public static Predicate <ComponentEnum> GetFilter(
ComponentEnum withFilter,
ComponentEnum withoutFilter,
List <ComponentEnum> withEitherFilters,
List <ComponentEnum> withoutEitherFilters)
{
withFilter = withFilter.Copy();
withoutFilter = withoutFilter.Copy();
withEitherFilters = withEitherFilters?.ToList();
withoutEitherFilters = withoutEitherFilters?.ToList();
string key = $"{withFilter} {withoutFilter} {string.Join(" ", withEitherFilters ?? Enumerable.Empty<ComponentEnum>())} {string.Join(" ", withoutEitherFilters ?? Enumerable.Empty<ComponentEnum>())}";
Predicate <ComponentEnum> filter;
lock (_filters)
{
if (!_filters.TryGetValue(key, out filter))
{
ComponentEnum singleWithEitherFilter = withEitherFilters?.FirstOrDefault() ?? default;
ComponentEnum singleWithoutEitherFilter = withoutEitherFilters?.FirstOrDefault() ?? default;
filter = (withoutFilter.IsNull, withEitherFilters?.Count, withoutEitherFilters?.Count) switch
{
(true, null, null) => c => c.Contains(withFilter),
(true, 1, null) => c => c.Contains(withFilter) && !c.DoNotContains(singleWithEitherFilter),
(true, _, null) => c => c.Contains(withFilter) && withEitherFilters.All(f => !c.DoNotContains(f)),
(true, null, 1) => c => c.Contains(withFilter) && !c.Contains(singleWithoutEitherFilter),
(true, null, _) => c => c.Contains(withFilter) && withoutEitherFilters.All(f => !c.Contains(f)),
(true, 1, 1) => c => c.Contains(withFilter) && !c.DoNotContains(singleWithEitherFilter) && !c.Contains(singleWithoutEitherFilter),
(true, 1, _) => c => c.Contains(withFilter) && !c.DoNotContains(singleWithEitherFilter) && withoutEitherFilters.All(f => !c.Contains(f)),
(true, _, 1) => c => c.Contains(withFilter) && withEitherFilters.All(f => !c.DoNotContains(f)) && !c.Contains(singleWithoutEitherFilter),
(true, _, _) => c => c.Contains(withFilter) && withEitherFilters.All(f => !c.DoNotContains(f)) && withoutEitherFilters.All(f => !c.Contains(f)),
(false, null, null) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter),
(false, 1, null) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && !c.DoNotContains(singleWithEitherFilter),
(false, _, null) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && withEitherFilters.All(f => !c.DoNotContains(f)),
(false, null, 1) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && !c.Contains(singleWithoutEitherFilter),
(false, null, _) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && withoutEitherFilters.All(f => !c.Contains(f)),
(false, 1, 1) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && !c.DoNotContains(singleWithEitherFilter) && !c.Contains(singleWithoutEitherFilter),
(false, 1, _) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && !c.DoNotContains(singleWithEitherFilter) && withoutEitherFilters.All(f => !c.Contains(f)),
(false, _, 1) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && withEitherFilters.All(f => !c.DoNotContains(f)) && !c.Contains(singleWithoutEitherFilter),
(false, _, _) => c => c.Contains(withFilter) && c.DoNotContains(withoutFilter) && withEitherFilters.All(f => !c.DoNotContains(f)) && withoutEitherFilters.All(f => !c.Contains(f)),
};
_filters.Add(key, filter);
}
}
public static Predicate <ComponentEnum> GetFilter(ComponentEnum withFilter, ComponentEnum withoutFilter, List <ComponentEnum> withEitherFilters, List <ComponentEnum> withoutEitherFilters)
{
string key = $"{withFilter} {withoutFilter} {string.Join(" ", withEitherFilters ?? Enumerable.Empty<ComponentEnum>())} {string.Join(" ", withoutEitherFilters ?? Enumerable.Empty<ComponentEnum>())}";
Predicate <ComponentEnum> filter;
lock (_filters)
{
if (!_filters.TryGetValue(key, out filter))
{
filter = GetLambdaFilter(withFilter, withoutFilter, withEitherFilters, withoutEitherFilters);
_filters.Add(key, filter);
}
}
return(filter);
}
private static Predicate <ComponentEnum> GetLambdaFilter(
ComponentEnum withFilter,
ComponentEnum withoutFilter,
List <ComponentEnum> withEitherFilters,
List <ComponentEnum> withoutEitherFilters)
{
if (withoutFilter.IsNull)
{
if (withEitherFilters is null)
{
if (withoutEitherFilters is null)
{
return(c => c.Contains(withFilter));
}
if (withoutEitherFilters.Count == 1)
{
ComponentEnum withoutEitherFilter = withoutEitherFilters[0];
return(c => c.Contains(withFilter) &&
!c.Contains(withoutEitherFilter));
}
return(c => c.Contains(withFilter) &&
withoutEitherFilters.All(f => !c.Contains(f)));
}
else if (withoutEitherFilters is null)
{
if (withEitherFilters.Count == 1)
{
ComponentEnum withEitherFilter = withEitherFilters[0];
return(c => c.Contains(withFilter) &&
!c.DoNotContains(withEitherFilter));
}
return(c => c.Contains(withFilter) &&
withEitherFilters.All(f => !c.DoNotContains(f)));
}
return(c => c.Contains(withFilter) &&
withEitherFilters.All(f => !c.DoNotContains(f)) &&
withoutEitherFilters.All(f => !c.Contains(f)));
}
else if (withEitherFilters is null)
{
if (withoutEitherFilters is null)
{
return(c => c.Contains(withFilter) &&
c.DoNotContains(withoutFilter));
}
if (withoutEitherFilters.Count == 1)
{
ComponentEnum withoutEitherFilter = withoutEitherFilters[0];
return(c => c.Contains(withFilter) &&
c.DoNotContains(withoutFilter) &&
!c.Contains(withoutEitherFilter));
}
return(c => c.Contains(withFilter) &&
c.DoNotContains(withoutFilter) &&
withoutEitherFilters.All(f => !c.Contains(f)));
}
else if (withoutEitherFilters is null)
{
if (withEitherFilters.Count == 1)
{
ComponentEnum withEitherFilter = withEitherFilters[0];
return(c => c.Contains(withFilter) &&
c.DoNotContains(withoutFilter) &&
!c.DoNotContains(withEitherFilter));
}
return(c => c.Contains(withFilter) &&
c.DoNotContains(withoutFilter) &&
withEitherFilters.All(f => !c.DoNotContains(f)));
}
return(c => c.Contains(withFilter) &&
c.DoNotContains(withoutFilter) &&
withEitherFilters.All(f => !c.DoNotContains(f)) &&
withoutEitherFilters.All(f => !c.Contains(f)));
}