public virtual async Task SetReadStatusAsync(List <MailMessage> messages, bool read)
{
List <MailMessage> changedMessages = new List <MailMessage>(messages.Count);
foreach (var message in messages)
{
if (message.Seen != read)
{
// Update in memory
message.Seen = read;
if (MailStorage.HasMessageFlags(message.GetThreadId(), message.GetMessageId()))
{
// Update on disk
await MailStorage.StoreMessageFlagsAsync(message);
}
changedMessages.Add(message);
}
}
// TODO: Queue command to send change to the server
if (changedMessages.Count > 0)
{
await GmailImap.SetReadStatusAsync(changedMessages, read);
}
}
public async Task OpenAttachmentAsync(MailMessage message, Attachment attachment)
{
// Lazy load
if (attachment.Scope < Scope.HeadersAndBody)
{
// Check local storage
if (MailStorage.HasMessagePart(message.GetThreadId(), message.GetMessageId(), attachment.BodyId))
{
// TODO: Can we open the attachment directly from isolated storage?
attachment.Body = await MailStorage.GetMessagePartAsync(message.GetThreadId(), message.GetMessageId(), attachment.BodyId);
}
else
{
// Download from the network
await GmailImap.GetBodyPartAsync(message.Uid, attachment, async() =>
{
if (ActiveLabel.Info.StoreMessages && ActiveLabel.Info.StoreAttachments)
{
await MailStorage.StoreMessagePartAsync(message.GetThreadId(), message.GetMessageId(), attachment.BodyId, attachment.Body);
}
}, CancellationToken.None);
}
}
StorageFile file = await MailStorage.SaveAttachmentToTempAsync(attachment);
// http://architects.dzone.com/articles/lap-around-windows-phone-8-sdk
await Launcher.LaunchFileAsync(file);
// TODO: Delete temp files on app close?
}
public virtual async Task <Label> GetLabelAsync(bool forceSync = false)
{
// From memory
if (!forceSync && ActiveLabel != null && ActiveLabel.Conversations != null)
{
return(ActiveLabel);
}
if (ActiveLabel == null)
{
List <LabelInfo> labels = await GetLabelsAsync();
ActiveLabel = new Label()
{
Info = labels.Where(info => info.Name.Equals(GConstants.Inbox)).First()
};
}
if (ActiveLabel.Conversations == null && ActiveLabel.Info.StoreMessages)
{
// From disk
ActiveLabel.Conversations = await MailStorage.GetConversationsAsync(ActiveLabel.Info.Name, Scope.HeadersAndMime);
}
if (!forceSync && ActiveLabel.Conversations != null)
{
return(ActiveLabel);
}
if (!forceSync && !ActiveLabel.Info.StoreMessages)
{
// Don't sync non-stored labels by default. Require force sync.
return(ActiveLabel);
}
if (ActiveLabel.Info.StoreMessages)
{
await SyncMessageHeadersAsync(CancellationToken.None);
await SyncMessageBodiesAsync(CancellationToken.None);
if (ActiveLabel.Info.StoreAttachments)
{
await SyncAttachmentsAsync(CancellationToken.None);
}
ActiveLabel.Conversations = await MailStorage.GetConversationsAsync(ActiveLabel.Info.Name, Scope.HeadersAndMime);
}
else
{
// Allow us to view mail without storing it to disk.
// TODO: Consider downloading only headers and then downloading the body & attachments if we open it.
List <ConversationThread> serverConversations = await GmailImap.GetConversationsAsync(Scope.HeadersAndMime,
range : Info.Range, cancellationToken : CancellationToken.None);
ActiveLabel.Conversations = serverConversations;
}
return(ActiveLabel);
}
public async Task LogoutAsync()
{
await GmailImap.Client.LogoutAsync();
GmailImap.Dispose();
GmailImap = new GmailImapClient(Info.Address, Info.Password);
ActiveLabel = null;
}
// Removing labels for the non-active mailboxes is a bit more work. We must:
// - Switch to that mailbox
// - Find the message mailbox UID for that message
// -- Search storage first, then online
// - Delete the message from the mailbox & storage
// - Switch back to the original mailbox
private async Task RemoveOtherLabelAsync(List <MailMessage> messages, string labelName)
{
List <MailMessage> changedMessages = new List <MailMessage>();
// Remove the label from the messages and store the changes.
