public Engine(IList <Item> items)
{
_items = items;
Immutable.Add("Sulfuras, Hand of Ragnaros");
IncreasesInQuality.Add("Aged Brie");
AccelleratesInQuality.Add("Backstage passes");
DegradesFast.Add("Conjured");
_rules = new Dictionary <Func <Item, bool>, Action <Item> >
{
{
i => i.Name.StartsWithAny(IncreasesInQuality) || i.Name.StartsWithAny(AccelleratesInQuality),
i => i.Quality = i.Quality + 2
},
{ i => i.Name.StartsWithAny(IncreasesInQuality) && i.SellIn < 0, i => i.Quality++ },
{ i => i.Name.StartsWithAny(AccelleratesInQuality) && i.SellIn < 11, i => i.Quality++ },
{ i => i.Name.StartsWithAny(AccelleratesInQuality) && i.SellIn < 6, i => i.Quality++ },
{ i => i.Name.StartsWithAny(AccelleratesInQuality) && i.SellIn < 0, i => i.Quality = 0 },
{
i => !IncreasesInQuality.Contains(i.Name) && !AccelleratesInQuality.Contains(i.Name) && i.SellIn < 0,
i => i.Quality--
},
{ i => i.Name.StartsWithAny(DegradesFast), i => i.Quality-- }
};
}
