initial commit

fluxer_api/src/utils/InviteUtils.ts

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+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {Config} from '~/Config';
+import * as RegexUtils from '~/utils/RegexUtils';
+
+const INVITE_PATTERN = new RegExp(
+	[
+		'(?:https?:\\/\\/)?',
+		'(?:',
+		`${RegexUtils.escapeRegex(Config.hosts.invite)}(?:\\/#)?\\/(?!invite\\/)([a-zA-Z0-9\\-]{2,32})(?![a-zA-Z0-9\\-])`,
+		'|',
+		`${RegexUtils.escapeRegex(new URL(Config.endpoints.webApp).hostname)}(?:\\/#)?\\/invite\\/([a-zA-Z0-9\\-]{2,32})(?![a-zA-Z0-9\\-])`,
+		')',
+	].join(''),
+	'gi',
+);
+
+export function findInvites(content: string | null): Array<string> {
+	if (!content) return [];
+
+	const invites: Array<string> = [];
+	const seenCodes = new Set<string>();
+
+	INVITE_PATTERN.lastIndex = 0;
+
+	let match: RegExpExecArray | null;
+	while ((match = INVITE_PATTERN.exec(content)) !== null && invites.length < 10) {
+		const code = match[1] || match[2];
+		if (code && !seenCodes.has(code)) {
+			seenCodes.add(code);
+			invites.push(code);
+		}
+	}
+
+	return invites;
+}
+
+export function findInvite(content: string | null): string | null {
+	if (!content) return null;
+
+	INVITE_PATTERN.lastIndex = 0;
+	const match = INVITE_PATTERN.exec(content);
+
+	if (match) {
+		return match[1] || match[2];
+	}
+
+	return null;
+}