feat: add platform notification core

This commit is contained in:
Codex
2026-05-26 18:01:39 +03:00
parent c1ac8b1a10
commit e605e95920
17 changed files with 1865 additions and 5 deletions
+623
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import express from "express";
import { randomUUID, timingSafeEqual } from "node:crypto";
import { createServer } from "node:http";
import { Pool } from "pg";
const config = readConfig();
const pool = new Pool({ connectionString: config.databaseUrl, max: config.databasePoolSize });
const app = express();
const httpServer = createServer(app);
const streamClients = new Set();
app.disable("x-powered-by");
app.use(express.json({ limit: "1mb" }));
app.get("/healthz", asyncRoute(async (_req, res) => {
await pool.query("select 1");
res.json({
ok: true,
service: "nodedc-notification-core",
database: "ready",
internalApiConfigured: Boolean(config.internalAccessToken),
});
}));
app.post("/internal/notifications/events", requireInternalApi, asyncRoute(async (req, res) => {
const command = sanitizeEventCommand(req.body);
const result = await createNotificationEvent(command);
res.status(result.created ? 201 : 200).json(result);
}));
app.get("/api/notifications", requireInternalApi, asyncRoute(async (req, res) => {
const subject = getRequestSubject(req);
const surface = sanitizeSurface(req.query.surface || "hub");
const limit = sanitizeLimit(req.query.limit);
const unreadOnly = req.query.unreadOnly === "1" || req.query.unreadOnly === "true";
const deliveries = await listDeliveries({ subject, surface, limit, unreadOnly });
res.json({ ok: true, surface, deliveries });
}));
app.post("/api/notifications/:deliveryId/read", requireInternalApi, asyncRoute(async (req, res) => {
const subject = getRequestSubject(req);
const deliveryId = sanitizeUuid(req.params.deliveryId, "deliveryId");
const delivery = await markDeliveryRead({ subject, deliveryId });
if (!delivery) {
res.status(404).json({ ok: false, error: "notification_delivery_not_found" });
return;
}
broadcastDeliveryUpdate("notification.delivery.read", delivery);
res.json({ ok: true, delivery });
}));
app.post("/api/notifications/read-all", requireInternalApi, asyncRoute(async (req, res) => {
const subject = getRequestSubject(req);
const surface = sanitizeSurface(req.query.surface || req.body?.surface || "hub");
const result = await markAllDeliveriesRead({ subject, surface });
broadcastSubjectUpdate("notification.deliveries.read-all", { subject, surface, count: result.count });
res.json({ ok: true, surface, count: result.count });
}));
app.get("/api/notifications/stream", requireInternalApi, (req, res) => {
const subject = getRequestSubject(req);
const surface = sanitizeSurface(req.query.surface || "hub");
const client = { id: randomUUID(), res, subject, surface };
res.setHeader("Content-Type", "text/event-stream");
res.setHeader("Cache-Control", "no-cache, no-transform");
res.setHeader("Connection", "keep-alive");
res.setHeader("X-Accel-Buffering", "no");
res.flushHeaders?.();
writeSse(res, "notification.ready", { ok: true, surface });
const keepAlive = setInterval(() => {
res.write(": keep-alive\n\n");
}, 30000);
streamClients.add(client);
req.on("close", () => {
clearInterval(keepAlive);
streamClients.delete(client);
});
});
app.use((error, _req, res, _next) => {
const status = Number(error?.status || 500);
const message = error instanceof Error ? error.message : "internal_error";
res.status(status >= 400 && status < 600 ? status : 500).json({ ok: false, error: message });
});
await migrate();
httpServer.listen(config.port, "0.0.0.0", () => {
console.log(`NODE.DC Notification Core listening on http://0.0.0.0:${config.port}`);
});
process.on("SIGTERM", shutdown);
process.on("SIGINT", shutdown);
async function createNotificationEvent(command) {
const client = await pool.connect();
try {
await client.query("begin");
let event = null;
if (command.idempotencyKey) {
const existing = await client.query(
"select * from notification_events where idempotency_key = $1",
[command.idempotencyKey]
);
if (existing.rowCount > 0) {
event = existing.rows[0];
const deliveries = await loadDeliveriesForEvent(client, event.id);
await client.query("commit");
return { ok: true, created: false, idempotent: true, event: toEvent(event), deliveries };
}
}
const eventId = randomUUID();
const insertedEvent = await client.query(
`insert into notification_events (
id,
type,
source_service,
actor_user_id,
actor_email,
subject_type,
subject_id,
payload,
idempotency_key
