SPT-Server-Build/Libraries/SPTarkov.Server.Core/Extensions/MongoIDExtensions.cs

using SPTarkov.Server.Core.Models.Common;

namespace SPTarkov.Server.Core.Extensions
{
    public static class MongoIDExtensions
    {
        /// <summary>
        /// Determines whether the specified <see cref="MongoId"/> is a valid 24-character hexadecimal string,
        /// which is the standard format for MongoDB ObjectIds.
        /// </summary>
        /// <param name="mongoId">The <see cref="MongoId"/> to validate.</param>
        /// <returns><see langword="true"/> if the <paramref name="mongoId"/> is a valid MongoDB ObjectId; otherwise, <see langword="false"/>.</returns>
        public static bool IsValidMongoId(this MongoId mongoId)
        {
            var span = mongoId.ToString().AsSpan();

            if (span.Length != 24)
            {
                return false;
            }

            for (var i = 0; i < 24; i++)
            {
                var c = span[i];
                var isHex =
                    (c >= '0' && c <= '9') ||
                    (c >= 'a' && c <= 'f') ||
                    (c >= 'A' && c <= 'F');

                if (!isHex)
                {
                    return false;
                }
            }

            return true;
        }

        /// <summary>
        /// Determines whether the specified string is a valid 24-character hexadecimal representation
        /// of a MongoDB ObjectId.
        /// </summary>
        /// <param name="mongoId">The string to validate as a MongoDB ObjectId.</param>
        /// <returns><see langword="true"/> if the <paramref name="mongoId"/> is a valid MongoDB ObjectId; otherwise, <see langword="false"/>.</returns>
        public static bool IsValidMongoId(this string mongoId)
        {
            var span = mongoId.AsSpan();

            if (span.Length != 24)
            {
                return false;
            }

            for (var i = 0; i < 24; i++)
            {
                var c = span[i];
                var isHex =
                    (c >= '0' && c <= '9') ||
                    (c >= 'a' && c <= 'f') ||
                    (c >= 'A' && c <= 'F');

                if (!isHex)
                {
                    return false;
                }
            }

            return true;
        }
    }
}