public async Task <IList <Product> > Build(NameValueCollection qs = null)
{
// include
_query = _context.Products
.Include(p => p.SubImages)
.Include(p => p.SubCategory)
.Include(p => p.Reviews).AsQueryable();
// order clause using strategy
// if qs[Sort] is not defined, assign 0 as default
int sortId = (qs[QueryConstants.Sort] == null) ? 0 : Convert.ToInt32(qs[QueryConstants.Sort]);
SortConstants sortConst = (SortConstants)sortId;
IOrderClauseStrategy orderStrategy = _orderStrategyFactory[sortConst];
_query = orderStrategy.GetOrderClause(_query);
// remove Sort name and value from qs
qs.Remove(QueryConstants.Sort);
// where clause using specification
// add Where clause only when qs include others rather than sort
if (qs.Count != 0)
{
_query = _query.Where(_specificationBuilder.Build(qs)).AsQueryable();
}
return(await _query.ToListAsync());
}
public string Build(int type)
{
IOrderClauseStrategy orderStrategy = _orderStrategyFactory[(SortConstants)type];
return(orderStrategy.GetType().ToString());
}
