/// <summary>
/// Restore a page
/// </summary>
/// <param name="pageId">The page identifier</param>
/// <returns>The restored page</returns>
private static async Task <SkrapedPage> RestorePage(int pageId)
{
var restoredPage = new SkrapedPage {
Id = pageId
};
var loaded = LocalSettings.Values.ContainsKey("Page" + pageId) &&
(bool)LocalSettings.Values["Page" + pageId];
var container = Roaming.CreateContainer(
PageKey,
ApplicationDataCreateDisposition.Always);
var compositeValue = container.Values[pageId.ToString()] as ApplicationDataCompositeValue;
if (compositeValue != null)
{
restoredPage.Url = new Uri(compositeValue[UrlProperty].ToString());
restoredPage.Title = compositeValue[TitleProperty].ToString();
restoredPage.ThumbnailPath = loaded
? new Uri(compositeValue[ThumbnailProperty].ToString())
: new Uri("ms-appx:///Assets/ie.png");
restoredPage.Loaded = loaded;
var imageCount = (int)compositeValue[ImageCountProperty];
for (var idx = 0; idx < imageCount; idx++)
{
restoredPage.Images.Add(new Uri(compositeValue[ImageIndex + idx].ToString()));
}
}
await RestorePageData(restoredPage);
return(restoredPage);
}
/// <summary>
/// The save page.
/// </summary>
/// <param name="page">
/// The page.
/// </param>
/// <returns>
/// The <see cref="Task"/> for asynchronous saving.
/// </returns>
public async Task SavePage(SkrapedPage page)
{
// save loaded status locally, so remote machines will load on first use
LocalSettings.Values["Page" + page.Id] = page.Loaded;
var compositeValue = new ApplicationDataCompositeValue
{
{ IdProperty, page.Id },
{ TitleProperty, page.Title },
{ ThumbnailProperty, page.ThumbnailPath.ToString() },
{ UrlProperty, page.Url.ToString() },
{ ImageCountProperty, page.Images.Count() }
};
for (var idx = 0; idx < page.Images.Count(); idx++)
{
compositeValue.Add(ImageIndex + idx, page.Images[idx].ToString());
}
var container = Roaming.CreateContainer(
PageKey,
ApplicationDataCreateDisposition.Always);
container.Values[page.Id.ToString()] = compositeValue;
await SavePageData(page);
}
/// <summary>
/// The get group for page.
/// </summary>
/// <param name="pageToCheck">
/// The page to check.
/// </param>
/// <returns>
/// The <see cref="SkrapeGroup"/>.
/// </returns>
public SkrapeGroup GetGroupForPage(SkrapedPage pageToCheck)
{
return(groups.SelectMany(
@group => @group.Pages,
(@group, page) => new { @group, page })
.Where(pageAndGroup => pageAndGroup.page.Id == pageToCheck.Id)
.Select(pageAndGroup => pageAndGroup.group)
.FirstOrDefault());
}
/// <summary>
/// The delete page method.
/// </summary>
/// <param name="page">
/// The page.
/// </param>
public void DeletePage(SkrapedPage page)
{
var container = Roaming.CreateContainer(
PageKey,
ApplicationDataCreateDisposition.Always);
if (container.Values.ContainsKey(page.Id.ToString()))
{
container.Values.Remove(page.Id.ToString());
}
}
/// <summary>
/// The generate test data method.
/// </summary>
private void GenerateTestData()
{
var baseuri = new Uri("http://csharperimage.jeremylikness.com/", UriKind.Absolute);
var groupNames = new[] { "Alpha", "Beta", "Omega " };
foreach (var groupName in groupNames)
{
var pages = new[]
{
"/2013/02/review-of-lenovo-ideapad-yoga-13-for.html",
"/2010/04/model-view-viewmodel-mvvm-explained.html",
"/2010/10/so-whats-fuss-about-silverlight.html",
"/2013/01/traveling-with-microsoft-and-asus.html"
};
var images = new[]
{
new Uri(
"http://1.bp.blogspot.com/-R7LqKNm9BBk/Tl4oD5P9JdI/AAAAAAAAAZ8/pZ8J8gz_e5E/s1600/BlogHeader4.png"),
new Uri(
"http://lh6.ggpht.com/-YPUxFruIDFA/USFp0raqHAI/AAAAAAAAA6E/bHy3vg05Ed4/picture005_thumb2.jpg?imgmax=800"),
new Uri(
"http://lh6.ggpht.com/-WYkLA5K30mw/UObJc7Ls6bI/AAAAAAAAA3A/2gng-TfN6aE/WP_000232_thumb%25255B1%25255D.jpg?imgmax=800")
};
var group = new SkrapeGroup();
group.Id = groupIdProvider.GetId();
group.Title = groupName;
group.Description =
string.Format(
"The {0} group for holding a set of test pages for the sample data of the application.",
groupName);
for (var x = 0; x < 50; x++)
{
var pageName = pages[x % pages.Length];
var pageUri = new Uri(baseuri, pageName);
var page = new SkrapedPage
{
Id = pageIdProvider.GetId(),
Url = pageUri,
Title = pageName.Replace("/", " "),
ThumbnailPath = new Uri("ms-appx:///Assets/Logo.png")
};
foreach (var image in images)
{
page.Images.Add(image);
}
group.Pages.Add(page);
}
groups.Add(group);
}
}
/// <summary>
/// The delete page method
/// </summary>
/// <param name="page">
/// The page.
/// </param>
public void DeletePage(SkrapedPage page)
{
var parent = GetGroupForPage(page);
page.Deleted = true;
parent.Pages.Remove(page);
Manager.DeletePage(page);
if (parent.Pages.Any())
{
return;
}
groups.Remove(parent);
Manager.DeleteGroup(parent);
}
/// <summary>
/// The add url.
