private RequirementGroupViewModel FindBestMatch(RequirementGroupViewModel needle, IEnumerable <RequirementGroupViewModel> haystack)
{
RequirementGroupViewModel bestMatch = null;
int bestMatchCount = 0;
var requirementExs = RequirementEx.Combine(needle.Requirements.Select(r => r.Requirement));
foreach (var potentialMatch in haystack)
{
// convert to requirement clauses and compare
var compareRequirementExs = RequirementEx.Combine(potentialMatch.Requirements.Select(r => r.Requirement));
int matchCount = compareRequirementExs.Count;
foreach (var requirementEx in requirementExs)
{
for (int i = 0; i < compareRequirementExs.Count; i++)
{
if (compareRequirementExs[i] == requirementEx)
{
compareRequirementExs.RemoveAt(i);
break;
}
}
}
matchCount -= compareRequirementExs.Count;
if (matchCount > bestMatchCount)
{
bestMatchCount = matchCount;
bestMatch = potentialMatch;
}
}
return(bestMatch);
}
protected override ParseErrorExpression ModifyRequirements(AchievementBuilder builder)
{
var requirementsEx = RequirementEx.Combine(builder.CoreRequirements);
foreach (var requirementEx in requirementsEx)
{
var lastCondition = requirementEx.Requirements.Last();
if (lastCondition.Type != RequirementType.None)
{
return(new ParseErrorExpression(string.Format("Cannot apply '{0}' to condition already flagged with {1}", Name.Name, lastCondition.Type)));
}
lastCondition.Type = RequirementType.SubHits;
}
return(null);
}
public bool RequirementsAreEqual(RequirementGroupViewModel that)
{
// quick check to make sure the same number of requirements exist
if (Requirements.Count() != that.Requirements.Count())
{
return(false);
}
// convert to requirement clauses and compare
var requirementExs = RequirementEx.Combine(Requirements.Select(r => r.Requirement));
var compareRequirementExs = RequirementEx.Combine(that.Requirements.Select(r => r.Requirement));
if (requirementExs.Count != compareRequirementExs.Count)
{
return(false);
}
foreach (var requirementEx in requirementExs)
{
bool matched = false;
for (int i = 0; i < compareRequirementExs.Count; i++)
{
if (compareRequirementExs[i] == requirementEx)
{
compareRequirementExs.RemoveAt(i);
matched = true;
break;
}
}
if (!matched)
{
return(false);
}
}
return(true);
}
public void TestCombine(string input, string expected)
{
var achievement = new AchievementBuilder();
achievement.ParseRequirements(Tokenizer.CreateTokenizer(input));
var groups = RequirementEx.Combine(achievement.CoreRequirements);
var builder = new StringBuilder();
foreach (var group in groups)
{
if (builder.Length > 0)
{
builder.Append('|');
}
group.AppendString(builder, NumberFormat.Decimal);
}
Assert.That(builder.ToString(), Is.EqualTo(expected));
// make sure we didn't modify the source requirements
Assert.That(achievement.SerializeRequirements(), Is.EqualTo(input));
}
private static bool CanUseAddHits(List <ICollection <Requirement> > requirements)
{
// make sure each clause ends with a value comparison
foreach (var requirement in requirements)
{
if (requirement.Last().Right.Type != FieldType.Value)
{
return(false);
}
// cannot change OrNext to AddHits if AddHits already exists
if (requirement.Any(r => r.Type == RequirementType.AddHits))
{
return(false);
}
}
// find the first condition that doesn't evaluate to always_false
List <RequirementEx> first;
var firstIndex = 0;
do
{
first = RequirementEx.Combine(requirements[firstIndex]);
if (first.Count >= 1)
{
break;
}
// condition is always_false, try next
++firstIndex;
} while (firstIndex < requirements.Count);
if (first.Count != 1)
{
return(false);
}
var firstOperator = first[0].Requirements.Last().Operator;
for (int i = firstIndex + 1; i < requirements.Count; ++i)
{
var requirementEx = RequirementEx.Combine(requirements[i]);
if (requirementEx.Count == 0)
{
continue;
}
if (requirementEx.Count > 1)
{
return(false);
}
var right = requirementEx[0];
if (right.Evaluate() == false)
{
continue;
}
if (right.Requirements.Last().Operator != firstOperator ||
right.Requirements.Last().Right.Type != FieldType.Value ||
!right.LeftEquals(first[0]))
{
// if both sides are not making the same comparison to different values, they
// could occur in the same frame. don't change the OrNext to an AddHits
return(false);
}
}
return(true);
}
public RequirementGroupViewModel(string label, IEnumerable <Requirement> requirements, IEnumerable <Requirement> compareRequirements, NumberFormat numberFormat, IDictionary <int, string> notes)
