100 lines
2.7 KiB
TypeScript
100 lines
2.7 KiB
TypeScript
import { randomBytes } from "node:crypto";
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export type LinkTokenPayloadV1 = {
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v: 1;
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nonce: string;
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exp: number;
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};
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const TOKEN_TTL_SEC = Number(process.env.TELEGRAM_LINK_TOKEN_TTL_SEC || 10 * 60);
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export function requireBotUsername() {
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const botUsername = String(process.env.TELEGRAM_BOT_USERNAME || "").trim().replace(/^@/, "");
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if (!botUsername) {
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throw createError({ statusCode: 500, statusMessage: "TELEGRAM_BOT_USERNAME is required" });
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}
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return botUsername;
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}
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export function issueLinkToken(input: { teamId: string; userId: string }) {
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void input;
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// Telegram deep-link `start` parameter is limited, keep token very short.
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const token = randomBytes(12).toString("hex");
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const payload: LinkTokenPayloadV1 = {
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v: 1,
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nonce: token,
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exp: Math.floor(Date.now() / 1000) + Math.max(60, TOKEN_TTL_SEC),
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};
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return { token, payload };
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}
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export function verifyLinkToken(token: string): LinkTokenPayloadV1 | null {
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const raw = String(token || "").trim();
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if (!/^[a-f0-9]{24}$/.test(raw)) return null;
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return {
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v: 1,
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nonce: raw,
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exp: 0,
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};
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}
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export function extractLinkTokenFromStartText(text: string) {
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const trimmed = String(text || "").trim();
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if (!trimmed.startsWith("/start")) return null;
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const parts = trimmed.split(/\s+/).filter(Boolean);
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if (parts.length < 2) return null;
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const arg = parts[1] || "";
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if (!arg.startsWith("link_")) return null;
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return arg.slice("link_".length);
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}
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export function buildTelegramStartUrl(token: string) {
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const botUsername = requireBotUsername();
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return `https://t.me/${botUsername}?start=link_${token}`;
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}
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export function getTelegramChatIdFromUpdate(update: any): string | null {
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const candidates = [
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update?.message?.chat?.id,
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update?.business_message?.chat?.id,
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update?.edited_business_message?.chat?.id,
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update?.business_connection?.user_chat_id,
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];
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for (const c of candidates) {
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if (c == null) continue;
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const v = String(c).trim();
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if (v) return v;
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}
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return null;
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}
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export function getBusinessConnectionFromUpdate(update: any): {
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id: string;
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userChatId: string | null;
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isEnabled: boolean | null;
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canReply: boolean | null;
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raw: any;
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} | null {
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const bc = (update?.business_connection ?? null) as any;
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if (!bc || typeof bc !== "object") return null;
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const id = String(bc.id ?? "").trim();
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if (!id) return null;
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const userChatId = bc.user_chat_id != null ? String(bc.user_chat_id) : null;
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const isEnabled = typeof bc.is_enabled === "boolean" ? bc.is_enabled : null;
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const canReply = typeof bc.can_reply === "boolean"
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? bc.can_reply
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: typeof bc.rights?.can_reply === "boolean"
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? bc.rights.can_reply
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: null;
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return {
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id,
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userChatId,
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isEnabled,
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canReply,
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raw: bc,
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};
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}
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