
socket.once('end', function() {
clearTimeout(self._tmrConn);
clearTimeout(self._tmrAuth);
clearTimeout(self._tmrKeepalive);
self.state = 'disconnected';
self.debug && self.debug('[connection] Ended');
self.emit('end');
});
this._parser = parser = new Parser(this._sock, this.debug);
parser.on('untagged', function(info) {
self._resUntagged(info);
});
parser.on('tagged', function(info) {
self._resTagged(info);
});
parser.on('body', function(stream, info) {
var msg = self._curReq.fetchCache[info.seqno], toget;
if (msg === undefined) {
msg = self._curReq.fetchCache[info.seqno] = {
msgEmitter: new EventEmitter(),
toget: self._curReq.fetching.slice(0),
attrs: {},
ended: false
};
self._curReq.bodyEmitter.emit('message', msg.msgEmitter, info.seqno);
}
toget = msg.toget;
// here we compare the parsed version of the expression inside BODY[]
// because 'HEADER.FIELDS (TO FROM)' really is equivalent to
// 'HEADER.FIELDS ("TO" "FROM")' and some servers will actually send the
// quoted form even if the client did not use quotes
var thisbody = parseExpr(info.which);
for (var i = 0, len = toget.length; i < len; ++i) {
if (_deepEqual(thisbody, toget[i])) {
toget.splice(i, 1);
msg.msgEmitter.emit('body', stream, info);
return;
}
}
stream.resume(); // a body we didn't ask for?
});
parser.on('continue', function(info) {
var type = self._curReq.type;
if (type === 'IDLE') {
if (self._queue.length
&& self._idle.started === 0
&& self._curReq
&& self._curReq.type === 'IDLE'
&& self._sock
&& self._sock.writable
&& !self._idle.enabled) {
self.debug && self.debug('=> DONE');
self._sock.write('DONE' + CRLF);
return;
}
// now idling
self._idle.started = Date.now();
} else if (/^AUTHENTICATE XOAUTH/.test(self._curReq.fullcmd)) {
self._curReq.oauthError = new Buffer(info.text, 'base64').toString('utf8');
self.debug && self.debug('=> ' + inspect(CRLF));
self._sock.write(CRLF);
} else if (type === 'APPEND') {
self._sockWriteAppendData(self._curReq.appendData);
} else if (self._curReq.lines && self._curReq.lines.length) {
var line = self._curReq.lines.shift() + '\r\n';
self.debug && self.debug('=> ' + inspect(line));
self._sock.write(line, 'binary');
}
});
parser.on('other', function(line) {
var m;
if (m = RE_IDLENOOPRES.exec(line)) {
// no longer idling
self._idle.enabled = false;
self._idle.started = undefined;
clearTimeout(self._tmrKeepalive);
self._curReq = undefined;
if (self._queue.length === 0
&& self._config.keepalive
&& self.state === 'authenticated'
&& !self._idle.enabled) {
self._idle.enabled = true;
if (m[1] === 'NOOP')
self._doKeepaliveTimer();
else
self._doKeepaliveTimer(true);
}
self._processQueue();
}
});
this._tmrConn = setTimeout(function() {
var err = new Error('Timed out while connecting to server');
err.source = 'timeout';
self.emit('error', err);
socket.destroy();
}, config.connTimeout);
socket.connect(config.port, config.host);
};
Connection.prototype.serverSupports = function(cap) {
return (this._caps && this._caps.indexOf(cap) > -1);
};
Connection.prototype.destroy = function() {
this._queue = [];
this._curReq = undefined;
this._sock && this._sock.destroy();
};
Connection.prototype.end = function() {
var self = this;
this._enqueue('LOGOUT', function() {
self._queue = [];
self._curReq = undefined;
self._sock.end();
});
};
Connection.prototype.append = function(data, options, cb) {
var literal = this.serverSupports('LITERAL+');
if (typeof options === 'function') {
cb = options;
