public static IAsyncOperation <AddQuestionsResult> QueryTagAsync(string websiteUrl, string tagEncoded)
{
return(AsyncInfo.Run(async(cancellationToken) =>
{
// Retrieve questions, skip the LatestPubDate validation and add all questions.
AddQuestionsResult result = await FeedManager.QuerySingleWebsiteAsync(websiteUrl, tagEncoded, true);
// Only limit and save questions if list changed.
if (result.AddedQuestions > 0 || result.UpdatedQuestions > 0)
{
uint removedQuestions = await QuestionsManager.RemoveQuestionsInReadList();
await QuestionsManager.LimitTo150AndSaveAsync();
FeedManager.UpdateTileAndBadge();
}
return result;
}));
}
// 1. Load settings.
// 2. query -> Retrieve feeds.
// 3. skipLatestPubDate -> Add questions.
// 4. Sort questions (needed to show tile and badge).
// 5. Update tile.
// 6. Update badge.
// TODO: Maybe check for buzz words here.
public static IAsyncOperation <AddQuestionsResult> QueryWebsitesAsync()
{
return(AsyncInfo.Run(async(cancellationToken) =>
{
SettingsManager.Load();
await QuestionsManager.LoadAsync();
// Query websites in parallel.
List <Task <AddQuestionsResult> > tasks = new List <Task <AddQuestionsResult> >();
IEnumerable <string> keys = SettingsManager.GetWebsiteKeys();
foreach (string website in keys)
{
string query = SettingsManager.ConcatenateAllTags(website);
tasks.Add(QuerySingleWebsiteAsync(website, query, false).AsTask());
}
if (tasks.Count == 0)
{
// There is nothing to wait.
return new AddQuestionsResult();
}
await Task.Factory.ContinueWhenAll(tasks.ToArray(), (tasks2) => {});
// Add up the results.
AddQuestionsResult result = new AddQuestionsResult();
foreach (Task <AddQuestionsResult> task in tasks)
{
AddQuestionsResult taskResult = task.Result;
result.AddedQuestions += taskResult.AddedQuestions;
result.UpdatedQuestions += taskResult.UpdatedQuestions;
if (!taskResult.FileFound)
{
result.FileFound = false;
}
}
Debug.WriteLine(
"{0} questions added, {0} questions modified.",
result.AddedQuestions,
result.UpdatedQuestions);
// Only limit and save questions if list changed.
if (result.AddedQuestions > 0 || result.UpdatedQuestions > 0)
{
uint removedQuestions = await QuestionsManager.RemoveQuestionsInReadList();
await QuestionsManager.LimitTo150AndSaveAsync();
UpdateTileAndBadge();
SettingsManager.SaveLocal(); // Save updated latestPubDate.
}
// Update last query date-time, only if all queries were successful.
if (result.FileFound)
{
SettingsManager.LatestQueryDate = DateTimeOffset.Now;
}
return result;
}));
}
