private async Task<RootObject> GetJsonFeedAsync()
{
int post_count = 0;
HttpClient client = new HttpClient();
//TODO: save these also in temp state when downloaded otherwise it takes a while to start up
await this.CacheCategories(client);
await this.CacheTags(client);
try
{
String response = null;
response = await LoadFeedFromCache();
if (response == null)
{
#region Get the number of posts (apparently the JSON API doesn't support retrieving ONLY the post count)
// I used this URI because it returns the smallest amount of data
Uri post_count_uri = new Uri(App.BLOG_URL + "?json=get_recent_posts&include=id");
try
{
var post_count_response = await client.GetStringAsync(post_count_uri);
RootObject post_count_object = await JsonConvert.DeserializeObjectAsync<RootObject>(post_count_response);
post_count = post_count_object.count_total;
}
catch (Exception)
{
return null;
}
#endregion
Uri feedUri = new Uri(App.BLOG_URL + "?json=get_recent_posts&count=" + post_count);
response = await client.GetStringAsync(feedUri);
SaveFeedToCache(response); //Note: no need to wait here as resonse is read-only
var local = Windows.Storage.ApplicationData.Current.LocalSettings;
local.Values["lastFeedSave"] = DateTime.Now.ToString();
}
RootObject postList = await JsonConvert.DeserializeObjectAsync<RootObject>(response);
RootObject feedData = new RootObject();
//Update the tile with the most recent posts
//For the moment, just do the first one.
//Boolean tileUpdated = false;
foreach (Post post in postList.posts)
{
if (post.title != null)
{
/*if (!tileUpdated) //J: Do we need this anymore? Already defined in app.xaml.cs
{
TileUpdater updater = Windows.UI.Notifications.TileUpdateManager.CreateTileUpdaterForApplication();
updater.StartPeriodicUpdate(new Uri("http://www.kraigbrockschmidt.com/blog/tileupdate.php"), PeriodicUpdateRecurrence.Hour);
}*/
post.title = post.title.Replace("“", "\"");
post.title = post.title.Replace("”", "\"");
post.title = post.title.Replace("″", "\"");
post.title = post.title.Replace("…", "...");
post.title = post.title.Replace("&", "&");
post.title = post.title.Replace("’", "'");
post.title = post.title.Replace("–", "-");
post.title = post.title.Replace("<", "<");
post.title = post.title.Replace(">", ">");
}
post.real_comment_count = post.comments.Count.ToString() + " comments";
feedData.posts.Add(post);
}
return feedData;
}
catch (Exception)
{
return null;
}
}
private async Task<RootObject> GetJsonFeedAsync(string filter, string index)
{
int post_count = 0;
System.Net.Http.HttpClient client = new HttpClient();
#region Get the number of posts (apparently the JSON API doesn't support retrieving ONLY the post count)
Uri post_count_uri;
if (filter == "category")
post_count_uri = new Uri(App.BLOG_URL + "?json=get_category_posts&include=id&slug=" + index);
else if (filter == "tag")
post_count_uri = new Uri(App.BLOG_URL + "?json=get_tag_posts&include=id&slug=" + index);
else if (filter == "date")
post_count_uri = new Uri(App.BLOG_URL + "?json=get_date_posts&include=id&date=" + index);
else
post_count_uri = new Uri(App.BLOG_URL + "?json=get_search_results&include=id&search=" + index);
try
{
var post_count_response = await client.GetStringAsync(post_count_uri);
RootObject post_count_object = await JsonConvert.DeserializeObjectAsync<RootObject>(post_count_response);
post_count = post_count_object.count_total;
}
catch (Exception)
{
return null;
}
#endregion
Uri feedUri;
if (filter == "category")
feedUri = new Uri(App.BLOG_URL + "?json=get_category_posts&slug=" + index + "&count=" + post_count);
else if (filter == "tag")
feedUri = new Uri(App.BLOG_URL + "?json=get_tag_posts&slug=" + index + "&count=" + post_count);
else if (filter == "date")
feedUri = new Uri(App.BLOG_URL + "?json=get_date_posts&date=" + index + "&count=" + post_count);
else
feedUri = new Uri(App.BLOG_URL + "?json=get_search_results&search=" + index + "&count=" + post_count);
try
{
var response = await client.GetStringAsync(feedUri);
RootObject postList = await JsonConvert.DeserializeObjectAsync<RootObject>(response);
RootObject feedData = new RootObject();
foreach (Post post in postList.posts)
{
if (post.title != null)
{
post.title = post.title.Replace("“", "\"");
post.title = post.title.Replace("”", "\"");
post.title = post.title.Replace("″", "\"");
post.title = post.title.Replace("…", "...");
post.title = post.title.Replace("&", "&");
post.title = post.title.Replace("’", "'");
post.title = post.title.Replace("–", "-");
post.title = post.title.Replace("<", "<");
post.title = post.title.Replace(">", ">");
}
post.real_comment_count = post.comments.Count.ToString() + " comments";
feedData.posts.Add(post);
}
return feedData;
}
catch (Exception)
{
return null;
}
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
protected async override void LoadState(Object navigationParameter, Dictionary <String, Object> pageState)
{
navParam = navigationParameter as postDate;
pageTitle.Text = "Posts for " + navParam.month_name + " " + navParam.year;
ViewCommentsButton.Visibility = Visibility.Collapsed;
progressRing.Visibility = Visibility.Visible;
Windows.UI.Xaml.Media.Animation.Storyboard sb =
this.FindName("PopInStoryBoard") as Windows.UI.Xaml.Media.Animation.Storyboard;
if (sb != null)
{
sb.Begin();
}
// TODO: Assign a bindable group to this.DefaultViewModel["Group"]
// TODO: Assign a collection of bindable items to this.DefaultViewModel["Items"]
FeedDataSource feedDataSource = (FeedDataSource)App.Current.Resources["feedDataSource"];
if (feedDataSource != null)
{
await feedDataSource.GetFeedsAsync("date", navParam.year + navParam.month);
}
RootObject feedData = FeedDataSource.GetFeed();
if (feedData != null)
{
this.DefaultViewModel["Feed"] = feedData;
this.DefaultViewModel["Items"] = feedData.posts;
if (feedData.posts.Count == 0)
{
itemTitle.Text = "There are no posts yet.";
}
}
if (pageState == null)
{
// When this is a new page, select the first item automatically unless logical page
// navigation is being used (see the logical page navigation #region below.)
if (!this.UsingLogicalPageNavigation() && this.itemsViewSource.View != null)
{
this.itemsViewSource.View.MoveCurrentToFirst();
}
else
{
//this.itemsViewSource.View.MoveCurrentToPosition(-1);
}
}
else
{
// Restore the previously saved state associated with this page
if (pageState.ContainsKey("SelectedItem") && this.itemsViewSource.View != null)
{
// TODO: Invoke this.itemsViewSource.View.MoveCurrentTo() with the selected
// item as specified by the value of pageState["SelectedItem"]
string itemTitle = (string)pageState["SelectedItem"];
Post selectedItem = FeedDataSource.GetItem(itemTitle);
this.itemsViewSource.View.MoveCurrentTo(selectedItem);
}
}
if (feedData.posts.Count == 0)
{
ViewCommentsButton.Visibility = Visibility.Collapsed;
}
else
{
ViewCommentsButton.Visibility = Visibility.Visible;
}
progressRing.Visibility = Visibility.Collapsed;
}
