private static Expression<Func<T, bool>> GetComparisonExpression<T>(Expression<Func<T, bool>> predicate, SearchCriteria criteria, SearchOperation operation) where T : ISearchResult
{
var boost = criteria.Boost;
var value = criteria.Value;
switch (value)
{
case DateTime _:
var compareDateTime = (DateTime)value;
predicate = (criteria.Invert || criteria.Filter == FilterType.LessThan)
? predicate.AddPredicate(i => ((DateTime)i[(ObjectIndexerKey)criteria.Field] < compareDateTime).Boost(boost), operation)
: predicate.AddPredicate(i => ((DateTime)i[(ObjectIndexerKey)criteria.Field] > compareDateTime).Boost(boost), operation);
break;
case double _:
var compareDouble = (double)value;
predicate = (criteria.Invert || criteria.Filter == FilterType.LessThan)
? predicate.AddPredicate(i => ((double)i[(ObjectIndexerKey)criteria.Field] < compareDouble).Boost(boost), operation)
: predicate.AddPredicate(i => ((double)i[(ObjectIndexerKey)criteria.Field] > compareDouble).Boost(boost), operation);
break;
case int _:
var compareInt = (int)value;
predicate = (criteria.Invert || criteria.Filter == FilterType.LessThan)
? predicate.AddPredicate(i => ((int)i[(ObjectIndexerKey)criteria.Field] < compareInt).Boost(boost), operation)
: predicate.AddPredicate(i => ((int)i[(ObjectIndexerKey)criteria.Field] > compareInt).Boost(boost), operation);
break;
}
return predicate;
}
private static Expression<Func<T, bool>> GetRangeExpression<T>(Expression<Func<T, bool>> predicate, SearchCriteria criteria, SearchOperation operation) where T : ISearchResult
{
var inclusion = (criteria.Filter == FilterType.InclusiveRange)
? Inclusion.Both
: Inclusion.None;
var boost = criteria.Boost;
var value = criteria.Value;
if (value is object[])
{
switch (value)
{
case string[] s:
value = s;
break;
case DateTime[] datetime:
value = datetime;
break;
case double[] d:
value = d;
break;
case int[] i:
value = i;
break;
}
}
switch (value)
{
case string[] _:
var pairString = (string[])value;
var leftString = pairString[0];
var rightString = pairString[1];
predicate = criteria.Invert
? predicate.AddPredicate(i => !i[criteria.Field].Between(leftString, rightString, inclusion).Boost(boost), operation)
: predicate.AddPredicate(i => i[criteria.Field].Between(leftString, rightString, inclusion).Boost(boost), operation);
break;
case DateTime[] _:
var pairDateTime = (DateTime[])value;
var leftDateTime = pairDateTime[0];
var rightDateTime = pairDateTime[1];
predicate = criteria.Invert
? predicate.AddPredicate(i => !((DateTime)i[(ObjectIndexerKey)criteria.Field]).Between(leftDateTime, rightDateTime, inclusion).Boost(boost), operation)
: predicate.AddPredicate(i => ((DateTime)i[(ObjectIndexerKey)criteria.Field]).Between(leftDateTime, rightDateTime, inclusion).Boost(boost), operation);
break;
case double[] _:
var pairDouble = (double[])value;
var leftDouble = pairDouble[0];
var rightDouble = pairDouble[1];
predicate = criteria.Invert
? predicate.AddPredicate(i => !((double)i[(ObjectIndexerKey)criteria.Field]).Between(leftDouble, rightDouble, inclusion).Boost(boost), operation)
: predicate.AddPredicate(i => ((double)i[(ObjectIndexerKey)criteria.Field]).Between(leftDouble, rightDouble, inclusion).Boost(boost), operation);
break;
case int[] _:
var pairInt = (int[])value;
var leftInt = pairInt[0];
var rightInt = pairInt[1];
predicate = criteria.Invert
? predicate.AddPredicate(i => !((int)i[(ObjectIndexerKey)criteria.Field]).Between(leftInt, rightInt, inclusion).Boost(boost), operation)
: predicate.AddPredicate(i => ((int)i[(ObjectIndexerKey)criteria.Field]).Between(leftInt, rightInt, inclusion).Boost(boost), operation);
break;
}
return predicate;
}