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https://github.com/moparisthebest/mail
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unified variable naming in delta sync algorithm
This commit is contained in:
Felix Hammerl
parent
7353fcb0bf
commit
a455e22ae3
@ -149,20 +149,20 @@ define(function(require) {
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* delta2: memory > storage => we added messages, push to remote <<< not supported yet
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*
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* Second, we check the delta for the flags
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* deltaF1: memory > storage => we changed flags, sync them to the remote and memory
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* deltaF2: memory > storage => we changed flags, sync them to the remote and memory
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*
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* Third, we go on to sync between imap and memory, again based on uid
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* delta3: memory > imap => we deleted messages directly from the remote, remove from memory and storage
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* delta4: imap > memory => we have new messages available, fetch to memory and storage
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*
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* Fourth, we pull changes in the flags downstream
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* deltaF2: imap > memory => we changed flags directly on the remote, sync them to the storage and memory
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* deltaF4: imap > memory => we changed flags directly on the remote, sync them to the storage and memory
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*/
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var self = this,
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folder,
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delta1 /*, delta2 */ , delta3, delta4, //message
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deltaF1, deltaF2,
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deltaF2, deltaF4,
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isFolderInitialized;
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@ -202,27 +202,27 @@ define(function(require) {
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folder.messages = [];
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self._localListMessages({
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folder: folder.path
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}, function(err, messages) {
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}, function(err, storedMessages) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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if (_.isEmpty(messages)) {
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if (_.isEmpty(storedMessages)) {
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// if there's nothing here, we're good
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callback();
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doImapDelta();
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return;
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}
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var after = _.after(messages.length, function() {
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var after = _.after(storedMessages.length, function() {
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callback();
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doImapDelta();
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});
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messages.forEach(function(message) {
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handleMessage(message, function(err, cleartextMessage) {
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storedMessages.forEach(function(storedMessage) {
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handleMessage(storedMessage, function(err, cleartextMessage) {
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if (err) {
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self._account.busy = false;
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callback(err);
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@ -239,7 +239,7 @@ define(function(require) {
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function doLocalDelta() {
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self._localListMessages({
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folder: folder.path
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}, function(err, messages) {
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}, function(err, storedMessages) {
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if (err) {
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self._account.busy = false;
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callback(err);
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@ -249,28 +249,29 @@ define(function(require) {
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/*
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* delta1: storage > memory => we deleted messages, remove from remote
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* delta2: memory > storage => we added messages, push to remote
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* deltaF1: memory > storage => we changed flags, sync them to the remote and memory
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* deltaF2: memory > storage => we changed flags, sync them to the remote and memory
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*/
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delta1 = checkDelta(messages, folder.messages);
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// delta2 = checkDelta(folder.messages, messages); // not supported yet
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deltaF1 = checkFlags(folder.messages, messages);
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delta1 = checkDelta(storedMessages, folder.messages);
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// delta2 = checkDelta(folder.messages, storedMessages); // not supported yet
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deltaF2 = checkFlags(folder.messages, storedMessages);
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doDelta1();
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function doDelta1() {
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if (_.isEmpty(delta1)) {
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doDeltaF1();
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doDeltaF2();
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return;
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}
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var after = _.after(delta1.length, function() {
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doDeltaF1();
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doDeltaF2();
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});
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delta1.forEach(function(message) {
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// deltaF2 contains references to the in-memory messages
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delta1.forEach(function(inMemoryMessage) {
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var deleteMe = {
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folder: folder.path,
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uid: message.uid
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uid: inMemoryMessage.uid
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};
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self._imapDeleteMessage(deleteMe, function(err) {
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@ -293,24 +294,25 @@ define(function(require) {
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});
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}
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function doDeltaF1() {
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if (_.isEmpty(deltaF1)) {
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function doDeltaF2() {
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if (_.isEmpty(deltaF2)) {
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callback();
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doImapDelta();
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return;
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}
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var after = _.after(deltaF1.length, function() {
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var after = _.after(deltaF2.length, function() {
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callback();
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doImapDelta();
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});
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deltaF1.forEach(function(message) {
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// deltaF2 contains references to the in-memory messages
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deltaF2.forEach(function(inMemoryMessage) {
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self._imapMark({
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folder: folder.path,
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uid: message.uid,
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unread: message.unread,
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answered: message.answered
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uid: inMemoryMessage.uid,
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unread: inMemoryMessage.unread,
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answered: inMemoryMessage.answered
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}, function(err) {
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if (err) {
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self._account.busy = false;
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@ -318,16 +320,16 @@ define(function(require) {
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return;
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}
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var encryptedMsg = _.findWhere(messages, {
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uid: message.uid
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var storedMessage = _.findWhere(storedMessages, {
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uid: inMemoryMessage.uid
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});
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encryptedMsg.unread = message.unread;
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encryptedMsg.answered = message.answered;
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storedMessage.unread = inMemoryMessage.unread;
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storedMessage.answered = inMemoryMessage.answered;
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self._localStoreMessages({
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folder: folder.path,
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emails: [encryptedMsg]
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emails: [storedMessage]
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}, function(err) {
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if (err) {
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self._account.busy = false;
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@ -364,11 +366,11 @@ define(function(require) {
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/*
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* delta3: memory > imap => we deleted messages directly from the remote, remove from memory and storage
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* delta4: imap > memory => we have new messages available, fetch to memory and storage
