v3: follows, notifications, invite-only registration, unread markers
This commit is contained in:
khannurien
212
api/services/notification-service.ts
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212
api/services/notification-service.ts
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@@ -0,0 +1,212 @@
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import type {
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Notification,
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NotificationData,
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NotificationType,
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} from "../model/interfaces.ts";
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import { APIErrorCode, APIException } from "../model/interfaces.ts";
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import { db, isNotificationRow, notificationRowToApi } from "../model/db.ts";
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import { sendToUser } from "./ws-service.ts";
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// ── Core CRUD ─────────────────────────────────────────────────────────────────
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// sourceKey: if set, INSERT OR IGNORE — same (user_id, source_key) pair is a no-op.
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function createNotification(
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userId: string,
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type: NotificationType,
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data: NotificationData,
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sourceKey: string | null = null,
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): void {
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const id = crypto.randomUUID();
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const createdAt = new Date().toISOString();
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const dataJson = JSON.stringify(data);
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let changes: number;
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if (sourceKey) {
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// INSERT OR IGNORE: idempotent — same (user_id, source_key) pair is a no-op
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const result = db.prepare(
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`INSERT OR IGNORE INTO notifications (id, user_id, type, data, read, created_at, source_key)
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VALUES (?, ?, ?, ?, 0, ?, ?);`,
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).run(id, userId, type, dataJson, createdAt, sourceKey);
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changes = result.changes as number;
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} else {
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const result = db.prepare(
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`INSERT INTO notifications (id, user_id, type, data, read, created_at, source_key)
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VALUES (?, ?, ?, ?, 0, ?, NULL);`,
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).run(id, userId, type, dataJson, createdAt);
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changes = result.changes as number;
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}
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if (changes > 0) {
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sendToUser(userId, {
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type: "notification_created",
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notification: { id, userId, type, data, read: false, createdAt },
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});
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}
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}
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export function getNotificationsForUser(
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userId: string,
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page: number,
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limit: number,
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): { items: Notification[]; total: number } {
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const offset = (page - 1) * limit;
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const rawRows = db.prepare(
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`SELECT * FROM notifications WHERE user_id = ? ORDER BY created_at DESC LIMIT ? OFFSET ?;`,
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).all(userId, limit, offset) as Parameters<typeof isNotificationRow>[0][];
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const totalRow = db.prepare(
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`SELECT COUNT(*) as count FROM notifications WHERE user_id = ?;`,
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).get(userId) as { count: number } | undefined;
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if (!rawRows.every(isNotificationRow)) {
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throw new APIException(
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APIErrorCode.SERVER_ERROR,
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500,
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"Malformed notification data",
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);
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}
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return {
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items: rawRows.map(notificationRowToApi),
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total: totalRow?.count ?? 0,
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};
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}
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export function getUnreadCount(userId: string): number {
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const row = db.prepare(
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`SELECT COUNT(*) as count FROM notifications WHERE user_id = ? AND read = 0;`,
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).get(userId) as { count: number } | undefined;
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return row?.count ?? 0;
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}
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export function markAllRead(userId: string): void {
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db.prepare(`UPDATE notifications SET read = 1 WHERE user_id = ?;`).run(
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userId,
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);
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}
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export function markOneRead(notificationId: string, userId: string): void {
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db.prepare(
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`UPDATE notifications SET read = 1 WHERE id = ? AND user_id = ?;`,
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).run(notificationId, userId);
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}
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// ── Trigger helpers ───────────────────────────────────────────────────────────
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export function notifyUserNewFollower(
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followerId: string,
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followedUserId: string,
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): void {
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const followerRow = db.prepare(
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`SELECT username FROM users WHERE id = ?;`,
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).get(followerId) as { username: string } | undefined;
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if (!followerRow) return;
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createNotification(
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followedUserId,
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"user_followed",
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{ followerId, followerUsername: followerRow.username },
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`user-followed:${followedUserId}:${followerId}`,
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);
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}
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export function notifyPlaylistOwnerNewFollower(
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followerId: string,
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playlistId: string,
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): void {
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const followerRow = db.prepare(
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`SELECT username FROM users WHERE id = ?;`,
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).get(followerId) as { username: string } | undefined;
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const playlistRow = db.prepare(
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`SELECT title, user_id FROM playlists WHERE id = ?;`,
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).get(playlistId) as { title: string; user_id: string } | undefined;
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if (!followerRow || !playlistRow) return;
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if (followerId === playlistRow.user_id) return;
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createNotification(
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playlistRow.user_id,
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"playlist_followed",
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{
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followerId,
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followerUsername: followerRow.username,
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playlistId,
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playlistTitle: playlistRow.title,
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},
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`followed:${playlistId}:${followerId}`,
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);
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}
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export function notifyUserFollowersNewDump(
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dumperId: string,
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dumpId: string,
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dumpTitle: string,
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): void {
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const posterRow = db.prepare(
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`SELECT username FROM users WHERE id = ?;`,
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).get(dumperId) as { username: string } | undefined;
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if (!posterRow) return;
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const followerRows = db.prepare(
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`SELECT follower_id FROM follows WHERE followed_user_id = ?;`,
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).all(dumperId) as { follower_id: string }[];
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for (const row of followerRows) {
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createNotification(
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row.follower_id,
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"user_dump_posted",
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{ dumperId, dumperUsername: posterRow.username, dumpId, dumpTitle },
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`dump:${dumpId}`,
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);
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}
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}
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export function notifyDumpOwnerUpvote(
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voterId: string,
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dumpId: string,
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): void {
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const voterRow = db.prepare(
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`SELECT username FROM users WHERE id = ?;`,
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).get(voterId) as { username: string } | undefined;
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const dumpRow = db.prepare(
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`SELECT title, user_id FROM dumps WHERE id = ?;`,
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).get(dumpId) as { title: string; user_id: string } | undefined;
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if (!voterRow || !dumpRow) return;
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if (voterId === dumpRow.user_id) return; // no self-notification
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createNotification(
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dumpRow.user_id,
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"dump_upvoted",
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{
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voterId,
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voterUsername: voterRow.username,
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dumpId,
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dumpTitle: dumpRow.title,
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},
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`upvote:${dumpId}:${voterId}`,
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);
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}
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export function notifyPlaylistFollowersNewDump(
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playlistId: string,
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playlistTitle: string,
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dumpId: string,
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dumpTitle: string,
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): void {
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const followerRows = db.prepare(
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`SELECT follower_id FROM follows WHERE followed_playlist_id = ?;`,
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).all(playlistId) as { follower_id: string }[];
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for (const row of followerRows) {
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createNotification(
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row.follower_id,
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"playlist_dump_added",
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{ dumpId, dumpTitle, playlistId, playlistTitle },
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`pdump:${playlistId}:${dumpId}`,
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);
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}
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}
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