Ejemplo n.º 1
0
        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));
            }
        }