WebSite.Module.Compound

Unit
Source
Symbols

Symbol	Description
amFlow	All child modules will be rendered into one web page and presented horizontally.
amList	All child modules will be rendered into one web page and presented vertically.
amOverview	A simple list with links to child modules is rendered.
amTabMenu	One child module will always be active and the links to all child modules will be rendered as a tab menu.
amTabPages	All child modules will be rendered into one web page and presented by paged component with a tab menu.
amTiles	Only links to child modules are rendered, and they are rendered as large tiles.
TAggregationMethod	The method used by `TCompoundWebSiteModule` to render itself.
TCompoundWebSiteChildRequestHandler
TCompoundWebSiteModule	`TWebSiteModule` that aggregates a list of child modules.
TCompoundWebSiteRequestHandler
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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
///////////////////////////////////////////////////////////////////////////
//                                                                       //
//  Copyright (c) 2015 by Charta Software B.V.                           //
//  All rights reserved                                                  //
//                                                                       //
//  Version:  1.7.0.83525                                                //
//  Web site: https://pascal.chartasoftware.com/                         //
//                                                                       //
//  This code and information are provided "as is" without warranty of   //
//  any kind. Dissemination of this information or reproduction of       //
//  this material is strictly forbidden unless prior written permission  //
//  is obtained from Charta Software B.V..                               //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

unit WebSite.Module.Compound;

interface

uses
  Authorization.Level,
  Boolean,
  Collection.Map,
  Html.Element,
  Html.Element.Block,
  Html.Element.Inline_,
  Http.Response,
  Http.Response.Html,
  StructuredDocument.Node,
  Text,
  Uri,
  Uri.Producer,
  WebSite.Menu.Item,
  WebSite.Module,
  WebSite.Module.Default,
  WebSite.Module.Initialization_,
  WebSite.Module.Interaction,
  WebSite.Module.Registration,
  WebSite.Request,
  WebSite.Request.Handler,
  WebSite.Request.Handler.Decorating,
  WebSite.Request.Handler.Default;

type
  TAggregationMethod = (amOverview, amTabMenu, amTabPages, amList, amFlow, amTiles);

  TCompoundWebSiteModule = class;

  TCompoundWebSiteRequestHandler = class(TDefaultWebSiteRequestHandler)
  private
    FCaption: TDocumentNode;

    procedure   SetCaption(const Value: TDocumentNode);

  public
    CompoundModule: TCompoundWebSiteModule deprecated; // TODO: We should move TCompoundWebSiteModule member functions to TCompoundWebSiteRequestHandler (descendants)
    UriProducer:    TUriProducer;
    RenderDocument: TBoolean;

    destructor  Destroy(); override;

    function    HandleRequest(): THttpResponse; override;
    function    GetTitle(): TDocumentNode; override;
    function    CreateMenu(UriProducer: TUriProducer): TMenuItem; override;
    function    GetChildHandler(const Segment: TText; ResourceType: TUriResourceType): TWebSiteRequestHandler; override;

    property    Caption: TDocumentNode read FCaption write SetCaption;
  end;

  TCompoundWebSiteChildRequestHandler = class(TDecoratingWebSiteRequestHandler)
  public
    CompoundModule: TCompoundWebSiteModule;
    ActiveModule:   TWebSiteModule;
    UriProducer:    TUriProducer;

    function    HandleRequest(): THttpResponse; override;
  end;

  TCompoundWebSiteModule = class(TDefaultWebSiteModule)
  private
    FCaption:            TDocumentNode;
    FAuthorizationLevel: TAuthorizationLevel;

    procedure   SetCaption(const Value: TDocumentNode);
    procedure   SetAuthorizationLevel(const Value: TAuthorizationLevel);
    
  protected
    function    HandleModuleRequestForDocument(Request: TWebSiteRequest; UriProducer: TUriProducer): THttpResponse; virtual;
    function    HandleModuleRequest(Request: TWebSiteRequest; Module: TWebSiteModule; UriProducer: TUriProducer): THttpResponse;

    function    HandleModuleNotFoundResponse(Request: TWebSiteRequest; ModuleName: TText): THttpResponse;
    function    CreateOverviewResponse(Request: TWebSiteRequest): THttpHtmlResponse;
    function    CreateTilesResponse(Request: TWebSiteRequest): THttpHtmlResponse; virtual;
    function    CreateAggregatedModulesResponse(Request: TWebSiteRequest): THttpResponse;

