ContentType.cs

using System;
using System.Collections.Generic;

namespace S22.Imap
{
  /// <summary>
  ///   Possible values for the "Type" property of the Bodypart class.
  ///   For a detailed description of MIME Media Types refer to
  ///   RFC 2046.
  /// </summary>
  public enum ContentType
  {
    /// <summary>
    ///   The "text" media type is intended for sending material which
    ///   is principally textual in form.
    /// </summary>
    Text,

    /// <summary>
    ///   A media type of "image" indicates that the body contains an image.
    ///   The subtype names the specific image format.
    /// </summary>
    Image,

    /// <summary>
    ///   A media type of "audio" indicates that the body contains audio
    ///   data.
    /// </summary>
    Audio,

    /// <summary>
    ///   A media type of "video" indicates that the body contains a
    ///   time-varying-picture image, possibly with color and coordinated sound.
    /// </summary>
    Video,

    /// <summary>
    ///   The "application" media type is to be used for discrete data which do
    ///   not fit in any of the other categories, and particularly for data to
    ///   be processed by some type of application program.
    /// </summary>
    Application,

    /// <summary>
    ///   The "message" content type allows messages to contain other messages
    ///   or pointers to other messages.
    /// </summary>
    Message,

    /// <summary>
    ///   The media type value is unknown or could not be determined.
    /// </summary>
    Other
  }

  internal static class ContentTypeMap
  {
    public static ContentType fromString(string contentType)
    {
      var Map =
        new Dictionary<string, ContentType>(StringComparer.OrdinalIgnoreCase)
        {
          {"Text", ContentType.Text},
          {"Image", ContentType.Image},
          {"Audio", ContentType.Audio},
          {"Video", ContentType.Video},
          {"Application", ContentType.Application},
          {"Message", ContentType.Message},
          {"Other", ContentType.Other}
        };
      try
      {
        return Map[contentType];
      }
      catch
      {
        return ContentType.Other;
      }
    }
  }
}