Knocks/BackEnd/Knoks.Core/Entities/Uid.cs

using HashidsNet;

namespace Knoks.Core.Entities
{
    public static class Uid
    {
        private static readonly Hashids LeadHashids = new Hashids("0oSe-yc2M7_5hQro!pxp45d", 8);
        private static readonly Hashids LoanRequestHashids = new Hashids("l_EOC36t#4yyI6D-b36TyJ5", 8);
        private static readonly Hashids LoanRequestAndUserHashids = new Hashids("8#TGF(6t&8jkU8P+W89Yqz3", 8);

        //-- Lead Uid --
        public static string Lead(long? leadId)
        {
            return leadId == null ? null : LeadHashids.EncodeLong(leadId.Value);
        }

        public static long? Lead(string leadUid)
        {
            return leadUid == null ? null : (long?)LeadHashids.DecodeLong(leadUid)[0];
        }

        //-- LoanRequest Uid --
        public static string LoanRequest(long? loanRequestId)
        {
            return loanRequestId == null ? null : LoanRequestHashids.EncodeLong(loanRequestId.Value);
        }

        public static long? LoanRequest(string loanRequestUid)
        {
            return loanRequestUid == null ? null : (long?)LoanRequestHashids.DecodeLong(loanRequestUid)[0];
        }

        //-- User & LoanRequest Uid --
        public static string LoanRequestAndUser(long loanRequestId, long? userId)
        {
            return userId.HasValue ? 
                LoanRequestAndUserHashids.EncodeLong(loanRequestId, userId.Value) : 
                LoanRequestAndUserHashids.EncodeLong(loanRequestId);
        }

        public static void LoanRequestAndUser(string loanRequestUid, out long loanRequestId, out long? userId)
        {
            var arr = LoanRequestAndUserHashids.DecodeLong(loanRequestUid);
            loanRequestId = arr[0];
            userId = arr.Length == 1 ? null : (long?)arr[1];
        }
    }
}