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import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core';
import { AsyncPipe } from '@angular/common';
import { ActivatedRoute, Router, ROUTER_DIRECTIVES } from '@angular/router';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { PAGINATION_DIRECTIVES } from 'ng2-bootstrap/components/pagination';
import {
LoaderComponent,
SortField,
Video,
VideoService
} from '../shared';
import { AuthService, AuthUser, RestPagination, Search, SearchField } from '../../shared';
import { VideoMiniatureComponent } from './video-miniature.component';
import { VideoSortComponent } from './video-sort.component';
import { SearchService } from '../../shared';
@Component({
selector: 'my-videos-list',
styles: [ require('./video-list.component.scss') ],
pipes: [ AsyncPipe ],
template: require('./video-list.component.html'),
directives: [ LoaderComponent, PAGINATION_DIRECTIVES, ROUTER_DIRECTIVES, VideoMiniatureComponent, VideoSortComponent ]
})
export class VideoListComponent implements OnInit, OnDestroy {
loading: BehaviorSubject<boolean> = new BehaviorSubject(false);
pagination: RestPagination = {
currentPage: 1,
itemsPerPage: 9,
totalItems: null
};
sort: SortField;
user: AuthUser = null;
videos: Video[] = [];
private search: Search;
private subActivatedRoute: any;
private subSearch: any;
constructor(
private authService: AuthService,
private changeDetector: ChangeDetectorRef,
private router: Router,
private route: ActivatedRoute,
private videoService: VideoService,
private searchService: SearchService
) {}
ngOnInit() {
if (this.authService.isLoggedIn()) {
this.user = AuthUser.load();
}
// Subscribe to route changes
this.subActivatedRoute = this.route.params.subscribe(routeParams => {
this.loadRouteParams(routeParams);
// Update the search service component
this.searchService.updateSearch.next(this.search);
this.getVideos();
});
// Subscribe to search changes
this.subSearch = this.searchService.searchUpdated.subscribe(search => {
this.search = search;
// Reset pagination
this.pagination.currentPage = 1;
this.navigateToNewParams();
});
}
ngOnDestroy() {
this.subActivatedRoute.unsubscribe();
this.subSearch.unsubscribe();
}
getVideos() {
this.loading.next(true);
this.videos = [];
this.changeDetector.detectChanges();
let observable = null;
if (this.search.value) {
observable = this.videoService.searchVideos(this.search, this.pagination, this.sort);
} else {
observable = this.videoService.getVideos(this.pagination, this.sort);
}
observable.subscribe(
({ videos, totalVideos }) => {
this.videos = videos;
this.pagination.totalItems = totalVideos;
this.loading.next(false);
},
error => alert(error.text)
);
}
isThereNoVideo() {
return !this.loading.getValue() && this.videos.length === 0;
}
onPageChanged(event: any) {
// Be sure the current page is set
this.pagination.currentPage = event.page;
this.navigateToNewParams();
}
onRemoved(video: Video) {
this.getVideos();
}
onSort(sort: SortField) {
this.sort = sort;
this.navigateToNewParams();
}
private buildRouteParams() {
// There is always a sort and a current page
const params: any = {
sort: this.sort,
page: this.pagination.currentPage
};
// Maybe there is a search
if (this.search.value) {
params.field = this.search.field;
params.search = this.search.value;
}
return params;
}
private loadRouteParams(routeParams) {
if (routeParams['search'] !== undefined) {
this.search = {
value: routeParams['search'],
field: <SearchField>routeParams['field']
};
} else {
this.search = {
value: '',
field: 'name'
};
}
this.sort = <SortField>routeParams['sort'] || '-createdDate';
if (routeParams['page'] !== undefined) {
this.pagination.currentPage = parseInt(routeParams['page']);
} else {
this.pagination.currentPage = 1;
}
this.changeDetector.detectChanges();
}
private navigateToNewParams() {
const routeParams = this.buildRouteParams();
this.router.navigate(['/videos/list', routeParams]);
}
}
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