agenda hierarchy tree

client/src/app/site/agenda/agenda-routing.module.ts

@@ -3,13 +3,15 @@ import { Routes, RouterModule } from '@angular/router';
 
 import { AgendaImportListComponent } from './components/agenda-import-list/agenda-import-list.component';
 import { AgendaListComponent } from './components/agenda-list/agenda-list.component';
-import { TopicDetailComponent } from './components/topic-detail/topic-detail.component';
+import { AgendaSortComponent } from './components/agenda-sort/agenda-sort.component';
 import { SpeakerListComponent } from './components/speaker-list/speaker-list.component';
+import { TopicDetailComponent } from './components/topic-detail/topic-detail.component';
 
 const routes: Routes = [
     { path: '', component: AgendaListComponent },
     { path: 'import', component: AgendaImportListComponent },
     { path: 'topics/new', component: TopicDetailComponent },
+    { path: 'sort-agenda', component: AgendaSortComponent },
     { path: 'topics/:id', component: TopicDetailComponent },
     { path: ':id/speakers', component: SpeakerListComponent }
 ];

client/src/app/site/agenda/agenda.module.ts

@@ -7,6 +7,7 @@ import { ItemInfoDialogComponent } from './components/item-info-dialog/item-info
 import { AgendaRoutingModule } from './agenda-routing.module';
 import { SharedModule } from '../../shared/shared.module';
 import { TopicDetailComponent } from './components/topic-detail/topic-detail.component';
+import { AgendaSortComponent } from './components/agenda-sort/agenda-sort.component';
 
 /**
  * AppModule for the agenda and it's children.
@@ -14,6 +15,12 @@ import { TopicDetailComponent } from './components/topic-detail/topic-detail.com
 @NgModule({
     imports: [CommonModule, AgendaRoutingModule, SharedModule],
     entryComponents: [ItemInfoDialogComponent],
-    declarations: [AgendaListComponent, TopicDetailComponent, ItemInfoDialogComponent, AgendaImportListComponent]
+    declarations: [
+        AgendaListComponent,
+        TopicDetailComponent,
+        ItemInfoDialogComponent,
+        AgendaImportListComponent,
+        AgendaSortComponent
+    ]
 })
 export class AgendaModule {}

client/src/app/site/agenda/components/agenda-list/agenda-list.component.html

@@ -11,7 +11,6 @@
         <button mat-icon-button (click)="toggleMultiSelect()"><mat-icon>arrow_back</mat-icon></button>
         <span>{{ selectedRows.length }}&nbsp;</span><span translate>selected</span>
     </div>
-
 </os-head-bar>
 <mat-drawer-container class="on-transition-fade">
     <os-sort-filter-bar [filterService]="filterService" (searchFieldChange)="searchFilter($event)"></os-sort-filter-bar>
@@ -30,8 +29,10 @@
             <mat-header-cell *matHeaderCellDef mat-sort-header>Topic</mat-header-cell>
             <!-- <mat-cell (click)="onTitleColumn(item)" *matCellDef="let item"> -->
             <mat-cell (click)="selectItem(item, $event)" *matCellDef="let item">
+                <div [ngStyle]="{'margin-left': item.agendaListLevel * 25 + 'px' }">
                     <span *ngIf="item.closed"> <mat-icon class="done-check">check</mat-icon> </span>
-                <span> {{ item.getListTitle() }} </span>
+                    <span class="table-view-list-title">{{ item.getListTitle() }}</span>
+                </div>
             </mat-cell>
         </ng-container>
 
