public AnswerDetailPage(int questionId)
{
_theAnswer = new AnswerInfo();
_questionId = questionId;
Title = "Possible Answer";
HtmlWebViewSource webSource = new HtmlWebViewSource();
webSource.BindingContext = _theAnswer;
webSource.SetBinding(HtmlWebViewSource.HtmlProperty, new Binding("AnswerBody"));
_theFullAnswer = new WebView {
Source = webSource,
VerticalOptions = LayoutOptions.FillAndExpand
};
Content = new StackLayout {
VerticalOptions = LayoutOptions.FillAndExpand,
Children =
{
_theFullAnswer
}
};
}
public async Task <AnswerInfo> GetAnswerForQuestion(int questionId)
{
if (!CrossConnectivity.Current.IsConnected)
{
throw new NoInternetException();
}
var decompressedContent = await this.CallAndDecompress(string.Format(ANSWER_URL, questionId));
var deserializedContent = JsonConvert.DeserializeObject <AnswerResponse> (decompressedContent);
AnswerInfo theAnswer = null;
if (deserializedContent != null && deserializedContent.items != null && deserializedContent.items.Count > 0)
{
var currAnswer = deserializedContent.items [0];
theAnswer = new AnswerInfo {
AnswerID = currAnswer.answer_id,
QuestionID = currAnswer.question_id,
AnswerBody = currAnswer.body
};
}
return(theAnswer);
}
protected async Task LoadAnswer(int questionId)
{
AnswerInfo currentAnswer = await BlobCache.LocalMachine.GetOrFetchObject <AnswerInfo> (
_questionId.ToString(),
async() => await new StackOverflowService().GetAnswerForQuestion(questionId),
DateTime.Now.AddDays(7)
);
if (currentAnswer != null)
{
_theAnswer.AnswerID = currentAnswer.AnswerID;
_theAnswer.QuestionID = currentAnswer.QuestionID;
_theAnswer.AnswerBody = currentAnswer.AnswerBody;
}
else
{
// Nothing found on the web or in the cache - so invalidate the cache - don't want null stored
await BlobCache.LocalMachine.InvalidateObject <AnswerInfo> (_questionId.ToString());
_theAnswer.AnswerBody = "No answer found on StackOverflow or in cache";
}
}