/// <summary>Constructor.</summary>
internal GameLibrary()
{
if (File.Exists(libraryFileName))
{
XmlDocument xml = new XmlDocument();
using (Stream stream = File.OpenRead(libraryFileName)) {
xml.Load(stream);
}
XmlElement rootNode = xml.DocumentElement;
foreach (XmlElement gameBoxNode in rootNode.SelectNodes("game-box"))
{
if (gameBoxNode.SelectSingleNode("name") != null)
{
// old format
XmlNode descriptionNode = gameBoxNode.SelectSingleNode("description");
XmlNode copyrightNode = gameBoxNode.SelectSingleNode("copyright");
XmlNode imageFileNode = gameBoxNode.SelectSingleNode("image-file");
GameBoxReference reference = new GameBoxReference(
gameBoxNode.SelectSingleNode("name").InnerText,
(descriptionNode != null ? descriptionNode.InnerText : null),
(copyrightNode != null ? copyrightNode.InnerText : null),
gameBoxNode.SelectSingleNode("file").InnerText,
Convert.FromBase64String(gameBoxNode.SelectSingleNode("hash").InnerText),
null);
string name = reference.Name.ToUpper();
List <GameBoxReference> referenceList;
if (!gameBoxes.TryGetValue(name, out referenceList))
{
referenceList = new List <GameBoxReference>(1);
gameBoxes.Add(name, referenceList);
}
referenceList.Add(reference);
}
else
{
// new format
GameBoxReference reference = new GameBoxReference(
gameBoxNode.GetAttribute("name"),
gameBoxNode.GetAttribute("description"),
gameBoxNode.GetAttribute("copyright"),
gameBoxNode.GetAttribute("file"),
Convert.FromBase64String(gameBoxNode.GetAttribute("hash")),
(gameBoxNode.HasAttribute("icon") ? Convert.FromBase64String(gameBoxNode.GetAttribute("icon")) : null));
string name = reference.Name.ToUpper();
List <GameBoxReference> referenceList;
if (!gameBoxes.TryGetValue(name, out referenceList))
{
referenceList = new List <GameBoxReference>(1);
gameBoxes.Add(name, referenceList);
}
referenceList.Add(reference);
}
}
}
}
/// <summary>Removes a game box from this library without updating the file.</summary>
/// <param name="gameBoxReference">A game box reference.</param>
private void removeReference(IGameBoxReference gameBoxReference)
{
List <GameBoxReference> referenceList;
if (gameBoxes.TryGetValue(gameBoxReference.Name.ToUpper(), out referenceList))
{
for (int i = 0; i < referenceList.Count; ++i)
{
if (GameBoxReference.HashAreIdentical(referenceList[i].Hash, gameBoxReference.Hash))
{
referenceList.RemoveAt(i);
break;
}
}
}
}
/// <summary>Adds a game box reference to this library.</summary>
/// <param name="gameBoxReference">A game box reference.</param>
public void AddReference(IGameBoxReference gameBoxReference)
{
Debug.Assert(gameBoxReference.Name != null);
if (gameBoxReference != defaultGameBox)
{
string name = gameBoxReference.Name.ToUpper();
List <GameBoxReference> referenceList;
if (!gameBoxes.TryGetValue(name, out referenceList))
{
referenceList = new List <GameBoxReference>(1);
gameBoxes.Add(name, referenceList);
}
else
{
foreach (GameBoxReference reference in referenceList)
{
if (GameBoxReference.HashAreIdentical(reference.Hash, gameBoxReference.Hash))
{
// update file path?
if (reference.FileName != gameBoxReference.FileName)
{
removeReference(reference);
break;
}
else
{
return;
}
}
}
}
// remove other references pointing to the same file path (at most one normally)
foreach (IGameBoxReference otherReference in GameBoxes)
{
if (otherReference.FileName == gameBoxReference.FileName)
{
removeReference(otherReference);
break;
}
}
referenceList.Add((GameBoxReference)gameBoxReference);
updateLibraryFile();
}
}
/// <summary>Looks for a game box file in the library.</summary>
/// <param name="hash">Hash value of the game box.</param>
/// <returns>A game box reference, or null if not found.</returns>
public IGameBoxReference FindGameBox(byte[] hash)
{
Debug.Assert(hash != null);
if (GameBoxReference.HashAreIdentical(hash, defaultGameBox.Hash))
{
return(defaultGameBox);
}
else
{
foreach (List <GameBoxReference> referenceList in gameBoxes.Values)
{
foreach (GameBoxReference reference in referenceList)
{
if (GameBoxReference.HashAreIdentical(hash, reference.Hash))
{
return(reference);
}
}
}
return(null);
}
}
