private static IRequiredDataResponse VerifyPreConditions <T>(Entity entity, CRUD.CrudTypes crudFlags)
{
Ensure.ArgumentNotNull(nameof(entity), entity);
var response = new RequiredDataResponse {
IsError = !VerifyEntity <T>(crudFlags)
};
if (!response.IsError)
{
return(VerifyEntityProperties(entity, crudFlags));
}
response.Message = GetMessageForEntity <T>(crudFlags);
return(response);
}
//TODO: Break this up into smaller methods
private static IRequiredDataResponse VerifyEntityPropertiesForCreate(Entity entity)
{
Ensure.ArgumentNotNull(nameof(entity), entity);
var response = new RequiredDataResponse();
var entityType = entity.GetType();
var propertyEntry = entityType.PropertyNamesWithAttribute <RequiredForCreateAttribute>(Properties.IsEnabled, true);
foreach (var entry in propertyEntry)
{
var propertyValue = entityType.GetProperty(entry.Key)?.GetValue(entity, null);
if (propertyValue == null)
{
response.IsError = true;
response.MissingPropertyNames.Add(entry.Key);
}
else
{
// check if property is an object that has required fields.
if (propertyValue is Entity)
{
// check the returned list
var items = entry.Value;
var subItemList = new Collection <string>();
var isSubError = false;
foreach (var item in items)
{
var subItemValue = entityType.GetProperty(item)?.GetValue(propertyValue, null);
var isNullOrDefault = false;
// first check nullable, for any type
var propertyType = entityType.GetProperty(item)?.PropertyType;
if (propertyType != null)
{
if (propertyType == typeof(string) ||
propertyType.IsGenericType &&
propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
isNullOrDefault = (subItemValue == null);
}
else
{
var objectType = Activator.CreateInstance(propertyType);
isNullOrDefault = objectType.Equals(subItemValue);
}
}
if (isNullOrDefault)
{
isSubError = true;
subItemList.Add(item);
}
}
if (isSubError)
{
response.IsError = true;
response.MissingSubPropertyNames.Add(entry.Key, subItemList);
}
}
}
}
return(response);
}