public async Task AddAsync(StreamItem item)
{
if (_items.Value.Any(t => t.Id == item.Id))
return;
var folderName = Guid.NewGuid().ToString("N");
var parser = new HtmlParser();
var plainText = parser.GetPlainText(item.Content, 200);
var cacheFolder = await _rootCacheFolder.CreateFolderAsync(CacheFolderName, CreationCollisionOption.OpenIfExists).AsTask().ConfigureAwait(false);
var folder = await cacheFolder.CreateFolderAsync(folderName).AsTask().ConfigureAwait(false);
var newHtml = await SaveImagesAsync(folder, item.Content).ConfigureAwait(false);
var savedItem = new SavedStreamItem
{
Id = item.Id,
Title = item.Title,
Published = item.Published,
WebUri = item.WebUri,
ShortContent = plainText,
Content = newHtml,
ImageFolder = folderName
};
_items.Value.Add(savedItem);
_storageManager.Save(savedItem);
}
private async Task<string> SaveImagesAsync(StorageFolder folder, string html)
{
var parser = new HtmlParser();
var lexemes = parser.Parse(html);
var fixedImages = new List<string>();
var localHtml = new StringBuilder(html);
foreach (var lexeme in lexemes.OfType<HtmlTagLexeme>())
{
if (!String.Equals(lexeme.Name, "img", StringComparison.OrdinalIgnoreCase))
continue;
var src = lexeme.Attributes["src"];
if (fixedImages.Any(s => String.Equals(s, src, StringComparison.OrdinalIgnoreCase)))
continue;
var fileName = await DownloadImageAsync(src, folder).ConfigureAwait(false);
if (fileName == null)
continue;
fixedImages.Add(src);
var newSrc = String.Format("ms-appdata:///local/{0}/{1}/{2}", CacheFolderName, folder.Name, fileName);
localHtml.Replace(src, newSrc);
}
return localHtml.ToString();
}
public object Convert(object value, Type targetType, object parameter, string language)
{
try
{
var str = (string) value;
var parser = new HtmlParser();
return parser.GetPlainText(str, 200);
}
catch (Exception e)
{
_telemetryClient.TrackException(e);
return String.Empty;
}
}
public List <Paragraph> GetParagraphs(string html, out IList <Image> images)
{
if (html == null)
{
images = new Image[0];
return(new List <Paragraph>());
}
var allParagraphs = new List <Paragraph>();
try
{
var parser = new HtmlParser();
var lexemes = parser.Parse(html);
var paragraph = new Paragraph {
TextAlignment = _appSettings.TextAlignment
};
allParagraphs.Add(paragraph);
for (int lexemeIndex = 0; lexemeIndex < lexemes.Length; lexemeIndex++)
{
var lexeme = lexemes[lexemeIndex];
var literalLexeme = lexeme as LiteralLexeme;
if (literalLexeme != null)
{
paragraph.Inlines.Add(new Run {
Text = literalLexeme.Text, FontSize = _appSettings.FontSize
});
continue;
}
var tagLexeme = (HtmlTagLexeme)lexeme;
if (String.Equals(tagLexeme.Name, "br", StringComparison.OrdinalIgnoreCase))
{
paragraph.Inlines.Add(new LineBreak());
continue;
}
TryAddYoutubeVideo(tagLexeme, paragraph.Inlines);
if (String.Equals(tagLexeme.Name, "img", StringComparison.OrdinalIgnoreCase))
{
AddImage(paragraph.Inlines, tagLexeme, null);
continue;
}
if (tagLexeme.IsOpen && !tagLexeme.IsClose)
{
//paragraph = new Paragraph { TextAlignment = _appSettings.TextAlignment };
//allParagraphs.Add(paragraph);
var closeIndex = GetCloseIndex(lexemeIndex, lexemes);
if (closeIndex != -1)
{
var strParams = new StringParameters();
AddBeginEnd(paragraph.Inlines, lexemes, lexemeIndex, closeIndex, strParams);
lexemeIndex = closeIndex;
}
}
}
images = _allImages;
return(allParagraphs);
}
catch (Exception e)
{
_telemetry.TrackException(e);
images = _allImages;
return(new List <Paragraph>());
}
}
