408 lines
14 KiB
JavaScript
408 lines
14 KiB
JavaScript
// TODO: Висеть в виде демона и сразу получать новые письма (IDLE)
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// TODO: Сделать веб-сервер для обновления view
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// TODO: Сделать подписки на новые сообщения по вебсокетам
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process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
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var cfg = require('./cfg.json');
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require('heapdump');
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var gen = require('gen-thread');
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var Imap = require('imap');
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var inspect = require('util').inspect;
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var iconv = require('iconv-lite');
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var bricks = require('pg-bricks');
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var pg = bricks.configure('postgresql://'+cfg.pg.user+':'+cfg.pg.password+'@'+(cfg.pg.host||'')+':'+cfg.pg.port+'/'+cfg.pg.database);
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function splitEmails(s)
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{
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var re = /^[\s,]*(?:(?:["'](.*?)["']|([^<]+))\s*<([^>]+)>|<?([^<>]+)>?)/; // '
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var m, r = [];
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while (m = re.exec(s))
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{
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s = s.substr(m[0].length);
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r.push({ name: (m[1]||m[2]||'').trim(), email: (m[3]||m[4]||'').trim() });
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}
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return r;
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}
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function toPgArray(a)
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{
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a = JSON.stringify(a);
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return '{'+a.substring(1, a.length-1)+'}';
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}
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var Syncer = {
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};
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Syncer.sync = function*(account)
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{
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var self = this;
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var accountId;
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var [ rows ] = yield pg.select('id').from('accounts').where({ email: account.email }).rows(gen.ef());
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if (rows[0] && rows[0].id)
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accountId = rows[0].id;
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else
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{
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var [ row ] = yield pg.insert('accounts', {
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name: account.name,
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email: account.email,
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settings: {
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imap: account.imap
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}
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}).returning('id').row(gen.ef());
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accountId = row.id;
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}
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var srv = new Imap(account.imap);
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self.srv = srv;
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srv.once('ready', gen.cb());
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yield srv.connect();
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var [ boxes ] = yield srv.getBoxes(gen.ef());
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for (var k in boxes)
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{
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var [ box ] = yield srv.openBox(k, true, gen.ef());
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var boxId;
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// IMAP sync: http://tools.ietf.org/html/rfc4549
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var [ row ] = yield pg.select('*').from('folders')
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.where({ account_id: accountId, name: box.name }).rows(gen.ef());
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self.versionTag = 0;
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if (row.length)
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{
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row = row[0];
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boxId = row.id;
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if (row.uidvalidity != box.uidvalidity)
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{
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yield pg.delete('messages').where({ folder_id: row.id })
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.where(pg.sql('uid is not null')).run(gen.ef());
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}
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else
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{
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[ self.versionTag ] = yield pg.select('MAX(vertag)').from('messages')
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.where({ folder_id: row.id }).val(gen.ef());
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self.versionTag = self.versionTag || 0;
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}
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yield pg.update('folders', { uidvalidity: box.uidvalidity, unread_count: box.messages.new })
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.where({ id: row.id }).run(gen.ef());
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}
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else
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{
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[ row ] = yield pg.insert('folders', {
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name: box.name,
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uidvalidity: box.uidvalidity,
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account_id: accountId,
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unread_count: box.messages.new,
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// total_count: box.messages.count
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}).returning('id').row(gen.ef());
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boxId = row.id;
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}
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self.missing = [];
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var [ maxUid ] = yield pg.select('MAX(uid)').from('messages').where({ folder_id: boxId }).val(gen.ef());
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if (maxUid)
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{
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// list messages, update flags and version tag
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self.versionTag++;
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if (self.versionTag >= 0x7fffffff)
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{
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yield pg.update('messages', { vertag: 0 }).where({ folder_id: boxId }).run(gen.ef());
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self.versionTag = 1;
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}
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process.stderr.write('\rsynchronizing 0');
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yield* self.runFetch('1:'+maxUid, {}, boxId, 'updateFlags');
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process.stderr.write('\n');
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// delete messages removed from IMAP server
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yield pg.update('threads', { first_msg: null })
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.where(pg.sql('first_msg IN ('+
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pg.select('id').from('messages')
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.where({ folder_id: boxId })
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.where(pg.sql('uid is not null'))
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.where(pg.sql.lt('vertag', self.versionTag))
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+')')).run(gen.ef());
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yield pg.delete('messages')
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.where({ folder_id: boxId })
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.where(pg.sql('uid is not null'))
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.where(pg.sql.lt('vertag', self.versionTag)).run(gen.ef());
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yield pg.update('threads',
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{ first_msg: pg.sql('('+
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pg.select('MIN(id)').from('messages').where({ thread_id: pg.sql('threads.id') })+')'
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) }).where(pg.sql('first_msg IS NULL')).run(gen.ef());
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yield pg.delete('threads').where(pg.sql('first_msg IS NULL')).run(gen.ef());
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}
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// fetch new messages
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self.missing.push((maxUid ? maxUid+1 : 1)+':*');
