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66391: expandedNodes (&loadingNode) is now retrieved/sent to the store

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at component initialisation/destruction so the state of the tree persists
& documentation
This commit is contained in:
Marie Verdonck
2019-11-26 17:16:21 +01:00
parent eaf0911e2e
commit 9bd1933548
8 changed files with 406 additions and 256 deletions
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24
src/app/community-list-page/community-list/community-list.component.ts
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@@ -1,14 +1,22 @@
import { Component, OnInit } from '@angular/core';
import { Component, OnDestroy, OnInit } from '@angular/core';
import { take } from 'rxjs/operators';
import { CommunityListService, FlatNode } from '../community-list-service';
import { CommunityListDatasource } from '../community-list-datasource';
import { FlatTreeControl } from '@angular/cdk/tree';
import { isEmpty } from '../../shared/empty.util';
/**
* A tree-structured list of nodes representing the communities, their subCommunities and collections.
* Initially only the page-restricted top communities are shown.
* Each node can be expanded to show its children and all children are also page-limited.
* More pages of a page-limited result can be shown by pressing a show more node/link.
* Which nodes were expanded is kept in the store, so this persists across pages.
*/
@Component({
selector: 'ds-community-list',
templateUrl: './community-list.component.html',
})
export class CommunityListComponent implements OnInit {
export class CommunityListComponent implements OnInit, OnDestroy {
private expandedNodes: FlatNode[] = [];
public loadingNode: FlatNode;
@@ -24,7 +32,17 @@ export class CommunityListComponent implements OnInit {
ngOnInit() {
this.dataSource = new CommunityListDatasource(this.communityListService);
this.dataSource.loadCommunities(null);
this.communityListService.getLoadingNodeFromStore().pipe(take(1)).subscribe((result) => {
this.loadingNode = result;
});
this.communityListService.getExpandedNodesFromStore().pipe(take(1)).subscribe((result) => {
this.expandedNodes = [...result];
this.dataSource.loadCommunities(this.expandedNodes);
});
}
ngOnDestroy(): void {
this.communityListService.saveCommunityListStateToStore(this.expandedNodes, this.loadingNode);
}
// whether or not this node has children (subcommunities or collections)