/// <summary>
/// Most important method in application
/// Is responsible for coordinating every class
/// 1. Prepares field for making web request.
/// 2. Constantly updates itself in infobox
/// 3. Creates new instance of WebSite and serves requests
/// 4. If there is internet connection takes source code and gives it to Parser to find all correct images links
/// 5. Makes grid to show images
/// 6. Allows images to be downloaded from WEB.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void WebRequest(object sender, RoutedEventArgs e)
{
//Prepare application windows for new request.
ClearGrid(Cells);
//Inform about start of process.
InfoBoxLabel.Background = System.Windows.Media.Brushes.White;
InfoBoxLabel.AppendText("Wysyłam żądanie...\n");
InfoBoxLabel.ScrollToEnd();
//Take address from address bar.
WebSite WebSite = new WebSite(SiteAdressTextBox.Text);
//Verify correctness of web address
Parser.ValidateWebAddress(WebSite.WebSiteAddress.ToString());
InfoBoxLabel.AppendText("Adres internetowy został zweryfikowany...\n");
InfoBoxLabel.ScrollToEnd();
//When there is internet connection.
if (Connections.HasInternetConnection())
{
InfoBoxLabel.AppendText("Wykryto połączenie internetowe...\n");
InfoBoxLabel.ScrollToEnd();
//Check if website is available (can I ping it?)
if (WebSite.IsWebSiteAvailable(WebSite.WebSiteAddress) == true)
{
//If there was response from website...
InfoBoxLabel.AppendText("Nawiązano połączenie ze stroną...\n");
InfoBoxLabel.ScrollToEnd();
//Get Source Code of website (HTML document only)...
WebSite.GetWebsiteSourceCode();
//...and inform user about success
InfoBoxLabel.AppendText("Kod strony pobrano pomyślnie...\n");
InfoBoxLabel.ScrollToEnd();
//Having document, Parse it and tame all image links from it.
WebSite.RetrieveImageLinks(WebSite.WebSiteAddress);
//Update information about needed cells to dynamically create in GRID
Cells = FindAllImages.ListOfDistinctMatches.Count;
if (Cells > 0)
{
//Prepare GRID layout to further display
MakeGrid(Cells);
//Take all links and fill grid with it's content
FillGrid(Cells);
//Enable second button
DownloadAllButon.IsEnabled = true;
}
}
//Can't ping website
else
{
//Inform user about failure
InfoBoxLabel.AppendText("Brak odpowiedzi od serwera\n");
InfoBoxLabel.ScrollToEnd();
//Change box color to draw attention of user
InfoBoxLabel.Background = System.Windows.Media.Brushes.Crimson;
}
}
else
{
//Very angry color to force user to buy the internet (or correct it's connection)
InfoBoxLabel.Background = System.Windows.Media.Brushes.Crimson;
//Short info about "obstacle"
InfoBoxLabel.AppendText("Brak połączenia internetowego...\n");
InfoBoxLabel.ScrollToEnd();
}
}
/// <summary>
/// Inform user about completed download
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void CompletedOneImage(object sender, AsyncCompletedEventArgs e)
{
InfoBoxLabel.AppendText("Plik został pobrany...\n");
InfoBoxLabel.ScrollToEnd();
//throw new NotImplementedException();
}