428 lines
15 KiB
JavaScript
428 lines
15 KiB
JavaScript
const gen = require('gen-thread');
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const Imap = require('imap');
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const ImapManager = require('./ImapManager.js');
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module.exports = Syncer;
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function Syncer(pg)
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{
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this.syncInProgress = false;
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this.pg = pg;
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this.imap = new ImapManager();
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}
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Syncer.prototype.init = function*(cfg)
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{
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for (var i = 0; i < cfg.accounts.length; i++)
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yield* this.addAccount(cfg.accounts[i]);
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yield* this.loadAccounts();
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}
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Syncer.prototype.syncAll = function*()
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{
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this.syncInProgress = true;
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for (var id in this.accounts)
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yield* this.syncAccount(this.accounts[id]);
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this.syncInProgress = false;
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}
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Syncer.prototype.addAccount = function*(account)
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{
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var self = this;
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var [ row ] = yield this.pg.select('id').from('accounts').where({ email: account.email }).rows(gen.ef());
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if (row.length)
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{
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row = row[0];
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}
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else
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{
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[ row ] = yield this.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('*').row(gen.ef());
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}
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return row.id;
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}
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Syncer.prototype.loadAccounts = function*()
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{
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let [ rows ] = yield this.pg.select('*').from('accounts').rows(gen.ef());
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this.accounts = {};
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for (var i = 0; i < rows.length; i++)
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{
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this.accounts[rows[i].id] = rows[i];
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this.imap.setServer(rows[i].id, rows[i].settings.imap);
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}
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}
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Syncer.prototype.syncAccount = 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 this.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 this.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 = yield* self.imap.getConnection(accountId, null, 'S');
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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 boxKind = (boxes[k].special_use_attrib || '').replace('\\', '').toLowerCase();
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yield* self.syncBox(srv, accountId, k, boxKind, true);
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}
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yield* self.runIdle(accountId, srv);
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self.imap.releaseConnection(accountId, 'S');
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}
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Syncer.prototype.syncBox = function*(srv, accountId, boxName, boxKind, doFull)
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{
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var [ boxStatus ] = yield srv.openBox(boxName, true, gen.ef());
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// IMAP sync: http://tools.ietf.org/html/rfc4549
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var [ boxRow ] = yield this.pg.select('*').from('folders')
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.where({ account_id: accountId, name: boxStatus.name }).rows(gen.ef());
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if (boxRow.length)
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{
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boxRow = boxRow[0];
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if (boxRow.uidvalidity != boxStatus.uidvalidity)
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{
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yield* this.deleteMessages(this.pg.sql.and({ folder_id: boxRow.id }, this.pg.sql('uid is not null')));
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boxRow.uidvalidity = boxStatus.uidvalidity;
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}
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}
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else
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{
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[ boxRow ] = yield this.pg.insert('folders', {
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name: boxStatus.name,
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uidvalidity: boxStatus.uidvalidity,
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account_id: accountId,
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highestmodseq: 0,
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kind: boxKind||''
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//unread_count: boxStatus.messages.new,
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//total_count: boxStatus.messages.total,
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}).returning('id').row(gen.ef());
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}
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// fetch new messages
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var missing = [];
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var [ maxUid ] = yield this.pg.select('MAX(uid)').from('messages')
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.where({ folder_id: boxRow.id }).val(gen.ef());
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if (boxStatus.highestmodseq)
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{
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process.stderr.write(this.accounts[accountId].email+'/'+boxRow.name+': quick resync\n');
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yield* this.quickResync(srv, boxRow.id, maxUid, boxRow.highestmodseq, missing);
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boxRow.highestmodseq = boxStatus.highestmodseq;
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}
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else if (doFull && maxUid)
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{
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// list messages, update flags and version tag
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process.stderr.write(this.accounts[accountId].email+'/'+boxRow.name+': full resync\n');
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yield* this.fullResync(srv, boxRow.id, maxUid, missing);
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}
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missing.push((maxUid ? maxUid+1 : 1)+':*');
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yield* this.imap.runFetch(srv, missing, {
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size: true,
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bodies: 'HEADER'
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}, (messages, state) => this.saveMessages(messages, boxRow.id, state));
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yield this.pg.update('folders', {
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uidvalidity: boxRow.uidvalidity,
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highestmodseq: boxRow.highestmodseq||0
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}).where({ id: boxRow.id }).run(gen.ef());
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}
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Syncer.prototype.runIdle = function*(accountId, srv)
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{
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var self = this;
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yield srv.openBox('INBOX', true, gen.ef());
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srv.on('uidvalidity', function(uidvalidity)
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{
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// uidvalidity changes (FUUUU) remove everything
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});
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srv.on('mail', function(count)
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{
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// <count> new messages arrived while idling, fetch them
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gen.run(function*()
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{
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var srv = yield* self.imap.getConnection(accountId, null, 'S');
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yield* self.syncBox(srv, accountId, 'INBOX');
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self.imap.releaseConnection(accountId, 'S');
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});
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});
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srv.on('vanish', function(uids)
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{
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// messages expunged by uids
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console.log([ 'VANISH', uids ]);
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});
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srv.on('expunge', function(seqno)
