public override Dictionary <long, string> Synchronize(FolderCollection foldersTree)
{
DbStorage dbStorage = DbStorageCreator.CreateDatabaseStorage(_account);
FolderCollection folders = new FolderCollection();
FolderCollection.CreateFolderListFromTree(ref folders, foldersTree);
ArrayList pop3Uids = new ArrayList();
bool downloadErrorOccured = false;
Folder fld = folders[FolderType.Inbox];
if (fld != null)
{
if (fld.SyncType == FolderSyncType.DirectMode)
{
if (!_updatedFolders.ContainsKey(fld.ID))
{
_updatedFolders.Add(fld.ID, fld.FullPath);
}
return(_updatedFolders);
}
if (fld.SyncType == FolderSyncType.DontSync)
{
return(_updatedFolders);
}
try
{
dbStorage.Connect();
// get new messages start index
string[] pop3DbUids = dbStorage.GetUids();
string[] pop3ServerUids = _pop3Obj.GetMessageUids();
ArrayList dbUidsToDelete = new ArrayList();
ArrayList pop3ServerIndexesToDownload = new ArrayList();
foreach (string pop3DbUid in pop3DbUids)
{
if (Array.IndexOf(pop3ServerUids, pop3DbUid) == -1)
{
dbUidsToDelete.Add(pop3DbUid);
}
}
foreach (string pop3ServerUid in pop3ServerUids)
{
if (Array.IndexOf(pop3DbUids, pop3ServerUid) == -1)
{
pop3ServerIndexesToDownload.Add(_pop3Obj.GetMessageIndexFromUid(pop3ServerUid));
}
}
if ((_account.MailMode == MailMode.KeepMessagesOnServer) ||
(_account.MailMode == MailMode.KeepMessagesOnServerAndDeleteMessageWhenItsRemovedFromTrash))
{
object[] serverUidsToDelete = dbStorage.GetOldMessagesUids(_account.MailsOnServerDays);
// delete from server
if (serverUidsToDelete.Length > 0)
{
DeleteMessages(serverUidsToDelete, fld);
}
}
// retrieve new messages
GetNewMessagesFromServerAndSaveToDb(dbStorage, fld, (int[])pop3ServerIndexesToDownload.ToArray(typeof(int)), out downloadErrorOccured, ref pop3Uids);
if ((fld.SyncType == FolderSyncType.NewEntireMessages) ||
(fld.SyncType == FolderSyncType.NewHeadersOnly))
{
return(_updatedFolders);
}
// delete messages from db
if (dbUidsToDelete.Count > 0)
{
WebMailMessageCollection msgsToDelete = dbStorage.LoadMessagesByUids((string[])dbUidsToDelete.ToArray(typeof(string)), fld, false);
dbStorage.DeleteMessages(msgsToDelete.ToIDsCollection(), fld);
if (!_updatedFolders.ContainsKey(fld.ID))
{
_updatedFolders.Add(fld.ID, fld.FullPath);
}
}
}
finally
{
if (!downloadErrorOccured)
{
// get all uids and save it to db
pop3Uids = ArrayList.Adapter(_pop3Obj.GetMessageUids());
dbStorage.ReplaceUids(pop3Uids.ToArray());
}
else
{
dbStorage.SaveUids(pop3Uids.ToArray());
}
dbStorage.Disconnect();
}
}
return(_updatedFolders);
}