options = undefined;
}
options = options || {};
if (!options.mailbox) {
if (!this._box)
throw new Error('No mailbox specified or currently selected');
else
options.mailbox = this._box.name;
}
var cmd = 'APPEND "' + escape(utf7.encode(''+options.mailbox)) + '"';
if (options.flags) {
if (!Array.isArray(options.flags))
options.flags = [options.flags];
if (options.flags.length > 0) {
for (var i = 0, len = options.flags.length; i < len; ++i) {
if (options.flags[i][0] !== '$' && options.flags[i][0] !== '\\')
options.flags[i] = '\\' + options.flags[i];
}
cmd += ' (' + options.flags.join(' ') + ')';
}
}
if (options.date) {
if (!isDate(options.date))
throw new Error('`date` is not a Date object');
cmd += ' "';
cmd += options.date.getDate();
cmd += '-';
cmd += MONTHS[options.date.getMonth()];
cmd += '-';
cmd += options.date.getFullYear();
cmd += ' ';
cmd += ('0' + options.date.getHours()).slice(-2);
cmd += ':';
cmd += ('0' + options.date.getMinutes()).slice(-2);
cmd += ':';
cmd += ('0' + options.date.getSeconds()).slice(-2);
cmd += ((options.date.getTimezoneOffset() > 0) ? ' -' : ' +' );
cmd += ('0' + (-options.date.getTimezoneOffset() / 60)).slice(-2);
cmd += ('0' + (-options.date.getTimezoneOffset() % 60)).slice(-2);
cmd += '"';
}
cmd += ' {';
cmd += (Buffer.isBuffer(data) ? data.length : Buffer.byteLength(data));
cmd += (literal ? '+' : '') + '}';
this._enqueue(cmd, cb);
if (literal)
this._queue[this._queue.length - 1].literalAppendData = data;
else
this._queue[this._queue.length - 1].appendData = data;
};
Connection.prototype.getBoxes = function(namespace, cb) {
if (typeof namespace === 'function') {
cb = namespace;
namespace = '';
}
namespace = escape(utf7.encode(''+namespace));
this._enqueue('LIST "' + namespace + '" "*"', cb);
};
Connection.prototype.id = function(identification, cb) {
if (!this.serverSupports('ID'))
throw new Error('Server does not support ID');
var cmd = 'ID';
if ((identification === null) || (Object.keys(identification).length === 0))
cmd += ' NIL';
else {
if (Object.keys(identification).length > 30)
throw new Error('Max allowed number of keys is 30');
var kv = [];
for (var k in identification) {
if (Buffer.byteLength(k) > 30)
throw new Error('Max allowed key length is 30');
if (Buffer.byteLength(identification[k]) > 1024)
throw new Error('Max allowed value length is 1024');
kv.push('"' + escape(k) + '"');
kv.push('"' + escape(identification[k]) + '"');
}
cmd += ' (' + kv.join(' ') + ')';
}
this._enqueue(cmd, cb);
};
Connection.prototype.openBox = function(name, readOnly, cb) {
if (this.state !== 'authenticated')
throw new Error('Not authenticated');
if (typeof readOnly === 'function') {
cb = readOnly;
readOnly = false;
}
name = ''+name;
var encname = escape(utf7.encode(name)),
cmd = (readOnly ? 'EXAMINE' : 'SELECT'),
self = this;
cmd += ' "' + encname + '"';
if (this.serverSupports('CONDSTORE'))
cmd += ' (CONDSTORE)';
this._enqueue(cmd, function(err) {
if (err) {
self._box = undefined;
cb(err);
} else {
self._box.name = name;
cb(err, self._box);
}
});
};
Connection.prototype.closeBox = function(shouldExpunge, cb) {
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
var self = this;
if (typeof shouldExpunge === 'function') {
cb = shouldExpunge;
shouldExpunge = true;
}
if (shouldExpunge) {
this._enqueue('CLOSE', function(err) {
if (!err)
self._box = undefined;
cb(err);
});
} else {
if (this.serverSupports('UNSELECT')) {
// use UNSELECT if available, as it claims to be "cleaner" than the
