public void ShouldFilterByIsNotCondition()
{
FilterCondition condition = new FilterCondition
{
Field = new ConversationField {
Name = "Department Assignee", DataType = FieldDataType.Option
},
MatchType = ConditionMatchType.IsNot,
Value = "@My Department"
};
var options = new ExpressionBuildOptions
{
UserId = 1,
MyDepartments = new int[] { 1 }
};
var expression = new DepartmentAssigneeExpression().SetOptions(options).Build(condition);
var conditions = new List <Conversation>
{
new Conversation {
Id = 1, DepartmentId = 1
},
new Conversation {
Id = 2, DepartmentId = null
}
}.AsQueryable();
var result = conditions.Where(expression).ToList();
Assert.Equal(1, result.Count);
Assert.Equal(2, result.First().Id);
}
public Expression <Func <Conversation, bool> > Create(Filter filter, ExpressionBuildOptions options)
{
var expressions = filter.Conditions.Select(t => GetConditionExpression(t, options)).Where(t => t != null).ToList();
if (expressions.Count() == 0)
{
return(t => true);
}
if (filter.Type == FilterType.All)
{
var predicate = PredicateBuilder.New <Conversation>();
foreach (var expression in expressions)
{
predicate = predicate.And(expression);
}
return(predicate);
}
if (filter.Type == FilterType.Any)
{
var predicate = PredicateBuilder.New <Conversation>();
foreach (var expression in expressions)
{
predicate = predicate.Or(expression);
}
return(predicate);
}
if (filter.Type == FilterType.LogicalExpression)
{
var predicate = PredicateBuilder.New <Conversation>();
var expressionDic = filter.Conditions.ToDictionary(t => t.Index, t => GetConditionExpression(t, options));
var buildResult = LogicalExpressionBuilder.Build(expressionDic, filter.LogicalExpression);
if (buildResult.IsSuccess)
{
return(predicate.And(buildResult.Expression));
}
}
return(t => true);
}
private Expression <Func <Conversation, bool> > GetConditionExpression(FilterCondition condition, ExpressionBuildOptions options)
{
foreach (var expression in _conditionExpressions)
{
if (expression.IsMatch(condition))
{
return(expression.SetOptions(options).Build(condition));
}
}
return(null);
}