55 lines
1.5 KiB
TypeScript
55 lines
1.5 KiB
TypeScript
export type TelegramTarget = {
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chatId: string;
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messageThreadId?: number;
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};
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export function stripTelegramInternalPrefixes(to: string): string {
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let trimmed = to.trim();
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let strippedTelegramPrefix = false;
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while (true) {
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const next = (() => {
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if (/^(telegram|tg):/i.test(trimmed)) {
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strippedTelegramPrefix = true;
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return trimmed.replace(/^(telegram|tg):/i, "").trim();
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}
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// Legacy internal form: `telegram:group:<id>` (still emitted by session keys).
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if (strippedTelegramPrefix && /^group:/i.test(trimmed)) {
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return trimmed.replace(/^group:/i, "").trim();
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}
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return trimmed;
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})();
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if (next === trimmed) return trimmed;
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trimmed = next;
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}
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}
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/**
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* Parse a Telegram delivery target into chatId and optional topic/thread ID.
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*
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* Supported formats:
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* - `chatId` (plain chat ID, t.me link, @username, or internal prefixes like `telegram:...`)
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* - `chatId:topicId` (numeric topic/thread ID)
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* - `chatId:topic:topicId` (explicit topic marker; preferred)
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*/
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export function parseTelegramTarget(to: string): TelegramTarget {
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const normalized = stripTelegramInternalPrefixes(to);
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const topicMatch = /^(.+?):topic:(\d+)$/.exec(normalized);
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if (topicMatch) {
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return {
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chatId: topicMatch[1],
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messageThreadId: Number.parseInt(topicMatch[2], 10),
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};
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}
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const colonMatch = /^(.+):(\d+)$/.exec(normalized);
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if (colonMatch) {
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return {
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chatId: colonMatch[1],
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messageThreadId: Number.parseInt(colonMatch[2], 10),
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};
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}
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return { chatId: normalized };
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}
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