public void ComposeBallots(BallotCompositionMethod method)
{
FinalBallots = new Dictionary<int, MeetingElectionCandidates>();
QuotedMasterList = GenerateBallot(rawElectionResult, -1, BallotCompositionMethod.Unmixed);
if (geographicLists.Count == 0)
{
GenerateGeographicLists();
}
foreach (Geography ballotGeography in BallotGeographies)
{
FinalBallots[ballotGeography.Identity] = GenerateBallot(geographicLists[ballotGeography.Identity], 22,
method);
}
}
public void ComposeBallots(BallotCompositionMethod method)
{
FinalBallots = new Dictionary <int, MeetingElectionCandidates>();
QuotedMasterList = GenerateBallot(rawElectionResult, -1, BallotCompositionMethod.Unmixed);
if (geographicLists.Count == 0)
{
GenerateGeographicLists();
}
foreach (Geography ballotGeography in BallotGeographies)
{
FinalBallots[ballotGeography.Identity] = GenerateBallot(geographicLists[ballotGeography.Identity], 22,
method);
}
}
/// <summary>
/// Gets the position of the master list to use for this position on the local list.
/// </summary>
/// <param name="currentPosition">The position of a particular ballot.</param>
/// <param name="method">The composition method to use.</param>
/// <returns>The position to pick from the master list, or zero if not from the master list.</returns>
private int GetMasterListPosition(int currentPosition, BallotCompositionMethod method)
{
if (method == BallotCompositionMethod.Unmixed)
{
return(0); // always use local
}
if (method == BallotCompositionMethod.TopTenNational)
{
if (currentPosition <= 10)
{
return(currentPosition);
}
return(0);
}
if (method == BallotCompositionMethod.TopFiveNational)
{
if (currentPosition <= 5)
{
return(currentPosition);
}
return(0);
}
if (method == BallotCompositionMethod.InterleavedTenNational)
{
if ((currentPosition % 2 == 1) && currentPosition < 20)
{
return(currentPosition / 2 + 1);
}
return(0);
}
throw new NotImplementedException("Unimplemented method");
}
private MeetingElectionCandidates GenerateBallot(MeetingElectionCandidates rawList, int candidateCount,
BallotCompositionMethod method)
{
MeetingElectionCandidates result = new MeetingElectionCandidates();
Dictionary <int, bool> takenCandidates = new Dictionary <int, bool>();
if (candidateCount == -1)
{
candidateCount = rawList.Count;
}
// First, cancel out the defected candidates. Expensive op, but don't care.
for (int rawIndex = 0; rawIndex < rawList.Count; rawIndex++)
{
if (CandidatePersonIdDefected(rawList[rawIndex].PersonId))
{
takenCandidates[rawIndex] = true;
}
}
if (candidateCount == rawList.Count)
{
candidateCount -= takenCandidates.Count;
}
// Assemble list.
while (result.Count < candidateCount)
{
// Add a candidate.
//
// Should we add a candidate from the raw list or from the quoted master list?
int masterPosition = GetMasterListPosition(result.Count + 1, method);
if (masterPosition > 0)
{
// We should add a candidate from the master list, no quota calculations, BUT ONLY if this candidate
// hasn't already been added from the district list.
int rawListIndex = FindCandidateIndex(QuotedMasterList[masterPosition - 1].InternalPollCandidateId,
rawList);
if (rawListIndex >= 0 && !takenCandidates.ContainsKey(rawListIndex))
{
// The master list candidate is also on the district list, but has not been added. Add
// the candidate in the master list position.
result.Add(QuotedMasterList[masterPosition - 1]);
takenCandidates[rawListIndex] = true;
continue;
}
if (rawListIndex == -1)
{
// The master list candidate is not on the district list. Add the candidate.
result.Add(QuotedMasterList[masterPosition - 1]);
continue;
}
// Getting here, the candidate on the master position had already been placed on the list through his
// or her district, so fallthrough to local candidates for this master position
}
// Add a candidate from the local list. First, try adding the next available candidate.
// If this puts us outside of the allowed gender quota, pick the next candidate of the
// underrepresented gender instead.
int nextCandidateIndex = 0;
while (takenCandidates.ContainsKey(nextCandidateIndex))
{
nextCandidateIndex++;
}
PersonGender candidateGender = rawList[nextCandidateIndex].Person.Gender;
double currentMaleQuota = CalculateListMaleQuota(result, candidateGender);
// Here, we account an extremely rare situation where the correct quota is not even obtainable, e.g.
// for position #3 where #1 is male and #2 is female and with a quota of 40%. Either way, it will
// fall outside of bounds (33% or 66%). If so, ignore the quota if it is not obtainable.
