private Expression <Func <TEntity, bool> > DateTimeExpr(DateTimeFromToFilterComplex dateTimeFromToFilter,
ParameterExpression item)
{
Expression <Func <TEntity, bool> > lambdaExpr;
if (EntityPropertyType.IsNullable())
{
var(fromDateExpressionInfo, toDateExpressionInfo) =
BuildExpressionDateTimeInfo(dateTimeFromToFilter, true);
MemberExpression memberExpression = dateTimeFromToFilter.TruncateTime
? Expression.Property(Expression.Property(PropertyOrField, "Value"), "Date")
: PropertyOrField;
var ifTrue = memberExpression
.GreaterLessThanBuilderExpressions(fromDateExpressionInfo, toDateExpressionInfo,
BitwiseOperationExpressions.AndAlso);
var nullOrGreaterLess = Expression.AndAlso(
Expression.Property(PropertyOrField, "HasValue"),
ifTrue);
lambdaExpr = nullOrGreaterLess.LambdaExpressionBuilder <TEntity>(item);
}
else
{
var(dateFromExprInfo, dateToExprInfo) = BuildExpressionDateTimeInfo(dateTimeFromToFilter, false);
var entityPropTruncated = dateTimeFromToFilter.TruncateTime
? Expression.Property(PropertyOrField, "Date")
: PropertyOrField;
var dateTimeExpr =
entityPropTruncated.GreaterLessThanBuilderExpressions(dateFromExprInfo, dateToExprInfo,
BitwiseOperationExpressions.AndAlso);
lambdaExpr = dateTimeExpr.LambdaExpressionBuilder <TEntity>(item);
}
return(lambdaExpr);
}
internal static (ExpressionDateTimeInfo dateFromExprInfo, ExpressionDateTimeInfo dateToExprInfo) BuildExpressionDateTimeInfo(DateTimeFromToFilterComplex dateTimeFromToFilter, bool nullable)
{
var dateTimeValueDateFrom = dateTimeFromToFilter.DateFrom;
var dateTimeValueDateTo = dateTimeFromToFilter.DateTo;
var fromDate = dateTimeValueDateFrom.DateTime;
DateTime?toDate = default;
var fromDateExprType =
dateTimeValueDateFrom.ExpressionType ?? CompareExpressionType.GreaterThanOrEqual;
CompareExpressionType toDateExprType = default;
if (dateTimeValueDateTo != null)
{
toDateExprType = dateTimeValueDateTo.ExpressionType ?? CompareExpressionType.LessThanOrEqual;
toDate = dateTimeValueDateTo.DateTime;
}
ExpressionDateTimeInfo dateToExprInfo = default;
ConstantExpression fromDateExpressionConstant;
if (dateTimeFromToFilter.TruncateTime)
{
fromDateExpressionConstant = Expression.Constant(fromDate.Value.Date, typeof(DateTime));
}
else
{
fromDateExpressionConstant = nullable
? Expression.Constant(fromDate, typeof(DateTime?))
: Expression.Constant((DateTime)fromDate, typeof(DateTime));
}
if (toDate.HasValue)
{
ConstantExpression toDateExpressionConstant;
if (dateTimeFromToFilter.TruncateTime)
{
toDateExpressionConstant = Expression.Constant(toDate.Value.Date, typeof(DateTime));
}
else
{
toDateExpressionConstant = nullable
? Expression.Constant(toDate, typeof(DateTime?))
: Expression.Constant((DateTime)toDate, typeof(DateTime));
}
dateToExprInfo = new ExpressionDateTimeInfo {
Constant = toDateExpressionConstant, ExpressionType = toDateExprType, DateTime = toDate
};
// (rightToDate, dateToExprType);
}
else
{
dateToExprInfo = new ExpressionDateTimeInfo();
}
var dateFromExprInfo = new ExpressionDateTimeInfo {
Constant = fromDateExpressionConstant, ExpressionType = fromDateExprType, DateTime = fromDate
};
return(dateFromExprInfo, dateToExprInfo);
}
