<?php

/**

 * @file

 * User page callback file for the user module.

 */

/**

 * Menu callback; Retrieve a JSON object containing autocomplete suggestions for existing users.

 */

function user_autocomplete($string = '') {

  $matches = array();

  if ($string) {

    $result = db_select('users')->fields('users', array('name'))->condition('name', db_like($string) . '%', 'LIKE')->range(0, 10)->execute();

    foreach ($result as $user) {

      $matches[$user->name] = check_plain($user->name);

    }

  }

  drupal_json_output($matches);

}

/**

 * Form builder; Request a password reset.

 *

 * @ingroup forms

 * @see user_pass_validate()

 * @see user_pass_submit()

 */

function user_pass() {

  global $user;

  $form['name'] = array(

    '#type' => 'textfield',

    '#title' => t('Username or e-mail address'),

    '#size' => 60,

    '#maxlength' => max(USERNAME_MAX_LENGTH, EMAIL_MAX_LENGTH),

    '#required' => TRUE,

    '#default_value' => isset($_GET['name']) ? $_GET['name'] : '',

  );

  // Allow logged in users to request this also.

  if ($user->uid > 0) {

    $form['name']['#type'] = 'value';

    $form['name']['#value'] = $user->mail;

    $form['mail'] = array(

      '#prefix' => '<p>',

      // As of https://www.drupal.org/node/889772 the user no longer must log

      // out (if they are still logged in when using the password reset link,

      // they will be logged out automatically then), but this text is kept as

      // is to avoid breaking translations as well as to encourage the user to

      // log out manually at a time of their own choosing (when it will not

      // interrupt anything else they may have been in the middle of doing).

      '#markup' =>  t('Password reset instructions will be mailed to %email. You must log out to use the password reset link in the e-mail.', array('%email' => $user->mail)),

      '#suffix' => '</p>',

    );

  }

  $form['actions'] = array('#type' => 'actions');

  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('E-mail new password'));

  return $form;

}

/**

 * Form validation handler for user_pass().

 *

 * @see user_pass_submit()

 */

function user_pass_validate($form, &$form_state) {

  $name = trim($form_state['values']['name']);

  // Try to load by email.

  $users = user_load_multiple(array(), array('mail' => $name, 'status' => '1'));

  $account = reset($users);

  if (!$account) {

    // No success, try to load by name.

    $users = user_load_multiple(array(), array('name' => $name, 'status' => '1'));

    $account = reset($users);

  }

  if (isset($account->uid)) {

    form_set_value(array('#parents' => array('account')), $account, $form_state);

  }

  else {

    form_set_error('name', t('Sorry, %name is not recognized as a user name or an e-mail address.', array('%name' => $name)));

  }

}

/**

 * Form submission handler for user_pass().

 *

 * @see user_pass_validate()

 */

function user_pass_submit($form, &$form_state) {

  global $language;

  $account = $form_state['values']['account'];

  // Mail one time login URL and instructions using current language.

  $mail = _user_mail_notify('password_reset', $account, $language);

  if (!empty($mail)) {

    watchdog('user', 'Password reset instructions mailed to %name at %email.', array('%name' => $account->name, '%email' => $account->mail));

    drupal_set_message(t('Further instructions have been sent to your e-mail address.'));

  }

  $form_state['redirect'] = 'user';

  return;

}

/**

 * Menu callback; process one time login link and redirects to the user page on success.

 */

function user_pass_reset($form, &$form_state, $uid, $timestamp, $hashed_pass, $action = NULL) {

  global $user;

  // When processing the one-time login link, we have to make sure that a user

  // isn't already logged in.

  if ($user->uid) {

    // The existing user is already logged in. Log them out and reload the

    // current page so the password reset process can continue.

    if ($user->uid == $uid) {

      // Preserve the current destination (if any) and ensure the redirect goes

      // back to the current page; any custom destination set in

      // hook_user_logout() and intended for regular logouts would not be

      // appropriate here.

      $destination = array();

      if (isset($_GET['destination'])) {

        $destination = drupal_get_destination();

      }

      user_logout_current_user();

      unset($_GET['destination']);

      drupal_goto(current_path(), array('query' => drupal_get_query_parameters() + $destination));

    }

    // A different user is already logged in on the computer.

    else {

      $reset_link_account = user_load($uid);

      if (!empty($reset_link_account)) {

        drupal_set_message(t('Another user (%other_user) is already logged into the site on this computer, but you tried to use a one-time link for user %resetting_user. Please <a href="!logout">logout</a> and try using the link again.',

          array('%other_user' => $user->name, '%resetting_user' => $reset_link_account->name, '!logout' => url('user/logout'))), 'warning');

      } else {

        // Invalid one-time link specifies an unknown user.

        drupal_set_message(t('The one-time login link you clicked is invalid.'), 'error');

      }

      drupal_goto();

    }

  }

  else {

    // Time out, in seconds, until login URL expires. Defaults to 24 hours =

    // 86400 seconds.

