public async Task LoadFoldersAsync(Config config, string tilde, CancellationToken cancellationToken)
{
var folders = await this.FetchFoldersAsync(config, tilde, cancellationToken);
this.folders = new ConcurrentDictionary<string, Folder>(folders.Select(x => new KeyValuePair<string, Folder>(x.FolderId, x)));
this.OnFoldersChanged();
}
private async Task<IEnumerable<Folder>> FetchFoldersAsync(Config config, string tilde, CancellationToken cancellationToken)
{
// If the folder is invalid for any reason, we'll ignore it.
// Again, there's the potential for duplicate folder IDs (if the user's been fiddling their config).
// In this case, there's nothing really sensible we can do. Just pick one of them :)
var folderConstructionTasks = config.Folders
.Where(x => String.IsNullOrWhiteSpace(x.Invalid))
.DistinctBy(x => x.ID)
.Select(async folder =>
{
var ignores = await this.FetchFolderIgnoresAsync(folder.ID, cancellationToken);
var syncState = await this.FetchFolderSyncStateAsync(folder.ID, cancellationToken);
var path = folder.Path;
if (path.StartsWith("~"))
path = Path.Combine(tilde, path.Substring(1).TrimStart(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar));
return new Folder(folder.ID, path, syncState, new FolderIgnores(ignores.IgnorePatterns, ignores.RegexPatterns));
});
cancellationToken.ThrowIfCancellationRequested();
var folders = await Task.WhenAll(folderConstructionTasks);
return folders;
}
public ConfigSavedEventArgs(Config config)
{
this.Config = config;
}
public async Task ReloadFoldersAsync(Config config, string tilde, CancellationToken cancellationToken)
{
var folders = await this.FetchFoldersAsync(config, tilde, cancellationToken);
var newFolders = new ConcurrentDictionary<string, Folder>();
var existingFolders = this.folders;
// Maybe nothing changed?
if (existingFolders.Values.SequenceEqual(folders))
return;
var changeNotifications = new List<Action>();
// Re-use the existing folder object if possible
foreach (var folder in folders)
{
Folder existingFolder;
if (existingFolders.TryGetValue(folder.FolderId, out existingFolder))
{
if (existingFolder.SyncState != folder.SyncState)
{
changeNotifications.Add(() => this.OnSyncStateChanged(folder, existingFolder.SyncState, folder.SyncState));
existingFolder.SyncState = folder.SyncState;
}
newFolders[folder.FolderId] = existingFolder;
}
else
{
newFolders[folder.FolderId] = folder;
}
}
this.folders = newFolders;
foreach (var changeNotification in changeNotifications)
{
changeNotification();
}
this.OnFoldersChanged();
}
private void OnConfigSaved(Config config)
{
this.ConfigSaved?.Invoke(this, new ConfigSavedEventArgs(config));
}