PersonGender oppositeGender = (candidateGender == PersonGender.Male
? PersonGender.Female
: PersonGender.Male);
double alternateMaleQuota = CalculateListMaleQuota(result, oppositeGender);
// If currentMaleQuota is outside of bounds AND the alternate quota IS inside of bounds...
if (currentMaleQuota < GenderQuota || currentMaleQuota > (1.0 - GenderQuota))
{
if (alternateMaleQuota >= GenderQuota && alternateMaleQuota <= (1.0 - GenderQuota))
{
// ...pick the alternate (underrepresented) candidate
try
{
nextCandidateIndex = GetNextSpecificGenderCandidate(rawList, takenCandidates,
oppositeGender);
}
catch (ArgumentOutOfRangeException)
{
// there isn't any more candidate of the requested gender, so go with what we have
}
}
}
result.Add(rawList[nextCandidateIndex]);
takenCandidates[nextCandidateIndex] = true;
}
return(result);
}
/// <summary>
/// Gets the position of the master list to use for this position on the local list.
/// </summary>
/// <param name="currentPosition">The position of a particular ballot.</param>
/// <param name="method">The composition method to use.</param>
/// <returns>The position to pick from the master list, or zero if not from the master list.</returns>
private int GetMasterListPosition (int currentPosition, BallotCompositionMethod method)
{
if (method == BallotCompositionMethod.Unmixed)
{
return 0; // always use local
}
if (method == BallotCompositionMethod.TopTenNational)
{
if (currentPosition <= 10)
{
return currentPosition;
}
return 0;
}
if (method == BallotCompositionMethod.TopFiveNational)
{
if (currentPosition <= 5)
{
return currentPosition;
}
return 0;
}
if (method == BallotCompositionMethod.InterleavedTenNational)
{
if ((currentPosition % 2 == 1) && currentPosition < 20)
{
return (currentPosition/2 + 1);
}
return 0;
}
throw new NotImplementedException("Unimplemented method");
}
private MeetingElectionCandidates GenerateBallot (MeetingElectionCandidates rawList, int candidateCount, BallotCompositionMethod method)
{
MeetingElectionCandidates result = new MeetingElectionCandidates();
Dictionary<int, bool> takenCandidates = new Dictionary<int, bool>();
if (candidateCount == -1)
{
candidateCount = rawList.Count;
}
// First, cancel out the defected candidates. Expensive op, but don't care.
for (int rawIndex = 0; rawIndex < rawList.Count; rawIndex++)
{
if (this.CandidatePersonIdDefected(rawList [rawIndex].PersonId))
{
takenCandidates[rawIndex] = true;
}
}
if (candidateCount == rawList.Count)
{
candidateCount -= takenCandidates.Count;
}
// Assemble list.
while (result.Count < candidateCount)
{
// Add a candidate.
//
// Should we add a candidate from the raw list or from the quoted master list?
int masterPosition = GetMasterListPosition (result.Count + 1, method);
if (masterPosition > 0)
{
// We should add a candidate from the master list, no quota calculations, BUT ONLY if this candidate
// hasn't already been added from the district list.
int rawListIndex = FindCandidateIndex (QuotedMasterList[masterPosition - 1].InternalPollCandidateId,
rawList);
if (rawListIndex >= 0 && !takenCandidates.ContainsKey(rawListIndex))
{
// The master list candidate is also on the district list, but has not been added. Add
// the candidate in the master list position.
result.Add(QuotedMasterList[masterPosition - 1]);
takenCandidates[rawListIndex] = true;
continue;
}
if (rawListIndex == -1)
{
// The master list candidate is not on the district list. Add the candidate.
result.Add(QuotedMasterList[masterPosition - 1]);
continue;
}
// Getting here, the candidate on the master position had already been placed on the list through his
// or her district, so fallthrough to local candidates for this master position
}
// Add a candidate from the local list. First, try adding the next available candidate.
// If this puts us outside of the allowed gender quota, pick the next candidate of the
// underrepresented gender instead.
int nextCandidateIndex = 0;
while (takenCandidates.ContainsKey(nextCandidateIndex))
{
nextCandidateIndex++;
}
PersonGender candidateGender = rawList[nextCandidateIndex].Person.Gender;
double currentMaleQuota = CalculateListMaleQuota(result, candidateGender);
// Here, we account an extremely rare situation where the correct quota is not even obtainable, e.g.
// for position #3 where #1 is male and #2 is female and with a quota of 40%. Either way, it will
// fall outside of bounds (33% or 66%). If so, ignore the quota if it is not obtainable.
PersonGender oppositeGender = (candidateGender == PersonGender.Male
? PersonGender.Female
: PersonGender.Male);
double alternateMaleQuota = CalculateListMaleQuota(result, oppositeGender);
// If currentMaleQuota is outside of bounds AND the alternate quota IS inside of bounds...
if (currentMaleQuota < GenderQuota || currentMaleQuota > (1.0 - GenderQuota))
{
if (alternateMaleQuota >= GenderQuota && alternateMaleQuota <= (1.0 - GenderQuota))
{
// ...pick the alternate (underrepresented) candidate
try
{
nextCandidateIndex = GetNextSpecificGenderCandidate(rawList, takenCandidates, oppositeGender);
}
catch (ArgumentOutOfRangeException)
{
// there isn't any more candidate of the requested gender, so go with what we have
}
}
}
result.Add(rawList[nextCandidateIndex]);
takenCandidates[nextCandidateIndex] = true;
}
return result;
}