) values ($1, $2, $3, $4, $5, $6, $7, $8::jsonb, $9)
returning *`,
[
eventId,
command.type,
command.sourceService,
command.actor.userId,
command.actor.email,
command.subject.type,
command.subject.id,
JSON.stringify(command.payload),
command.idempotencyKey,
]
);
event = insertedEvent.rows[0];
const deliveries = [];
for (const delivery of command.deliveries) {
const insertedDelivery = await client.query(
`insert into notification_deliveries (
id,
event_id,
recipient_user_id,
recipient_email,
surface,
title,
body,
meta,
status,
actionable,
action_type,
action_url,
entity_type,
entity_id
) values ($1, $2, $3, $4, $5, $6, $7, $8::jsonb, $9, $10, $11, $12, $13, $14)
returning *`,
[
randomUUID(),
event.id,
delivery.recipientUserId,
delivery.recipientEmail,
delivery.surface,
delivery.title,
delivery.body,
JSON.stringify(delivery.meta),
delivery.status,
delivery.actionable,
delivery.actionType,
delivery.actionUrl,
delivery.entityType,
delivery.entityId,
]
);
deliveries.push(toDelivery({ ...insertedDelivery.rows[0], event_type: event.type, source_service: event.source_service, event_payload: event.payload }));
}
await client.query("commit");
for (const delivery of deliveries) {
broadcastDeliveryUpdate("notification.delivery.created", delivery);
}
return { ok: true, created: true, event: toEvent(event), deliveries };
} catch (error) {
await client.query("rollback");
throw error;
} finally {
client.release();
}
}
async function listDeliveries({ subject, surface, limit, unreadOnly }) {
const values = [surface, subject.userId, subject.email, limit];
const unreadSql = unreadOnly ? "and d.status = 'unread'" : "";
const result = await pool.query(
`select
d.*,
e.type as event_type,
e.source_service,
e.payload as event_payload
from notification_deliveries d
join notification_events e on e.id = d.event_id
where d.surface = $1
and (
($2::text is not null and d.recipient_user_id = $2)
or ($3::text is not null and lower(d.recipient_email) = lower($3))
)
${unreadSql}
order by d.created_at desc
limit $4`,
values
);
return result.rows.map(toDelivery);
}
async function markDeliveryRead({ subject, deliveryId }) {
const result = await pool.query(
`update notification_deliveries
set status = 'read', read_at = coalesce(read_at, now()), updated_at = now()
where id = $1
and status = 'unread'
and (
($2::text is not null and recipient_user_id = $2)
or ($3::text is not null and lower(recipient_email) = lower($3))
)
returning *`,
[deliveryId, subject.userId, subject.email]
);
if (result.rowCount > 0) {
const delivery = await loadDelivery(result.rows[0].id);
return delivery;
}
const existing = await loadDeliveryForSubject({ subject, deliveryId });
return existing?.status === "read" ? existing : null;
}
async function markAllDeliveriesRead({ subject, surface }) {
const result = await pool.query(
`update notification_deliveries
set status = 'read', read_at = coalesce(read_at, now()), updated_at = now()
where surface = $1
and status = 'unread'
and (
($2::text is not null and recipient_user_id = $2)
or ($3::text is not null and lower(recipient_email) = lower($3))
)`,
[surface, subject.userId, subject.email]
);
return { count: result.rowCount };
}
async function loadDeliveriesForEvent(client, eventId) {
const result = await client.query(
`select
d.*,
e.type as event_type,
e.source_service,
e.payload as event_payload
from notification_deliveries d
join notification_events e on e.id = d.event_id
where d.event_id = $1
order by d.created_at asc`,
[eventId]
);
return result.rows.map(toDelivery);
}
async function loadDelivery(deliveryId) {
const result = await pool.query(
`select
d.*,
e.type as event_type,
e.source_service,
e.payload as event_payload
from notification_deliveries d
join notification_events e on e.id = d.event_id
where d.id = $1`,
[deliveryId]
);
return result.rows[0] ? toDelivery(result.rows[0]) : null;
}
async function loadDeliveryForSubject({ subject, deliveryId }) {
const result = await pool.query(
`select
d.*,
e.type as event_type,
e.source_service,
e.payload as event_payload
from notification_deliveries d
join notification_events e on e.id = d.event_id
where d.id = $1
and (
($2::text is not null and d.recipient_user_id = $2)
or ($3::text is not null and lower(d.recipient_email) = lower($3))
)`,
[deliveryId, subject.userId, subject.email]
);
return result.rows[0] ? toDelivery(result.rows[0]) : null;
}
async function migrate() {
await pool.query(`
create table if not exists notification_events (
id uuid primary key,
type text not null,
source_service text not null,
actor_user_id text,