/// </summary>
/// <param name="url">
/// The url.
/// </param>
/// <returns>
/// The <see cref="Task"/> to run asynchronously.
/// </returns>
public async Task AddUrl(Uri url)
{
var existingPage = groups.SelectMany(g => g.Pages, (g, p) => new { g, p })
.Where(@t => [email protected] && @t.p.Url == url)
.Select(@t => @t.p).Any();
if (existingPage)
{
return;
}
var page = new SkrapedPage
{
Id = pageIdProvider.GetId(),
Url = url,
Title = "New Skrape - Tap to Load",
ThumbnailPath = new Uri("ms-appx:///Assets/ie.png")
};
var domain = url.Host.ToLower();
var group = groups.FirstOrDefault(g => g.Title == domain);
if (group != null)
{
group.Pages.Add(page);
await Manager.SaveGroup(group);
}
else
{
var newGroup = new SkrapeGroup
{
Id = groupIdProvider.GetId(),
Title = domain,
Description =
string.Format("Collection of Skrapes for the {0} domain.", domain)
};
newGroup.Pages.Add(page);
Groups.Add(newGroup);
await Manager.SaveGroup(newGroup);
}
await Manager.SavePage(page);
Manager.AddUri(page.Url);
}
/// <summary>
/// The restore page data.
/// </summary>
/// <param name="page">
/// The page.
/// </param>
/// <returns>
/// The <see cref="Task"/>.
/// </returns>
private static async Task RestorePageData(SkrapedPage page)
{
var folder = await Local.CreateFolderAsync(PageFolder, CreationCollisionOption.OpenIfExists);
try
{
using (var fileStream = await folder.OpenStreamForReadAsync(string.Format(ZipTemplate, page.Id)))
{
using (var zipArchive = new ZipArchive(fileStream, ZipArchiveMode.Read))
{
var htmlEntry = zipArchive.GetEntry(HtmlEntry);
using (var htmlStream = new StreamReader(htmlEntry.Open()))
{
page.Html = await htmlStream.ReadToEndAsync();
}
var textEntry = zipArchive.GetEntry(TextEntry);
using (var textStream = new StreamReader(textEntry.Open()))
{
page.Text = await textStream.ReadToEndAsync();
}
}
// using (var decompressor = new Decompressor(fileStream.AsInputStream()))
// {
// var decompressionStream = decompressor.AsStreamForRead();
// // read the first 4 bytes to get the size of the entire buffer
// var sizeBytes = new byte[sizeof(int)];
// await decompressionStream.ReadAsync(sizeBytes, 0, sizeof(int));
// var totalSize = BitConverter.ToInt32(sizeBytes, 0);
// var byteBuffer = new byte[totalSize];
// await decompressionStream.ReadAsync(byteBuffer, 0, totalSize);
// page.Html = Encoding.UTF8.GetString(byteBuffer, 0, byteBuffer.Length);
// }
}
}
catch (FileNotFoundException)
{
// empty catch block is because file will simply throw exception if not found
}
}
/// <summary>
/// The get html for web page.
/// </summary>
/// <param name="page">
/// The page.
/// </param>
/// <returns>
/// The <see cref="Task"/> to run asynchronously.
/// </returns>
public async Task GetHtmlForWebPage(SkrapedPage page)
{
var client = new HttpClient();
try
{
var html = await client.GetStringAsync(page.Url);
page.Html = html;
var titleMatches = TitlePattern.Matches(html);
foreach (
var match in titleMatches.Cast <Match>()
.Where(match => match.Groups.Count > 0))
{
page.Title = match.Groups[1].Value;
break;
}
page.Text = await ParseHtmlToText(page.Html);
var images = (await ExtractImagesFromPage(page.Html)).ToArray();
if (images.Length <= 0)
{
return;
}
page.Images.Clear();
foreach (var image in images)
{
page.Images.Add(image);
}
}
catch (Exception ex)
{
page.Html = page.Text = ex.Message;
}
}
/// <summary>
/// The save page data.
/// </summary>
/// <param name="page">
/// The page.
/// </param>
/// <returns>
/// The <see cref="Task"/> for asynchronous save operations.
/// </returns>
private static async Task SavePageData(SkrapedPage page)
{
if (string.IsNullOrWhiteSpace(page.Html))
{
return;
}
var folder = await Local.CreateFolderAsync(
PageFolder,
CreationCollisionOption.OpenIfExists);
var file = await folder.CreateFileAsync(string.Format(ZipTemplate, page.Id), CreationCollisionOption.ReplaceExisting);
using (var zip = new ZipArchive(await file.OpenStreamForWriteAsync(), ZipArchiveMode.Create))
{
ZipArchiveEntry htmlEntry = zip.CreateEntry(HtmlEntry);
using (var htmlStream = new StreamWriter(htmlEntry.Open()))
{
await htmlStream.WriteAsync(page.Html);
}
ZipArchiveEntry textEntry = zip.CreateEntry(TextEntry);
using (var textStream = new StreamWriter(textEntry.Open()))
{
await textStream.WriteAsync(page.Text);
}
}
// using (var compressor = new Compressor(await file.OpenAsync(FileAccessMode.ReadWrite)))
// {
// var htmlBytes = Encoding.UTF8.GetBytes(page.Html);
// await compressor.WriteAsync(BitConverter.GetBytes(htmlBytes.Length).AsBuffer());
// await compressor.WriteAsync(htmlBytes.AsBuffer());
// await compressor.FinishAsync();
// }
}
