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import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core'
import { ActivatedRoute, Router } from '@angular/router'
import { Subscription } from 'rxjs/Subscription'
import { BehaviorSubject } from 'rxjs/BehaviorSubject'
import { NotificationsService } from 'angular2-notifications'
import {
SortField,
Video,
VideoService,
VideoPagination
} from '../shared'
import { AuthService, AuthUser } from '../../core'
import { Search, SearchField, SearchService } from '../../shared'
import { } from '../../shared'
@Component({
selector: 'my-videos-list',
styleUrls: [ './video-list.component.scss' ],
templateUrl: './video-list.component.html'
})
export class VideoListComponent implements OnInit, OnDestroy {
loading: BehaviorSubject<boolean> = new BehaviorSubject(false)
pagination: VideoPagination = {
currentPage: 1,
itemsPerPage: 25,
totalItems: null
}
sort: SortField
user: AuthUser = null
videos: Video[] = []
private search: Search
private subActivatedRoute: Subscription
private subSearch: Subscription
constructor (
private notificationsService: NotificationsService,
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 = []
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 => this.notificationsService.error('Error', error.text)
)
}
isThereNoVideo () {
return !this.loading.getValue() && this.videos.length === 0
}
onPageChanged (event: { page: number }) {
// Be sure the current page is set
this.pagination.currentPage = event.page
this.navigateToNewParams()
}
onSort (sort: SortField) {
this.sort = sort
this.navigateToNewParams()
}
private buildRouteParams () {
// There is always a sort and a current page
const params = {
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: { [ key: string ]: any }) {
if (routeParams['search'] !== undefined) {
this.search = {
value: routeParams['search'],
field: routeParams['field'] as SearchField
}
} else {
this.search = {
value: '',
field: 'name'
}
}
this.sort = routeParams['sort'] as SortField || '-createdAt'
if (routeParams['page'] !== undefined) {
this.pagination.currentPage = parseInt(routeParams['page'], 10)
} else {
this.pagination.currentPage = 1
}
}
private navigateToNewParams () {
const routeParams = this.buildRouteParams()
this.router.navigate([ '/videos/list', routeParams ])
}
}
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