public bool IsEmptyFilter(FilterCustom filter)
{
if (filter.MaxCost == 0 && filter.MinCost == 0 && filter.AircraftModelId == 0 && filter.AirlineId == 0)
{
return(true);
}
return(false);
}
private void WriteFilter(StringWriter w, FilterItemBase filter, string parent, ref int varindex)
{
List <string> parameters = new List <string>();
switch (filter.FilterType)
{
case EFilterType.Custom:
{
w.Write(parent + ".AddExpression(item => ");
FilterCustom custom = (FilterCustom)filter;
var result = CodeParameterPattern.Matches(custom.Code);
foreach (Match item in result)
{
var name = item.Groups[1].Value;
if (!parameters.Contains(name))
{
parameters.Add(name);
}
}
if (parameters.Count == 0)
{
w.Write(custom.Code);
}
else
{
w.Write(CodeParameterPattern.Replace(custom.Code, m => m.Groups[1].Value));
}
}
break;
case EFilterType.MultiValue:
{
FilterMultiValue stan = (FilterMultiValue)filter;
string expression;
EDataBaseType expressionDataType;
ProcessExpression(stan.Name, stan.Function, stan.FunctionParemeter, out expression, out expressionDataType);
switch (stan.Operator)
{
case EOperator.Between:
case EOperator.NotBetween:
string value1 = QueryMetadata.GetRightExpression(expressionDataType, stan.Value1Type, stan.Value1, parameters, false);
List <string> valueNames = new List <string>();
if (stan.Value1Type != EValueType.Property)
{
value1 = ProcessVariable(w, value1, ref varindex);
if (stan.Value1Type == EValueType.Const && stan.Value1.StartsWith("@"))
{
valueNames.Add(value1);
}
}
string value2 = QueryMetadata.GetRightExpression(expressionDataType, stan.Value2Type, stan.Value2, parameters, false);
if (stan.Value2Type != EValueType.Property)
{
value2 = ProcessVariable(w, value2, ref varindex);
if (stan.Value2Type == EValueType.Const && stan.Value2.StartsWith("@"))
{
valueNames.Add(value2);
}
}
if (valueNames.Count > 0)
{
w.WriteLine($"if({string.Join(" && ", valueNames.Select(a => a + " != null").ToArray())})");
}
w.Write(parent + ".AddExpression(item => ");
w.Write(QueryMetadata.Operators[stan.Operator], expression, value1, value2);
break;
}
}
break;
case EFilterType.Standard:
{
FilterStandard stan = (FilterStandard)filter;
string expression;
EDataBaseType expressionDataType;
ProcessExpression(stan.Name, stan.Function, stan.FunctionParemeter, out expression, out expressionDataType);
switch (stan.Operator)
{
case EOperator.IsNull:
case EOperator.NotIsNull:
w.Write(parent + ".AddExpression(item => ");
w.Write(QueryMetadata.Operators[stan.Operator], expression);
break;
default:
bool isArray = stan.Operator == EOperator.IN;
string value = QueryMetadata.GetRightExpression(expressionDataType, stan.ValueType, stan.Value, parameters, isArray);
if (stan.ValueType != EValueType.Property)
{
value = ProcessVariable(w, value, ref varindex);
if (stan.ValueType == EValueType.Const && stan.Value.StartsWith("@"))
{
w.WriteLine($"if({value}!=null)");
}
}
w.Write(parent + ".AddExpression(item => ");
w.Write(QueryMetadata.Operators[stan.Operator], expression, value);
break;
}
}
break;
}
w.Write(",EExpressionConnect." + filter.Connection.ToString());
if (parameters.Count > 0)
{
w.Write(",new string[] { " + string.Join(",", parameters.Distinct().Select(a => "\"" + a + "\"").ToArray()) + " }");
}
w.WriteLine(");");
}
