public static bool SetOrUpdateRatings(ref SimpleRating currentRating, SimpleRating newRating)
{
if (newRating.IsEmpty)
{
return(false);
}
else if (newRating.RatingValue < 0)
{
return(false);
}
else if (currentRating.IsEmpty)
{
currentRating = newRating;
return(true);
}
else if (!currentRating.VoteCount.HasValue && newRating.VoteCount.HasValue)
{
currentRating = newRating;
return(true);
}
else if (currentRating.VoteCount.HasValue && newRating.VoteCount.HasValue &&
currentRating.VoteCount.Value < newRating.VoteCount.Value)
{
currentRating = newRating;
return(true);
}
return(false);
}
public IEnumerable <IRating> RecommendSubjects(IRater rater, IEnumerable <ISubject> subjects, int take = -1, int skip = 0)
{
var cachedResults = new ConcurrentBag <IRating>();
var notCachedSubjects = new ConcurrentBag <ISubject>();
var options = new ParallelOptions()
{
MaxDegreeOfParallelism = Environment.ProcessorCount
};
Parallel.ForEach(subjects, options, subject =>
{
var key = CreateCacheKey(rater, subject);
var value = 0D;
if (_cache.TryGetValue(key, out value))
{
var ranking = new SimpleRating(rater, subject, value);
cachedResults.Add(ranking);
}
else
{
notCachedSubjects.Add(subject);
}
});
var partial = _algorithm.RecommendSubjects(rater, notCachedSubjects);
var results = partial.ToList();
results.AddRange(cachedResults);
var sorted = results.OrderByDescending(p => p.Value).AsEnumerable();
if (skip > 0)
{
sorted = sorted.Skip(skip);
}
if (take > 0)
{
sorted = sorted.Take(take);
}
return(sorted);
}
public static bool SetOrUpdateList <T>(List <T> currentList, List <T> newList, bool addMissing, out bool itemWasAdded, bool overwriteShorterStrings = true)
{
itemWasAdded = false;
bool changed = false;
if (newList == null)
{
return(false);
}
if (currentList == null)
{
currentList = new List <T>();
}
for (int iNew = 0; iNew < newList.Count; iNew++)
{
int iCurrent = currentList.IndexOf(newList[iNew]);
if (iCurrent >= 0)
{
object currentObj = (object)currentList[iCurrent];
object newObj = (object)newList[iNew];
if (currentObj == null)
{
continue;
}
if (currentObj is BaseInfo info)
{
((BaseInfo)currentObj).MergeWith((BaseInfo)newObj);
}
else if (currentObj is string && newObj is string)
{
string currentVal = (string)currentObj;
string newVal = (string)newObj;
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
}
else if (currentObj is SimpleTitle && newObj is string)
{
SimpleTitle currentVal = (SimpleTitle)currentObj;
string newVal = (string)newObj;
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
}
else if (currentObj is string && newObj is SimpleTitle)
{
string currentVal = (string)currentObj;
SimpleTitle newVal = (SimpleTitle)newObj;
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
}
else if (currentObj is SimpleTitle && newObj is SimpleTitle)
{
SimpleTitle currentVal = (SimpleTitle)currentObj;
SimpleTitle newVal = (SimpleTitle)newObj;
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
}
else if (currentObj is SimpleRating && newObj is SimpleRating)
{
SimpleRating currentVal = (SimpleRating)currentObj;
SimpleRating newVal = (SimpleRating)newObj;
changed |= SetOrUpdateRatings(ref currentVal, newVal);
}
else if (currentObj is SimpleRating && newObj is double)
{
SimpleRating currentVal = (SimpleRating)currentObj;
SimpleRating newVal = new SimpleRating((double)newObj);
changed |= SetOrUpdateRatings(ref currentVal, newVal);
}
else if (currentObj is byte[])
{
byte[] currentVal = (byte[])currentObj;
byte[] newVal = (byte[])newObj;
changed |= SetOrUpdateValue(ref currentVal, newVal);
}
else if (currentObj is IList)
{
IList currentVal = (IList)currentObj;
IList newVal = (IList)newObj;
Type listElementType = currentVal.GetType().GetGenericArguments().Single();
bool itemAdded = false;
if (listElementType == typeof(long))
{
changed |= SetOrUpdateList((List <long>)currentVal, (List <long>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(int))
{
changed |= SetOrUpdateList((List <int>)currentVal, (List <int>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(short))
{
changed |= SetOrUpdateList((List <short>)currentVal, (List <short>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(ulong))
{
