private ItemVersion OverrideVersion(ItemVersion overridden, ItemVersion over)
{
bool changed = false;
var v = overridden.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
// detected if we have recursed into this (on the current thread/request) and don't apply override if so
bool blocked = RequestThreadCache.Current.ContainsKey(overrideBlockKey + UniqueId)
? ((bool?)RequestThreadCache.Current[overrideBlockKey + UniqueId] ?? false)
: false;
if (over.Count > 0 && !blocked)
{
IUser u = null;
RequestThreadCache.Current[overrideBlockKey + UniqueId] = true;
try
{
u = SecurityManager.Current?.User;
}
finally
{
RequestThreadCache.Current[overrideBlockKey + UniqueId] = false;
}
foreach (var versioner in Versioners)
{
if (over.ContainsKey(versioner.VersionKey))
{
var legalVals = u == null
? new List <object> {
versioner.PublicVersionValue
}
: versioner.GetAllowedVersions(u);
var overVal = over[versioner.VersionKey];
if (legalVals.Any(lVal => lVal == null || lVal.Equals(overVal)))
{
if (!v.ContainsKey(versioner.VersionKey) ||
(v[versioner.VersionKey] == null && overVal != null) ||
!v[versioner.VersionKey].Equals(overVal))
{
v[versioner.VersionKey] = overVal;
changed = true;
}
}
}
}
}
return(changed ? new ItemVersion(v) : null);
}