public ResultHandler <IEnumerable <Expression <Func <EventModel, bool> > > > BuildExpressions(IEnumerable <FilterStatement <EventModel> > filterStatements)
{
try
{
List <Expression <Func <EventModel, bool> > > result = new List <Expression <Func <EventModel, bool> > >();
foreach (var filterStatement in filterStatements)
{
IFilter <EventModel> filter = this._eventFilterResolver(filterStatement.FilterType);
ResultHandler <Expression <Func <EventModel, bool> > > expressionResult = filter.BuildExpression(filterStatement);
if (!expressionResult.Success)
{
this._logger.LogError(expressionResult.ErrorMessage);
return(ResultHandler.Fail <IEnumerable <Expression <Func <EventModel, bool> > > >(expressionResult.ErrorCode));
}
result.Add(expressionResult.Value);
}
return(ResultHandler.Ok <IEnumerable <Expression <Func <EventModel, bool> > > >(result));
}
catch (Exception ex)
{
return(ResultHandler.Fail <IEnumerable <Expression <Func <EventModel, bool> > > >(ex));
}
}