changed |= SetOrUpdateList((List <ulong>)currentVal, (List <ulong>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(uint))
{
changed |= SetOrUpdateList((List <uint>)currentVal, (List <uint>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(ushort))
{
changed |= SetOrUpdateList((List <ushort>)currentVal, (List <ushort>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(double))
{
changed |= SetOrUpdateList((List <double>)currentVal, (List <double>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(float))
{
changed |= SetOrUpdateList((List <float>)currentVal, (List <float>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(string))
{
changed |= SetOrUpdateList((List <string>)currentVal, (List <string>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(PersonInfo))
{
changed |= SetOrUpdateList((List <PersonInfo>)currentVal, (List <PersonInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(CompanyInfo))
{
changed |= SetOrUpdateList((List <CompanyInfo>)currentVal, (List <CompanyInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(CharacterInfo))
{
changed |= SetOrUpdateList((List <CharacterInfo>)currentVal, (List <CharacterInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(SeasonInfo))
{
changed |= SetOrUpdateList((List <SeasonInfo>)currentVal, (List <SeasonInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(EpisodeInfo))
{
changed |= SetOrUpdateList((List <EpisodeInfo>)currentVal, (List <EpisodeInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(MovieInfo))
{
changed |= SetOrUpdateList((List <MovieInfo>)currentVal, (List <MovieInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(TrackInfo))
{
changed |= SetOrUpdateList((List <TrackInfo>)currentVal, (List <TrackInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else
{
throw new ArgumentException("SetOrUpdateList: IList is of an unsupported type");
}
if (itemAdded)
{
itemWasAdded = true;
}
}
else
{
object currentVal = currentObj;
object newVal = newObj;
if (Nullable.GetUnderlyingType(currentVal.GetType()) != null)
{
if (currentVal == null && newVal != null)
{
currentObj = newVal;
changed = true;
}
}
else
{
changed |= SetOrUpdateValue(ref currentVal, newVal);
}
}
}
else if (addMissing)
{
currentList.Add(newList[iNew]);
itemWasAdded = true;
changed = true;
}
}
currentList.Sort();
return(changed);
}
public static bool SetOrUpdateList <T>(List <T> currentList, List <T> newList, bool addMissing, out bool itemWasAdded, bool overwriteShorterStrings = true)
{
itemWasAdded = false;
bool changed = false;
if (newList == null)
{
return(false);
}
if (currentList == null)
{
currentList = new List <T>();
}
for (int iNew = 0; iNew < newList.Count; iNew++)
{
int iCurrent = currentList.IndexOf(newList[iNew]);
if (iCurrent >= 0)
{
object currentObj = (object)currentList[iCurrent];
object newObj = (object)newList[iNew];
if (currentObj == null)
{
continue;
}
Type objType = currentObj.GetType();
if (objType.IsClass)
{
FieldInfo[] fields = currentObj.GetType().GetFields(BindingFlags.Instance | BindingFlags.Public);
if (fields != null)
{
foreach (FieldInfo field in fields)
{
if (field.Name.EndsWith("Id", StringComparison.InvariantCultureIgnoreCase))
{
object currentVal = field.GetValue(currentObj);
object newVal = field.GetValue(newObj);
changed |= SetOrUpdateId(ref currentVal, newVal);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is string && field.GetValue(newObj) is string)
{
string currentVal = (string)field.GetValue(currentObj);
string newVal = (string)field.GetValue(newObj);
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is SimpleTitle && field.GetValue(newObj) is string)
{
SimpleTitle currentVal = (SimpleTitle)field.GetValue(currentObj);
string newVal = (string)field.GetValue(newObj);
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is string && field.GetValue(newObj) is SimpleTitle)
{
string currentVal = (string)field.GetValue(currentObj);
SimpleTitle newVal = (SimpleTitle)field.GetValue(newObj);
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is SimpleTitle && field.GetValue(newObj) is SimpleTitle)
{
SimpleTitle currentVal = (SimpleTitle)field.GetValue(currentObj);
