public static Dictionary <String, double> getAnswer(List <int> tags)
{
Dictionary <String, double> giftsMap = new Dictionary <String, double>(); // mapping gifts to percentages
using (var context = new GifterDBEntities())
{
List <Users> users = context.Users.ToList();
foreach (Users user in users)
{
int c11 = 0;
foreach (Tags tag in user.Tags)
{
if (tags.Contains(tag.TagId))
{
c11++;
}
}
if (c11 == 0)
{
continue;
}
int c10 = tags.Count - c11;
int c01 = user.Tags.Count - c11;
double sim = 1.0 * c11 / (c11 + 2.0 * (c10 + c01));
foreach (Gifts gift in user.Gifts)
{
double value;
if (giftsMap.TryGetValue(gift.GiftName, out value))
{
giftsMap[gift.GiftName] = value + sim;
}
else
{
giftsMap.Add(gift.GiftName, sim);
}
}
}
}
if (giftsMap.Count == 0)
{
giftsMap.Add("Million dollars :D", 1);
}
giftsMap = giftsMap.OrderBy(x => - x.Value).ToDictionary(x => x.Key, x => x.Value);
double maxVal = giftsMap.Select(x => x.Value).Max();
var result = new Dictionary <String, double>();
foreach (var x in giftsMap)
{
result.Add(x.Key, x.Value / maxVal);
}
return(result);
}
public static String getGifts()
{
String res = "";
using (var context = new GifterDBEntities())
{
foreach (Gifts gift in context.Gifts)
{
if (res.Length > 0)
{
res += ",";
}
res += gift.GiftName;
}
}
return(res);
}
public static String getTags()
{
String res = "";
using (var context = new GifterDBEntities())
{
foreach (Tags tag in context.Tags)
{
if (res.Length > 0)
{
res += ",";
}
res += tag.TagName;
}
}
return(res);
}
public static void createUser(String userName, List <int> tags, List <int> gifts)
{
using (var context = new GifterDBEntities())
{
Users user = new Users();
user.UserName = userName;
foreach (int i in tags)
{
user.Tags.Add(context.Tags.First(x => x.TagId == i));
}
foreach (int i in gifts)
{
user.Gifts.Add(context.Gifts.First(x => x.GiftId == i));
}
context.Users.Add(user);
context.SaveChanges();
}
}
public static List <int> getPresentsFromString(String s)
{
String[] presents = s.Split(',');
List <int> presentIds = new List <int>();
foreach (String s_present in presents)
{
String tmp = s_present.Trim();
using (var context = new GifterDBEntities())
{
Gifts gift = context.Gifts.FirstOrDefault(x => x.GiftName.Equals(tmp));
if (gift == null)
{
gift = new Gifts();
gift.GiftName = tmp;
context.Gifts.Add(gift);
context.SaveChanges();
}
presentIds.Add(gift.GiftId);
}
}
return(presentIds);
}
public static List <int> getTagsFromString(String s)
{
String[] tags = s.Split(',');
List <int> tagIds = new List <int>();
foreach (String s_tag in tags)
{
String tmp = s_tag.Trim();
using (var context = new GifterDBEntities())
{
Tags tag = context.Tags.FirstOrDefault(x => x.TagName.Equals(tmp));
if (tag == null)
{
tag = new Tags();
tag.TagName = tmp;
context.Tags.Add(tag);
context.SaveChanges();
}
tagIds.Add(tag.TagId);
}
}
return(tagIds);
}