// TODO: Remove message from disk if the message is no longer referenced by any sync'd labels.
foreach (var message in messages)
{
if (message.RemoveLabel(labelName))
{
changedMessages.Add(message);
if (MailStorage.HasMessageLables(message.GetThreadId(), message.GetMessageId()))
{
// Update on disk
await MailStorage.StoreMessageLabelsAsync(message);
}
}
}
LabelInfo labelInfo = Labels.Where(info => info.Name.Equals(labelName)).FirstOrDefault() ?? new LabelInfo()
{
Name = labelName
};
// Look up UIDs. If they're not here, we may need to check online.
List <string> localMessageIds = new List <string>(); // Ids for messages we have referenced from a locally sync'd label.
List <string> nonlocalMessageIds = new List <string>(); // Ids for messages we'll have to lookup online.
List <MessageIdInfo> labelMessageIds = (labelInfo.StoreMessages ? await MailStorage.GetLabelMessageListAsync(labelName) : null)
?? new List <MessageIdInfo>();
SyncUtilities.CompareLists(changedMessages.Select(message => message.GetMessageId()), labelMessageIds.Select(ids => ids.MessageId), id => id,
(searchId, localId) => localMessageIds.Add(localId),
(searchId) => nonlocalMessageIds.Add(searchId),
(localId) => { } // Only in storage, ignore.
);
// Remove from that labelList
List <MessageIdInfo> updatedLabelMessageIds = labelMessageIds.Where(messageIds => !localMessageIds.Contains(messageIds.MessageId)).ToList();
if (labelInfo.StoreMessages)
{
await MailStorage.StoreLabelMessageListAsync(labelName, updatedLabelMessageIds);
}
List <string> uidsToRemove = labelMessageIds.Where(messageIds => localMessageIds.Contains(messageIds.MessageId)).Select(ids => ids.Uid).ToList();
// TODO: Queue up this action for later
if (nonlocalMessageIds.Count > 0)
{
List <string> remoteUids = await GmailImap.GetUidsFromMessageIds(labelName, nonlocalMessageIds);
uidsToRemove.AddRange(remoteUids);
}
if (uidsToRemove.Count > 0)
{
await GmailImap.RemoveOtherLabelAsync(labelName, uidsToRemove);
}
}
public virtual Task SelectLabelAsync(LabelInfo label)
{
if (ActiveLabel == null || !label.Name.Equals(ActiveLabel.Info.Name))
{
ActiveLabel = new Label()
{
Info = label
};
// TODO: Put in command queue and run later.
return(GmailImap.SelectLabelAsync(label.Name));
}
return(Task.FromResult(0));
}
public virtual async Task <List <LabelInfo> > GetLabelsAsync(bool forceSync = false)
{
// From memory
if (!forceSync && Labels != null && Labels.Count != 0)
{
return(Labels);
}
// From disk
Labels = await MailStorage.GetLabelInfoAsync() ?? new List <LabelInfo>();
if (!forceSync && Labels.Count != 0)
{
return(Labels);
}
if (Labels.Count == 0)
{
// Default label settings for a new account
Labels.Add(new LabelInfo()
{
Name = GConstants.Inbox, StoreMessages = true
});
}
// Sync with server
List <LabelInfo> final = new List <LabelInfo>();
Mailbox[] serverMailboxes = await GmailImap.GetLabelsAsync();
IEnumerable <LabelInfo> serverLabels = serverMailboxes.Select(box => new LabelInfo()
{
Name = box.Name
});
await SyncUtilities.CompareListsAsync <LabelInfo>(serverLabels, Labels,
label => label.Name, // Select key
async (serverLabel, clientLabel) => final.Add(clientLabel), // Match, client wins, it has client side settings.
async (serverLabel) => final.Add(serverLabel), // Server only, add.
(clientLabel) => MailStorage.DeleteLabelMessageListAsync(clientLabel.Name)); // Client side only, garbage collect.
