/// <summary>
/// This function checks for hak conflicts, checking to see if any files
/// in the hifs will overwrite files in the module or vica versa. If
/// overwrites will happen, it prompts the user to see if we should continue,
/// throwing an InstallCancelledException() if the user chooses to cancel.
/// </summary>
/// <param name="hakInfos">The hak infos being added to the module</param>
/// <param name="decompressedErfs">The decompressed erfs</param>
/// <param name="module">The module</param>
/// <param name="moduleInfo">The module info</param>
/// <param name="progress">The object implemening the progress interface</param>
private void CheckForHakConflicts(HakInfo[] hakInfos,
StringCollection decompressedErfs, Erf module, ModuleInfo moduleInfo,
IHakInstallProgress progress)
{
// Create a hashtable for fast lookup and add all of the files in all
// of the decompressed erf's to it.
Hashtable hifErfHash = new Hashtable(10000);
foreach(string directory in decompressedErfs)
{
// Strip the ".temp" off the end of the name.
string erf = Path.GetFileNameWithoutExtension(directory);
string[] files = Directory.GetFiles(directory);
foreach (string file in files)
{
// Only add the ERF file if it's not already there. We assume that
// the ERF's in the HIF play well together so we ignore duplicates.
string key = Path.GetFileName(file).ToLower();
if ("exportinfo.gff" != key && !hifErfHash.Contains(key)) hifErfHash.Add(key, erf.ToLower());
}
}
// Build a list of all of the added haks.
StringCollection hakInfoHaks = new StringCollection();
foreach (HakInfo hakInfo in hakInfos)
{
StringCollection temp = hakInfo.ModuleProperties["hak"] as StringCollection;
if (null != temp)
{
foreach (string tempString in temp)
hakInfoHaks.Add(tempString.ToLower());
}
}
// Add all of the files in all of the haks to the hash table.
Hashtable hifHakHash = new Hashtable(10000);
foreach (string hakName in hakInfoHaks)
{
Erf hak = Erf.Load(NWNInfo.GetFullFilePath(hakName));
StringCollection files = hak.Files;
foreach (string file in files)
try
{
string key = file.ToLower();
string hakNameLower = hakName.ToLower();
hifHakHash.Add(key, hakNameLower);
}
catch (ArgumentException)
{}
}
// At this point we have built a lookup hash table that contains every
// file going into the module (either directly in an erf or indirectly
// in a hak). Now we need to loop through all of the files in the
// module (and all of it's haks) and check to see if any of them are
// going to get overwritten. At this point we have several cases.
// 1. Module content is going to get replaced by erf content. We
// do not handle that case now, we wait until the end and allow
// the user to selectivly overwrite whatever they wish.
// 2. Module content is going to get replaced by hak content. We must
// warn the user that module files will not be used and the module
// may not work.
// 3. Module hak content is going to get replaced by hak content. Same
// as above.
// 4. Module hak content is going to overwrite erf content from the hif.
// In this case the hif's content is the content that is going to be
// ignored, again the user has to be warned.
OverwriteWarningCollection hakWarnings = new OverwriteWarningCollection();
OverwriteWarningCollection erfWarnings = new OverwriteWarningCollection();
string moduleFileName = Path.GetFileName(module.FileName);
// Loop through all of the files in the module checking to see if files in
// added haks will overwrite them.
StringCollection moduleFiles = module.Files;
foreach (string file in moduleFiles)
{
string source = hifHakHash[file.ToLower()] as string;
if (null != source)
hakWarnings.Add(new OverwriteWarning(file.ToLower(), moduleFileName, source));
}
// Loop through all of the files in the module's haks checking to see if
// files in the added haks will overwrite them or if they will overwrite
// files in added erf's.
StringCollection moduleHaks = moduleInfo.Haks;
foreach (string moduleHak in moduleHaks)
{
// Check to see if the hak in the module is one of the haks being added (this is
// a no-op condition which will result in 100% duplicates, no need to check it).
string hak = moduleHak + ".hak";
if (hakInfoHaks.Contains(hak.ToLower())) continue;
Erf erf = Erf.Load(NWNInfo.GetFullFilePath(hak));
StringCollection hakFiles = erf.Files;
foreach (string file in hakFiles)
{
// If the file is in the hak hash then it is going to be
// overwritten by the hif's haks.
string key = file.ToLower();
string source = hifHakHash[key] as string;
if (null != source)
hakWarnings.Add(new OverwriteWarning(key,
Path.GetFileName(erf.FileName.ToLower()), source));
// If the file is in the erf hash then it will overwrite the
// hif's erf.
source = hifErfHash[key] as string;
if (null != source)
erfWarnings.Add(new OverwriteWarning(key, source,
Path.GetFileName(erf.FileName.ToLower())));
}
}
// We have built the list of conflicts, before asking the user try to resolve the
// conflicts as we may be able to generate a merge hak to resolve some of them.
if (hakWarnings.Count > 0)
{
ConflictResolver resolver = new ConflictResolver(progress);
mergeHak = resolver.ResolveConflicts(hakInfos, module, moduleInfo, hakWarnings);
}
// We have finished checking for files that are going to get overwritten.
// If we have any warnings to issue to the user then do so now.
if (hakWarnings.Count > 0 &&
!progress.ShouldOverwrite(hakWarnings, false, OverwriteWarningType.HifsOverwritesModule))
throw new InstallCancelledException();
if (erfWarnings.Count > 0 &&
!progress.ShouldOverwrite(erfWarnings, false, OverwriteWarningType.ModuleOverwritesHifs))
throw new InstallCancelledException();
}