    function    HeaderLink(Target: TText; Caption: TText): THtmlSpan;
    function    RenderAggregatedModulesResponse(Request: TWebSiteRequest; ModuleResponses: TMap<TWebSiteModule, THttpHtmlResponse>): THttpHtmlResponse; virtual;

    function    RenderTabPanel(Request: TWebSiteRequest; ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>): THtmlDivision;
    function    RenderList(Request: TWebSiteRequest; ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>): THtmlDivision;
    function    RenderFlow(Request: TWebSiteRequest; ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>): THtmlDivision;
    function    RenderChildModule(Request: TWebSiteRequest; Name: TText; Title: TDocumentNode; Content: THtmlElement): THtmlDivision;

    function    RedirectToFirstChildModule(Request: TWebSiteRequest): THttpResponse;
    function    RenderWebSiteTabMenu(Request: TWebSiteRequest; ActiveModule: TWebSiteModule; UriProducer: TUriProducer): THtmlDivision;

    function    CreateCompoundRequestHandler(Request: TWebSiteRequest): TCompoundWebSiteRequestHandler; virtual;

    property    Caption: TDocumentNode read FCaption write SetCaption;

  public
    ChildModules:      TWebSiteModuleRegistration;
    AggregationMethod: TAggregationMethod;
    UseSubMenu:        TBoolean;
    ShowChildTitles:   TBoolean;
    IterateBackward:   TBoolean; // TODO: Why is this necessary?

    constructor Create(Name: TText; Caption: TDocumentNode); reintroduce; overload; virtual;
    constructor Create(Initialization_: TWebSiteModuleInitialization; Name: TText; Caption: TDocumentNode); reintroduce; overload; virtual;
    destructor  Destroy(); override;

    function    CreateRequestHandler(Request: TWebSiteRequest): TWebSiteRequestHandler; override;
    function    GetTitle(Request: TWebSiteRequest): TDocumentNode; override;
    function    GetMenu(Request: TWebSiteRequest; MenuUriProducer: TUriProducer): TMenuItem; override;

    procedure   RegisterInteraction(Request: TWebSiteRequest; Interaction: TWebSiteModuleInteraction; UriProducer: TUriProducer); override;

    function    GetMinimumAuthorizationLevel(Request: TWebSiteRequest): TAuthorizationLevel; override;

    property    AuthorizationLevel: TAuthorizationLevel read FAuthorizationLevel write SetAuthorizationLevel; // TODO: Is this necessary?
  end;

implementation

uses
  Authorization.Level.Union,
  Exception,
  Html,
  Html.Element.Block.List,
  Http.Status,
  Iterator,
  Language.TranslationMap.Constants.General,
  Language.Translator,
  Object_.Map.Hash,
  Object_.Reference.Counter,
  Planning.Task.Widget,
  StructuredDocument.Compiler.Text,
  WebSite.Page.Component.Tab.Menu,
  WebSite.Page.Component.Tab.Panel,
  WebSite.Response,
  WebSite.Widget;

{ TCompoundWebSiteModule }

constructor TCompoundWebSiteModule.Create(Name: TText; Caption: TDocumentNode);
begin
  Create(nil, Name, Caption);
end;

function TCompoundWebSiteModule.GetTitle(Request: TWebSiteRequest): TDocumentNode;
begin
  Result := Caption;
end;

function TCompoundWebSiteModule.GetMenu(Request: TWebSiteRequest; MenuUriProducer: TUriProducer): TMenuItem;
var
  MenuItem: TMenuItem;
  Iterator: TIterator<TWebSiteModule>;
begin
  Result := GetDefaultMenu(Request, MenuUriProducer);

  if UseSubMenu then
  begin
    MenuUriProducer.PushPath([GetPathElement(Request.HandlerPath)]);
    Iterator := ChildModules.CreateIterator();

    try
      while Iterator.IsValid() do
      begin
        MenuItem := Iterator.Current.GetMenu(Request, MenuUriProducer);

        if MenuItem <> nil then
          Result.ChildItems.Add(MenuItem);

        Iterator.GotoNext();
      end;
    finally
      Iterator.Free();
    end;

