/// <summary>
/// 升级缓存
/// </summary>
/// <param name="channels">需要缓存的页面列表</param>
/// <returns></returns>
private async Task AddCachePage(params CustomPage[] pages)
{
var list = pages.Distinct().ToArray();
var localFolder = ApplicationData.Current.LocalFolder;
var file = await localFolder.CreateFileAsync("CachePageList.json", CreationCollisionOption.OpenIfExists);
string content = await FileIO.ReadTextAsync(file);
if (string.IsNullOrEmpty(content))
{
content = "[]";
}
var results = JsonConvert.DeserializeObject <List <CacheModel> >(content);
var tasks = new List <Task>();
if (list.Length > 0)
{
foreach (var page in list)
{
tasks.Add(Task.Run(async() =>
{
var articles = await AppTools.GetSchemaFromPage(page, true);
int now = AppTools.DateToTimeStamp(DateTime.Now.ToLocalTime());
if (results.Any(p => p.Page.Id == page.Id))
{
var target = results.Where(p => p.Page.Id == page.Id).First();
target.Feeds = articles;
target.CacheTime = now;
}
else
{
results.Add(new CacheModel()
{
Page = page, Feeds = articles, CacheTime = now
});
}
}));
}
try
{
await Task.WhenAll(tasks.ToArray());
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
finally
{
content = JsonConvert.SerializeObject(results);
await FileIO.WriteTextAsync(file, content);
}
}
}
