/// <summary>
/// Get an attribute of an entity
/// </summary>
/// <typeparam name="TPropType">Property type</typeparam>
/// <param name="entity">Entity</param>
/// <param name="key">Key</param>
/// <param name="genericAttributeService">ArticleAttributeService</param>
/// <param name="siteId">Load a value specific for a certain store; pass 0 to load a value shared for all stores</param>
/// <returns>Attribute</returns>
public static TPropType GetArticleAttribute <TPropType>(this BaseEntity entity,
string key, IArticleAttributeService genericAttributeService, int siteId = 0)
{
if (entity == null)
{
throw new ArgumentNullException("entity");
}
if (genericAttributeService == null)
{
genericAttributeService = EngineContext.Current.Resolve <IArticleAttributeService>();
}
string keyGroup = entity.GetUnproxiedEntityType().Name;
return(genericAttributeService.GetArticleAttribute <TPropType>(keyGroup, entity.Id, key, siteId));
#region Old
//var props = genericAttributeService.GetAttributesForEntity(entity.Id, keyGroup);
////little hack here (only for unit testing). we should write expect-return rules in unit tests for such cases
//if (props == null)
// return default(TPropType);
//props = props.Where(x => x.SiteId == siteId).ToList();
//if (props.Count == 0)
// return default(TPropType);
//var prop = props.FirstOrDefault(ga =>
// ga.Key.Equals(key, StringComparison.InvariantCultureIgnoreCase)); //should be culture invariant
//if (prop == null || string.IsNullOrEmpty(prop.Value))
// return default(TPropType);
//return CommonHelper.To<TPropType>(prop.Value);
#endregion
}