    MenuUriProducer.PopPath();
  end;
end;

function TCompoundWebSiteModule.GetMinimumAuthorizationLevel(Request: TWebSiteRequest): TAuthorizationLevel;
var
  CompoundLevel: TUnionAuthorizationLevel;
  Iterator:      TIterator<TWebSiteModule>;
begin
  if AuthorizationLevel <> nil then
    Result := AuthorizationLevel
  else
  begin
    CompoundLevel := TUnionAuthorizationLevel.Create();
    Iterator      := ChildModules.CreateIterator();

    try
      while Iterator.IsValid() do
      begin
        CompoundLevel.Levels.Add(Iterator.Current.GetMinimumAuthorizationLevel(Request));
        Iterator.GotoNext();
      end;
    finally
      Iterator.Free();
    end;

    Result := CompoundLevel;
  end;
end;

function TCompoundWebSiteModule.HandleModuleRequest(Request: TWebSiteRequest; Module: TWebSiteModule; UriProducer: TUriProducer): THttpResponse;
var
  Handler: TWebSiteRequestHandler;
begin
  Request.UriProducer.PushPath([Module.GetName()]);

  Handler := Module.CreateRequestHandler(Request);
  Request.HandlerPath.Push(Handler);

  Result := Handler.HandleRequest();
  Request.UriProducer.PopPath();

  if (AggregationMethod = amTabMenu) and (Result is THttpHtmlResponse) and ((Result as THttpHtmlResponse).ContentStatus = THtmlContentStatus.Inline_) then
    (Result as THttpHtmlResponse).WrapElement(RenderWebSiteTabMenu(Request, Module, UriProducer));
end;

function TCompoundWebSiteModule.HandleModuleRequestForDocument(Request: TWebSiteRequest; UriProducer: TUriProducer): THttpResponse;
var
  ModuleName: TText;
  Module:     TWebSiteModule;
begin
  ModuleName := Request.Path.RemoveFirst();
  Module     := ChildModules.FindWithName(ModuleName);

  if Module <> nil then
    Result := HandleModuleRequest(Request, Module, UriProducer)
  else
    Result := HandleModuleNotFoundResponse(Request, ModuleName);
end;

constructor TCompoundWebSiteModule.Create(Initialization_: TWebSiteModuleInitialization; Name: TText; Caption: TDocumentNode);
begin
  inherited Create(Name);

  ChildModules := TWebSiteModuleRegistration.Create();

  Self.Caption           := Caption;
  Self.UseSubMenu        := True;
  Self.ShowChildTitles   := True;
  Self.IterateBackward   := False;
  Self.AggregationMethod := amOverview;
end;

function TCompoundWebSiteModule.CreateAggregatedModulesResponse(Request: TWebSiteRequest): THttpResponse;
var
  ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>;
  Module:            TWebSiteModule;
  ModuleResponse:    THttpResponse;
  Iterator:          TIterator<TWebSiteModule>;
  Handler:           TWebSiteRequestHandler;
begin
  ModuleResponseMap := TObjectHashMap<TWebSiteModule, THttpHtmlResponse>.Create();
  ModuleResponseMap.ValueManager := TReferenceCounter<THttpHtmlResponse>.Create();

  Result := nil;

  if IterateBackward then
    Iterator := ChildModules.CreateBackwardIterator()
  else
    Iterator := ChildModules.CreateIterator();

  try
    while (Result = nil) and Iterator.IsValid do
    begin
      Module  := Iterator.Current;
      Handler := Module.CreateRequestHandler(Request);

      Request.HandlerPath.Push(Handler);
      Request.UriProducer.PushPath([Module.GetName()]);

      ModuleResponse := Handler.HandleRequest();

      if ModuleResponse is THttpHtmlResponse then
      begin
        ModuleResponse.AddReference();

        if ModuleResponse.StatusLine.Status = THttpStatus.SuccessfulOk then
          ModuleResponseMap[Module] := ModuleResponse as THttpHtmlResponse;

        ModuleResponse.ReleaseReference();
      end
      else
        Result := ModuleResponse;

      Request.HandlerPath. Pop();
      Request.UriProducer.PopPath();
      Iterator.GotoNext();
    end;
  finally
    Iterator.Free();
  end;

  if Result = nil then
    Result := RenderAggregatedModulesResponse(Request, ModuleResponseMap);