actor_email text,
subject_type text,
subject_id text,
payload jsonb not null default '{}'::jsonb,
idempotency_key text unique,
created_at timestamptz not null default now()
)
`);
await pool.query(`
create table if not exists notification_deliveries (
id uuid primary key,
event_id uuid not null references notification_events(id) on delete cascade,
recipient_user_id text,
recipient_email text,
surface text not null,
title text not null,
body text not null default '',
meta jsonb not null default '{}'::jsonb,
status text not null default 'unread',
actionable boolean not null default false,
action_type text,
action_url text,
entity_type text,
entity_id text,
created_at timestamptz not null default now(),
updated_at timestamptz not null default now(),
read_at timestamptz,
constraint notification_deliveries_recipient_check
check (recipient_user_id is not null or recipient_email is not null),
constraint notification_deliveries_status_check
check (status in ('unread', 'read', 'archived'))
)
`);
await pool.query("create index if not exists notification_deliveries_recipient_user_idx on notification_deliveries(recipient_user_id, surface, status, created_at desc)");
await pool.query("create index if not exists notification_deliveries_recipient_email_idx on notification_deliveries(lower(recipient_email), surface, status, created_at desc)");
await pool.query("create index if not exists notification_events_type_idx on notification_events(type, created_at desc)");
}
function sanitizeEventCommand(payload) {
const type = requireNonEmptyString(payload?.type, "type");
const sourceService = normalizeKey(payload?.sourceService || payload?.source_service || "platform");
const deliveries = Array.isArray(payload?.deliveries) ? payload.deliveries.map(sanitizeDeliveryCommand).filter(Boolean) : [];
if (deliveries.length === 0) {
throw badRequest("deliveries_required");
}
return {
type,
sourceService,
actor: sanitizeActor(payload?.actor),
subject: sanitizeSubject(payload?.subject),
payload: isPlainObject(payload?.payload) ? payload.payload : {},
deliveries,
idempotencyKey: optionalString(payload?.idempotencyKey || payload?.idempotency_key),
};
}
function sanitizeDeliveryCommand(payload) {
const recipientUserId = optionalString(payload?.recipientUserId || payload?.recipient_user_id);
const recipientEmail = normalizeEmail(payload?.recipientEmail || payload?.recipient_email);
if (!recipientUserId && !recipientEmail) {
return null;
}
return {
recipientUserId,
recipientEmail,
surface: sanitizeSurface(payload?.surface || "hub"),
title: requireNonEmptyString(payload?.title, "delivery.title"),
body: optionalString(payload?.body) || "",
meta: isPlainObject(payload?.meta) ? payload.meta : {},
status: sanitizeStatus(payload?.status || "unread"),
actionable: payload?.actionable === true,
actionType: optionalString(payload?.actionType || payload?.action_type),
actionUrl: optionalString(payload?.actionUrl || payload?.action_url),
entityType: optionalString(payload?.entityType || payload?.entity_type),
entityId: optionalString(payload?.entityId || payload?.entity_id),
};
}
function sanitizeActor(payload) {
const actor = isPlainObject(payload) ? payload : {};
return {
userId: optionalString(actor.userId || actor.user_id),
email: normalizeEmail(actor.email),
};
}
function sanitizeSubject(payload) {
const subject = isPlainObject(payload) ? payload : {};
return {
type: optionalString(subject.type),
id: optionalString(subject.id),
};
}
function getRequestSubject(req) {
const userId = optionalString(req.headers["x-nodedc-user-id"] || req.query.userId);
const email = normalizeEmail(req.headers["x-nodedc-user-email"] || req.query.email);
if (!userId && !email) {
throw badRequest("notification_subject_required");
}
return { userId, email };
}
function toEvent(row) {
return {
id: row.id,
type: row.type,
sourceService: row.source_service,
actorUserId: row.actor_user_id,
actorEmail: row.actor_email,
subjectType: row.subject_type,
subjectId: row.subject_id,
payload: row.payload || {},
idempotencyKey: row.idempotency_key,
createdAt: toIso(row.created_at),
};
}
function toDelivery(row) {
return {
id: row.id,
eventId: row.event_id,
eventType: row.event_type,
sourceService: row.source_service,
recipientUserId: row.recipient_user_id,
recipientEmail: row.recipient_email,
surface: row.surface,
title: row.title,
body: row.body,
meta: row.meta || {},
status: row.status,
unread: row.status === "unread",
actionable: row.actionable,
actionType: row.action_type,
actionUrl: row.action_url,