@@ -61,7 +62,10 @@
             <mat-header-cell *matHeaderCellDef mat-sort-header>Speakers</mat-header-cell>
             <mat-cell *matCellDef="let item">
                 <button mat-icon-button (click)="onSpeakerIcon(item)">
-                    <mat-icon [matBadge]="item.waitingSpeakerAmount > 0 ? item.waitingSpeakerAmount : null" matBadgeColor="accent">
+                    <mat-icon
+                        [matBadge]="item.waitingSpeakerAmount > 0 ? item.waitingSpeakerAmount : null"
+                        matBadgeColor="accent"
+                    >
                         mic
                     </mat-icon>
                 </button>
@@ -102,8 +106,12 @@
                 <mat-icon>format_list_numbered</mat-icon>
                 <span translate>Numbering</span>
             </button>
+            <button mat-menu-item routerLink="sort-agenda">
+                <mat-icon>sort</mat-icon>
+                <span translate>Sort</span>
+            </button>
         </div>
-        <button mat-menu-item (click)="csvExportItemList();">
+        <button mat-menu-item (click)="csvExportItemList()">
             <mat-icon>archive</mat-icon>
             <span translate>Export as CSV</span>
         </button>
@@ -179,7 +187,10 @@
 
         <!-- List of speakers for mobile -->
         <button mat-menu-item (click)="onSpeakerIcon(item)" *ngIf="vp.isMobile">
-            <mat-icon [matBadge]="item.waitingSpeakerAmount > 0 ? item.waitingSpeakerAmount : null" matBadgeColor="accent">
+            <mat-icon
+                [matBadge]="item.waitingSpeakerAmount > 0 ? item.waitingSpeakerAmount : null"
+                matBadgeColor="accent"
+            >
                 mic
             </mat-icon>
             <span translate>List of speakers</span>

client/src/app/site/agenda/components/agenda-list/agenda-list.component.ts

@@ -81,8 +81,9 @@ export class AgendaListComponent extends ListViewBaseComponent<ViewItem> impleme
     public ngOnInit(): void {
         super.setTitle('Agenda');
         this.initTable();
-        this.filterService.filter().subscribe(newAgendaItem => {
+        this.filterService.filter().subscribe(newAgendaItems => {
-            this.dataSource.data = newAgendaItem;
+            newAgendaItems.sort((a, b) => a.agendaListWeight - b.agendaListWeight);
+            this.dataSource.data = newAgendaItems;
             this.checkSelection();
         });
         this.config

client/src/app/site/agenda/components/agenda-sort/agenda-sort.component.html

@@ -0,0 +1,23 @@
+<os-head-bar [nav]="false">
+    <!-- Title -->
+    <div class="title-slot"><h2 translate>Sort agenda</h2></div>
+</os-head-bar>
+
+<mat-card>
+    <div>
+        <span translate>
+            Drag and drop items to change the order of the agenda. Your modification will be saved immediately.
+        </span>
+    </div>
+    <button mat-button (click)="expandCollapseAll(true)">{{ 'Expand all' | translate }}</button>
+    <button mat-button (click)="expandCollapseAll(false)">{{ 'Collapse all' | translate }}</button>
+    <os-sorting-tree
+        #sorter
+        (sort)="sort($event)"
+        parentIdKey="parent_id"
+        weightKey="weight"
+        [modelsObservable]="itemsObservable"
+        [expandCollapseAll]="expandCollapse"
+    >
+    </os-sorting-tree>
+</mat-card>

client/src/app/site/agenda/components/agenda-sort/agenda-sort.component.spec.ts

@@ -0,0 +1,26 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { AgendaSortComponent } from './agenda-sort.component';
+import { E2EImportsModule } from 'e2e-imports.module';
+
+describe('AgendaSortComponent', () => {
+    let component: AgendaSortComponent;
+    let fixture: ComponentFixture<AgendaSortComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            declarations: [AgendaSortComponent]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(AgendaSortComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/site/agenda/components/agenda-sort/agenda-sort.component.ts

