public List <Entity> MapReduce(Entity entity, int threshold)
{
var result = new List <Entity>();
//Dictionary<Dictionary<int, int>, int> Map2 = new Dictionary<Dictionary<int, int>, int>();
var map2 = new List <Map2Reduce>();
foreach (var user in UserProfiles)
{
for (int i = 0; i < user.History.Count; i++)
{
for (int j = 0; j < user.History.Count; j++)
{
if (j != i)
{
if (!user.PairVideos.Exists(x => x.Key == user.History[i] &&
x.Value == user.History[j])
&&
!user.PairVideos.Exists(x => x.Key == user.History[j] &&
x.Value == user.History[i])
)
{
user.PairVideos.Add(new PairValue
{
Key = user.History[i],
Value = user.History[j]
});
}
}
}
}
//Map2.Add(user.PairVideos, 1);
map2.Add(new Map2Reduce
{
PairVideos = user.PairVideos,
//Score = 0
});
}
var all_pairs = new List <PairValue>();
foreach (var map in map2)
{
all_pairs.AddRange(map.PairVideos);
}
var distinct_pairs = new List <PairValue>();
foreach (var pair in all_pairs)
{
if (!distinct_pairs.Exists(x => x.Key == pair.Key && x.Value == pair.Value)
&&
!distinct_pairs.Exists(x => x.Value == pair.Key && x.Key == pair.Value))
{
pair.Score = all_pairs.Count(x => x.Key == pair.Key && x.Value == pair.Value ||
x.Key == pair.Value && x.Value == pair.Key);
distinct_pairs.Add(pair);
}
}
var pair_result = distinct_pairs.Where(x => x.Score >= threshold);
pair_result = pair_result.Where(x => x.Key == entity.RowNumber ||
x.Value == entity.RowNumber
).ToList();
foreach (var item in pair_result)
{
if (item.Key != entity.RowNumber)
{
result.Add(Films.FirstOrDefault(x => x.RowNumber == item.Key));
}
if (item.Value != entity.RowNumber)
{
result.Add(Films.FirstOrDefault(x => x.RowNumber == item.Value));
}
}
return(result);
}