public async Task <RoboFanEntity> AddAsync(RoboFanEntity newFan, CancellationToken ct = default)
{
_context.RoboFan.Add(newFan);
await _context.SaveChangesAsync(ct);
return(newFan);
}
public async Task <bool> UpdateAsync(RoboFanEntity fan, CancellationToken ct = default)
{
// ensure record exists
if (!await RoboFanExists(fan.Id, ct))
{
return(false);
}
// update the record
_context.RoboFan.Update(fan);
await _context.SaveChangesAsync(ct);
return(true);
}
public static List <RoboFanTeamRanking> GenerateTeamRankings(RoboFanEntity robofan, List <LeagueTeam> leagueTeams)
{
const int maxposteams = 2;
const int maxnegteams = 3;
List <RoboFanTeamRanking> listRankings = new List <RoboFanTeamRanking>();
// get a list of available team ids to use for fan rankings
var teams = (from team in leagueTeams
where (team.Id != robofan.PrimaryTeamId)
select team.Id).ToList <int>();
// select the positive and negative teams for this fan
SelectRandomTeams(maxposteams, 1, robofan, leagueTeams, ref teams, ref listRankings);
SelectRandomTeams(maxnegteams, -1, robofan, leagueTeams, ref teams, ref listRankings);
return(listRankings);
}
private static void SelectRandomTeams(int numteams, int teamranking, RoboFanEntity robofan, List <LeagueTeam> leagueTeams, ref List <int> teamids, ref List <RoboFanTeamRanking> listRankings)
{
// select the number of requested teams
Random randNum = new Random();
for (int index = 0; index < numteams; index++)
{
// create a new object to save the results int
var ranking = new RoboFanTeamRanking();
ranking.RobotFanId = robofan.Id;
ranking.Ranking = teamranking;
// select a random index from the remaining teams and save in the object
var teampos = randNum.Next(teamids.Count - 1);
ranking.LeagueTeamId = teamids[teampos];
ranking.LeagueTeam = (from team in leagueTeams
where team.Id == ranking.LeagueTeamId
select team).SingleOrDefault();
// add the object to the return list
listRankings.Add(ranking);
teamids.RemoveAt(teampos);
}
}