@@ -0,0 +1,66 @@
+import { Component, EventEmitter } from '@angular/core';
+import { Title } from '@angular/platform-browser';
+import { MatSnackBar } from '@angular/material';
+
+import { TranslateService } from '@ngx-translate/core';
+import { Observable } from 'rxjs';
+
+import { AgendaRepositoryService } from '../../services/agenda-repository.service';
+import { BaseViewComponent } from '../../../base/base-view';
+import { OSTreeSortEvent } from 'app/shared/components/sorting-tree/sorting-tree.component';
+import { ViewItem } from '../../models/view-item';
+
+/**
+ * Sort view for the agenda.
+ */
+@Component({
+    selector: 'os-agenda-sort',
+    templateUrl: './agenda-sort.component.html'
+})
+export class AgendaSortComponent extends BaseViewComponent {
+    /**
+     * All agendaItems sorted by their virtual weight {@link ViewItem.agendaListWeight}
+     */
+    public itemsObservable: Observable<ViewItem[]>;
+
+    /**
+     * Emits true for expand and false for collapse. Informs the sorter component about this actions.
+     */
+    public readonly expandCollapse: EventEmitter<boolean> = new EventEmitter<boolean>();
+
+    /**
+     * Updates the incoming/changing agenda items.
+     * @param title
+     * @param translate
+     * @param matSnackBar
+     * @param agendaRepo
+     */
+    public constructor(
+        title: Title,
+        translate: TranslateService,
+        matSnackBar: MatSnackBar,
+        private agendaRepo: AgendaRepositoryService
+    ) {
+        super(title, translate, matSnackBar);
+        this.itemsObservable = this.agendaRepo.getViewModelListObservable();
+    }
+
+    /**
+     * Handler for the sort event. The data to change is given to the repo, sending it to the server.
+     *
+     * @param data The event data. The representation fits the servers requirements, so it can directly
+     * be send to the server via the repository.
+     */
+    public sort(data: OSTreeSortEvent<ViewItem>): void {
+        this.agendaRepo.sortItems(data).then(null, this.raiseError);
+    }
+
+    /**
+     * Fires the expandCollapse event emitter.
+     *
+     * @param expand True, if the tree should be expanded. Otherwise collapsed
+     */
+    public expandCollapseAll(expand: boolean): void {
+        this.expandCollapse.emit(expand);
+    }
+}

client/src/app/site/agenda/models/view-item.ts

@@ -7,6 +7,19 @@ export class ViewItem extends BaseViewModel {
     private _item: Item;
     private _contentObject: AgendaBaseModel;
 
+    /**
+     * virtual weight defined by the order in the agenda tree, representing a shortcut to sorting by
+     * weight, parent_id and the parents' weight(s)
+     * TODO will be accurate if the viewMotion is observed via {@link getViewModelListObservable}, else, it will be undefined
+     */
+    public agendaListWeight: number;
+
+    /**
+     * The amount of parents in the agenda list tree.
+     * TODO will be accurate if the viewMotion is observed via {@link getViewModelListObservable}, else, it will be undefined
+     */
+    public agendaListLevel: number;
+
     public get item(): Item {
         return this._item;
     }
@@ -67,6 +80,21 @@ export class ViewItem extends BaseViewModel {
         return this.item ? this.item.speakers : [];
     }
 
+    /**
+     * @returns the weight the server assigns to that item. Mostly useful for sorting within
+     * it's own hierarchy level (items sharing a parent)
+     */
+    public get weight(): number {
+        return this.item ? this.item.weight : null;
+    }
+
+    /**
+     * @returns the parent's id of that item (0 if no parent is set).
+     */
+    public get parent_id(): number {
+        return this.item ? this.item.parent_id : null;
+    }
+
     public constructor(item: Item, contentObject: AgendaBaseModel) {
         super();
         this._item = item;

client/src/app/site/agenda/services/agenda-repository.service.ts

@@ -1,21 +1,23 @@
 import { Injectable } from '@angular/core';
-import { map } from 'rxjs/operators';
+import { tap, map } from 'rxjs/operators';
 import { Observable } from 'rxjs';
 