Labels = final;
// Save back to storage
await MailStorage.SaveLabelInfoAsync(Labels);
return(Labels);
}
// TODO: Full delete items already in Trash or Spam?
public virtual async Task TrashAsync(List <MailMessage> messages, bool isSpam)
{
string labelName = isSpam ? "[Gmail]/Spam" : "[Gmail]/Trash";
foreach (var message in messages)
{
// TODO: Remove from all label lists? Add to trash label list if sync'd?
message.AddLabel(labelName);
if (MailStorage.HasMessageLables(message.GetThreadId(), message.GetMessageId()))
{
// Update on disk
await MailStorage.StoreMessageLabelsAsync(message);
}
}
// TODO: Queue command to send change to the server
await GmailImap.AddLabelAsync(messages, labelName);
}
// It's assumed that labelName is never the active label.
public virtual async Task AddLabelAsync(List <MailMessage> messages, string labelName)
{
foreach (var message in messages)
{
// Store in memory
message.AddLabel(labelName);
if (MailStorage.HasMessageLables(message.GetThreadId(), message.GetMessageId()))
{
// Update on disk
await MailStorage.StoreMessageLabelsAsync(message);
}
// TODO: Store in the message list for that label
}
// TODO: Queue command to send change to the server
await GmailImap.AddLabelAsync(messages, labelName);
}
public async Task SetStarAsync(IEnumerable <MailMessage> messages, bool starred)
{
messages = messages.Where(message => message.Flagged != starred).ToList();
// Set or remove the Flagged flag.
foreach (MailMessage message in messages)
{
message.Flagged = starred;
if (MailStorage.HasMessageFlags(message.GetThreadId(), message.GetMessageId()))
{
// Update on disk
await MailStorage.StoreMessageFlagsAsync(message);
}
}
if (messages.Any())
{
// TODO: Queue command to send change to the server
await GmailImap.SetFlaggedStatusAsync(messages, starred);
}
}
public virtual async Task LazyLoadBodyPartAsync(MailMessage message, ObjectWHeaders part)
{
if (part.Scope < Scope.HeadersAndBody)
{
if (MailStorage.HasMessagePart(message.GetThreadId(), message.GetMessageId(), part.BodyId))
{
part.Body = await MailStorage.GetMessagePartAsync(message.GetThreadId(), message.GetMessageId(), part.BodyId);
}
else
{
await GmailImap.GetBodyPartAsync(message.Uid, part, async() =>
{
if (ActiveLabel.Info.StoreMessages)
{
await MailStorage.StoreMessagePartAsync(message.GetThreadId(), message.GetMessageId(), part.BodyId, part.Body);
}
}, CancellationToken.None);
}
}
}
// Removing the label for the currently active mailbox is easy, we just flag
// the message as deleted in the active mailbox.
private async Task RemoveCurrentLabelAsync(List <MailMessage> messages)
{
string label = ActiveLabel.Info.Name;
// Remove from label message list.
IEnumerable <string> removedThreadIds = messages.Select(message => message.GetThreadId()).Distinct();
ActiveLabel.Conversations = ActiveLabel.Conversations.Where(conversation => !removedThreadIds.Contains(conversation.ID)).ToList();
await MailStorage.StoreLabelMessageListAsync(label, ActiveLabel.Conversations);
// TODO: If this was the last sync'd label, remove from storage.
// Update the messages to remove the label.
foreach (MailMessage message in messages)
{
if (message.RemoveLabel(label) && MailStorage.HasMessageLables(message.GetThreadId(), message.GetMessageId()))
{
// Store changes
await MailStorage.StoreMessageLabelsAsync(message);
}
}
// Labels are deleted by deleting the message from the associated mailbox.
await GmailImap.RemoveCurrentLabelAsync(messages);
}
// Examine the local data store to see if there are any attachment bodies that still need to be downloaded.
public async Task SyncAttachmentsAsync(CancellationToken cancellationToken)
{
List <MessageIdInfo> localIds = await MailStorage.GetLabelMessageListAsync(ActiveLabel.Info.Name) ?? new List <MessageIdInfo>();
List <KeyValuePair <MessageIdInfo, ObjectWHeaders> > attachmentsToDownload = new List <KeyValuePair <MessageIdInfo, ObjectWHeaders> >();
foreach (MessageIdInfo ids in localIds)
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
MailMessage headers = await MailStorage.GetMessageHeadersAsync(ids.ThreadId, ids.MessageId);
if (headers == null)
{
// Downloading headers should have happened elsewhere.