  ModuleResponseMap.Free();
end;

function TCompoundWebSiteModule.CreateCompoundRequestHandler(Request: TWebSiteRequest): TCompoundWebSiteRequestHandler;
begin
  Result := TCompoundWebSiteRequestHandler.Create(Request);
end;

function TCompoundWebSiteModule.CreateOverviewResponse(Request: TWebSiteRequest): THttpHtmlResponse;
var
  Content:                   THtmlDivision;
  Help:                      THtmlDivision;
  List:                      THtmlList;
  Translator:                TTranslator;
  Module:                    TWebSiteModule;
  Iterator:                  TIterator<TWebSiteModule>;
  MinimumAuthorizationLevel: TAuthorizationLevel;
begin
  Translator := Request.Translator;
  Content    := THtmlDivision.Create();
  Help       := RenderHelp(Request);

  if Help <> nil then
    Content.Contents.Add(Help);

  Content.Contents.Add(Heading(2, [Html.Text(Translator.Translate(tmContents))]));

  List := THtmlList.Create();
  Content.Contents.Add(List);

  Iterator := ChildModules.CreateIterator();

  try
    while Iterator.IsValid() do
    begin
      Module := Iterator.Current;
      
      MinimumAuthorizationLevel := Module.GetMinimumAuthorizationLevel(Request);
      MinimumAuthorizationLevel.AddReference();

      if MinimumAuthorizationLevel.IsMet(Request.Authorizer) then
        List.Items.Add(ListItem([
          TextLink(
            Request.UriProducer.RelativeUri([Module.GetName()], TUriResourceType.Directory),
            TDocumentToTextCompiler.RenderToText(Translator, Module.GetTitle(Request))
          )
        ]));

      MinimumAuthorizationLevel.ReleaseReference();
      Iterator.GotoNext();
    end;
  finally
    Iterator.Free();
  end;

  Result := THttpHtmlResponse.Create();
  Result.Element := Content;
end;

function TCompoundWebSiteModule.CreateRequestHandler(Request: TWebSiteRequest): TWebSiteRequestHandler;
var
  Handler: TCompoundWebSiteRequestHandler;
begin
  Handler := CreateCompoundRequestHandler(Request);
  Handler.CompoundModule := Self;
  Handler.Caption        := Caption;
  Handler.UriProducer    := Request.UriProducer.CloneRelativeProducer();
  Handler.RenderDocument := not Request.Path.IsEmpty();

  Result := CreateChildHandlers(Request, Handler);
end;

function TCompoundWebSiteModule.CreateTilesResponse(Request: TWebSiteRequest): THttpHtmlResponse;
var
  Tiles:                     THtmlDivision;
  Tile:                      THtmlDivision;
  Translator:                TTranslator;
  Module:                    TWebSiteModule;
  Iterator:                  TIterator<TWebSiteModule>;
  MenuItem:                  TMenuItem;
  MinimumAuthorizationLevel: TAuthorizationLevel;
  Widget:                    TWebSiteWidget;
  ModuleUri:                 TUri;
  BodyElement:               THtmlDivision;
  HtmlElement:               THtmlElement;
begin
  Translator := Request.Translator;

  Tiles    := DivisionWithClass('Tiles', []);
  Iterator := ChildModules.CreateIterator();

  try
    while Iterator.IsValid do
    begin
      Module   := Iterator.Current;
      MenuItem := Module.GetMenu(Request, Request.UriProducer);

      MinimumAuthorizationLevel := Module.GetMinimumAuthorizationLevel(Request);
      MinimumAuthorizationLevel.AddReference();

      if MinimumAuthorizationLevel.IsMet(Request.Authorizer) and (MenuItem <> nil) then
      begin
        ModuleUri := Request.UriProducer.RelativeUri([ Module.GetName() ], TUriResourceType.Directory);

        Tile        := DivisionWithClass('Tile', [DivisionWithClass('Header', [TextLink(ModuleUri, TDocumentToTextCompiler.RenderToText(Translator, Module.GetTitle(Request)))])]);
        BodyElement := DivisionWithClass('Body', []);

        for Widget in Request.Interaction.Widgets do
        begin
          if Widget is TTasksWidget then
          begin
            HtmlElement := Widget.Render(TWidgetPreferences.Tiles, ModuleUri);

            if HtmlElement <> nil then
              BodyElement.Contents.Add(HtmlElement);
          end;
        end;

        if BodyElement.Contents.Count = 0 then
        begin
          Tile.Contents.Add(Link(ModuleUri, [BodyElement]));
          Tile.Classes.Add('Empty');
        end
        else
          Tile.Contents.Add(BodyElement);

        Tiles.Contents.Add(Tile);
      end;