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yield* self.runFetch(self.missing, {
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size: true,
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bodies: 'HEADER'
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}, boxId, 'saveMessages');
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yield srv.closeBox(gen.cb());
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}
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srv.end();
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self.srv = null;
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}
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Syncer.runFetch = function*(what, params, boxId, processor)
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{
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var self = this;
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var f = self.srv.fetch(what, params);
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self.parsed = 0;
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self.paused = false;
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self.synced = 0;
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self.pending = [];
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var cb, wait;
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f.on('message', function(msg, seqnum)
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{
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gen.run(self.onMessage(msg, seqnum, boxId, processor), checkFinish, function(e) { checkFinish(); throw e; });
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});
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cb = gen.cb();
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yield f.once('end', function()
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{
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wait = true;
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if (self.parsed <= 0)
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cb();
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else if (self.pending.length > 0)
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gen.run(self[processor](self.pending, boxId), saveLast, function(e) { saveLast(); throw e; });
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});
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function saveLast()
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{
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self.parsed -= self.pending.length;
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self.pending = [];
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checkFinish();
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}
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function checkFinish()
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{
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if (self.parsed <= 0 && wait)
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cb();
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}
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};
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Syncer.onMessage = function*(msg, seqnum, boxId, processor)
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{
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var self = this;
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var [ msgrow, attrs ] = yield* self.parseMessage(msg, seqnum, boxId);
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self.pending.push([ msgrow, attrs ]);
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self.parsed++;
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if (!self.paused && self.parsed >= 20)
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{
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// ГОРШОЧЕК, НЕ ВАРИ!!! И так уже кучу сообщений прочитал из сокета, хорош!
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self.srv._parser._ignoreReadable = true;
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self.paused = true;
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}
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if (self.pending.length >= 20)
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{
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var m = self.pending;
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self.pending = [];
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var err;
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try
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{
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yield gen.run(self[processor](m, boxId), gen.cb());
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}
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catch (e)
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{
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err = e;
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}
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self.parsed -= m.length;
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if (self.paused && self.parsed < 20)
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{
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self.paused = false;
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self.srv._parser._ignoreReadable = false;
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process.nextTick(self.srv._parser._cbReadable);
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}
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if (err)
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throw err;
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}
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}
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Syncer.parseMessage = function*(msg, seqnum, boxId)
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{
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var msgrow = {};
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var attrs;
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msg.on('body', function(stream, info)
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{
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var buffer;
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stream.on('data', function(chunk)
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{
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if (!buffer)
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buffer = chunk;
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else
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buffer = Buffer.concat([ buffer, chunk ]);
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});
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stream.once('end', function()
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{
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msgrow.body = '';
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var b = buffer.toString('utf8');
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if (b.indexOf('<27>') >= 0)
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{
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let enc = /Content-type:\s*[^;\n]*;\s*charset=(\S+)/i.exec(b);
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enc = enc ? enc[1] : 'windows-1251';
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try { b = iconv.decode(buffer, enc); }
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catch (e) {}
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}
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if (b.indexOf('\0') >= 0)
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b = b.substr(0, b.indexOf('\0'));
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msgrow.headers = b;
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});
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});
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msg.once('attributes', function(a) {
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attrs = a;
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});
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yield msg.once('end', gen.cb());
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msgrow.uid = attrs.uid;
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msgrow.folder_id = boxId;
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msgrow.flags = attrs.flags.map(f => f[0] == '\\' ? f.toLowerCase().replace(/^\\/, '') : f.replace(/^\$*/, '$'));
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var nf = msgrow.flags.filter(f => f != 'seen');
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msgrow.flags = nf.length == msgrow.flags.length ? nf.concat(['unread']) : nf;
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// Workaround memory leak in node-imap
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// TODO: send pull request
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if (this.srv._curReq && this.srv._curReq.fetchCache)
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delete this.srv._curReq.fetchCache[seqnum];
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return [ msgrow, attrs ];
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}
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Syncer.updateFlags = function*(messages, boxId)
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{
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yield gen.throttle(3);
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var self = this;
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var rows = messages.map(m => ({
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uid: m[0].uid,
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flags: toPgArray(m[0].flags)
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}));
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var [ updated ] = yield pg.update('messages m', { flags: pg.sql('t.flags::varchar(255)[]'), vertag: self.versionTag })
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.from('('+pg.sql.values(rows)+') AS t (uid, flags)')
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.where({ 'm.folder_id': boxId }).where(pg.sql('m.uid=t.uid')).returning('m.uid').rows(gen.ef());
