/// <summary>
/// Downloads the image of an advert.
/// </summary>
/// <param name="advert">Advert to download the image.</param>
private static void DownloadAdvertImage(Advert advert)
{
// Compose advert image name
string advertImageName =
string.Format(Resources.AdvertImageFileName, advert.AdvertID.ToString());
bool imageWasDownloaded = false;
bool imageExistsInFileSystem = File.Exists(AdvertHelper.AdvertsLocalFolder + advertImageName);
if (imageExistsInFileSystem == false)
{
try
{
// Download image
(new WebClient()).DownloadFile(Resources.AdvertsBaseURL + advertImageName,
AdvertHelper.AdvertsLocalFolder + advertImageName);
imageWasDownloaded = true;
}
catch (Exception ex)
{
// Log error
LogManager.LogError(ex);
// Image could not be downloaded
advert.Image = null;
}
}
if (imageExistsInFileSystem || imageWasDownloaded)
{
// Get image from file system
using (FileStream imgStream = File.OpenRead(AdvertHelper.AdvertsLocalFolder + advertImageName))
{
advert.Image = new Bitmap(imgStream);
}
}
}
/// <summary>
/// Initializes advert logic.
/// </summary>
public static void Init()
{
if (AdvertHelper.IsInitialized == false)
{
AdvertHelper.IsInitialized = true;
AdvertHelper.AvailablesAdverts = new List<Advert>();
try
{
// Create advert local folder if not exists
if (Directory.Exists(AdvertHelper.AdvertsLocalFolder) == false)
{
Directory.CreateDirectory(AdvertHelper.AdvertsLocalFolder);
}
// Get advert-xml from repository
XDocument xdoc = XDocument.Load(Resources.AdvertsBaseURL + Resources.AdvertsConfigFileName);
// Update latest advert-xml downloaded with the new one
xdoc.Save(AdvertHelper.AdvertsConfigFilePath);
}
catch (Exception ex)
{
AdvertHelper.IsInitialized = false;
// Log error
LogManager.LogError(ex);
}
if (File.Exists(AdvertHelper.AdvertsConfigFilePath) == true)
{
try
{
// Load adverts config file
XDocument xdoc = XDocument.Load(AdvertHelper.AdvertsConfigFilePath);
// Get enabled adverts
IEnumerable<XElement> advertsFromConfig = xdoc.Descendants(AdvertsConfigNodes.Advert)
.Where(n => n.Attribute(AdvertsConfigNodes.AdvertAttrEnabled)
.Value.ToLower() == (true).ToString().ToLower());
// Loop through adverts from config
foreach (XElement advertNode in advertsFromConfig)
{
bool downloadAdvertImage = false;
var advert = new Advert();
advert.AdvertID = Convert.ToInt32(advertNode.Attribute(AdvertsConfigNodes.AdvertAttrId).Value);
advert.LinkURL = advertNode.Descendants(AdvertsConfigNodes.Link).First()
.Attribute(AdvertsConfigNodes.LinkAttrUrl).Value;
// Get compiled attribute value
string compiledValue = advertNode.Attribute(AdvertsConfigNodes.AdvertAttrCompiled).Value;
if (compiledValue.ToLower() == (true).ToString().ToLower())
{
// Advert is compiled, get image from CompiledAdverts
Advert advertCompiled = AdvertHelper.CompiledAdverts.FirstOrDefault(a => a.AdvertID == advert.AdvertID);
if (advertCompiled != null)
{
advert.Image = advertCompiled.Image;
}
else
{
// Advert is marked as compiled but was not found in resources
downloadAdvertImage = true;
}
}
else
{
downloadAdvertImage = true;
}
if (downloadAdvertImage == true)
{
AdvertHelper.DownloadAdvertImage(advert);
if (advert.Image == null)
{
// Image could not be downloaded, continue with next advert
continue;
}
}
// Add to available adverts
AdvertHelper.AvailablesAdverts.Add(advert);
} // END foreach
}
catch (Exception ex)
{
AdvertHelper.IsInitialized = false;
// Log error
LogManager.LogError(ex);
}
} // END if
if (AdvertHelper.AvailablesAdverts.Count == 0)
{
// Indicate all compiled adverts as available adverts
AdvertHelper.AvailablesAdverts = new List<Advert>();
foreach (Advert compiledAd in AdvertHelper.CompiledAdverts)
{
AdvertHelper.AvailablesAdverts.Add(compiledAd);
}
if (AdvertHelper.AvailablesAdverts.Count == 0)
{
// No available adverts, show default advert
AdvertHelper.AvailablesAdverts.Add(AdvertHelper.DefaultAdvert);
}
}
} // END if (AdvertHelper.IsInitialized == false)
}