      MinimumAuthorizationLevel.ReleaseReference();
      MenuItem.Free();
      Iterator.GotoNext();
    end;
  finally
    Iterator.Free();
  end;

  Result := THttpHtmlResponse.Create();
  Result.Element := Tiles;
end;

destructor TCompoundWebSiteModule.Destroy();
begin
  ChildModules.Free();

  AuthorizationLevel.ReleaseReference();;
  Caption.ReleaseReference();

  inherited Destroy();
end;

function TCompoundWebSiteModule.RedirectToFirstChildModule(Request: TWebSiteRequest): THttpResponse;
var
  Iterator:                  TIterator<TWebSiteModule>;
  Module:                    TWebSiteModule;  
  MinimumAuthorizationLevel: TAuthorizationLevel;
begin
  Result   := nil;
  Iterator := ChildModules.CreateIterator();

  while Iterator.IsValid and (Result = nil) do
  begin
    Module := Iterator.Current;
    
    MinimumAuthorizationLevel := Module.GetMinimumAuthorizationLevel(Request);
    MinimumAuthorizationLevel.AddReference();

    if MinimumAuthorizationLevel.IsMet(Request.Authorizer) then
      Result := HandleRedirectResponse(Request, Request.UriProducer.RelativeUri([Module.GetName()], TUriResourceType.Directory));

    MinimumAuthorizationLevel.ReleaseReference();
    Iterator.GotoNext();
  end;

  Iterator.Free();
end;

procedure TCompoundWebSiteModule.RegisterInteraction(Request: TWebSiteRequest; Interaction: TWebSiteModuleInteraction; UriProducer: TUriProducer);
var
  Iterator: TIterator<TWebSiteModule>;
begin
  Iterator := ChildModules.CreateIterator();

  try
    while Iterator.IsValid() do
    begin
      UriProducer.PushPath([Iterator.Current.GetName()]);

      Iterator.Current.RegisterInteraction(Request, Interaction, UriProducer);
      Iterator.GotoNext();

      UriProducer.PopPath();
    end;
  finally
    Iterator.Free();
  end;
end;

function TCompoundWebSiteModule.RenderAggregatedModulesResponse(Request: TWebSiteRequest; ModuleResponses: TMap<TWebSiteModule, THttpHtmlResponse>): THttpHtmlResponse;
var
  Help: THtmlDivision;
begin
  Result := THttpHtmlResponse.Create();

  case AggregationMethod of
    amTabPages:
      Result.Element := RenderTabPanel(Request, ModuleResponses);
    amList:
      Result.Element := RenderList(Request, ModuleResponses);
    amFlow:
      Result.Element := RenderFlow(Request, ModuleResponses);
    else
      raise EException.Create('Unknown aggregation method');
  end;

  Help := RenderHelp(Request);

  if Help <> nil then
    Result.WrapElement(Help);
end;

function TCompoundWebSiteModule.RenderChildModule(Request: TWebSiteRequest; Name: TText; Title: TDocumentNode; Content: THtmlElement): THtmlDivision;
begin
  Result := DivisionWithID(Name, []);

  if ShowChildTitles then
    Result.Contents.Add(Heading(2, [Html.Text(TDocumentToTextCompiler.RenderToText(Request.Translator, Title))]));

  Result.Contents.Add(Content);
end;

function TCompoundWebSiteModule.RenderFlow(Request: TWebSiteRequest; ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>): THtmlDivision;
var
  Iterator:       TIterator<TWebSiteModule>;
  ModuleResponse: THttpHtmlResponse;
  Section:        THtmlDivision;
  IsFirstSection: TBoolean;
begin
  Result := THtmlDivision.Create();
  Result.Classes.Add('flowModule');

  Iterator       := ChildModules.CreateIterator();
  IsFirstSection := True;

  try
    while Iterator.IsValid do
    begin
      ModuleResponse := ModuleResponseMap[Iterator.Current];

      if ModuleResponse <> nil then
      begin
        Section := THtmlDivision.Create();
        Section.Contents.Add(RenderChildModule(Request, Iterator.Current.GetName(), Iterator.Current.GetTitle(Request), ModuleResponse.Element));
        Section.Style.Float := 'left';
        Section.Style.Width := '45%';

        if IsFirstSection then
          IsFirstSection := False
        else
          Section.Style.MarginLeft := '12px';

        Result.Contents.Add(Section);
      end;

