46 lines
1.5 KiB
TypeScript
46 lines
1.5 KiB
TypeScript
import Nostrich from "nostrich.webp";
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import { TaggedRawEvent } from "Nostr";
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import EventKind from "Nostr/EventKind";
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import type { NotificationRequest } from "State/Login";
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import { MetadataCache, UsersDb } from "State/Users";
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import { getDisplayName } from "Element/ProfileImage";
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import { MentionRegex } from "Const";
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export async function makeNotification(db: UsersDb, ev: TaggedRawEvent): Promise<NotificationRequest | null> {
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switch (ev.kind) {
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case EventKind.TextNote: {
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const pubkeys = new Set([ev.pubkey, ...ev.tags.filter(a => a[0] === "p").map(a => a[1])]);
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const users = await db.bulkGet(Array.from(pubkeys));
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const fromUser = users.find(a => a?.pubkey === ev.pubkey);
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const name = getDisplayName(fromUser, ev.pubkey);
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const avatarUrl = fromUser?.picture || Nostrich;
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return {
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title: `Reply from ${name}`,
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body: replaceTagsWithUser(ev, users).substring(0, 50),
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icon: avatarUrl,
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timestamp: ev.created_at * 1000,
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};
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}
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}
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return null;
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}
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function replaceTagsWithUser(ev: TaggedRawEvent, users: MetadataCache[]) {
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return ev.content
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.split(MentionRegex)
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.map(match => {
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const matchTag = match.match(/#\[(\d+)\]/);
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if (matchTag && matchTag.length === 2) {
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const idx = parseInt(matchTag[1]);
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const ref = ev.tags[idx];
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if (ref && ref[0] === "p" && ref.length > 1) {
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const u = users.find(a => a.pubkey === ref[1]);
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return `@${getDisplayName(u, ref[1])}`;
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}
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}
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return match;
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})
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.join();
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}
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