private static Reference resolve(Resource context, string value, bool createIfNonExistant)
{
if (IsIdentifier(value))
{
// Get the folder we are located in (to get some context)
Pather p = new Pather(context.Location);
p.Pop();
if (Exists(value, p.ToString()) || IsFileReference(value))
{
// The resource definitely exists.
Resource res;
TryGet(value, p.ToString(), out res);
Reference reference = context.References.FirstOrDefault(r => r.Target == res);
// Create the reference if it didn't already exist
if (reference == null && createIfNonExistant)
{
// Attempt to create an alias reference
reference = ParseAlias(value);
if (reference != null)
context.AddReference(reference);
else
reference = new Reference(context, context, res);
}
return reference;
}
else
{
// It IS an alias of a mod we *know*?
int idx = value.IndexOf(':');
if (idx > 0 && idx < value.Length)
{
string modName = value.Substring(0, idx);
Mod mod;
if (mods.TryGetValue(modName, out mod))
{
// The mod exists.
Alias alias = mod.Aliases.FirstOrDefault(a => a.FullName.Equals(value));
if (alias == null && createIfNonExistant && value.Length > idx + 1)
{
// Last chance: We're a virtual resource.
if (VirtualResources.Contains(value))
alias = new Alias(mod, value.Substring(idx + 1), mod.VirtualResource);
else // Nope, missing.
alias = new Alias(mod, value.Substring(idx + 1), mod.InvalidResource);
}
return alias;
}
}
// Is it a file identifier?
else if (IsFileReference(value))
{
// Well, I guess it's a broken one.
Resource res;
TryGet(value, p.ToString(), out res);
Reference reference = context.References.FirstOrDefault(r => r.Target == res);
// Create the reference if it didn't already exist
if (reference == null && createIfNonExistant)
reference = new Reference(context, context, res);
return reference;
}
}
}
return null;
}
/// <summary>
/// Checks if a certain resource does exist under a certain file system.
/// </summary>
/// <param name="system"></param>
/// <param name="pather"></param>
/// <param name="magicChecked"></param>
/// <returns></returns>
private static bool Exists(IFileSystem system, Pather pather, bool magicChecked)
{
// If said file exists, good
if (system.Exists(pather.RootlessPath))
return true;
// If we already tried our magic
if (magicChecked)
{
// Pop the magic again.
pather.Pop();
// Second-to-last resort: Extension is .lua, so there might be a luac somewhere.
if (pather.Last.EndsWith(".lua") && system.Exists(pather.RootlessPath + "c"))
return true;
// Last resort: .lua or .luac extension
if (system.Exists(pather.RootlessPath + ".lua") || system.Exists(pather.RootlessPath + ".luac"))
{
string script = pather.Last;
pather.Pop();
script += system.Exists(script + ".lua") ? ".lua" : ".luac";
pather.Add(script);
return true;
}
return false;
}
else
{
// Try it for an alias
if (ParseAlias(pather.ToString()) != null)
return true;
}
// Since we can't check for zip files, try this.
// It's not exactly a beautiful approach but it's an allnighter here, so \o/
pather.Add(pather.Last + ".json");
// Just call us again, this time without magic. If we ever redo this part, this would be nice.
return Exists(system, pather, true);
}