// alternative "hack"
this._enqueue('UNSELECT', function(err) {
if (!err)
self._box = undefined;
cb(err);
});
} else {
// "HACK": close the box without expunging by attempting to SELECT a
// non-existent mailbox
var badbox = 'NODEJSIMAPCLOSINGBOX' + Date.now();
this._enqueue('SELECT "' + badbox + '"', function(err) {
self._box = undefined;
cb();
});
}
}
};
Connection.prototype.addBox = function(name, cb) {
this._enqueue('CREATE "' + escape(utf7.encode(''+name)) + '"', cb);
};
Connection.prototype.delBox = function(name, cb) {
this._enqueue('DELETE "' + escape(utf7.encode(''+name)) + '"', cb);
};
Connection.prototype.renameBox = function(oldname, newname, cb) {
var encoldname = escape(utf7.encode(''+oldname)),
encnewname = escape(utf7.encode(''+newname)),
self = this;
this._enqueue('RENAME "' + encoldname + '" "' + encnewname + '"',
function(err) {
if (err)
return cb(err);
if (self._box
&& self._box.name === oldname
&& oldname.toUpperCase() !== 'INBOX') {
self._box.name = newname;
cb(err, self._box);
} else
cb();
}
);
};
Connection.prototype.subscribeBox = function(name, cb) {
this._enqueue('SUBSCRIBE "' + escape(utf7.encode(''+name)) + '"', cb);
};
Connection.prototype.unsubscribeBox = function(name, cb) {
this._enqueue('UNSUBSCRIBE "' + escape(utf7.encode(''+name)) + '"', cb);
};
Connection.prototype.getSubscribedBoxes = function(namespace, cb) {
if (typeof namespace === 'function') {
cb = namespace;
namespace = '';
}
namespace = escape(utf7.encode(''+namespace));
this._enqueue('LSUB "' + namespace + '" "*"', cb);
};
Connection.prototype.status = function(boxName, cb) {
if (this._box && this._box.name === boxName)
throw new Error('Cannot call status on currently selected mailbox');
boxName = escape(utf7.encode(''+boxName));
var info = [ 'MESSAGES', 'RECENT', 'UNSEEN', 'UIDVALIDITY', 'UIDNEXT' ];
if (this.serverSupports('CONDSTORE'))
info.push('HIGHESTMODSEQ');
info = info.join(' ');
this._enqueue('STATUS "' + boxName + '" (' + info + ')', cb);
};
Connection.prototype.expunge = function(uids, cb) {
if (typeof uids === 'function') {
cb = uids;
uids = undefined;
}
if (uids !== undefined) {
if (!Array.isArray(uids))
uids = [uids];
validateUIDList(uids);
if (uids.length === 0)
throw new Error('Empty uid list');
uids = uids.join(',');
if (!this.serverSupports('UIDPLUS'))
throw new Error('Server does not support this feature (UIDPLUS)');
this._enqueue('UID EXPUNGE ' + uids, cb);
} else
this._enqueue('EXPUNGE', cb);
};
Connection.prototype.search = function(criteria, cb) {
this._search('UID ', criteria, cb);
};
Connection.prototype._search = function(which, criteria, cb) {
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
else if (!Array.isArray(criteria))
throw new Error('Expected array for search criteria');
var cmd = which + 'SEARCH',
info = { hasUTF8: false /*output*/ },
query = buildSearchQuery(criteria, this._caps, info),
lines;
if (info.hasUTF8) {
cmd += ' CHARSET UTF-8';
lines = query.split(CRLF);
query = lines.shift();
}
cmd += query;
this._enqueue(cmd, cb);
if (info.hasUTF8) {
var req = this._queue[this._queue.length - 1];
req.lines = lines;
}
};
Connection.prototype.addFlags = function(uids, flags, cb) {
this._store('UID ', uids, { mode: '+', flags: flags }, cb);
};
Connection.prototype.delFlags = function(uids, flags, cb) {
this._store('UID ', uids, { mode: '-', flags: flags }, cb);
};
Connection.prototype.setFlags = function(uids, flags, cb) {
