public async Task RefreshAsync(bool saveNewQuestions = true)
{
// Load tags from file
var localTags = await _LocalStorageService.LoadFromFileAsync <ObservableCollection <string> >("tags.json");
if (localTags != null)
{
Tags = localTags;
}
if (Tags.Count == 0)
{
// Preset some tags
Tags.Add("windows-10");
Tags.Add("office365");
Tags.Add("azure");
}
// Load questions for all tags
var questionLists = new List <IEnumerable <Question> >();
foreach (var tag in Tags)
{
var questionsForTag = await _StackOverflowService.GetUnansweredQuestionByTag(tag);
questionLists.Add(questionsForTag);
}
// Merge and oder questions, remove dublicates
var orderedQuestions = _StackOverflowService.MergeQuestions(questionLists);
// Mark new questions
var oldQuestions = await _LocalStorageService.LoadFromFileAsync <ObservableCollection <Question> >("questions.json");
if (oldQuestions != null)
{
NewQuestionCount = _StackOverflowService.MarkNewQuestions(orderedQuestions, oldQuestions);
}
// Sync questions with ViewModel
Questions = new ObservableCollection <Question>(orderedQuestions);
// Save questions locally
if (saveNewQuestions)
{
await _LocalStorageService.SaveToFileAsync("questions.json", Questions);
}
}
