public PageContainer GetPage(string category, int page, string search, string sort, FilterVM filter)
{
int entitiesPerPage = 10;
PageContainer container = new PageContainer();
IEnumerable <TEntity> ads = dbSet.Where(ad => ad.IsFreezed == false);
// search
ads = dbSet.Where(ad => ad.Title.Contains(search));
// filter
IFilterAdsStrategy <TEntity> filterAds = null;
if (filter != null)
{
if (category == "smartphone")
{
filterAds = new FilterSmartphones <TEntity>();
}
else if (category == "laptop")
{
filterAds = new FilterLaptops <TEntity>();
}
else if (category == "monitor")
{
filterAds = new FilterMonitors <TEntity>();
}
else if (category == "videocard")
{
filterAds = new FilterVideocards <TEntity>();
}
else if (category == "processor")
{
filterAds = new FilterProcessors <TEntity>();
}
else if (category == "RAM")
{
filterAds = new FilterRAMs <TEntity>();
}
else if (category == "drive")
{
filterAds = new FilterDrives <TEntity>();
}
}
if (filterAds != null)
{
ads = filterAds.Filter(ads, filter);
}
// sort
if (sort == "recent")
{
ads = ads.OrderByDescending(ad => ad.Id);
}
else if (sort == "decrease-price")
{
ads = ads.OrderByDescending(ad => ad.Price);
}
else if (sort == "increase-price")
{
ads = ads.OrderBy(ad => ad.Price);
}
else if (sort == "own")
{
ads = ads.Where(ad => ad.UserId == filter.UserId);
}
// pagination
container.Ads = ads.Skip((page - 1) * entitiesPerPage).Take(entitiesPerPage);
container.PageAmount = (int)Math.Ceiling(ads.Count() / (double)entitiesPerPage);
return(container);
}