this._store('UID ', uids, { mode: '', flags: flags }, cb);
};
Connection.prototype.addKeywords = function(uids, keywords, cb) {
this._store('UID ', uids, { mode: '+', keywords: keywords }, cb);
};
Connection.prototype.delKeywords = function(uids, keywords, cb) {
this._store('UID ', uids, { mode: '-', keywords: keywords }, cb);
};
Connection.prototype.setKeywords = function(uids, keywords, cb) {
this._store('UID ', uids, { mode: '', keywords: keywords }, cb);
};
Connection.prototype._store = function(which, uids, cfg, cb) {
var mode = cfg.mode,
isFlags = (cfg.flags !== undefined),
items = (isFlags ? cfg.flags : cfg.keywords);
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
else if (uids === undefined)
throw new Error('No messages specified');
if (!Array.isArray(uids))
uids = [uids];
validateUIDList(uids);
if (uids.length === 0) {
throw new Error('Empty '
+ (which === '' ? 'sequence number' : 'uid')
+ 'list');
}
if ((!Array.isArray(items) && typeof items !== 'string')
|| (Array.isArray(items) && items.length === 0))
throw new Error((isFlags ? 'Flags' : 'Keywords')
+ ' argument must be a string or a non-empty Array');
if (!Array.isArray(items))
items = [items];
for (var i = 0, len = items.length; i < len; ++i) {
if (isFlags) {
if (items[i][0] !== '\\')
items[i] = '\\' + items[i];
} else {
// keyword contains any char except control characters (%x00-1F and %x7F)
// and: '(', ')', '{', ' ', '%', '*', '\', '"', ']'
if (RE_INVALID_KW_CHARS.test(items[i])) {
throw new Error('The keyword "' + items[i]
+ '" contains invalid characters');
}
}
}
items = items.join(' ');
uids = uids.join(',');
var modifiers = '';
if (cfg.modseq !== undefined && !this._box.nomodseq)
modifiers += 'UNCHANGEDSINCE ' + cfg.modseq + ' ';
this._enqueue(which + 'STORE ' + uids + ' '
+ modifiers
+ mode + 'FLAGS.SILENT (' + items + ')', cb);
};
Connection.prototype.copy = function(uids, boxTo, cb) {
this._copy('UID ', uids, boxTo, cb);
};
Connection.prototype._copy = function(which, uids, boxTo, cb) {
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
if (!Array.isArray(uids))
uids = [uids];
validateUIDList(uids);
if (uids.length === 0) {
throw new Error('Empty '
+ (which === '' ? 'sequence number' : 'uid')
+ 'list');
}
boxTo = escape(utf7.encode(''+boxTo));
this._enqueue(which + 'COPY ' + uids.join(',') + ' "' + boxTo + '"', cb);
};
Connection.prototype.move = function(uids, boxTo, cb) {
this._move('UID ', uids, boxTo, cb);
};
Connection.prototype._move = function(which, uids, boxTo, cb) {
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
if (this.serverSupports('MOVE')) {
if (!Array.isArray(uids))
uids = [uids];
validateUIDList(uids);
if (uids.length === 0) {
throw new Error('Empty '
+ (which === '' ? 'sequence number' : 'uid')
+ 'list');
}
uids = uids.join(',');
boxTo = escape(utf7.encode(''+boxTo));
this._enqueue(which + 'MOVE ' + uids + ' "' + boxTo + '"', cb);
} else if (this._box.permFlags.indexOf('\\Deleted') === -1
&& this._box.flags.indexOf('\\Deleted') === -1) {
throw new Error('Cannot move message: '
+ 'server does not allow deletion of messages');
} else {
var deletedUIDs, task = 0, self = this;
this._copy(which, uids, boxTo, function ccb(err, info) {
if (err)
return cb(err, info);
if (task === 0 && which && self.serverSupports('UIDPLUS')) {
// UIDPLUS gives us a 'UID EXPUNGE n' command to expunge a subset of
// messages with the \Deleted flag set. This allows us to skip some
// actions.
