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import { Injectable } from '@angular/core'
import { NavigationCancel, NavigationEnd, Router } from '@angular/router'
import { ServerService } from '../server'
@Injectable()
export class RedirectService {
// Default route could change according to the instance configuration
static INIT_DEFAULT_ROUTE = '/videos/trending'
static INIT_DEFAULT_TRENDING_ALGORITHM = 'most-viewed'
private previousUrl: string
private currentUrl: string
private redirectingToHomepage = false
private defaultTrendingAlgorithm = RedirectService.INIT_DEFAULT_TRENDING_ALGORITHM
private defaultRoute = RedirectService.INIT_DEFAULT_ROUTE
constructor (
private router: Router,
private serverService: ServerService
) {
// The config is first loaded from the cache so try to get the default route
const tmpConfig = this.serverService.getTmpConfig()
if (tmpConfig?.instance?.defaultClientRoute) {
this.defaultRoute = tmpConfig.instance.defaultClientRoute
}
if (tmpConfig?.trending?.videos?.algorithms?.default) {
this.defaultTrendingAlgorithm = tmpConfig.trending.videos.algorithms.default
}
// Load default route
this.serverService.getConfig()
.subscribe(config => {
const defaultRouteConfig = config.instance.defaultClientRoute
const defaultTrendingConfig = config.trending.videos.algorithms.default
if (defaultRouteConfig) this.defaultRoute = defaultRouteConfig
if (defaultTrendingConfig) this.defaultTrendingAlgorithm = defaultTrendingConfig
})
// Track previous url
this.currentUrl = this.router.url
router.events.subscribe(event => {
if (event instanceof NavigationEnd || event instanceof NavigationCancel) {
this.previousUrl = this.currentUrl
this.currentUrl = event.url
}
})
}
getDefaultRoute () {
return this.defaultRoute
}
getDefaultTrendingAlgorithm () {
return this.defaultTrendingAlgorithm
}
redirectToPreviousRoute () {
const exceptions = [
'/verify-account',
'/reset-password'
]
if (this.previousUrl) {
const isException = exceptions.find(e => this.previousUrl.startsWith(e))
if (!isException) return this.router.navigateByUrl(this.previousUrl)
}
return this.redirectToHomepage()
}
redirectToHomepage (skipLocationChange = false) {
if (this.redirectingToHomepage) return
this.redirectingToHomepage = true
console.log('Redirecting to %s...', this.defaultRoute)
this.router.navigateByUrl(this.defaultRoute, { skipLocationChange })
.then(() => this.redirectingToHomepage = false)
.catch(() => {
this.redirectingToHomepage = false
console.error(
'Cannot navigate to %s, resetting default route to %s.',
this.defaultRoute,
RedirectService.INIT_DEFAULT_ROUTE
)
this.defaultRoute = RedirectService.INIT_DEFAULT_ROUTE
return this.router.navigateByUrl(this.defaultRoute, { skipLocationChange })
})
}
}
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