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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | 3x 3x 3x 3x 3x 3x 16x 16x 16x 16x 16x 16x 13x 13x 13x 9x 3x 4x 7x 7x 1x 7x 3x 2x 7x | import { inject, Injectable } from '@angular/core';
import { MatSnackBar } from '@angular/material/snack-bar';
export type ToastKind = 'error' | 'info' | 'success';
const errorDurationMs = 6000;
const messageDurationMs = 3000;
const throttleTimeMs = 2000;
export interface PersistentNotificationConfig {
readonly message: string;
readonly actionLabel: string;
readonly onAction: () => void;
readonly onDismiss?: () => void;
readonly kind?: ToastKind;
}
@Injectable({ providedIn: 'root' })
export class NotificationService {
private readonly snackBar = inject(MatSnackBar);
private lastKey: string | undefined = undefined;
private lastAt = 0;
private show(message: string, kind: ToastKind = 'info'): void {
const key = `${kind}:${message}`;
const now = Date.now();
// Simple dedupe/throttle: ignore same message within throttleTimeMs
if (this.lastKey === key && now - this.lastAt < throttleTimeMs) return;
this.lastKey = key;
this.lastAt = now;
this.snackBar.open(message, 'OK', {
duration: kind === 'error' ? errorDurationMs : messageDurationMs,
horizontalPosition: 'end',
verticalPosition: 'top',
panelClass: [`toast-${kind}`],
politeness: kind === 'error' ? 'assertive' : 'polite',
});
}
error(message: string): void {
this.show(message, 'error');
}
success(message: string): void {
this.show(message, 'success');
}
info(message: string): void {
this.show(message, 'info');
}
showPersistent(config: PersistentNotificationConfig): () => void {
const ref = this.snackBar.open(config.message, config.actionLabel, {
duration: 0,
horizontalPosition: 'center',
verticalPosition: 'bottom',
panelClass: [`toast-${config.kind ?? 'info'}`, 'toast-persistent'],
politeness: 'polite',
});
ref.onAction().subscribe(() => {
config.onAction();
});
ref.afterDismissed().subscribe(({ dismissedByAction }) => {
if (!dismissedByAction) {
config.onDismiss?.();
}
});
return () => ref.dismiss();
}
}
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