code_login.module

<?php

/**
 * @file
 * Simple One-input login form with Code generator.
 */

define('CODE_LOGIN_ADMIN_PATH', 'admin/config/people/code-login');
define('CODE_LOGIN_TABLE', 'login_codes');


/**
 * Implements hook_init().
 */
function code_login_init() {

  $types = array(
      1 => '1 Week',
      2 => '2 Weeks',
      3 => '1 Month',
      4 => '3 Months',
      5 => '6 Months',
      6 => '1 Year',
      7 => 'Unlimited',
    );

  variable_set('code_login_defined_types', $types);
}

/**
 * Implements hook_menu().
 */
function code_login_menu() {

  $login_url = variable_get('custom_login_page_path') ? variable_get('custom_login_page_path') : 'code-login';

  $items['admin/code-login'] = array(
    'title' => 'Code Logins',
    'description' => 'Administer Login Codes',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('code_login_form'),
    'access arguments' => array('administer code login'),
    'type' => MENU_NORMAL_ITEM,
    'weight' => 0,
    'file' => 'code_login.admin.inc',
  );
  $items[$login_url] = array(
    'title callback' => 'custom_login_title_callback',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('code_custom_login_form'),
    'access callback' => 'user_is_anonymous',
    'type' => MENU_CALLBACK,
    'file' => 'code_login.pages.inc',
  );
  $items['admin/config/people/code-login/%/edit'] = array(
    'title callback' => 'code_login_edit_title_callback',
    'title arguments' => array(4),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('code_login_edit_form', 4),
    'access arguments' => array('administer code login'),
    'type' => MENU_CALLBACK,
    'file' => 'code_login.admin.inc',
  );
  $items['admin/config/people/code-login/%/delete'] = array(
    'title callback' => 'code_login_delete_title_callback',
    'title arguments' => array(4),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('code_login_delete_form', 4),
    'access arguments' => array('administer code login'),
    'type' => MENU_CALLBACK,
    'file' => 'code_login.admin.inc',
  );
  return $items;
}

function custom_login_title_callback() {
  $title = variable_get('custom_login_page_title') ? variable_get('custom_login_page_title') : 'Custom Login';
  return $title;
}

function code_login_edit_title_callback($code_id) {
  $title = 'Edit code ' . $code_id;
  return $title;
}

function code_login_delete_title_callback($code_id) {
  $title = 'Delete code ' . $code_id;
  return $title;
}

function code_login_load($code_id) {

  $query = db_select('login_codes', 'c');
  $query->condition('cid', $code_id, '=');
  $query->join('users', 'u', 'c.uid = u.uid');

  $query
  ->fields('c', array('cid', 'uid', 'code', 'code_type', 'creation', 'first_login', 'expiration'))
  ->fields('u', array('name', 'created', 'mail', 'access', 'login', 'data'))
  ->orderBy('u.created', 'DESC');

  return $query->execute()->fetchObject();


}

function code_login_update($record) {

  drupal_write_record(CODE_LOGIN_TABLE, $record, 'cid');

}

function code_login_user_custom_delete($code_id) {

  $code = code_login_load($code_id);

  db_delete('login_codes')
    ->condition('cid', $code_id, '=')
    ->execute();

  $uid = $code->uid;
  user_delete($uid);

}

function code_login_user_delete($account) {

  db_delete('login_codes')
    ->condition('uid', $account->uid)
    ->execute();

}

function code_login_user_login(&$edit, $account) {

  //Update login_codes table with first login and expiration

  $code_user = db_select('login_codes', 'c')
    ->fields('c', array('uid', 'code_type'))
    ->condition('uid', $account->uid, '=')
    ->execute()
    ->fetchAll();


  $types = array(
    1 => '1 week',
    2 => '2 weeks',
    3 => '1 month',
    4 => '3 months',
    5 => '6 months',
    6 => '1 year',
    7 => '20 years',
  );

  if (!empty($code_user)) {

    if ($account->access == 0) {
      $date = date_create(date('d-m-Y',$account->login));
      date_add($date, date_interval_create_from_date_string($types[$code_user[0]->code_type]));
      $hour = date('H',$account->login);
      $min = date('i',$account->login);
      $sec = date('s',$account->login);
      date_time_set($date, $hour, $min, $sec);
      $formatted_date = date_format($date, 'd-m-Y H:i:s');
      $expiration = strtotime($formatted_date);
      $row_update = db_update('login_codes')
        ->fields(array('first_login' => $account->login, 'expiration' => $expiration))
        ->condition('uid', $account->uid , '=')
        ->execute();
    }
  }
}

/**
 * Implements hook_permission().
 */
function code_login_permission() {
  return array(
    'administer code login' => array(
      'title' => t('Administer Code Login'),
    )
  );
}