{
Label = label;
var requirementExs = RequirementEx.Combine(requirements);
var compareRequirementExs = RequirementEx.Combine(compareRequirements);
var unmatchedCompareRequirementExs = new List <RequirementEx>(compareRequirementExs);
var matches = new Dictionary <RequirementEx, RequirementEx>();
var unmatchedRequirementExs = new List <RequirementEx>();
// first pass: find exact matches
foreach (var requirementEx in requirementExs)
{
bool matched = false;
for (int i = 0; i < unmatchedCompareRequirementExs.Count; i++)
{
if (unmatchedCompareRequirementExs[i] == requirementEx)
{
matches[requirementEx] = unmatchedCompareRequirementExs[i];
unmatchedCompareRequirementExs.RemoveAt(i);
matched = true;
break;
}
}
if (!matched)
{
unmatchedRequirementExs.Add(requirementEx);
}
}
// second pass: find close matches
while (unmatchedRequirementExs.Count > 0)
{
var bestScore = MinimumMatchingScore - 1;
var matchIndex = -1;
var compareIndex = -1;
for (var i = 0; i < unmatchedRequirementExs.Count; i++)
{
var requirementEx = unmatchedRequirementExs[i];
var evaluation = requirementEx.Evaluate();
if (evaluation != null)
{
for (var j = 0; j < unmatchedCompareRequirementExs.Count; j++)
{
if (unmatchedCompareRequirementExs[j].Evaluate() == evaluation)
{
bestScore = 1000;
matchIndex = i;
compareIndex = j;
break;
}
}
}
for (var j = 0; j < unmatchedCompareRequirementExs.Count; j++)
{
var score = CalculateScore(requirementEx, unmatchedCompareRequirementExs[j]);
if (score > bestScore)
{
bestScore = score;
matchIndex = i;
compareIndex = j;
}
}
}
if (matchIndex == -1)
{
break;
}
matches[unmatchedRequirementExs[matchIndex]] = unmatchedCompareRequirementExs[compareIndex];
unmatchedRequirementExs.RemoveAt(matchIndex);
unmatchedCompareRequirementExs.RemoveAt(compareIndex);
}
// construct the output list from the requirements
var pairs = new List <Tuple <RequirementEx, RequirementEx> >(matches.Count + unmatchedCompareRequirementExs.Count);
foreach (var requirementEx in requirementExs)
{
RequirementEx match;
matches.TryGetValue(requirementEx, out match);
pairs.Add(new Tuple <RequirementEx, RequirementEx>(requirementEx, match));
}
// allow an always_true() group to match an empty group
if (pairs.Count == 0 &&
unmatchedCompareRequirementExs.Count == 1 &&
unmatchedCompareRequirementExs[0].Evaluate() == true)
{
pairs.Add(new Tuple <RequirementEx, RequirementEx>(unmatchedCompareRequirementExs[0], unmatchedCompareRequirementExs[0]));
unmatchedCompareRequirementExs.Clear();
}
// third pass: insert any unmatched comparison requirements
if (unmatchedCompareRequirementExs.Count > 0)
{
var indices = new int[compareRequirementExs.Count + 2];
for (int i = 1; i < indices.Length - 1; ++i)
{
indices[i] = -2;
}
indices[0] = -1;
indices[compareRequirementExs.Count + 1] = compareRequirementExs.Count + 1;
for (int i = 0; i < requirementExs.Count; i++)
{
RequirementEx match;
if (matches.TryGetValue(requirementExs[i], out match))
{
indices[compareRequirementExs.IndexOf(match) + 1] = i;
}
}
foreach (var requirementEx in unmatchedCompareRequirementExs)
{
var insertIndex = pairs.Count;
var requirementIndex = compareRequirementExs.IndexOf(requirementEx);
if (requirementIndex < compareRequirementExs.Count - 1)
{
for (int i = 1; i < indices.Length - 1; i++)
{
if (indices[i - 1] == requirementIndex - 1 || indices[i + 1] == requirementIndex + 1)
{
insertIndex = i - 1;
break;
}
}
}
if (insertIndex < pairs.Count)
{
for (int i = 0; i < indices.Length; i++)
{
if (indices[i] >= insertIndex)
{
indices[i]++;
}
}
}
if (insertIndex < indices.Length - 1)
{
indices[insertIndex + 1] = requirementIndex;
}
pairs.Insert(insertIndex, new Tuple <RequirementEx, RequirementEx>(null, requirementEx));
}
}
// convert RequirementEx pairs to RequirementComparisonViewModels
var list = new List <RequirementViewModel>();
foreach (var pair in pairs)
{
AppendRequirements(list, pair.Item1, pair.Item2, numberFormat, notes);
}
// attempt to merge requirements that may have been separated into separate RequirementExs
int leftIndex, rightIndex;
while (GetBestMerge(list, out leftIndex, out rightIndex))
{
list[leftIndex] = new RequirementComparisonViewModel(list[leftIndex].Requirement,
((RequirementComparisonViewModel)list[rightIndex]).CompareRequirement, numberFormat, notes);
list.RemoveAt(rightIndex);
}
Requirements = list;
}