private IEnumerable<ConditionEvaluation> EvaluateItemConditions(IHaveFilterConditions currentItem, IDictionary<string, string> runtimeContext, IEnumerable<IHaveFilterConditions> items)
{
foreach (KeyValuePair<string, string> runtimeContextItem in runtimeContext)
{
foreach (var condition in currentItem.FilterConditions)
{
var evalContext = new ConditionEvaluationContext(runtimeContextItem, runtimeContext, items);
var relationToContext = EvaluateCondition(evalContext, condition);
yield return new ConditionEvaluation(relationToContext, evalContext, condition);
}
}
}
private RelationToContextEnum EvaluateCondition(ConditionEvaluationContext context, IFilterCondition condition)
{
if (condition.Subject == context.CurrentRuntimeContextItem.Key)
{
bool evaluationResult = condition.Evaluate(context);
if (condition.Negate)
{
evaluationResult = !evaluationResult;
}
return evaluationResult ? RelationToContextEnum.True : RelationToContextEnum.False;
}
return RelationToContextEnum.Neutral;
}
public ConditionEvaluation(RelationToContextEnum relationToContext, ConditionEvaluationContext context, IFilterCondition condition)
{
RelationToContext = relationToContext;
Context = context;
Condition = condition;
}
public bool Evaluate(ConditionEvaluationContext context)
{
return context.CurrentRuntimeContextItem.Key == Subject && context.CurrentRuntimeContextItem.Value == Value;
}