WebAPI-DealerSelection/Source/DealerSelection.Common/Logging/HttpHeaderHelper.cs

using Microsoft.Extensions.Primitives;

namespace DealerSelection.Common.Logging;

public class HttpHeaderHelper
{
    public static int? ExtractInt(string key, List<KeyValuePair<string, StringValues>> headers)
    {
        int? res = null;
        string? resString = Extract(key, headers);
        if (resString == null)
        {
            if(int.TryParse(resString, out int resTemp))
                res = resTemp;
        }
        return res;
    }

    public static string? Extract(string key, List<KeyValuePair<string, StringValues>> headers)
    {
        string? res = null;
        KeyValuePair<string, StringValues> header = headers.FirstOrDefault(h=> h.Key == key);
        if (header.Value.Any())
            res = header.Value.FirstOrDefault();
        return res;
    }
}