entityType: row.entity_type,
entityId: row.entity_id,
eventPayload: row.event_payload || {},
createdAt: toIso(row.created_at),
updatedAt: toIso(row.updated_at),
readAt: toIso(row.read_at),
};
}
function broadcastDeliveryUpdate(eventName, delivery) {
for (const client of streamClients) {
if (!deliveryMatchesClient(delivery, client)) continue;
writeSse(client.res, eventName, { delivery });
}
}
function broadcastSubjectUpdate(eventName, payload) {
for (const client of streamClients) {
if (client.surface !== payload.surface) continue;
if (!subjectsMatch(client.subject, payload.subject)) continue;
writeSse(client.res, eventName, payload);
}
}
function deliveryMatchesClient(delivery, client) {
if (delivery.surface !== client.surface) return false;
return subjectsMatch(client.subject, {
userId: delivery.recipientUserId,
email: delivery.recipientEmail,
});
}
function subjectsMatch(left, right) {
return Boolean(
(left.userId && right.userId && left.userId === right.userId) ||
(left.email && right.email && left.email.toLowerCase() === right.email.toLowerCase())
);
}
function writeSse(res, event, data) {
res.write(`event: ${event}\ndata: ${JSON.stringify(data)}\n\n`);
}
function requireInternalApi(req, res, next) {
if (!config.internalAccessToken) {
res.status(503).json({ ok: false, error: "notification_core_internal_token_not_configured" });
return;
}
const authorization = typeof req.headers.authorization === "string" ? req.headers.authorization : "";
const bearerToken = authorization.match(/^Bearer\s+(.+)$/i)?.[1] || "";
const headerToken = typeof req.headers["x-nodedc-internal-token"] === "string" ? req.headers["x-nodedc-internal-token"] : "";
const requestToken = bearerToken || headerToken;
if (!safeTokenEquals(requestToken, config.internalAccessToken)) {
res.status(401).json({ ok: false, error: "notification_core_unauthorized" });
return;
}
next();
}
function safeTokenEquals(actual, expected) {
if (!actual || !expected) return false;
const actualBuffer = Buffer.from(actual);
const expectedBuffer = Buffer.from(expected);
if (actualBuffer.length !== expectedBuffer.length) return false;
return timingSafeEqual(actualBuffer, expectedBuffer);
}
function sanitizeSurface(value) {
const surface = normalizeKey(value || "hub");
if (!["hub", "engine", "operational-core"].includes(surface)) {
throw badRequest("unsupported_notification_surface");
}
return surface;
}
function sanitizeStatus(value) {
const status = normalizeKey(value || "unread");
if (!["unread", "read", "archived"].includes(status)) {
throw badRequest("unsupported_notification_status");
}
return status;
}
function sanitizeLimit(value) {
const limit = Number(value || 100);
if (!Number.isFinite(limit)) return 100;
return Math.min(Math.max(Math.trunc(limit), 1), 200);
}
function sanitizeUuid(value, name) {
const text = optionalString(value);
if (!/^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(text || "")) {
throw badRequest(`${name}_invalid`);
}
return text;
}
function requireNonEmptyString(value, name) {
const text = optionalString(value);
if (!text) throw badRequest(`${name}_required`);
return text;
}
function optionalString(value) {
if (typeof value !== "string") return null;
const text = value.trim();
return text ? text : null;
}
function normalizeEmail(value) {
const text = optionalString(value);
return text ? text.toLowerCase() : null;
}
function normalizeKey(value) {
return String(value || "").trim().toLowerCase().replace(/_/g, "-");
}
function isPlainObject(value) {
return Boolean(value && typeof value === "object" && !Array.isArray(value));
}
function toIso(value) {
if (!value) return null;
return value instanceof Date ? value.toISOString() : new Date(value).toISOString();
}
function badRequest(message) {
const error = new Error(message);
error.status = 400;
return error;
}
function asyncRoute(handler) {
return (req, res, next) => {
Promise.resolve(handler(req, res, next)).catch(next);
};
}
function readConfig() {
const databaseUrl =
process.env.DATABASE_URL ||
process.env.NOTIFICATION_DATABASE_URL ||
"postgres://nodedc_notifications:nodedc_notifications@localhost:5432/nodedc_notifications";
return {
port: Number(process.env.PORT || process.env.NOTIFICATION_CORE_PORT || "5185"),
databaseUrl,
databasePoolSize: Number(process.env.NOTIFICATION_DATABASE_POOL_SIZE || "10"),
internalAccessToken:
process.env.NODEDC_INTERNAL_ACCESS_TOKEN ||
process.env.NODEDC_PLATFORM_SERVICE_TOKEN ||
"",
};
}
async function shutdown() {
try {
httpServer.close();
await pool.end();
} finally {
process.exit(0);
}
}