Link nostr entities and URLs in chat messages
Image URLs included
This commit is contained in:
dtonon
parent
19b71a87c0
commit
fc51e33ceb
2 changed files with 214 additions and 54 deletions
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@ -1,6 +1,6 @@
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<script lang="ts">
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import * as nip19 from "@nostr/tools/nip19";
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import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
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import { tokenizeChat } from "$lib/linkify";
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type Props = {
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content: string;
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@ -9,53 +9,7 @@
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let { content, profiles = {} }: Props = $props();
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type Token =
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| { type: "text"; value: string }
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| { type: "mention"; pubkey: string; entity: string; fallback: string };
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const MENTION_RE = /nostr:(npub1[a-z0-9]+|nprofile1[a-z0-9]+)/gi;
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function shortEntity(entity: string): string {
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const m = entity.match(/^(npub|nprofile)1/);
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if (!m) return entity;
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const prefix = m[0];
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const rest = entity.slice(prefix.length);
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if (rest.length <= 12) return entity;
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return `${prefix}${rest.slice(0, 6)}…${rest.slice(-4)}`;
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}
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const tokens = $derived.by<Token[]>(() => {
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const out: Token[] = [];
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let last = 0;
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for (const m of content.matchAll(MENTION_RE)) {
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const start = m.index ?? 0;
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const entity = m[1].toLowerCase();
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let pubkey: string | null = null;
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try {
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const decoded = nip19.decode(entity);
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if (decoded.type === "npub") pubkey = decoded.data;
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else if (decoded.type === "nprofile") pubkey = decoded.data.pubkey;
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} catch {
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// Invalid bech32, fall through to text
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}
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if (start > last)
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out.push({ type: "text", value: content.slice(last, start) });
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if (pubkey) {
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out.push({
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type: "mention",
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pubkey,
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entity,
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fallback: shortEntity(entity),
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});
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} else {
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out.push({ type: "text", value: m[0] });
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}
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last = start + m[0].length;
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}
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if (last < content.length)
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out.push({ type: "text", value: content.slice(last) });
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return out;
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});
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const tokens = $derived(tokenizeChat(content));
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let resolvedUsers = $state<Record<string, NostrUser>>({});
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@ -77,5 +31,16 @@
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target="_blank"
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rel="noopener noreferrer"
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class="text-brand hover:underline">@{u?.shortName ?? t.fallback}</a
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>{:else if t.type === "entity"}<a
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href={t.href}
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target="_blank"
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rel="noopener noreferrer"
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class="text-brand hover:underline">{t.label}</a
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>{:else if t.type === "link"}<a
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href={t.href}
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title={t.href}
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target="_blank"
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rel="noopener noreferrer"
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class="text-brand hover:underline">{t.label}</a
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>{:else}{t.value}{/if}{/each}</span
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>
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195
src/lib/linkify.ts
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195
src/lib/linkify.ts
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@ -0,0 +1,195 @@
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import * as nip19 from "@nostr/tools/nip19";
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// Curated TLD list: gTLDs, popular new gTLDs, common ccTLDs
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const TLDS = [
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"com",
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"org",
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"net",
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"edu",
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"gov",
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"mil",
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"int",
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"info",
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"biz",
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"name",
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"pro",
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"io",
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"co",
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"app",
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"dev",
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"ai",
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"sh",
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"me",
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"ly",
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"tv",
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"fm",
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"lol",
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"club",
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"online",
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"site",
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"store",
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"blog",
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"tech",
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"xyz",
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"art",
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"design",
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"news",
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"media",
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"page",
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"link",
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"fun",
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"gg",
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"gl",
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"st",
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"to",
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"run",
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"life",
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"world",
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"space",
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"cloud",
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"email",
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"social",
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"chat",
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"wtf",
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"cafe",
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"zone",
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"studio",
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"us",
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"uk",
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"de",
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"fr",
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"it",
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"es",