task = 2;
}
// Make sure we don't expunge any messages marked as Deleted except the
// one we are moving
if (task === 0) {
self.search(['DELETED'], function(e, result) {
++task;
deletedUIDs = result;
ccb(e, info);
});
} else if (task === 1) {
if (deletedUIDs.length) {
self.delFlags(deletedUIDs, '\\Deleted', function(e) {
++task;
ccb(e, info);
});
} else {
++task;
ccb(err, info);
}
} else if (task === 2) {
var cbMarkDel = function(e) {
++task;
ccb(e, info);
};
if (which)
self.addFlags(uids, '\\Deleted', cbMarkDel);
else
self.seq.addFlags(uids, '\\Deleted', cbMarkDel);
} else if (task === 3) {
if (which && self.serverSupports('UIDPLUS'))
self.expunge(uids, cb);
else {
self.expunge(function(e) {
++task;
ccb(e, info);
});
}
} else if (task === 4) {
if (deletedUIDs.length) {
self.addFlags(deletedUIDs, '\\Deleted', function(e) {
cb(e, info);
});
} else
cb(err, info);
}
});
}
};
Connection.prototype.fetch = function(uids, options) {
return this._fetch('UID ', uids, options);
};
Connection.prototype._fetch = function(which, uids, options) {
if (uids === undefined
|| uids === null
|| (Array.isArray(uids) && uids.length === 0))
throw new Error('Nothing to fetch');
if (!Array.isArray(uids))
uids = [uids];
validateUIDList(uids);
if (uids.length === 0) {
throw new Error('Empty '
+ (which === '' ? 'sequence number' : 'uid')
+ 'list');
}
uids = uids.join(',');
var cmd = which + 'FETCH ' + uids + ' (',
fetching = [],
i, len, key;
if (this.serverSupports('X-GM-EXT-1')) {
fetching.push('X-GM-THRID');
fetching.push('X-GM-MSGID');
fetching.push('X-GM-LABELS');
}
if (this.serverSupports('CONDSTORE') && !this._box.nomodseq)
fetching.push('MODSEQ');
fetching.push('UID');
fetching.push('FLAGS');
fetching.push('INTERNALDATE');
var modifiers;
if (options) {
modifiers = options.modifiers;
if (options.envelope)
fetching.push('ENVELOPE');
if (options.struct)
fetching.push('BODYSTRUCTURE');
if (options.size)
fetching.push('RFC822.SIZE');
cmd += fetching.join(' ');
if (options.bodies !== undefined) {
var bodies = options.bodies,
prefix = (options.markSeen ? '' : '.PEEK');
if (!Array.isArray(bodies))
bodies = [bodies];
for (i = 0, len = bodies.length; i < len; ++i) {
var suffix = '';
var parts = bodies[i].match(RE_PARTIAL_BODY);
if (parts) {
suffix = parts[2];
bodies[i] = parts[1];
}
fetching.push(parseExpr(''+bodies[i]));
cmd += ' BODY' + prefix + '[' + bodies[i] + ']' + suffix;
}
}
} else
cmd += fetching.join(' ');
cmd += ')';
var modkeys = (typeof modifiers === 'object' ? Object.keys(modifiers) : []),
modstr = ' (';
for (i = 0, len = modkeys.length, key; i < len; ++i) {
key = modkeys[i].toUpperCase();
if (key === 'CHANGEDSINCE' && this.serverSupports('CONDSTORE')
&& !this._box.nomodseq)
modstr += key + ' ' + modifiers[modkeys[i]] + ' ';
}
if (modstr.length > 2) {
cmd += modstr.substring(0, modstr.length - 1);
cmd += ')';
}
this._enqueue(cmd);
var req = this._queue[this._queue.length - 1];
req.fetchCache = {};
req.fetching = fetching;
return (req.bodyEmitter = new EventEmitter());
};
// Extension methods ===========================================================
Connection.prototype.setLabels = function(uids, labels, cb) {
this._storeLabels('UID ', uids, labels, '', cb);
};
Connection.prototype.addLabels = function(uids, labels, cb) {
this._storeLabels('UID ', uids, labels, '+', cb);
};
