private MessageNode[] BuildTopicTree(
IReadOnlyDictionary <int, MessageInfo[]> messageMap,
int level,
TopicNode topic,
MessageNode parent)
{
if (!messageMap.TryGetValue(parent.Message.ID, out var children))
{
return(Array.Empty <MessageNode>());
}
level += 1;
return(children
.Select(c =>
{
var res = new MessageNode(c.IsRead, MarkMessageReadAsync)
{
Message = c,
Level = level,
TopicNode = topic,
ParentNode = parent
};
res.Children = BuildTopicTree(messageMap, level, topic, res);
return res;
})
.ToArray());
}
private async Task LoadRepliesAsync(TopicNode topic)
{
var messageMap =
(await _api.Client.Messages.GetMessagesAsync(topicID: topic.Message.ID, withRates: true, withReadMarks: true))
.Items
.GroupBy(m => m.ParentID)
.ToDictionary(grp => grp.Key, grp => grp.ToArray());
topic.Children = BuildTopicTree(messageMap, 0, topic, topic);
topic.IsLoaded = true;
}