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"nl",
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"ru",
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"jp",
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"cn",
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"ca",
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"au",
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"br",
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"in",
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"mx",
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"se",
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"no",
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"fi",
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"dk",
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"ch",
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"at",
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"be",
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"pl",
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"pt",
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"gr",
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"cz",
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"ie",
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"nz",
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"kr",
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"sg",
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"hk",
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"tw",
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"za",
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"cc",
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"ws",
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"eu",
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"tr",
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"ua",
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"il",
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"ar",
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"cl",
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"pe",
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].join("|");
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// Matches nostr entities, http(s) URLs, and bare domains
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const URL_SOURCE = `nostr:(?:npub1|nprofile1|note1|nevent1|naddr1)[a-z0-9]+|https?:\\/\\/[^\\s<>"']+|(?<![\\w@.\\/])(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+(?:${TLDS})\\b(?:[\\/?#][^\\s<>"']*)?`;
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// Trailing punctuation that is usually not part of the URL
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const TRAILING_PUNCT_RE = /[).,;:!?'"]+$/;
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export type ChatToken =
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| { type: "text"; value: string }
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| { type: "link"; href: string; label: string }
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| { type: "mention"; pubkey: string; entity: string; fallback: string }
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| { type: "entity"; entity: string; href: string; label: string };
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// Shorten a nostr entity to xxxxxxxx...xxxx
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export function shortNostrEntity(entity: string): string {
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if (entity.length <= 12) return entity;
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return `${entity.slice(0, 8)}...${entity.slice(-4)}`;
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}
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// Shorten a URL to domain.tld/...last-10-chars-of-the-final-part
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export function shortUrl(href: string): string {
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const rest = href.replace(/^https?:\/\//i, "").replace(/\/+$/, "");
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const slash = rest.indexOf("/");
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if (slash === -1) return rest;
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const host = rest.slice(0, slash);
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const path = rest.slice(slash + 1);
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if (path === "") return host;
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const finalPart = path.slice(path.lastIndexOf("/") + 1);
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const tail = finalPart.length > 10 ? finalPart.slice(-10) : finalPart;
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return `${host}/...${tail}`;
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}
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function decodeEntity(entity: string): ChatToken | null {
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try {
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const decoded = nip19.decode(entity);
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if (decoded.type === "npub")
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return {
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type: "mention",
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pubkey: decoded.data,
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entity,
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fallback: shortNostrEntity(entity),
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};
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if (decoded.type === "nprofile")
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return {
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type: "mention",
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pubkey: decoded.data.pubkey,
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entity,
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fallback: shortNostrEntity(entity),
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};
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if (decoded.type === "note" || decoded.type === "nevent" || decoded.type === "naddr")
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return {
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type: "entity",
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entity,
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href: `https://njump.me/${entity}`,
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label: shortNostrEntity(entity),
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};
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} catch {
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// Invalid bech32, fall through to text
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}
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return null;
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}
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// Tokenize a plain-text chat message into text, links, mentions and entities.
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// Image URLs are treated as plain links (never embedded).
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export function tokenizeChat(content: string): ChatToken[] {
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const out: ChatToken[] = [];
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let last = 0;
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const re = new RegExp(URL_SOURCE, "gi");
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for (const m of content.matchAll(re)) {
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const start = m.index ?? 0;
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let raw = m[0];
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const isNostr = /^nostr:/i.test(raw);
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let trailing = "";
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if (!isNostr) {
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const trail = raw.match(TRAILING_PUNCT_RE);
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if (trail) {
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trailing = trail[0];
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raw = raw.slice(0, -trailing.length);
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}
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}
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if (start > last)
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out.push({ type: "text", value: content.slice(last, start) });
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if (isNostr) {
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const entity = raw.slice(6).toLowerCase();
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const token = decodeEntity(entity);
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out.push(token ?? { type: "text", value: m[0] });
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} else {
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const href = /^https?:\/\//i.test(raw) ? raw : `https://${raw}`;
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out.push({ type: "link", href, label: shortUrl(href) });
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if (trailing) out.push({ type: "text", value: trailing });
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}
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last = start + m[0].length;
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}
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if (last < content.length)
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out.push({ type: "text", value: content.slice(last) });
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return out;
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}
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