public async Task <AuthorizationResult> AuthorizeEntityChangeAsync(IIdentity user, DbEntityEntry ent)
{
if (ent.State == EntityState.Unchanged || ent.State == EntityState.Detached)
{
return(AuthorizationResult.Success());
}
if (ent.Entity is T)
{
var casted = ent.Cast <T>();
switch (ent.State)
{
case EntityState.Added:
var interpreted = Interpret.BeforeCreate(casted.Entity, GetContextInfo(user));
return((await Authorize.CreateAsync(interpreted, GetContextInfo(user))).CreateAggregateResult());
case EntityState.Modified:
var original = CreateWithValues(casted.OriginalValues);
var modified = CreateWithValues(casted.CurrentValues);
var modifiedInterpreted =
Interpret.BeforeModify((T)original, (T)modified, GetContextInfo(user));
foreach (var field in ent.CurrentValues.PropertyNames)
{
ent.CurrentValues[field] = modifiedInterpreted.GetType().GetProperty(field)
.GetValue(modifiedInterpreted, null);
}
return((await Authorize.ModifyAsync((T)original, modifiedInterpreted, GetContextInfo(user)))
.CreateAggregateResult());
case EntityState.Deleted:
return((await Authorize.RemoveAsync(
(T)CreateWithValues(casted.OriginalValues, casted.Entity.GetType()),
GetContextInfo(user)))
.CreateAggregateResult());
default:
return(AuthorizationResult.Fail("The entity state is invalid", casted.Entity));
}
}
else
{
return(await GetChildRepositoryFor(ent).AuthorizeEntityChangeAsync(user, ent));
}
}