Connection.prototype.delLabels = function(uids, labels, cb) {
this._storeLabels('UID ', uids, labels, '-', cb);
};
Connection.prototype._storeLabels = function(which, uids, labels, mode, cb) {
if (!this.serverSupports('X-GM-EXT-1'))
throw new Error('Server must support X-GM-EXT-1 capability');
else if (this._box === undefined)
throw new Error('No mailbox is currently selected');
else if (uids === undefined)
throw new Error('No messages specified');
if (!Array.isArray(uids))
uids = [uids];
validateUIDList(uids);
if (uids.length === 0) {
throw new Error('Empty '
+ (which === '' ? 'sequence number' : 'uid')
+ 'list');
}
if ((!Array.isArray(labels) && typeof labels !== 'string')
|| (Array.isArray(labels) && labels.length === 0))
throw new Error('labels argument must be a string or a non-empty Array');
if (!Array.isArray(labels))
labels = [labels];
labels = labels.map(function(v) {
return '"' + escape(utf7.encode(''+v)) + '"';
}).join(' ');
uids = uids.join(',');
this._enqueue(which + 'STORE ' + uids + ' ' + mode
+ 'X-GM-LABELS.SILENT (' + labels + ')', cb);
};
Connection.prototype.sort = function(sorts, criteria, cb) {
this._sort('UID ', sorts, criteria, cb);
};
Connection.prototype._sort = function(which, sorts, criteria, cb) {
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
else if (!Array.isArray(sorts) || !sorts.length)
throw new Error('Expected array with at least one sort criteria');
else if (!Array.isArray(criteria))
throw new Error('Expected array for search criteria');
else if (!this.serverSupports('SORT'))
throw new Error('Sort is not supported on the server');
sorts = sorts.map(function(c) {
if (typeof c !== 'string')
throw new Error('Unexpected sort criteria data type. '
+ 'Expected string. Got: ' + typeof criteria);
var modifier = '';
if (c[0] === '-') {
modifier = 'REVERSE ';
c = c.substring(1);
}
switch (c.toUpperCase()) {
case 'ARRIVAL':
case 'CC':
case 'DATE':
case 'FROM':
case 'SIZE':
case 'SUBJECT':
case 'TO':
break;
default:
throw new Error('Unexpected sort criteria: ' + c);
}
return modifier + c;
});
sorts = sorts.join(' ');
var info = { hasUTF8: false /*output*/ },
query = buildSearchQuery(criteria, this._caps, info),
charset = 'US-ASCII',
lines;
if (info.hasUTF8) {
charset = 'UTF-8';
lines = query.split(CRLF);
query = lines.shift();
}
this._enqueue(which + 'SORT (' + sorts + ') ' + charset + query, cb);
if (info.hasUTF8) {
var req = this._queue[this._queue.length - 1];
req.lines = lines;
}
};
Connection.prototype.esearch = function(criteria, options, cb) {
this._esearch('UID ', criteria, options, cb);
};
Connection.prototype._esearch = function(which, criteria, options, cb) {
if (this._box === undefined)
throw new Error('No mailbox is currently selected');
else if (!Array.isArray(criteria))
throw new Error('Expected array for search options');
var info = { hasUTF8: false /*output*/ },
query = buildSearchQuery(criteria, this._caps, info),
charset = '',
lines;
if (info.hasUTF8) {
charset = ' CHARSET UTF-8';
lines = query.split(CRLF);
query = lines.shift();
}
if (typeof options === 'function') {
cb = options;
options = '';
} else if (!options)
options = '';
if (Array.isArray(options))
options = options.join(' ');
this._enqueue(which + 'SEARCH RETURN (' + options + ')' + charset + query, cb);
if (info.hasUTF8) {
var req = this._queue[this._queue.length - 1];
req.lines = lines;
}
};