    $timeout = variable_get('user_password_reset_timeout', 86400);

    $current = REQUEST_TIME;

    // Some redundant checks for extra security ?

    $users = user_load_multiple(array($uid), array('status' => '1'));

    if ($timestamp <= $current && $account = reset($users)) {

      // No time out for first time login.

      if ($account->login && $current - $timestamp > $timeout) {

        drupal_set_message(t('You have tried to use a one-time login link that has expired. Please request a new one using the form below.'), 'error');

        drupal_goto('user/password');

      }

      elseif ($account->uid && $timestamp >= $account->login && $timestamp <= $current && $hashed_pass == user_pass_rehash($account->pass, $timestamp, $account->login, $account->uid)) {

        // First stage is a confirmation form, then login

        if ($action == 'login') {

          // Set the new user.

          $user = $account;

          // user_login_finalize() also updates the login timestamp of the

          // user, which invalidates further use of the one-time login link.

          user_login_finalize();

          watchdog('user', 'User %name used one-time login link at time %timestamp.', array('%name' => $account->name, '%timestamp' => $timestamp));

          drupal_set_message(t('You have just used your one-time login link. It is no longer necessary to use this link to log in. Please change your password.'));

          // Let the user's password be changed without the current password check.

          $token = drupal_random_key();

          $_SESSION['pass_reset_' . $user->uid] = $token;

          drupal_goto('user/' . $user->uid . '/edit', array('query' => array('pass-reset-token' => $token)));

        }

        else {

          $form['message'] = array('#markup' => t('<p>This is a one-time login for %user_name and will expire on %expiration_date.</p><p>Click on this button to log in to the site and change your password.</p>', array('%user_name' => $account->name, '%expiration_date' => format_date($timestamp + $timeout))));

          $form['help'] = array('#markup' => '<p>' . t('This login can be used only once.') . '</p>');

          $form['actions'] = array('#type' => 'actions');

          $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Log in'));

          $form['#action'] = url("user/reset/$uid/$timestamp/$hashed_pass/login");

          return $form;

        }

      }

      else {

        drupal_set_message(t('You have tried to use a one-time login link that has either been used or is no longer valid. Please request a new one using the form below.'), 'error');

        drupal_goto('user/password');

      }

    }

    else {

      // Deny access, no more clues.

      // Everything will be in the watchdog's URL for the administrator to check.

      drupal_access_denied();

      drupal_exit();

    }

  }

}

/**

 * Menu callback; logs the current user out, and redirects to the home page.

 */

function user_logout() {

  user_logout_current_user();

  drupal_goto();

}

/**

 * Logs the current user out.

 */

function user_logout_current_user() {

  global $user;

  watchdog('user', 'Session closed for %name.', array('%name' => $user->name));

  module_invoke_all('user_logout', $user);

  // Destroy the current session, and reset $user to the anonymous user.

  session_destroy();

}

/**

 * Process variables for user-profile.tpl.php.

 *

 * @param array $variables

 *   An associative array containing:

 *   - elements: An associative array containing the user information and any

 *     fields attached to the user. Properties used:

 *     - #account: The user account of the profile being viewed.

 *

 * @see user-profile.tpl.php

 */

function template_preprocess_user_profile(&$variables) {

  $account = $variables['elements']['#account'];

  // Helpful $user_profile variable for templates.

  foreach (element_children($variables['elements']) as $key) {

    $variables['user_profile'][$key] = $variables['elements'][$key];

  }

  // Preprocess fields.

  field_attach_preprocess('user', $account, $variables['elements'], $variables);

}

/**

 * Process variables for user-profile-item.tpl.php.

 *

 * The $variables array contains the following arguments:

 * - $element

 *

 * @see user-profile-item.tpl.php

 */

function template_preprocess_user_profile_item(&$variables) {

  $variables['title'] = $variables['element']['#title'];

  $variables['value'] = $variables['element']['#markup'];

  $variables['attributes'] = '';

  if (isset($variables['element']['#attributes'])) {

    $variables['attributes'] = drupal_attributes($variables['element']['#attributes']);

  }

}

/**

 * Process variables for user-profile-category.tpl.php.

 *

 * The $variables array contains the following arguments:

 * - $element

 *

 * @see user-profile-category.tpl.php

 */

function template_preprocess_user_profile_category(&$variables) {

  $variables['title'] = check_plain($variables['element']['#title']);

  $variables['profile_items'] = $variables['element']['#children'];

  $variables['attributes'] = '';

  if (isset($variables['element']['#attributes'])) {

    $variables['attributes'] = drupal_attributes($variables['element']['#attributes']);

  }

}

/**

 * Form builder; edit a user account or one of their profile categories.

