DiscordChatExporter/DiscordChatExporter.Core/Exporting/Filtering/MentionsMessageFilter.cs

using System;
using System.Linq;
using DiscordChatExporter.Core.Discord.Data;

namespace DiscordChatExporter.Core.Exporting.Filtering
{
    internal class MentionsMessageFilter : MessageFilter
    {
        private readonly string _value;

        public MentionsMessageFilter(string value) => _value = value;

        public override bool IsMatch(Message message) => message.MentionedUsers.Any(user =>
            string.Equals(_value, user.Name, StringComparison.OrdinalIgnoreCase) ||
            string.Equals(_value, user.FullName, StringComparison.OrdinalIgnoreCase) ||
            string.Equals(_value, user.Id.ToString(), StringComparison.OrdinalIgnoreCase)
        );
    }
}