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);
}