public ICollection<Performance> FilterPerformances(Artist artist, Venue venue, Category category, int from, int to)
{
ICollection<Performance> performances = performanceDao.GetAll();
ICollection<Artist> artists = artistDao.GetAll();
HashSet<Performance> pList1 = null;
HashSet<Performance> pList2 = null;
HashSet<Performance> pList3 = null;
HashSet<Performance> pList4 = null;
// get performances containing artist
if (artist != null)
{
foreach (Performance p in performances)
{
if (p.Artist == artist.Name)
pList1.Add(p);
}
}
// get performances at venue
if (venue != null)
{
foreach (Performance p in performances)
{
if (p.Venue == venue.ShortName)
pList2.Add(p);
}
}
// get performances containing artists of category
if (category != null)
{
foreach (Artist a in artists)
{
if (a.CategoryName == category.CategoryName)
{
foreach (Performance p in performances)
{
if (p.Artist == a.Name)
pList3.Add(p);
}
}
}
}
// get performances from starting with 1400, to approx. 2400
if ((from >= 14 && from <= 23) && (to <= 24 && to >= 15))
{
foreach (Performance p in performances)
{
if (p.Time >= from && p.Time <= to)
pList4.Add(p);
}
}
else if (from >= 14 && from <= 23) // only from
{
{
foreach (Performance p in performances)
{
if (p.Time >= from)
pList4.Add(p);
}
}
}
else if (to <= 24 && to >= 15) // only to
{
foreach (Performance p in performances)
{
if (p.Time <= to)
pList4.Add(p);
}
}
// create result out of partial results
HashSet<Performance> result = new HashSet<Performance>();
if (pList1 != null)
foreach (Performance p in pList1)
result.Add(p);
if (pList2 != null)
foreach (Performance p in pList2)
result.Add(p);
if (pList3 != null)
foreach (Performance p in pList3)
result.Add(p);
if (pList4 != null)
foreach (Performance p in pList4)
result.Add(p);
return new List<Performance>(result);
}
public CategoryVM(Category category)
{
this.category = category;
}