SimpleTitle newVal = (SimpleTitle)field.GetValue(newObj);
changed |= SetOrUpdateString(ref currentVal, newVal, overwriteShorterStrings);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is SimpleRating && field.GetValue(newObj) is SimpleRating)
{
SimpleRating currentVal = (SimpleRating)field.GetValue(currentObj);
SimpleRating newVal = (SimpleRating)field.GetValue(newObj);
changed |= SetOrUpdateRatings(ref currentVal, newVal);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is SimpleRating && field.GetValue(newObj) is double)
{
SimpleRating currentVal = (SimpleRating)field.GetValue(currentObj);
SimpleRating newVal = new SimpleRating((double)field.GetValue(newObj));
changed |= SetOrUpdateRatings(ref currentVal, newVal);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is byte[])
{
byte[] currentVal = (byte[])field.GetValue(currentObj);
byte[] newVal = (byte[])field.GetValue(newObj);
changed |= SetOrUpdateValue(ref currentVal, newVal);
field.SetValue(currentObj, currentVal);
}
else if (field.GetValue(currentObj) is IList)
{
IList currentVal = (IList)field.GetValue(currentObj);
IList newVal = (IList)field.GetValue(newObj);
Type listElementType = currentVal.GetType().GetGenericArguments().Single();
bool itemAdded = false;
if (listElementType == typeof(long))
{
changed |= SetOrUpdateList((List <long>)currentVal, (List <long>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(int))
{
changed |= SetOrUpdateList((List <int>)currentVal, (List <int>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(short))
{
changed |= SetOrUpdateList((List <short>)currentVal, (List <short>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(ulong))
{
changed |= SetOrUpdateList((List <ulong>)currentVal, (List <ulong>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(uint))
{
changed |= SetOrUpdateList((List <uint>)currentVal, (List <uint>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(ushort))
{
changed |= SetOrUpdateList((List <ushort>)currentVal, (List <ushort>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(double))
{
changed |= SetOrUpdateList((List <double>)currentVal, (List <double>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(float))
{
changed |= SetOrUpdateList((List <float>)currentVal, (List <float>)newVal, true, out itemAdded);
}
else if (listElementType == typeof(string))
{
changed |= SetOrUpdateList((List <string>)currentVal, (List <string>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(PersonInfo))
{
changed |= SetOrUpdateList((List <PersonInfo>)currentVal, (List <PersonInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(CompanyInfo))
{
changed |= SetOrUpdateList((List <CompanyInfo>)currentVal, (List <CompanyInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(CharacterInfo))
{
changed |= SetOrUpdateList((List <CharacterInfo>)currentVal, (List <CharacterInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(SeasonInfo))
{
changed |= SetOrUpdateList((List <SeasonInfo>)currentVal, (List <SeasonInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(EpisodeInfo))
{
changed |= SetOrUpdateList((List <EpisodeInfo>)currentVal, (List <EpisodeInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(MovieInfo))
{
changed |= SetOrUpdateList((List <MovieInfo>)currentVal, (List <MovieInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else if (listElementType == typeof(TrackInfo))
{
changed |= SetOrUpdateList((List <TrackInfo>)currentVal, (List <TrackInfo>)newVal, true, out itemAdded, overwriteShorterStrings);
}
else
{
throw new ArgumentException("SetOrUpdateList: IList is of an unsupported type");
}
field.SetValue(currentObj, currentVal);
if (itemAdded)
{
itemWasAdded = true;
}
}
else
{
object currentVal = field.GetValue(currentObj);
object newVal = field.GetValue(newObj);
if (Nullable.GetUnderlyingType(field.FieldType) != null)
{
if (currentVal == null && newVal != null)
{
field.SetValue(currentObj, newVal);
changed = true;
}
}
else
{
changed |= SetOrUpdateValue(ref currentVal, newVal);
field.SetValue(currentObj, currentVal);
}
}
}
}
}
}
else if (addMissing)
{
currentList.Add(newList[iNew]);
itemWasAdded = true;
changed = true;
}
}
currentList.Sort();
return(changed);
}