continue;
}
if (headers.HasMutipartBody)
{
foreach (Attachment attachment in headers.Attachments)
{
if (!MailStorage.HasMessagePart(ids.ThreadId, ids.MessageId, attachment.BodyId))
{
attachmentsToDownload.Add(new KeyValuePair <MessageIdInfo, ObjectWHeaders>(ids, attachment));
}
}
}
}
if (cancellationToken.IsCancellationRequested)
{
return;
}
// TODO: Batch by bodyId?
foreach (var pair in attachmentsToDownload)
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
// TODO: Consider streaming the body directly to disk. Even more so for attachments.
await GmailImap.GetBodyPartAsync(pair.Key.Uid, pair.Value,
async() =>
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
await MailStorage.StoreMessagePartAsync(pair.Key.ThreadId, pair.Key.MessageId, pair.Value.BodyId, pair.Value.Body);
// Release the body for GC. Otherwise the bodiesToDownload list will keep everything im memory.
pair.Value.Body = null;
}, cancellationToken);
}
}
// Examine the local data store to see if there are any message bodies that still need to be downloaded.
public async Task SyncMessageBodiesAsync(CancellationToken cancellationToken)
{
List <MessageIdInfo> localIds = await MailStorage.GetLabelMessageListAsync(ActiveLabel.Info.Name) ?? new List <MessageIdInfo>();
List <KeyValuePair <MessageIdInfo, ObjectWHeaders> > bodiesToDownload = new List <KeyValuePair <MessageIdInfo, ObjectWHeaders> >();
foreach (MessageIdInfo ids in localIds)
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
MailMessage headers = await MailStorage.GetMessageHeadersAsync(ids.ThreadId, ids.MessageId);
if (headers == null)
{
// Downloading headers should have happened elsewhere.
continue;
}
if (headers.HasMutipartBody)
{
foreach (Attachment view in headers.AlternateViews)
{
if (!MailStorage.HasMessagePart(ids.ThreadId, ids.MessageId, view.BodyId))
{
bodiesToDownload.Add(new KeyValuePair <MessageIdInfo, ObjectWHeaders>(ids, view));
}
}
// Attachments will be downloaded seperately as well.
// TODO: but maybe we could build the list here while we're looking?
}
else
{
// Primary body, no attachments or alternate views
if (!MailStorage.HasMessagePart(ids.ThreadId, ids.MessageId, headers.BodyId))
{
bodiesToDownload.Add(new KeyValuePair <MessageIdInfo, ObjectWHeaders>(ids, headers));
}
}
}
if (cancellationToken.IsCancellationRequested)
{
return;
}
// TODO: Batch
foreach (var pair in bodiesToDownload)
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
// TODO: Consider only downloading the first X bytes of each message, and loading more only on demand.
// TODO: Consider streaming the body directly to disk. Even more so for attachments.
await GmailImap.GetBodyPartAsync(pair.Key.Uid, pair.Value,
async() =>
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
await MailStorage.StoreMessagePartAsync(pair.Key.ThreadId, pair.Key.MessageId, pair.Value.BodyId, pair.Value.Body);
// Release the body for GC. Otherwise the bodiesToDownload list will keep everything im memory.
pair.Value.Body = null;
}, cancellationToken);
}
}
// Determine oldest date: Now - Range
// Query server for ids of messages in folder since oldest date (async while loading local list?)
// Load stored message list (Ids only)
// For each new item in the remote list:
// - Download & save headers, flags, & labels, add to local list, save (TODO: What if another label already had this message?)
// - Anything that is unread counts as new mail. It wasn't downloaded last time we opened the app, so the message date is irrelevant.
// - Queue body and attachments for download later.
// For each item that was already in the local list
// - query for updated flags and labels
// - Anything that is unread since the last time we opened the app counts as new mail.
