private static bool InternalSwitchVersion(
string currentVersion,
string newVersion,
Depot currentDLC,
Depot newDLC,
string bl3Path,
string ddPath,
string username,
Action <int> setBarMax,
Action <int> setBarValue,
Action incrementBar
)
{
/*
* How switching versions works
* ============================
* Switching versions will upgrade/downgrade through every version between the current and the target.
* This will be combined into one operation, no need to replace the same files multiple times.
*
* We use the fields from `VersionInfo` as follows.
* Note that upgrading refers to upgrading *to* the relevant version, while downgrading refers to downgrading *from* it.
*
* FilesToAdd:
* When upgrading, all these files get added.
* When downgrading, all these files get deleted.
* FilesToDelete:
* When upgrading, all these files get deleted.
* When downgrading, all these files get added again, from the version before this one.
* FilesToReplace:
* Behaves like `FilesToAdd` when upgrading.
* Behaves like `FilesToDelete` when downgrading.
*
* Because we want to cache downloads, we store the manifest of the version we discovered a file alongside it.
* Future calls will discover it at the same version, and can find it in the same place in our cache.
* We make sure to validate files every download though incase some corrupted.
*
* While iterating, if a file is added then deleted (or vice versa) only the latest state is saved.
* We also update manifests when this happens, as the file might have changed inbetween.
*
* DLCs and the base game work mostly the same, only difference is DLCs need to specify all their files as `FilesToAdd` on
* their lowest version, so that we have a full list to delete when uninstalling.
*/
currentDLC |= Depot.Base;
newDLC = (newDLC & GetSupportedDepots(newVersion)) | Depot.Base;
int currentIdx = AllVersionInfo.FindIndex(x => x.ProductVersion == currentVersion);
int newIdx = AllVersionInfo.FindIndex(x => x.ProductVersion == newVersion);
bool upgrading = currentIdx < newIdx;
// Also store the depot/manifest to get each file from
Dictionary <string, (Depot dep, VersionInfo info)> filesToAdd = new Dictionary <string, (Depot dep, VersionInfo info)>();
HashSet <string> filesToDelete = new HashSet <string>();
Action <Dictionary <Depot, HashSet <string> >, VersionInfo> addFiles = (dict, info) => {
foreach (KeyValuePair <Depot, HashSet <string> > entry in dict)
{
if (!newDLC.HasFlag(entry.Key))
{
continue; // We'll deal with uninstalled dlc files later
}
foreach (string file in entry.Value)
{
filesToAdd[file] = (entry.Key, info);
filesToDelete.Remove(file);
}
public static Depot GetSupportedDepots(string version)
{
return(AllVersionInfo.Find(x => x.ProductVersion == version).Manifests.Keys.Aggregate((a, b) => a | b));
}
public static string GetVersionName(string version) => AllVersionInfo.Find(x => x.ProductVersion == version)?.Name;
public static bool IsValidVersion(string version) => AllVersionInfo.Any(x => x.ProductVersion == version);
public static IEnumerable <string> GetAllVersions() => AllVersionInfo.Select(x => x.ProductVersion);