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* deltaF2: imap > memory => we changed flags directly on the remote, sync them to the storage and memory
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* deltaF4: imap > memory => we changed flags directly on the remote, sync them to the storage and memory
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*/
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delta3 = checkDelta(folder.messages, headers);
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delta4 = checkDelta(headers, folder.messages);
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deltaF2 = checkFlags(headers, folder.messages);
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deltaF4 = checkFlags(headers, folder.messages);
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doDelta3();
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@ -384,15 +386,12 @@ define(function(require) {
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doDelta4();
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});
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delta3.forEach(function(header) {
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// remove delta3 from memory
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var idx = folder.messages.indexOf(header);
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folder.messages.splice(idx, 1);
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// delta3 contains references to the in-memory messages that have been deleted from the remote
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delta3.forEach(function(inMemoryMessage) {
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// remove delta3 from local storage
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self._localDeleteMessage({
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folder: folder.path,
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uid: header.uid
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uid: inMemoryMessage.uid
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}, function(err) {
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if (err) {
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self._account.busy = false;
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@ -400,6 +399,10 @@ define(function(require) {
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return;
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}
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// remove delta3 from memory
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var idx = folder.messages.indexOf(inMemoryMessage);
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folder.messages.splice(idx, 1);
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after();
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});
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});
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@ -410,19 +413,20 @@ define(function(require) {
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function doDelta4() {
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// no delta, we're done here
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if (_.isEmpty(delta4)) {
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doDeltaF2();
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doDeltaF4();
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return;
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}
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var after = _.after(delta4.length, function() {
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doDeltaF2();
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doDeltaF4();
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});
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delta4.forEach(function(header) {
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// delta4 contains the headers that are newly available on the remote
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delta4.forEach(function(imapHeader) {
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// get the whole message
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self._imapGetMessage({
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folder: folder.path,
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uid: header.uid
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uid: imapHeader.uid
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}, function(err, message) {
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if (err) {
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self._account.busy = false;
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@ -445,15 +449,15 @@ define(function(require) {
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// create a bastard child of smtp and imap.
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// before thinking this is stupid, talk to the guys who wrote this.
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header.id = message.id;
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header.body = message.body;
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header.html = message.html;
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header.attachments = message.attachments;
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imapHeader.id = message.id;
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imapHeader.body = message.body;
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imapHeader.html = message.html;
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imapHeader.attachments = message.attachments;
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// add the encrypted message to the local storage
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self._localStoreMessages({
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folder: folder.path,
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emails: [header]
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emails: [imapHeader]
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}, function(err) {
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if (err) {
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self._account.busy = false;
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@ -462,7 +466,7 @@ define(function(require) {
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}
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// decrypt and add to folder in memory
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handleMessage(header, function(err, cleartextMessage) {
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handleMessage(imapHeader, function(err, cleartextMessage) {
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if (err) {
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self._account.busy = false;
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callback(err);
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@ -479,38 +483,39 @@ define(function(require) {
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// we have a mismatch concerning flags between imap and memory.
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// pull changes from imap.
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function doDeltaF2() {
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if (_.isEmpty(deltaF2)) {
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function doDeltaF4() {
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if (_.isEmpty(deltaF4)) {
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self._account.busy = false;
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callback();
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return;
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}
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var after = _.after(deltaF2.length, function() {
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var after = _.after(deltaF4.length, function() {
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self._account.busy = false;
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callback();
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});
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deltaF2.forEach(function(header) {
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// deltaF4 contains the imap headers that have changed flags
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deltaF4.forEach(function(imapHeader) {
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// do a short round trip to the database to avoid re-encrypting,
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// instead use the encrypted object in the storage
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self._localListMessages({
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folder: folder.path,
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uid: header.uid
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}, function(err, storedMsgs) {
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uid: imapHeader.uid
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}, function(err, storedMessages) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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var storedMsg = storedMsgs[0];
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storedMsg.unread = header.unread;
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storedMsg.answered = header.answered;
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var storedMessage = storedMessages[0];
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storedMessage.unread = imapHeader.unread;
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storedMessage.answered = imapHeader.answered;
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self._localStoreMessages({
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folder: folder.path,
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emails: [storedMsg]
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emails: [storedMessage]
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}, function(err) {
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if (err) {
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self._account.busy = false;
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@ -519,11 +524,11 @@ define(function(require) {
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}
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// after the metadata of the encrypted object has changed, proceed with the live object
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var liveMsg = _.findWhere(folder.messages, {
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uid: header.uid
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var inMemoryMessage = _.findWhere(folder.messages, {
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uid: imapHeader.uid
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});
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liveMsg.unread = header.unread;
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liveMsg.answered = header.answered;
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inMemoryMessage.unread = imapHeader.unread;
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inMemoryMessage.answered = imapHeader.answered;
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after();
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});
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@ -1018,7 +1018,7 @@ define(function(require) {
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expect(err).to.exist;
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expect(dao._account.busy).to.be.false;
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expect(dao._account.folders[0].messages).to.be.empty;
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expect(dao._account.folders[0].messages).to.not.be.empty;
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expect(localListStub.calledOnce).to.be.true;
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expect(imapListStub.calledOnce).to.be.true;
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expect(localDeleteStub.calledOnce).to.be.true;
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