386 lines
12 KiB
TypeScript
386 lines
12 KiB
TypeScript
"use client";
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import { useEffect, useState } from "react";
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const PWA_INSTALL_MARKER_KEY = "dh-pwa-installed";
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type BeforeInstallPromptEvent = Event & {
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prompt: () => Promise<void>;
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userChoice: Promise<{
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outcome: "accepted" | "dismissed";
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platform: string;
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}>;
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};
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type NotificationState =
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| "checking"
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| "idle"
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| "pending"
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| "enabled"
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| "blocked"
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| "unsupported";
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function urlBase64ToUint8Array(base64String: string) {
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const padding = "=".repeat((4 - (base64String.length % 4)) % 4);
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const base64 = (base64String + padding).replace(/-/g, "+").replace(/_/g, "/");
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const rawData = window.atob(base64);
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const outputArray = new Uint8Array(rawData.length);
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for (let index = 0; index < rawData.length; index += 1) {
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outputArray[index] = rawData.charCodeAt(index);
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}
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return outputArray;
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}
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function isStandaloneDisplayMode() {
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const navigatorWithStandalone = navigator as Navigator & {
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standalone?: boolean;
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};
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return (
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window.matchMedia("(display-mode: standalone)").matches ||
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window.matchMedia("(display-mode: fullscreen)").matches ||
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window.matchMedia("(display-mode: minimal-ui)").matches ||
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Boolean(navigatorWithStandalone.standalone) ||
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document.referrer.startsWith("android-app://")
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);
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}
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function readInstalledMarker() {
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try {
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return window.localStorage.getItem(PWA_INSTALL_MARKER_KEY) === "1";
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} catch {
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return false;
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}
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}
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function writeInstalledMarker() {
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try {
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window.localStorage.setItem(PWA_INSTALL_MARKER_KEY, "1");
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} catch {
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return;
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}
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}
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export function PwaControls() {
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const vapidPublicKey = process.env.NEXT_PUBLIC_VAPID_PUBLIC_KEY || "";
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const [installPromptEvent, setInstallPromptEvent] =
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useState<BeforeInstallPromptEvent | null>(null);
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const [installing, setInstalling] = useState(false);
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const [isStandalone, setIsStandalone] = useState(false);
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const [hasInstalledHint, setHasInstalledHint] = useState(false);
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const [notificationState, setNotificationState] =
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useState<NotificationState>("checking");
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const [notice, setNotice] = useState<string | null>(null);
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useEffect(() => {
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let active = true;
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let delayedSyncTimer: number | null = null;
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function syncInstallState() {
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const standalone = isStandaloneDisplayMode();
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const installed = standalone || readInstalledMarker();
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if (standalone) {
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writeInstalledMarker();
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}
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if (!active) {
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return standalone;
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}
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setIsStandalone(standalone);
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setHasInstalledHint(installed);
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return standalone;
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}
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function handleBeforeInstallPrompt(event: Event) {
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event.preventDefault();
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if (!active) {
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return;
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}
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setInstallPromptEvent(event as BeforeInstallPromptEvent);
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}
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function handleAppInstalled() {
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writeInstalledMarker();
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if (!active) {
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return;
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}
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setHasInstalledHint(true);
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}
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function handleVisibilityChange() {
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if (!document.hidden) {
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syncInstallState();
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}
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}
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function handlePageShow() {
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syncInstallState();
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}
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function handleFocus() {
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syncInstallState();
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}
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async function syncExistingSubscription(subscription: PushSubscription) {
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await fetch("/api/push/subscribe", {
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method: "POST",
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headers: {
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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subscription: subscription.toJSON(),
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}),
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});
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}
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async function bootstrap() {
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syncInstallState();
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if (
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!("serviceWorker" in navigator) ||
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!("PushManager" in window) ||
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typeof Notification === "undefined"
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) {
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setNotificationState("unsupported");
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return;
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}
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try {
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await navigator.serviceWorker.register("/sw.js");
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const registration = await navigator.serviceWorker.ready;
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const existingSubscription = await registration.pushManager.getSubscription();
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if (!active) {
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return;
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}
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if (existingSubscription) {
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if (vapidPublicKey) {
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await syncExistingSubscription(existingSubscription);
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}
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setNotificationState("enabled");
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return;
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}
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setNotificationState(
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Notification.permission === "denied" ? "blocked" : "idle",
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);
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} catch {
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if (active) {
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setNotificationState("unsupported");
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}
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}
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}
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window.addEventListener("beforeinstallprompt", handleBeforeInstallPrompt);
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window.addEventListener("appinstalled", handleAppInstalled);
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window.addEventListener("pageshow", handlePageShow);
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window.addEventListener("focus", handleFocus);
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document.addEventListener("visibilitychange", handleVisibilityChange);
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void bootstrap();
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delayedSyncTimer = window.setTimeout(() => {
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syncInstallState();
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}, 350);
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return () => {
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active = false;
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window.removeEventListener("beforeinstallprompt", handleBeforeInstallPrompt);
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window.removeEventListener("appinstalled", handleAppInstalled);
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window.removeEventListener("pageshow", handlePageShow);
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window.removeEventListener("focus", handleFocus);
