public static string GetImageUrlParameter()

in src/Foundation/SitecoreExtensions/code/Extensions/RenderingExtensions.cs [28:83]

41 lines of code
10 McCabe index (conditional complexity)


    public static string GetImageUrlParameter(this Rendering rendering, string parameterName, MediaUrlOptions options = null)
    {
      if (rendering == null)
      {
        throw new ArgumentNullException(nameof(rendering));
      }

      // Check if this rendering parameter exists
      // Also crude check to guess if this is actually XML.
      var parameters = rendering.Parameters[parameterName];
      if (string.IsNullOrEmpty(parameters) || !parameters.StartsWith("<"))
      {
        return string.Empty;
      }

      // Try and parse the parameters into XML
      var xml = XmlUtil.LoadXml(parameters);
      if (xml == null)
      {
        return string.Empty;
      }

      // Check if xml contains mediaid attribute
      var imageId = XmlUtil.GetAttribute("mediaid", xml);
      if (string.IsNullOrEmpty(imageId))
      {
        return string.Empty;
      }

      // Check if mediaid exists in database
      var imageItem = Context.Database.GetItem(imageId);
      if (imageItem == null)
      {
        return string.Empty;
      }

      // If no explicit options supplied, work out width and height from xml parameters
      if (options == null)
      {
        options = MediaUrlOptions.Empty;
        int width, height;

        if (int.TryParse(XmlUtil.GetAttribute("width", xml), out width))
        {
          options.Width = width;
        }

        if (int.TryParse(XmlUtil.GetAttribute("height", xml), out height))
        {
          options.Height = height;
        }
      }

      // Return hash protected URL.
      return HashingUtils.ProtectAssetUrl(MediaManager.GetMediaUrl(imageItem, options));
    }