inabox/InABox.Mobile/InABox.Mobile.Shared/Converters/MultiConverters/Matcher/AbstractMatcher.cs

using System.Collections.Generic;
using System.Linq;

namespace InABox.Mobile
{

    public enum MatchComparison
    {
        EqualTo,
        NotEqualTo
    }

    public enum MatchType
    {
        Any,
        All
    }
    
    public class AbstractMatcher<T> : AbstractMultiConverter<T,bool>
    {
        public MatchComparison Comparison { get; set; }
        
        public MatchType Type { get; set; }
        
        public T Value { get; set; }
        
        protected override bool Convert(IEnumerable<T> value, object parameter = null)
        {
            return Type switch
            {
                MatchType.Any => Comparison == MatchComparison.EqualTo
                    ? value.Any(x => Equals(Value, x))
                    : value.Any(x => !Equals(Value, x)),
                MatchType.All => Comparison == MatchComparison.EqualTo
                    ? value.All(x => Equals(Value, x))
                    : value.All(x => !Equals(Value, x)),
                _ => false
            };
        }
    }
}