OnTopic-Editor-AspNetCore/OnTopic.Editor.AspNetCore.Attributes/IncomingRelationshipAttribute/IncomingRelationshipViewComponent.cs at master · OnTopicCMS/OnTopic-Editor-AspNetCore · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
/*==============================================================================================================================
| Author        Ignia, LLC
| Client        Ignia, LLC
| Project       Topics Library
\=============================================================================================================================*/
using OnTopic.Repositories;

namespace OnTopic.Editor.AspNetCore.Attributes.IncomingRelationshipAttribute {

  /*============================================================================================================================
  | CLASS: INCOMING RELATIONSHIP (VIEW COMPONENT)
  \---------------------------------------------------------------------------------------------------------------------------*/
  /// <summary>
  ///   Delivers a view model for an incoming relationship attribute type.
  /// </summary>
  public class IncomingRelationshipViewComponent : ViewComponent {

    /*==========================================================================================================================
    | PRIVATE VARIABLES
    \-------------------------------------------------------------------------------------------------------------------------*/
    private readonly            ITopicRepository                _topicRepository;

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

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

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

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

      /*------------------------------------------------------------------------------------------------------------------------
      | Establish view model
      \-----------------------------------------------------------------------------------------------------------------------*/
      var model = new IncomingRelationshipAttributeViewModel(currentTopic, attribute);

      /*------------------------------------------------------------------------------------------------------------------------
      | Set incoming relationships
      >-------------------------------------------------------------------------------------------------------------------------
      | ### NOTE JJC20200929: This would be a lot cleaner using the ITopicMappingService. But that would introduce an additional
      | dependency on the StandardEditorComposer, which would be a breaking change. We can reevaluate this in the future if
      | other view components would benefit from this.
      \-----------------------------------------------------------------------------------------------------------------------*/
      var topic                 = _topicRepository.Load(currentTopic.UniqueKey);

      Contract.Assume(topic, $"The target topic with the unique key '{currentTopic.UniqueKey}' could not be found.");

      foreach(var relatedTopic in topic.IncomingRelationships.GetValues(attribute.RelationshipKey?? attribute.Key)) {

        if (!String.IsNullOrWhiteSpace(attribute.AttributeKey)) {
          var attributeValue = relatedTopic.Attributes.GetValue(attribute.AttributeKey, "");
          if (attribute.AttributeKey.Equals("ContentType", StringComparison.OrdinalIgnoreCase)) {
            attributeValue = relatedTopic.ContentType;
          }
          if (!attributeValue.Equals(attribute.AttributeValue, StringComparison.OrdinalIgnoreCase)) {
            continue;
          }
        }
        var relatedViewModel    = new CoreTopicViewModel {
          Key                   = relatedTopic.Key,
          ContentType           = relatedTopic.ContentType,
          UniqueKey             = relatedTopic.GetUniqueKey(),
          WebPath               = relatedTopic.GetWebPath(),
          Title                 = relatedTopic.Title
        };
        model.RelatedTopics.Add(relatedViewModel);
      }

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

    }

  } // Class
} // Namespace