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import { VersionCheckService } from './version-check.service';
import { DestroyRef, inject, Injectable, signal } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { NavigationError, Router } from '@angular/router';
import { LoggerService, NotificationService, WINDOW } from '@drevo-web/core';
import { VersionInfo } from '@drevo-web/shared';
import { filter, Subscription, timer } from 'rxjs';
const REMIND_AFTER_MS = 60 * 60 * 1000;
@Injectable({ providedIn: 'root' })
export class AppUpdateService {
private readonly window = inject(WINDOW);
private readonly router = inject(Router);
private readonly logger = inject(LoggerService).withContext('AppUpdateService');
private readonly versionCheck = inject(VersionCheckService);
private readonly notification = inject(NotificationService);
private readonly destroyRef = inject(DestroyRef);
private readonly _chunkLoadFailed = signal(false);
readonly chunkLoadFailed = this._chunkLoadFailed.asReadonly();
private readonly _newVersionAvailable = signal<VersionInfo | undefined>(undefined);
readonly newVersionAvailable = this._newVersionAvailable.asReadonly();
private lastDismissedAt: number | undefined;
private reminderTimer?: Subscription;
constructor() {
// Covers router navigations: in zoneless mode imperative router.navigate()
// rejections may bypass the global ErrorHandler, so we listen to NavigationError
// directly. ChunkErrorHandler complements this for non-router dynamic imports.
this.router.events
.pipe(
takeUntilDestroyed(),
filter((e): e is NavigationError => e instanceof NavigationError),
)
.subscribe(event => {
if (isChunkLoadError(event.error)) {
this.notifyChunkLoadFailure(event.error, { url: event.url, source: 'router' });
}
});
this.versionCheck.newVersionAvailable$
.pipe(takeUntilDestroyed())
.subscribe(info => {
this._newVersionAvailable.set(info);
this.showUpdateSnackbar(info);
});
}
startVersionCheck(): void {
this.versionCheck.startPolling();
}
notifyChunkLoadFailure(
error: unknown,
context: { readonly url: string; readonly source: 'router' | 'error-handler' },
): void {
if (this._chunkLoadFailed()) {
return;
}
this._chunkLoadFailed.set(true);
this.logger.error('Chunk load failure — reload prompt shown', { error, ...context });
}
reload(reason: 'chunk-load-failure' | 'version-update' = 'chunk-load-failure'): void {
this.logger.info('User clicked reload', { reason });
this.window?.location.reload();
}
dismiss(): void {
if (!this._chunkLoadFailed()) {
return;
}
this._chunkLoadFailed.set(false);
this.logger.info('User dismissed reload prompt; will reappear on next chunk load failure');
}
private showUpdateSnackbar(info: VersionInfo): void {
if (this.lastDismissedAt && Date.now() - this.lastDismissedAt < REMIND_AFTER_MS) {
this.scheduleReminder(info);
return;
}
this.logger.info('Showing update notification', { version: info.version });
this.notification.showPersistent({
message: `Доступна новая версия ${info.version}`,
actionLabel: 'Обновить',
onAction: () => this.reload('version-update'),
onDismiss: () => {
this.lastDismissedAt = Date.now();
this.scheduleReminder(info);
},
});
}
private scheduleReminder(info: VersionInfo): void {
this.reminderTimer?.unsubscribe();
const elapsed = Date.now() - (this.lastDismissedAt ?? 0);
const remaining = Math.max(0, REMIND_AFTER_MS - elapsed);
this.reminderTimer = timer(remaining)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe(() => {
this.lastDismissedAt = undefined;
this.showUpdateSnackbar(info);
});
}
}
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