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{
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// message expunged by (FUUUU) sequence number
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console.log(arguments);
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});
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}
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Syncer.prototype.fullResync = function*(srv, boxId, maxUid, missing)
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{
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var [ flags ] = yield this.pg.select('uid, flags').from('messages').where({ folder_id: boxId }).rows(gen.ef());
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flags = flags.reduce((o, row) => { o[row.uid] = row.flags; return o; }, {});
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var updateFlags = [];
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process.stderr.write('\rsynchronizing 0');
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yield* this.imap.runFetch(
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srv, '1:'+maxUid, {},
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(messages, state) => this.queueFlags(messages, boxId, state),
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{ flags: flags, updateFlags: updateFlags, missing: missing||[] }
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);
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process.stderr.write('\n');
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yield* this.updateFlags(boxId, updateFlags);
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// delete messages removed from IMAP server
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flags = Object.keys(flags);
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if (flags.length)
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yield* this.deleteMessages(this.pg.sql.and({ folder_id: boxId }, this.pg.sql.in('uid', flags)));
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}
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Syncer.prototype.queueFlags = function*(messages, boxId, fetchState)
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{
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for (var i = 0; i < messages.length; i++)
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{
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var m = messages[i][0];
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if (!fetchState.flags[m.uid])
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fetchState.missing.push(m.uid);
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else
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{
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if (fetchState.flags[m.uid].join(',') != m.flags.join(','))
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fetchState.updateFlags.push({ uid: m.uid, flags: toPgArray(m.flags) });
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delete fetchState.flags[m.uid];
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}
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}
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fetchState.synced += messages.length;
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process.stderr.write('\rsynchronizing '+fetchState.synced);
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}
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Syncer.prototype.updateFlags = function*(boxId, updateFlags, checkMissing)
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{
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if (updateFlags.length)
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{
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var sql = this.pg.update('messages m', { flags: this.pg.sql('t.flags::varchar(255)[]') })
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.from('('+this.pg.sql.values(updateFlags)+') AS t (uid, flags)')
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.where({ 'm.folder_id': boxId }).where(this.pg.sql('m.uid=t.uid'));
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if (checkMissing)
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{
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var [ updated ] = yield sql.returning('m.uid').rows(gen.ef());
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var missing = {};
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for (var i = 0; i < updateFlags.length; i++)
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missing[updateFlags[i].uid] = true;
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for (var i = 0; i < updated.length; i++)
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delete missing[updated[i].uid];
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return Object.keys(missing);
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}
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else
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yield sql.run(gen.ef());
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}
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return [];
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}
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Syncer.prototype.quickResync = function*(srv, boxId, maxUid, changedSince, missing)
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{
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var updateFlags = [];
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var vanished = [];
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var onVanish = function(dias)
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{
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vanished = vanished.concat(vanished, dias);
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};
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srv.on('vanish', onVanish);
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yield* this.imap.runFetch(
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srv, '1:'+maxUid, { modifiers: { changedsince: changedSince+' VANISHED' } },
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(messages, state) => queueQuickFlags(messages, boxId, state), { updateFlags: updateFlags }
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);
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srv.removeListener('vanish', onVanish);
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var checkedMissing = yield* this.updateFlags(boxId, updateFlags, missing && true);
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if (missing)
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missing.push.apply(missing, checkedMissing);
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if (vanished.length)
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{
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let lst = [], dia = [];
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for (let i = 0; i < vanished.length; i++)
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{
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if (vanished[i][1])
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dia.push('uid >= '+vanished[i][0]+' AND uid <= '+vanished[i][1]);
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else
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lst.push(vanished[i][0]);
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}
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if (lst.length)
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dia.push('uid IN ('+lst.join(',')+')');
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yield* this.deleteMessages(this.pg.sql.and({ folder_id: boxId }, this.pg.sql('('+dia.join(' OR ')+')')));
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}
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}
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Syncer.prototype.queueQuickFlags = function*(messages, boxId, fetchState)
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{
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for (var i = 0; i < messages.length; i++)
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{
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var m = messages[i][0];
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fetchState.updateFlags.push({ uid: m.uid, flags: toPgArray(m.flags) });
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}
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}
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Syncer.prototype.deleteMessages = function*(where)
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{
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yield this.pg.update('threads', { first_msg: null })
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.where(this.pg.sql('first_msg IN ('+this.pg.select('id').from('messages').where(where)+')'))
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.run(gen.ef());
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yield this.pg.delete('messages').where(where).run(gen.ef());
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yield this.pg.update('threads',
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{ first_msg: this.pg.sql('('+
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this.pg.select('id').from('messages').where({ thread_id: this.pg.sql('threads.id') }).orderBy('time').limit(1)
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+')') }).where(this.pg.sql('first_msg IS NULL')).run(gen.ef());
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yield this.pg.delete('threads').where(this.pg.sql('first_msg IS NULL')).run(gen.ef());
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}
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Syncer.prototype.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 this.pg.select('uid, flags').from('messages')
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.where({ folder_id: boxId }).where(this.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(boxId, messages[i][0], messages[i][1]);
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}
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Syncer.prototype.addMessage = function*(boxId, 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 this.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.folder_id = boxId;
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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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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(this.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 this.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: this.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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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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