// - Queue body and attachments for download later (if they weren't downloaded on a previous sync)
public async Task <int> SyncMessageHeadersAsync(CancellationToken cancellationToken)
{
DateTime syncMailSince = DateTime.Now - Info.Range;
Task <IList <GmailMessageInfo> > remoteMessageInfoTask = GmailImap.GetCurrentMessageIdsAsync(syncMailSince);
List <MessageIdInfo> localIds = await MailStorage.GetLabelMessageListAsync(ActiveLabel.Info.Name) ?? new List <MessageIdInfo>();
IList <GmailMessageInfo> remoteMessageInfos = await remoteMessageInfoTask;
IEnumerable <MessageIdInfo> remoteIds = remoteMessageInfos.Select(info => new MessageIdInfo()
{
Uid = info.Uid,
MessageId = info.MessageId,
ThreadId = info.ThreadId,
});
DateTime lastAppActivation = AppSettings.LastAppActivationTime;
int newMessages = remoteMessageInfos
.Where(info => info.Date > lastAppActivation && !info.Flags.Contains(@"\Seen")).Count();
IList <MessageIdInfo> messagesInBothPlaces = new List <MessageIdInfo>();
IList <MessageIdInfo> messagesOnlyRemote = new List <MessageIdInfo>();
IList <MessageIdInfo> messagesOnlyLocal = new List <MessageIdInfo>();
IList <MessageIdInfo> messageHeadersToDownload = new List <MessageIdInfo>();
if (cancellationToken.IsCancellationRequested)
{
return(newMessages);
}
SyncUtilities.CompareLists(remoteIds, localIds, info => info.Uid,
(remote, local) => messagesInBothPlaces.Add(local),
remoteOnly => messagesOnlyRemote.Add(remoteOnly),
localOnly => messagesOnlyLocal.Add(localOnly));
if (cancellationToken.IsCancellationRequested)
{
return(newMessages);
}
bool localMessageListModified = false;
foreach (MessageIdInfo idInfo in messagesOnlyRemote)
{
// Check if the item is already on disk (from another label)
if (MailStorage.HasMessageHeaders(idInfo.ThreadId, idInfo.MessageId))
{
// If so, update the labels and flags.
messagesInBothPlaces.Add(idInfo);
}
// If not, download the headers / message structure.
else
{
messageHeadersToDownload.Add(idInfo);
}
// Add to labe's list.
localIds.Add(idInfo);
localMessageListModified = true;
}
if (messageHeadersToDownload.Count > 0)
{
// Bulk download headers
await GmailImap.GetEnvelopeAndStructureAsync(messageHeadersToDownload.Select(ids => ids.Uid),
async data =>
{
// Find the matching Ids
string messageId = data.GetMessageId();
GmailMessageInfo info = remoteMessageInfos.First(infos => infos.MessageId.Equals(messageId));
if (cancellationToken.IsCancellationRequested)
{
return;
}
// Save headers, labels, and flags to disk
await MailStorage.StoreMessageFlagsAsync(info.ThreadId, info.MessageId, info.Flags);
await MailStorage.StoreMessageLabelsAsync(info.ThreadId, info.MessageId, info.Labels);
await MailStorage.StoreMessageHeadersAsync(data);
},
cancellationToken);
}
if (cancellationToken.IsCancellationRequested)
{
return(newMessages);
}
if (localMessageListModified)
{
await MailStorage.StoreLabelMessageListAsync(ActiveLabel.Info.Name, localIds);
}
foreach (MessageIdInfo idInfo in messagesInBothPlaces)
{
if (cancellationToken.IsCancellationRequested)
{
return(newMessages);
}
// Find the matching Ids
GmailMessageInfo info = remoteMessageInfos.First(infos => infos.MessageId.Equals(idInfo.MessageId));
// Update the labels and flags.
await MailStorage.StoreMessageFlagsAsync(info.ThreadId, info.MessageId, info.Flags);
await MailStorage.StoreMessageLabelsAsync(info.ThreadId, info.MessageId, info.Labels);
}
if (cancellationToken.IsCancellationRequested)
{
return(newMessages);
}
// Only remember our last sync time if we (mostly) finished.
ActiveLabel.Info.LastSync = DateTime.Now;
await SaveLabelSettingsAsync();
if (messagesOnlyLocal.Any())
{
// Remove deleted mails from label list
localIds = localIds.Except(messagesOnlyLocal).ToList();
await MailStorage.StoreLabelMessageListAsync(ActiveLabel.Info.Name, localIds);
// TODO: GC message data.
}
return(newMessages);
}
