/// <summary>
/// Gets a collection of <see cref="EditionPivot"/> to compute the ranking at a specified date.
/// </summary>
/// <param name="rankingVersion"><see cref="RankingVersionPivot"/></param>
/// <param name="date">Ranking date; if not a monday, no results returned.</param>
/// <param name="involvedPlayers">Out; involved <see cref="PlayerPivot"/> for the collection of <see cref="EditionPivot"/> returned.</param>
/// <returns>Collection of <see cref="EditionPivot"/>.</returns>
internal static List <EditionPivot> EditionsForRankingAtDate(RankingVersionPivot rankingVersion, DateTime date, out List <PlayerPivot> involvedPlayers)
{
if (date.DayOfWeek != DayOfWeek.Monday)
{
involvedPlayers = new List <PlayerPivot>();
return(new List <EditionPivot>());
}
var editionsRollingYear = GetList <EditionPivot>().Where(edition =>
edition.DateEnd < date &&
edition.DateEnd >= date.AddDays(-1 * ConfigurationPivot.Default.RankingWeeksCount * 7) &&
GridPointPivot.GetRankableLevelList(rankingVersion).Contains(edition.Level)).ToList();
if (rankingVersion.ContainsRule(RankingRulePivot.ExcludingRedundantTournaments))
{
// No redundant tournament, when slot is unknown (take the latest).
// No redundant slot, regarding of the tournament (take the latest).
editionsRollingYear = editionsRollingYear.Where(edition =>
!editionsRollingYear.Any(otherEdition =>
otherEdition.Slot == edition.Slot &&
(otherEdition.Slot != null || (otherEdition.Tournament == edition.Tournament)) &&
otherEdition.DateEnd > edition.DateEnd
)
).ToList();
}
involvedPlayers = editionsRollingYear
.SelectMany(edition =>
edition.Matches.SelectMany(match => match.Players))
.Distinct()
.Where(player => !player.IsJohnDoe)
.ToList();
return(editionsRollingYear);
}
/// <summary>
/// Collection of <see cref="LevelPivot"/> which can be used to compute the specified <see cref="RankingVersionPivot"/>.
/// </summary>
internal static List <LevelPivot> GetRankableLevelList(RankingVersionPivot rankingVersion)
{
return(GetList <GridPointPivot>()
.Select(gridPoint => gridPoint.Level)
.Distinct()
.Where(level => rankingVersion.ContainsRule(RankingRulePivot.IncludingOlympicGames) || !level.IsOlympicGames)
.ToList());
}
/// <summary>
/// Gets the number of points gained by a specified player for this edition. The gain might vary regarding of the ruleset.
/// </summary>
/// <param name="player">A <see cref="PlayerPivot"/></param>
/// <param name="rankingVersion">A <see cref="RankingRulePivot"/> (ruleset of current ranking).</param>
/// <returns>Number of points for this player at this edition; 0 if any argument is <c>Null</c>.</returns>
internal uint GetPlayerPoints(PlayerPivot player, RankingVersionPivot rankingVersion)
{
uint points = 0;
if (player == null || rankingVersion == null)
{
return(points);
}
// If qualifcation rule applies and player comes from qualifications for this edition.
if (rankingVersion.ContainsRule(RankingRulePivot.IncludingQualificationBonus) && PlayerIsQualified(player))
{
points = QualificationPointPivot.GetByLevelAndDrawSize(Level.Id, DrawSize)?.Points ?? 0;
}
// Cumulable points (round robin).
points += (uint)Matches
.Where(match => match.Winner == player && match.Round.IsRoundRobin)
.Sum(match => match.PointGrid?.Points ?? 0);
var bestWin = Matches
.Where(match => match.Winner == player && !match.Round.IsRoundRobin && !match.Round.IsBronzeReward)
.OrderBy(match => match.Round.Importance)
.FirstOrDefault();
var bestLose = Matches
.Where(match => match.Loser == player && !match.Round.IsRoundRobin && !match.Round.IsBronzeReward)
.OrderBy(match => match.Round.Importance)
.FirstOrDefault();
if (Matches.Any(match => match.Round.IsBronzeReward && match.Players.Contains(player)))
{
if (Matches.Any(match => match.Winner == player && match.Round.IsBronzeReward))
{
// Third place points.
points += Matches
.First(match => match.Winner == player && match.Round.IsBronzeReward)
.PointGrid?.Points ?? 0;
}
else
{
// Fourth place points.
points += GridPointPivot.GetByLevelAndRound(Level.Id, RoundPivot.GetQuarterFinal().Id)?.Points ?? 0;
}
}
else
{
// Unable to detect a lose by walkover the next round than a win by walkover.
// In that case, points from the win by walkover are ignored.
if (bestLose == null)
{
points += bestWin?.PointGrid?.Points ?? 0;
}
else if (bestWin != null)
{
var lastWinRound = RoundPivot.GetByImportance(bestLose.Round.Importance + 1);
var grid = bestWin.PointGrid;
if (bestWin.Round.Importance > lastWinRound.Importance)
{
grid = GridPointPivot.GetByLevelAndRound(Level.Id, lastWinRound.Id);
}
points += grid?.Points ?? 0;
}
else
{
points += bestLose.PointGrid?.ParticipationPoints ?? 0;
}
}
return(points);
}