      Iterator.GotoNext();
    end;
  finally
    Iterator.Free();
  end;
end;

function TCompoundWebSiteModule.RenderList(Request: TWebSiteRequest; ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>): THtmlDivision;
var
  Iterator:                  TIterator<TWebSiteModule>;
  Module:                    TWebSiteModule;
  ModuleResponse:            THttpHtmlResponse;
  MinimumAuthorizationLevel: TAuthorizationLevel;
begin
  Result   := THtmlDivision.Create();
  Iterator := ChildModules.CreateIterator();

  try
    while Iterator.IsValid() do
    begin
      Module := Iterator.Current;
      
      MinimumAuthorizationLevel := Module.GetMinimumAuthorizationLevel(Request);
      MinimumAuthorizationLevel.AddReference();

      if MinimumAuthorizationLevel.IsMet(Request.Authorizer) then
      begin
        ModuleResponse := ModuleResponseMap[Module];

        if ModuleResponse <> nil then
          Result.Contents.Add(RenderChildModule(Request, Module.GetName(), Module.GetTitle(Request), ModuleResponse.Element));
      end;

      MinimumAuthorizationLevel.ReleaseReference();
      Iterator.GotoNext();
    end;
  finally
    Iterator.Free();
  end;
end;

function TCompoundWebSiteModule.RenderTabPanel(Request: TWebSiteRequest; ModuleResponseMap: TMap<TWebSiteModule, THttpHtmlResponse>): THtmlDivision;
var
  TabPanel:       TWebSiteTabPanel;
  TabPage:        TWebSiteTabPage;
  Iterator:       TIterator<TWebSiteModule>;
  Module:         TWebSiteModule;
  ModuleResponse: THttpHtmlResponse;
begin
  Iterator := ChildModules.CreateIterator();
  Result   := THtmlDivision.Create();
  TabPanel := TWebSiteTabPanel.Create('tabPanel');

  try
    while Iterator.IsValid() do
    begin
      Module         := Iterator.Current;
      ModuleResponse := ModuleResponseMap[Module];

      if (ModuleResponse <> nil) and not ((ModuleResponse.StatusLine.Status = THttpStatus.ClientErrorUnauthorized) or (ModuleResponse.StatusLine.Status = THttpStatus.ClientErrorNotFound)) then
      begin
        TabPage := TWebSiteTabPage.Create(Module.GetName(), Module.GetTitle(Request));
        TabPage.Contents.Add(ModuleResponse.Element);

        TabPanel.Pages.Add(TabPage);
      end;

      Iterator.GotoNext();
    end;
  finally
    Iterator.Free();
  end;

  Result.Contents.Add(TabPanel.Render(Request));
  TabPanel.Free();
end;

function TCompoundWebSiteModule.RenderWebSiteTabMenu(Request: TWebSiteRequest; ActiveModule: TWebSiteModule; UriProducer: TUriProducer): THtmlDivision;
var
  Iterator:                  TIterator<TWebSiteModule>;
  Help:                      THtmlDivision;
  Tab:                       TWebSiteTab;
  TabMenu:                   TWebSiteTabMenu;
  Module:                    TWebSiteModule;
  Menu:                      TMenuItem;
  MinimumAuthorizationLevel: TAuthorizationLevel;
begin
  Iterator := ChildModules.CreateIterator();
  Result   := THtmlDivision.Create();
  Help     := RenderHelp(Request);

  TabMenu := TWebSiteTabMenu.Create();
  TabMenu.Name := GetName() + '-tabs';

  if Help <> nil then
    Result.Contents.Add(Help);

  while Iterator.IsValid() do
  begin
    Module := Iterator.Current;
    Menu   := Module.GetMenu(Request, UriProducer);

    MinimumAuthorizationLevel := Module.GetMinimumAuthorizationLevel(Request);
    MinimumAuthorizationLevel.AddReference();

    if MinimumAuthorizationLevel.IsMet(Request.Authorizer) and (Menu <> nil) then
    begin
      Tab := TWebSiteTab.Create();
      Tab.Identifier := Module.GetName();
      Tab.Caption    := Module.GetTitle(Request);
      Tab.Uri        := UriProducer.RelativeUri([Module.GetName()], TUriResourceType.Directory);

      TabMenu.Tabs.Add(Tab);

      if ActiveModule.GetName() = Module.GetName() then
        TabMenu.SelectedTab := Tab;
    end;

