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import { Component, OnDestroy, OnInit } from '@angular/core'
import { ActivatedRoute, Router } from '@angular/router'
import { AuthService, RedirectService } from '@app/core'
import { NotificationsService } from 'angular2-notifications'
import { forkJoin, Subscription } from 'rxjs'
import { SearchService } from '@app/search/search.service'
import { ComponentPagination } from '@app/shared/rest/component-pagination.model'
import { I18n } from '@ngx-translate/i18n-polyfill'
import { MetaService } from '@ngx-meta/core'
import { AdvancedSearch } from '@app/search/advanced-search.model'
import { VideoChannel } from '@app/shared/video-channel/video-channel.model'
import { immutableAssign } from '@app/shared/misc/utils'
import { Video } from '@app/shared/video/video.model'
@Component({
selector: 'my-search',
styleUrls: [ './search.component.scss' ],
templateUrl: './search.component.html'
})
export class SearchComponent implements OnInit, OnDestroy {
results: (Video | VideoChannel)[] = []
pagination: ComponentPagination = {
currentPage: 1,
itemsPerPage: 10, // Only for videos, use another variable for channels
totalItems: null
}
advancedSearch: AdvancedSearch = new AdvancedSearch()
isSearchFilterCollapsed = true
currentSearch: string
private subActivatedRoute: Subscription
private isInitialLoad = false // set to false to show the search filters on first arrival
private firstSearch = true
private channelsPerPage = 2
constructor (
private i18n: I18n,
private route: ActivatedRoute,
private router: Router,
private metaService: MetaService,
private redirectService: RedirectService,
private notificationsService: NotificationsService,
private searchService: SearchService,
private authService: AuthService
) { }
ngOnInit () {
this.subActivatedRoute = this.route.queryParams.subscribe(
queryParams => {
const querySearch = queryParams['search']
// New empty search
if (this.currentSearch && !querySearch) return this.redirectService.redirectToHomepage()
// Search updated, reset filters
if (this.currentSearch !== querySearch) {
this.resetPagination()
this.advancedSearch.reset()
this.currentSearch = querySearch
this.updateTitle()
}
this.advancedSearch = new AdvancedSearch(queryParams)
// Don't hide filters if we have some of them AND the user just came on the webpage
this.isSearchFilterCollapsed = this.isInitialLoad === false || !this.advancedSearch.containsValues()
this.isInitialLoad = false
this.search()
},
err => this.notificationsService.error('Error', err.text)
)
}
ngOnDestroy () {
if (this.subActivatedRoute) this.subActivatedRoute.unsubscribe()
}
isVideoChannel (d: VideoChannel | Video): d is VideoChannel {
return d instanceof VideoChannel
}
isVideo (v: VideoChannel | Video): v is Video {
return v instanceof Video
}
isUserLoggedIn () {
return this.authService.isLoggedIn()
}
search () {
forkJoin([
this.searchService.searchVideos(this.currentSearch, this.pagination, this.advancedSearch),
this.searchService.searchVideoChannels(this.currentSearch, immutableAssign(this.pagination, { itemsPerPage: this.channelsPerPage }))
])
.subscribe(
([ videosResult, videoChannelsResult ]) => {
this.results = this.results
.concat(videoChannelsResult.data)
.concat(videosResult.videos)
this.pagination.totalItems = videosResult.totalVideos + videoChannelsResult.total
// Focus on channels if there are no enough videos
if (this.firstSearch === true && videosResult.videos.length < this.pagination.itemsPerPage) {
this.resetPagination()
this.firstSearch = false
this.channelsPerPage = 10
this.search()
}
this.firstSearch = false
},
error => {
this.notificationsService.error(this.i18n('Error'), error.message)
}
)
}
onNearOfBottom () {
// Last page
if (this.pagination.totalItems <= (this.pagination.currentPage * this.pagination.itemsPerPage)) return
this.pagination.currentPage += 1
this.search()
}
onFiltered () {
this.resetPagination()
this.updateUrlFromAdvancedSearch()
}
numberOfFilters () {
return this.advancedSearch.size()
}
private resetPagination () {
this.pagination.currentPage = 1
this.pagination.totalItems = null
this.channelsPerPage = 2
this.results = []
}
private updateTitle () {
this.metaService.setTitle(this.i18n('Search') + ' ' + this.currentSearch)
}
private updateUrlFromAdvancedSearch () {
const search = (this.currentSearch && this.currentSearch !== '') ? this.currentSearch : undefined
this.router.navigate([], {
relativeTo: this.route,
queryParams: Object.assign({}, this.advancedSearch.toUrlObject(), { search })
})
}
}
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