 import { BaseRepository } from '../../base/base-repository';
-import { DataStoreService } from '../../../core/services/data-store.service';
-import { Item } from '../../../shared/models/agenda/item';
-import { ViewItem } from '../models/view-item';
 import { AgendaBaseModel } from '../../../shared/models/base/agenda-base-model';
 import { BaseModel } from '../../../shared/models/base/base-model';
-import { Identifiable } from '../../../shared/models/base/identifiable';
 import { CollectionStringModelMapperService } from '../../../core/services/collectionStringModelMapper.service';
-import { ViewSpeaker } from '../models/view-speaker';
-import { Speaker } from 'app/shared/models/agenda/speaker';
-import { User } from 'app/shared/models/users/user';
-import { HttpService } from 'app/core/services/http.service';
 import { ConfigService } from 'app/core/services/config.service';
 import { DataSendService } from 'app/core/services/data-send.service';
+import { DataStoreService } from '../../../core/services/data-store.service';
+import { HttpService } from 'app/core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
+import { Item } from '../../../shared/models/agenda/item';
+import { OSTreeSortEvent } from 'app/shared/components/sorting-tree/sorting-tree.component';
+import { Speaker } from 'app/shared/models/agenda/speaker';
+import { User } from 'app/shared/models/users/user';
+import { ViewItem } from '../models/view-item';
+import { ViewSpeaker } from '../models/view-speaker';
+import { TreeService } from 'app/core/services/tree.service';
 
 /**
  * Repository service for users
@@ -34,13 +36,15 @@ export class AgendaRepositoryService extends BaseRepository<ViewItem, Item> {
      * @param mapperService OpenSlides mapping service for collection strings
      * @param config Read config variables
      * @param dataSend send models to the server
+     * @param treeService sort the data according to weight and parents
      */
     public constructor(
         protected DS: DataStoreService,
         private httpService: HttpService,
         mapperService: CollectionStringModelMapperService,
         private config: ConfigService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private treeService: TreeService
     ) {
         super(DS, mapperService, Item);
     }
@@ -229,4 +233,37 @@ export class AgendaRepositoryService extends BaseRepository<ViewItem, Item> {
     public getDefaultAgendaVisibility(): Observable<number> {
         return this.config.get('agenda_new_items_default_visibility').pipe(map(key => +key));
     }
+
+    /**
+     * Sends the changed nodes to the server.
+     *
+     * @param data The reordered data from the sorting
+     */
+    public async sortItems(data: OSTreeSortEvent<ViewItem>): Promise<void> {
+        const url = '/rest/agenda/item/sort/';
+        await this.httpService.post(url, data);
+    }
+
+    /**
+     * Add custom hook into the observables. The ViewItems get a virtual agendaListWeight (a sequential number)
+     * for the agenda topic order, and a virtual level for the hierarchy in the agenda list tree. Both values can be used
+     * for sorting and ordering instead of dealing with the sort parent id and weight.
+     *
+     * @override
+     */
+    public getViewModelListObservable(): Observable<ViewItem[]> {
+        return super.getViewModelListObservable().pipe(
+            tap(items => {
+                const iterator = this.treeService.traverseItems(items, 'weight', 'parent_id');
+                let m: IteratorResult<ViewItem>;
+                let virtualWeightCounter = 0;
+                while (!(m = iterator.next()).done) {
+                    m.value.agendaListWeight = virtualWeightCounter++;
+                    m.value.agendaListLevel = m.value.parent_id
+                        ? this.getViewModel(m.value.parent_id).agendaListLevel + 1
+                        : 0;
+                }
+            })
+        );
+    }
 }

client/src/styles.scss

@@ -551,3 +551,8 @@ button.mat-menu-item.selected {
         max-width: 50%;
     }
 }
+
+.table-view-list-title {
+    font-weight: 500;
+    font-size: 16px;
+}