WIP: first pass, OpenID Proxy Auth

api/server/controllers/auth/oauth.js

@@ -0,0 +1,50 @@
+const { isEnabled } = require('@librechat/api');
+const { logger } = require('@librechat/data-schemas');
+const { syncUserEntraGroupMemberships } = require('~/server/services/PermissionService');
+const { setAuthTokens, setOpenIDAuthTokens } = require('~/server/services/AuthService');
+const { checkBan } = require('~/server/middleware');
+
+const domains = {
+  client: process.env.DOMAIN_CLIENT,
+  server: process.env.DOMAIN_SERVER,
+};
+
+function createOAuthHandler(redirectUri = domains.client) {
+  /**
+   * A handler to process OAuth authentication results.
+   * @type {Function}
+   * @param {ServerRequest} req - Express request object.
+   * @param {ServerResponse} res - Express response object.
+   * @param {NextFunction} next - Express next middleware function.
+   */
+  return async (req, res, next) => {
+    try {
+      if (res.headersSent) {
+        return;
+      }
+
+      await checkBan(req, res);
+      if (req.banned) {
+        return;
+      }
+      if (
+        req.user &&
+        req.user.provider == 'openid' &&
+        isEnabled(process.env.OPENID_REUSE_TOKENS) === true
+      ) {
+        await syncUserEntraGroupMemberships(req.user, req.user.tokenset.access_token);
+        setOpenIDAuthTokens(req.user.tokenset, res, req.user._id.toString());
+      } else {
+        await setAuthTokens(req.user._id, res);
+      }
+      res.redirect(redirectUri);
+    } catch (err) {
+      logger.error('Error in setting authentication tokens:', err);
+      next(err);
+    }
+  };
+}
+
+module.exports = {
+  createOAuthHandler,
+};