 *

 * @ingroup forms

 * @see user_account_form()

 * @see user_account_form_validate()

 * @see user_profile_form_validate()

 * @see user_profile_form_submit()

 * @see user_cancel_confirm_form_submit()

 */

function user_profile_form($form, &$form_state, $account, $category = 'account') {

  global $user;

  // During initial form build, add the entity to the form state for use during

  // form building and processing. During a rebuild, use what is in the form

  // state.

  if (!isset($form_state['user'])) {

    $form_state['user'] = $account;

  }

  else {

    $account = $form_state['user'];

  }

  // @todo Legacy support. Modules are encouraged to access the entity using

  //   $form_state. Remove in Drupal 8.

  $form['#user'] = $account;

  $form['#user_category'] = $category;

  if ($category == 'account') {

    user_account_form($form, $form_state);

    // Attach field widgets.

    $langcode = entity_language('user', $account);

    field_attach_form('user', $account, $form, $form_state, $langcode);

  }

  $form['actions'] = array('#type' => 'actions');

  $form['actions']['submit'] = array(

    '#type' => 'submit',

    '#value' => t('Save'),

  );

  if ($category == 'account') {

    $form['actions']['cancel'] = array(

      '#type' => 'submit',

      '#value' => t('Cancel account'),

      '#submit' => array('user_edit_cancel_submit'),

      '#access' => $account->uid > 1 && (($account->uid == $user->uid && user_access('cancel account')) || user_access('administer users')),

    );

  }

  $form['#validate'][] = 'user_profile_form_validate';

  // Add the final user profile form submit handler.

  $form['#submit'][] = 'user_profile_form_submit';

  return $form;

}

/**

 * Form validation handler for user_profile_form().

 *

 * @see user_profile_form_submit()

 */

function user_profile_form_validate($form, &$form_state) {

  entity_form_field_validate('user', $form, $form_state);

}

/**

 * Form submission handler for user_profile_form().

 *

 * @see user_profile_form_validate()

 */

function user_profile_form_submit($form, &$form_state) {

  $account = $form_state['user'];

  $category = $form['#user_category'];

  // Remove unneeded values.

  form_state_values_clean($form_state);

  // Before updating the account entity, keep an unchanged copy for use with

  // user_save() later. This is necessary for modules implementing the user

  // hooks to be able to react on changes by comparing the values of $account

  // and $edit.

  $account_unchanged = clone $account;

  entity_form_submit_build_entity('user', $account, $form, $form_state);

  // Populate $edit with the properties of $account, which have been edited on

  // this form by taking over all values, which appear in the form values too.

  $edit = array_intersect_key((array) $account, $form_state['values']);

  user_save($account_unchanged, $edit, $category);

  $form_state['values']['uid'] = $account->uid;

  if ($category == 'account' && !empty($edit['pass'])) {

    // Remove the password reset tag since a new password was saved.

    unset($_SESSION['pass_reset_'. $account->uid]);

  }

  // Clear the page cache because pages can contain usernames and/or profile information:

  cache_clear_all();

  drupal_set_message(t('The changes have been saved.'));

}

/**

 * Submit function for the 'Cancel account' button on the user edit form.

 */

function user_edit_cancel_submit($form, &$form_state) {

  $destination = array();

  if (isset($_GET['destination'])) {

    $destination = drupal_get_destination();

    unset($_GET['destination']);

  }

  // Note: We redirect from user/uid/edit to user/uid/cancel to make the tabs disappear.

  $form_state['redirect'] = array("user/" . $form['#user']->uid . "/cancel", array('query' => $destination));

}

/**

 * Form builder; confirm form for cancelling user account.

 *

 * @ingroup forms

 * @see user_edit_cancel_submit()

 */

function user_cancel_confirm_form($form, &$form_state, $account) {

  global $user;

  $form['_account'] = array('#type' => 'value', '#value' => $account);

  // Display account cancellation method selection, if allowed.

  $admin_access = user_access('administer users');

  $can_select_method = $admin_access || user_access('select account cancellation method');

  $form['user_cancel_method'] = array(

    '#type' => 'item',

    '#title' => ($account->uid == $user->uid ? t('When cancelling your account') : t('When cancelling the account')),

    '#access' => $can_select_method,

  );

  $form['user_cancel_method'] += user_cancel_methods();

  // Allow user administrators to skip the account cancellation confirmation

  // mail (by default), as long as they do not attempt to cancel their own

  // account.

  $override_access = $admin_access && ($account->uid != $user->uid);

  $form['user_cancel_confirm'] = array(

    '#type' => 'checkbox',

    '#title' => t('Require e-mail confirmation to cancel account.'),