Function checkAuthentication

public/js/auth.js:495–563

(showLoginToast = true)

}

function checkAuthentication(showLoginToast = true) {
  return sendRequest("/api/auth/checkAuth.php")
    .then(data => {
      if (data.setup) {
        const overlay = document.getElementById('loadingOverlay');
        if (overlay) overlay.remove();

        // keep app shell hidden during setup
        const wrap = document.querySelector('.main-wrapper');
        if (wrap) {
          wrap.setAttribute('hidden', '');
          wrap.style.display = 'none';
        }
        document.getElementById('loginForm').style.display = 'none';
        window.setupMode = true;
        if (showLoginToast) showToast(t('setup_no_users'));
        toggleVisibility("loginForm", false);
        toggleVisibility("mainOperations", false);
        document.querySelector(".header-buttons").style.visibility = "hidden";
        toggleVisibility("addUserModal", true);
        document.getElementById("newUsername").focus();
        return false;
      }
      window.setupMode = false;
      if (data.authenticated) {

        localStorage.setItem('isAdmin', data.isAdmin ? 'true' : 'false');
        localStorage.setItem("folderOnly", data.folderOnly);
        localStorage.setItem("readOnly", data.readOnly);
        localStorage.setItem("disableUpload", data.disableUpload);
        updateLoginOptionsUIFromStorage();
        applyProxyBypassUI();
        if (typeof data.totp_enabled !== "undefined") {
          localStorage.setItem("userTOTPEnabled", data.totp_enabled ? "true" : "false");
        }
        if (data.csrf_token) {
          window.csrfToken = data.csrf_token;
          document.querySelector('meta[name="csrf-token"]').content = data.csrf_token;
        }
        updateAuthenticatedUI(data);
        return data;

        // at the end of updateAuthenticatedUI(data)
        if (!window.__FR_FLAGS?.initialized && typeof initializeApp === 'function') {
          initializeApp();
          window.__FR_FLAGS.initialized = true;
        }
        if (typeof applyTranslations === 'function') applyTranslations();
        if (typeof updateLoginOptionsUIFromStorage === 'function') updateLoginOptionsUIFromStorage();
      } else {
        const overlay = document.getElementById('loadingOverlay');
        if (overlay) overlay.remove();

        // show the wrapper (so the login form can be visible)
        document.querySelector('.main-wrapper').style.display = '';
        document.getElementById('loginForm').style.display = '';
        if (showLoginToast) showToast(t('please_log_in_to_continue'));
        toggleVisibility("loginForm", !(localStorage.getItem("authBypass") === "true"));