private static IAsyncAction LoadAsync()
{
return(AsyncInfo.Run(async(cancellationToken) =>
{
if (rootObject != null && readList != null)
{
// File already loaded, there is nothing to do.
return;
}
string jsonString = await FilesManager.LoadAsync(storageFolder, FileName);
if (!JsonObject.TryParse(jsonString, out rootObject))
{
Debug.WriteLine("Invalid JSON object in {0}", FileName);
CreateFromScratch();
return;
}
if (!rootObject.ContainsKey(ReadListKey))
{
CreateFromScratch();
return;
}
readList = rootObject.GetNamedArray(ReadListKey);
}));
}
public static IAsyncAction LoadAndDisplayTagOptionsAsync(ListView listView, string apiSiteParameter)
{
return(AsyncInfo.Run(async(cancellationToken) =>
{
// Create a unique file name per website.
string tagsFileName = "tags." + apiSiteParameter + ".json";
string content = await FilesManager.LoadAsync(storageFolder, tagsFileName);
if (String.IsNullOrEmpty(content))
{
// Get content from the web.
string customUriString = String.Format(tagsUriString, apiSiteParameter);
content = await LoadFromWeb(customUriString);
if (String.IsNullOrEmpty(content))
{
// No content found, there is nothing else to do.
return;
}
// Save it locally.
await FilesManager.SaveAsync(storageFolder, tagsFileName, content);
}
// Parse content.
JsonObject jsonObject;
if (!JsonObject.TryParse(content, out jsonObject))
{
Debug.WriteLine("Invalid JSON oject: {0}", content);
return;
}
if (!jsonObject.ContainsKey("items"))
{
Debug.WriteLine("No items value.");
return;
}
JsonArray tagsArray = jsonObject.GetNamedArray("items");
foreach (IJsonValue jsonValue in tagsArray)
{
var option = new BindableTagOption(jsonValue.GetObject());
listView.Items.Add(option);
}
}));
}
public static IAsyncAction LoadAndDisplayWebsitesAsync(ListView listView)
{
return(AsyncInfo.Run(async(cancellationToken) =>
{
string content = await FilesManager.LoadAsync(storageFolder, websitesFileName);
if (String.IsNullOrEmpty(content))
{
// Get content from the web.
content = await LoadFromWeb(websitesUriString);
if (String.IsNullOrEmpty(content))
{
// No content found, there is nothing else to do.
return;
}
// Save it locally.
await FilesManager.SaveAsync(storageFolder, websitesFileName, content);
}
// Parse content.
JsonObject jsonObject;
if (!JsonObject.TryParse(content, out jsonObject))
{
Debug.WriteLine("Invalid JSON object in {0}", websitesFileName);
return;
}
if (!jsonObject.ContainsKey("items"))
{
Debug.WriteLine("No items value.");
return;
}
JsonArray websitesArray = jsonObject.GetNamedArray("items");
foreach (IJsonValue jsonValue in websitesArray)
{
var option = new BindableWebsiteOption(jsonValue.GetObject());
if (option.IsListable)
{
listView.Items.Add(option);
}
}
}));
}
public static IAsyncAction SaveAsync()
{
Task saveTask = FilesManager.SaveAsync(storageFolder, FileName, rootObject.Stringify());
return(saveTask.AsAsyncAction());
}