public AddTopicViewModel(Topic topic)
{
_topicService = new LocalTopicsService();
CurrentTopic = topic;
_acceptCommand = new RelayCommand(async () => await SaveButtonPressed(), () => !string.IsNullOrWhiteSpace(_topicName));
FromTopic(topic);
}
private void HandleTopicAdded(Topic topic)
{
if (topic.IsDone)
{
_closedTopics.Add(topic);
}
else
{
_topics.Add(topic);
}
}
private void FromTopic(Topic topic)
{
if (null != topic && _topic != topic)
{
TopicName = topic.Title;
TopicDescription = topic.Description;
Priority = topic.Priority;
DueDate = topic.DueDate;
}
TopicName = "";
TopicDescription = "";
Priority = 1;
DueDate = null;
_topic = null;
}
private void HandleTopicUpdated(Topic topic)
{
if (_topics.Contains(topic))
{
var found = _topics.Single((t) => t.Key == topic.Key);
if (topic.IsDone)
{
_topics.Remove(found);
_closedTopics.Add(topic);
}
else
{
found.Description = topic.Description;
found.DueDate = topic.DueDate;
found.Priority = topic.Priority;
found.Title = topic.Title;
}
}
else if(_closedTopics.Contains(topic))
{
var found = _closedTopics.Single((t) => t.Key == topic.Key);
if (topic.IsDone)
{
found.Description = topic.Description;
found.DueDate = topic.DueDate;
found.Priority = topic.Priority;
found.Title = topic.Title;
}
else
{
_closedTopics.Remove(found);
_topics.Add(topic);
}
}
}
private async Task SaveButtonPressed()
{
if (null != _topic)
{
await _topicService.UpdateTopicAsync(_topic);
MessengerInstance.Send(new TopicUpdatedMessage(_topic));
}
else
{
var topic = new Topic(Guid.NewGuid().ToString(), TopicName, TopicDescription, Priority, DueDate);
await _topicService.AddTopicAsync(topic);
MessengerInstance.Send(new TopicAddedMessage(topic));
}
FromTopic(null);
}
public Task<Topic> UpdateTopicAsync(Topic topic)
{
return Task.Run(() => topic);
}
public Task<Topic> RemoveTopicAsync(Topic topic)
{
return Task.Run(() => topic);
}
public Task<Topic> AddTopicAsync(Topic topic)
{
return Task.Run(() => topic);
}