firefish/packages/backend/src/services/push-notification.ts

import push from "web-push";
import config from "@/config/index.js";
import { SwSubscriptions } from "@/models/index.js";
import { fetchMeta } from "@/misc/fetch-meta.js";
import type { Packed } from "@/misc/schema.js";
import { getNoteSummary } from "@/misc/get-note-summary.js";

// Defined also packages/sw/types.ts#L14-L21
type pushNotificationsTypes = {
	notification: Packed<"Notification">;
	unreadMessagingMessage: Packed<"MessagingMessage">;
	readNotifications: { notificationIds: string[] };
	readAllNotifications: undefined;
	readAllMessagingMessages: undefined;
	readAllMessagingMessagesOfARoom: { userId: string } | { groupId: string };
};

// プッシュメッセージサーバーには文字数制限があるため、内容を削減します
function truncateNotification(notification: Packed<"Notification">): any {
	if (notification.note) {
		return {
			...notification,
			note: {
				...notification.note,
				// textをgetNoteSummaryしたものに置き換える
				text: getNoteSummary(
					notification.type === "renote"
						? (notification.note.renote as Packed<"Note">)
						: notification.note,
				),

				cw: undefined,
				reply: undefined,
				renote: undefined,
				user: undefined as any, // 通知を受け取ったユーザーである場合が多いのでこれも捨てる
			},
		};
	}

	return notification;
}

export async function pushNotification<T extends keyof pushNotificationsTypes>(
	userId: string,
	type: T,
	body: pushNotificationsTypes[T],
) {
	const meta = await fetchMeta();

	if (
		!meta.enableServiceWorker ||
		meta.swPublicKey == null ||
		meta.swPrivateKey == null
	)
		return;

	// アプリケーションの連絡先と、サーバーサイドの鍵ペアの情報を登録
	push.setVapidDetails(config.url, meta.swPublicKey, meta.swPrivateKey);

	// Fetch
	const subscriptions = await SwSubscriptions.findBy({
		userId: userId,
	});

	for (const subscription of subscriptions) {
		if (
			[
				"readNotifications",
				"readAllNotifications",
				"readAllMessagingMessages",
				"readAllMessagingMessagesOfARoom",
			].includes(type) &&
			!subscription.sendReadMessage
		)
			continue;

		const pushSubscription = {
			endpoint: subscription.endpoint,
			keys: {
				auth: subscription.auth,
				p256dh: subscription.publickey,
			},
		};

		push
			.sendNotification(
				pushSubscription,
				JSON.stringify({
					type,
					body:
						type === "notification"
							? truncateNotification(body as Packed<"Notification">)
							: body,
					userId,
					dateTime: Date.now(),
				}),
				{
					proxy: config.proxy,
				},
			)
			.catch((err: any) => {
				//swLogger.info(err.statusCode);
				//swLogger.info(err.headers);
				//swLogger.info(err.body);

				if (err.statusCode === 410) {
					SwSubscriptions.delete({
						userId: userId,
						endpoint: subscription.endpoint,
						auth: subscription.auth,
						publickey: subscription.publickey,
					});
				}
			});
	}
}