    Menu.Free();
    MinimumAuthorizationLevel.ReleaseReference();
    Iterator.GotoNext();
  end;

  if TabMenu.Tabs.Count > 1 then
    Result.Contents.Add(TabMenu.Render(Request));

  TabMenu.Free();
  Iterator.Free();
end;

procedure TCompoundWebSiteModule.SetAuthorizationLevel(const Value: TAuthorizationLevel);
begin
  if Value <> AuthorizationLevel then
  begin
    Value.AddReference();
    AuthorizationLevel.ReleaseReference();

    FAuthorizationLevel := Value;
  end;
end;

procedure TCompoundWebSiteModule.SetCaption(const Value: TDocumentNode);
begin
  if Value <> Caption then
  begin
    Value.AddReference();
    Caption.ReleaseReference();

    FCaption := Value;
  end;
end;

function TCompoundWebSiteModule.HandleModuleNotFoundResponse(Request: TWebSiteRequest; ModuleName: TText): THttpResponse;
begin
  Result := HandleNotFoundResponse(Request, Request.UriProducer.RelativeUri([ModuleName], TUriResourceType.Directory));
end;

function TCompoundWebSiteModule.HeaderLink(Target: TText; Caption: TText): THtmlSpan;
begin
  Result := THtmlSpan.Create;
  Result.Contents.Add(Html.Text('['));
  Result.Contents.Add(TextLink(TUri.New('#' + Target), Caption));
  Result.Contents.Add(Html.Text(']'));
end;

{ TCompoundWebSiteRequestHandler }

function TCompoundWebSiteRequestHandler.CreateMenu(UriProducer: TUriProducer): TMenuItem;
begin
  Result := CompoundModule.GetMenu(Request, UriProducer);
end;

function TCompoundWebSiteRequestHandler.GetChildHandler(const Segment: TText; ResourceType: TUriResourceType): TWebSiteRequestHandler;
//var
//  Handler: TCompoundWebSiteChildRequestHandler;
//  Module:  TWebSiteModule;
begin
//  Module := CompoundModule.ChildModules.FindWithName(Segment);
//
//  if Module <> nil then
//  begin
//    Handler := TCompoundWebSiteChildRequestHandler.Create(Request, Module.CreateRequestHandler(Request));
//    Handler.CompoundModule := CompoundModule;
//    Handler.UriProducer    := UriProducer;
//    Handler.ActiveModule   := Module;
//
//    Result := Handler;
//  end
//  else
//    Result := TNotFoundWebSiteRequestHandler.Create(Request);
  Result := nil;
end;

destructor TCompoundWebSiteRequestHandler.Destroy();
begin
  Caption.ReleaseReference();
  UriProducer.Free();

  inherited Destroy();
end;

function TCompoundWebSiteRequestHandler.GetTitle(): TDocumentNode;
begin
  Result := Caption;
end;

function TCompoundWebSiteRequestHandler.HandleRequest(): THttpResponse;
begin
  if RenderDocument then
    Result := CompoundModule.HandleModuleRequestForDocument(Request, UriProducer)
  else
  begin
    case CompoundModule.AggregationMethod of
      amOverview:
        Result := CompoundModule.CreateOverviewResponse(Request);
      amTiles:
        Result := CompoundModule.CreateTilesResponse(Request);
      amList, amFlow, amTabPages:
        Result := CompoundModule.CreateAggregatedModulesResponse(Request);
      amTabMenu:
        Result := CompoundModule.RedirectToFirstChildModule(Request);
      else
        raise EException.Create('Unknown aggregation method');
    end;
  end;
end;

procedure TCompoundWebSiteRequestHandler.SetCaption(const Value: TDocumentNode);
begin
  if Value <> Caption then
  begin
    Value.AddReference();
    Caption.ReleaseReference();

    FCaption := Value;
  end;
end;

{ TCompoundWebSiteChildRequestHandler }

function TCompoundWebSiteChildRequestHandler.HandleRequest(): THttpResponse;
begin
  Result := inherited HandleRequest();

  if (CompoundModule.AggregationMethod = amTabMenu) and (Result is THttpHtmlResponse) and ((Result as THttpHtmlResponse).ContentStatus = THtmlContentStatus.Inline_) then
    (Result as THttpHtmlResponse).WrapElement(CompoundModule.RenderWebSiteTabMenu(Request, ActiveModule, UriProducer));
end;

end.