refactor progress

packages/oauth2/src/OAuth2.tsx

@@ -0,0 +1,48 @@
+/*
+ * 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 {randomBytes} from 'node:crypto';
+
+export interface OAuth2Config {
+	clientId: string;
+	clientSecret: string;
+	redirectUri: string;
+	authorizeEndpoint: string;
+	tokenEndpoint: string;
+	scope: string;
+}
+
+export function generateState(): string {
+	return randomBytes(32).toString('base64url');
+}
+
+export function authorizeUrl(config: OAuth2Config, state: string): string {
+	const params = new URLSearchParams({
+		response_type: 'code',
+		client_id: config.clientId,
+		redirect_uri: config.redirectUri,
+		scope: config.scope,
+		state,
+	});
+	return `${config.authorizeEndpoint}?${params.toString()}`;
+}
+
+export function base64EncodeString(str: string): string {
+	return Buffer.from(str).toString('base64');
+}