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var uh = {}, i;
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for (i = 0; i < updated.length; i++)
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uh[updated[i].uid] = true;
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for (i = 0; i < messages.length; i++)
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if (!uh[messages[i][0].uid])
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self.missing.push(messages[i][0].uid);
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self.synced += messages.length;
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process.stderr.write('\rsynchronizing '+self.synced);
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}
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Syncer.saveMessages = function*(messages, boxId)
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{
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var self = this;
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yield gen.throttle(2);
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var uids = messages.map(m => m[1].uid);
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var [ exist ] = yield pg.select('uid, flags').from('messages')
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.where({ folder_id: boxId }).where(pg.sql.in('uid', uids)).rows(gen.ef());
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uids = {};
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for (var i = 0; i < exist.length; i++)
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uids[exist[i].uid] = true;
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for (var i = 0; i < messages.length; i++)
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if (!uids[messages[i][1].uid])
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yield* this.addMessage(messages[i][0], messages[i][1]);
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}
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Syncer.addMessage = function*(msgrow, attrs)
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{
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var self = this;
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var pgtx, end_transaction;
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try
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{
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[ pgtx, end_transaction ] = yield pg.transaction(gen.cb(), function(e) { if (e) throw e; });
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var header = Imap.parseHeader(msgrow.headers);
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for (var i in header)
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for (var k = 0; k < header[i].length; k++)
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header[i][k] = header[i][k].replace(/\x00/g, '');
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header.from = header.from && splitEmails(header.from[0])[0];
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header.replyto = header['reply-to'] && splitEmails(header['reply-to'][0])[0];
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var re = /(<[^>]*>)/;
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header.references = (header.references && header.references[0] || '').split(re).filter(a => a.match(re));
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if (header.references.length)
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{
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if (header.references.length > 10)
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header.references = [ header.references[0] ].concat(header.references.slice(header.references.length-9));
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if (!header['in-reply-to'] || !header['in-reply-to'][0])
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header['in-reply-to'] = [ header.references[header.references.length-1] ];
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else if (header.references[header.references.length-1] != header['in-reply-to'][0])
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header.references.push(header['in-reply-to'][0]);
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}
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if (header.date)
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{
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var t = Date.parse(header.date[0]);
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if (!isNaN(t))
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header.date = new Date(t);
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else
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header.date = null;
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}
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if (!header.date)
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header.date = new Date(attrs.date);
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msgrow.from_email = header.from && header.from.email || '';
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msgrow.from_name = header.from && header.from.name || '';
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msgrow.replyto_email = header.replyto && header.replyto.email || '';
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msgrow.replyto_name = header.replyto && header.replyto.name || '';
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msgrow.to_list = header.to && header.to[0] || '';
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msgrow.cc_list = header.cc && header.cc[0] || '';
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msgrow.bcc_list = header.bcc && header.bcc[0] || '';
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msgrow.subject = header.subject && header.subject[0] || '';
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msgrow.messageid = header['message-id'] && header['message-id'][0] || '';
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msgrow.inreplyto = header['in-reply-to'] && header['in-reply-to'][0] || '';
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msgrow.inreplyto = msgrow.inreplyto.replace(/^[\s\S]*(<[^>]*>)[\s\S]*$/, '$1');
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msgrow.time = header.date;
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msgrow.flags = toPgArray(msgrow.flags);
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msgrow.refs = toPgArray(header.references);
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msgrow.vertag = self.versionTag;
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var thisIsFirst = false;
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if (header.references.length)
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{
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let [ threadId ] = yield pgtx.select('MAX(thread_id)').from('messages')
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.where(pg.sql.in('messageid', header.references)).val(gen.ef());
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if (!threadId)
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{
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[ threadId ] = yield pgtx.select('MAX(thread_id)').from('messages')
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.where(new pg.sql.Binary('@>', 'refs', toPgArray([msgrow.messageid]))).val(gen.ef());
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if (threadId)
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thisIsFirst = true;
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}
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msgrow.thread_id = threadId;
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}
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console.log(msgrow.time+' '+msgrow.from_email+' '+msgrow.subject);
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[ msgrow.id ] = yield pgtx.insert('messages', msgrow).returning('id').val(gen.ef());
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if (!msgrow.thread_id)
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{
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[ msgrow.thread_id ] = yield pgtx.insert('threads', {
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first_msg: msgrow.id,
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msg_count: 1
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}).returning('id').val(gen.ef());
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yield pgtx.update('messages', { thread_id: msgrow.thread_id }).where({ id: msgrow.id }).run(gen.ef());
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}
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else
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{
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let upd = pgtx.update('threads', { msg_count: pg.sql('msg_count+1') });
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if (thisIsFirst)
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upd.first_msg = msgrow.id;
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yield upd.where({ id: msgrow.threadId }).run(gen.ef());
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}
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end_transaction();
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}
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catch (e0)
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{
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if (end_transaction)
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end_transaction();
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throw e0;
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}
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}
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gen.run(function*()
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{
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for (var i = 0; i < cfg.accounts.length; i++)
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yield* Syncer.sync(cfg.accounts[i]);
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process.exit();
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});
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