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document.removeEventListener("visibilitychange", handleVisibilityChange);
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if (delayedSyncTimer) {
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window.clearTimeout(delayedSyncTimer);
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}
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};
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}, [vapidPublicKey]);
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async function enableNotifications() {
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if (!vapidPublicKey) {
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setNotice("当前还没有配置推送服务，先将应用安装到桌面即可。\n");
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return;
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}
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setNotificationState("pending");
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setNotice(null);
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try {
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const permission = await Notification.requestPermission();
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if (permission !== "granted") {
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setNotificationState(permission === "denied" ? "blocked" : "idle");
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setNotice(
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permission === "denied"
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? "浏览器已经拒绝消息提醒，请在系统设置里重新打开通知权限。\n"
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: "这次没有打开通知权限，稍后仍可再次开启。\n",
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);
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return;
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}
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const registration = await navigator.serviceWorker.ready;
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let subscription = await registration.pushManager.getSubscription();
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if (!subscription) {
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subscription = await registration.pushManager.subscribe({
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userVisibleOnly: true,
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applicationServerKey: urlBase64ToUint8Array(vapidPublicKey),
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});
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}
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await fetch("/api/push/subscribe", {
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method: "POST",
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headers: {
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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subscription: subscription.toJSON(),
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}),
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});
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setNotificationState("enabled");
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setNotice("已开启消息提醒，长辈的新留言会直接推送到您的设备。\n");
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} catch {
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setNotificationState("idle");
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setNotice("打开消息提醒失败，请稍后再试。\n");
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}
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}
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async function disableNotifications() {
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try {
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const registration = await navigator.serviceWorker.ready;
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const subscription = await registration.pushManager.getSubscription();
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if (subscription) {
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await fetch("/api/push/unsubscribe", {
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method: "POST",
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headers: {
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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endpoint: subscription.endpoint,
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}),
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});
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await subscription.unsubscribe();
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}
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setNotificationState("idle");
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setNotice("这台设备的消息提醒已关闭。\n");
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} catch {
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setNotice("关闭消息提醒失败，请稍后再试。\n");
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}
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}
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async function installApp() {
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if (!installPromptEvent) {
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setNotice("如果浏览器没有弹出安装按钮，可以从菜单里选择“安装应用”或“添加到主屏幕”。\n");
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return;
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}
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setInstalling(true);
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setNotice(null);
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try {
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await installPromptEvent.prompt();
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const choice = await installPromptEvent.userChoice;
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if (choice.outcome === "accepted") {
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setInstallPromptEvent(null);
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setHasInstalledHint(true);
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setNotice("安装提示已经确认，完成后就能像应用一样直接打开。\n");
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} else {
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setNotice("这次先关闭了安装提示，之后仍可从浏览器菜单安装。\n");
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}
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} finally {
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setInstalling(false);
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}
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}
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return (
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<section className="rounded-[28px] border border-white/80 bg-white/88 p-5 shadow-[0_22px_55px_rgba(53,84,141,0.12)]">
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<p className="text-sm font-medium tracking-[0.18em] text-[var(--copper)] uppercase">
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快捷设置
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</p>
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<h2 className="mt-2 font-[family-name:var(--font-display)] text-2xl text-[var(--ink)]">
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安装到桌面，随时收到长辈的消息
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</h2>
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<p className="mt-3 text-sm leading-7 text-[var(--muted)]">
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安装后打开更快，开启提醒后，长辈每次留言都能立刻收到通知。
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</p>
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<div className="mt-4 flex flex-wrap gap-3 text-sm text-[var(--muted)]">
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<span className="rounded-full border border-[var(--line)] bg-[var(--paper-soft)] px-4 py-2">
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{isStandalone ? "当前正以桌面应用方式运行" : "当前正以浏览器方式运行"}
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</span>
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<span className="rounded-full border border-[var(--line)] bg-[var(--paper-soft)] px-4 py-2">
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{hasInstalledHint ? "这台设备已有主屏幕安装记录" : "暂未检测到主屏幕安装记录"}
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</span>
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<span className="rounded-full border border-[var(--line)] bg-[var(--paper-soft)] px-4 py-2">
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{notificationState === "enabled"
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? "消息提醒已开启"
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: notificationState === "blocked"
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? "通知权限已被拒绝"
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: "消息提醒未开启"}
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</span>
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</div>
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<div className="mt-5 flex flex-wrap gap-3">
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<button
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type="button"
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onClick={() => {
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void installApp();
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}}
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disabled={installing || isStandalone}
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className="inline-flex h-12 items-center justify-center rounded-full bg-[var(--ink)] px-5 text-sm font-semibold text-white transition hover:bg-[var(--ink-soft)] disabled:cursor-not-allowed disabled:opacity-60"
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>
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{isStandalone
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? "已从桌面版打开"
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: installing
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? "正在呼起安装"
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: hasInstalledHint
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? "查看安装说明"
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: "安装到桌面"}
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</button>
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{notificationState === "enabled" ? (
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<button
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type="button"
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onClick={() => {
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void disableNotifications();
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}}
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className="inline-flex h-12 items-center justify-center rounded-full border border-[var(--line)] bg-white px-5 text-sm font-semibold text-[var(--ink)] transition hover:bg-[var(--paper-soft)]"
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>
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关闭消息提醒
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</button>
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) : (
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<button
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type="button"
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onClick={() => {
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void enableNotifications();
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}}
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disabled={notificationState === "pending" || notificationState === "unsupported"}
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className="inline-flex h-12 items-center justify-center rounded-full bg-[var(--olive)] px-5 text-sm font-semibold text-white transition hover:bg-[var(--olive-deep)] disabled:cursor-not-allowed disabled:opacity-60"
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>
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{notificationState === "pending" ? "正在开启提醒" : "打开消息提醒"}
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</button>
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)}
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</div>
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{notice ? (
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<p className="mt-4 whitespace-pre-line text-sm leading-7 text-[var(--muted)]">
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{notice}
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</p>
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) : null}
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</section>
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);
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} |