Spotify.NET/SpotifyAPI.Web/Models/TuneableTrack.cs

using System.Collections.Generic;
using System.Globalization;
using System.Reflection;

namespace SpotifyAPI.Web.Models
{
  public class TuneableTrack
  {
    [String("acousticness")]
    public float? Acousticness { get; set; }

    [String("danceability")]
    public float? Danceability { get; set; }

    [String("duration_ms")]
    public int? DurationMs { get; set; }

    [String("energy")]
    public float? Energy { get; set; }

    [String("instrumentalness")]
    public float? Instrumentalness { get; set; }

    [String("key")]
    public int? Key { get; set; }

    [String("liveness")]
    public float? Liveness { get; set; }

    [String("loudness")]
    public float? Loudness { get; set; }

    [String("mode")]
    public int? Mode { get; set; }

    [String("popularity")]
    public int? Popularity { get; set; }

    [String("speechiness")]
    public float? Speechiness { get; set; }

    [String("tempo")]
    public float? Tempo { get; set; }

    [String("time_signature")]
    public int? TimeSignature { get; set; }

    [String("valence")]
    public float? Valence { get; set; }

    public string BuildUrlParams(string prefix)
    {
      List<string> urlParams = new List<string>();
      foreach (PropertyInfo info in GetType().GetProperties())
      {
        object value = info.GetValue(this);
        string name = info.GetCustomAttribute<StringAttribute>()?.Text;
        if (name == null || value == null)
          continue;
        urlParams.Add(value is float valueAsFloat ?
          $"{prefix}_{name}={valueAsFloat.ToString(CultureInfo.InvariantCulture)}" :
          $"{prefix}_{name}={value}");
      }
      if (urlParams.Count > 0)
        return "&" + string.Join("&", urlParams);
      return "";
    }
  }
}