public static async Task<bool> Download(Revista rev, Func<IStorageFile, Task> onSucess, Action<string> callBack, Action<double> progressHandler)
{
if(!HaveInternetConnection())
{
callBack("Sem conexão à Internet");
return false;
}
BackgroundDownloader bg = new BackgroundDownloader();
var folder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(RevistaControllerWrapper.FolderName, CreationCollisionOption.OpenIfExists);
var file = await folder.CreateFileAsync(RevistaControllerWrapper.GetPdfName(rev), CreationCollisionOption.ReplaceExisting);
DownloadHelper down = new DownloadHelper(); ;
try
{
var d = bg.CreateDownload(RevistaController.Instance.GetDownloadFile(rev), file);
await down.HandleDownloadAsync(d, true, onSucess, callBack, progressHandler);
}
catch
{
return false;
}
return true ;
}
public async Task<StorageFile> GetPDF(Revista rev)
{
try
{
var folder = await ApplicationData.Current.LocalFolder.CreateFolderAsync(FolderName, CreationCollisionOption.OpenIfExists);
return await folder.GetFileAsync(GetPdfName(rev));
}
catch
{
return null;
}
}
public bool RefreshLista(string pagHtml)
{
const string IMAGEHD = @"http://www.portugal-a-programar.pt/revista-programar/images/ed{0}.{1}";
const string REGEX = @"(?:<a href="")(?<url>[^""]*)(?:""><img border=""0"" style=""padding: 10px; margin: 10px;"" alt="")(?<nome>[^""]*)(?:"" src="")(?<img>[^""]*)";
if (string.IsNullOrEmpty(pagHtml))
return false;
List<Revista> list = new List<Revista>();
foreach (Match item in Regex.Matches(pagHtml, REGEX, RegexOptions.Multiline))
{
var grp = item.Groups;
var rev = new Revista()
{
Url = grp["url"].Value
,
//ImgUrl = grp["img"].Value //mudar para uma imagem com melhor qualidade
//,
Name = grp["nome"].Value
,
ID = grp["url"].Value.Split('=').LastOrDefault()//um pouco errado, mas funciona :)
};
rev.ImgUrl = new Uri(string.Format(IMAGEHD, rev.ID, grp["img"].Value.Split('.').LastOrDefault())); //outra vez, nao muito correcto mas funciona
list.Add(rev);
}
if (list.Count > 0)
Lista = list;
return list.Count > 0;
}
public Uri GetDownloadFile(Revista rev)
{
const string FRM = @"http://www.portugal-a-programar.pt/revista-programar/edicoes/download.php?t=site&e={0}";
return new Uri(string.Format(FRM, rev.ID), UriKind.Absolute);
}
public static string GetPdfName(Revista rev)
{
return string.Format("{0}.pdf", rev.ID);
}