OnTopic-Editor-AspNetCore/OnTopic.Editor.AspNetCore.Attributes/HtmlAttribute/HtmlViewComponent.cs at master · OnTopicCMS/OnTopic-Editor-AspNetCore · GitHub

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/*==============================================================================================================================
| Author        Ignia, LLC
| Client        Ignia, LLC
| Project       Topics Library
\=============================================================================================================================*/

namespace OnTopic.Editor.AspNetCore.Attributes.HtmlAttribute {

  /*============================================================================================================================
  | CLASS: HTML (VIEW COMPONENT)
  \---------------------------------------------------------------------------------------------------------------------------*/
  /// <summary>
  ///   Delivers a view model for a HTML attribute type.
  /// </summary>
  public class HtmlViewComponent : ViewComponent {

    /*==========================================================================================================================
    | CONSTRUCTOR
    \-------------------------------------------------------------------------------------------------------------------------*/
    /// <summary>
    ///   Initializes a new instance of a <see cref="HtmlViewComponent"/> with necessary dependencies.
    /// </summary>
    public HtmlViewComponent() : base() { }

    /*==========================================================================================================================
    | METHOD: INVOKE
    \-------------------------------------------------------------------------------------------------------------------------*/
    /// <summary>
    ///   Assembles the view model for the <see cref="HtmlViewComponent"/>.
    /// </summary>
    public IViewComponentResult Invoke(
      EditingTopicViewModel currentTopic,
      HtmlAttributeDescriptorViewModel attribute,
      string htmlFieldPrefix
    ) {

      /*------------------------------------------------------------------------------------------------------------------------
      | Validate parameters
      \-----------------------------------------------------------------------------------------------------------------------*/
      Contract.Requires(currentTopic, nameof(currentTopic));
      Contract.Requires(attribute, nameof(attribute));

      /*------------------------------------------------------------------------------------------------------------------------
      | Set HTML prefix
      \-----------------------------------------------------------------------------------------------------------------------*/
      ViewData.TemplateInfo.HtmlFieldPrefix = htmlFieldPrefix;

      /*------------------------------------------------------------------------------------------------------------------------
      | Set configuration values
      \-----------------------------------------------------------------------------------------------------------------------*/
      if (attribute.Height is null || attribute.Height is 0 && attribute.Rows is not null) {
        attribute = attribute with {
          Height = attribute.Rows * 20
        };
      }

      /*------------------------------------------------------------------------------------------------------------------------
      | Establish view model
      \-----------------------------------------------------------------------------------------------------------------------*/
      var viewModel = new AttributeViewModel<HtmlAttributeDescriptorViewModel>(currentTopic, attribute);

      /*------------------------------------------------------------------------------------------------------------------------
      | Return view with view model
      \-----------------------------------------------------------------------------------------------------------------------*/
      return View(viewModel);

    }

  } // Class
} // Namespace