user_login_redirect.module

<?php
/**
 * @file
 * Main file of user_login_redirect module.
 */

/**
 * Implements hook_help().
 */
function user_login_redirect_help($path, $arg) {
  switch ($path) {
  case 'admin/help#user_login_redirect':
    return '<p>' . t('This module provides redirects on login by role') . '</p>';
  }
}

/**
 * Implements hook_menu().
 */
function user_login_redirect_menu() {
  $items = array();
  $items['admin/config/people/user-login-redirect'] = array(
    'title' => 'User login redirect Config',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('user_login_redirect_config_form'),
    'access callback' => 'user_access',
    'access arguments' => array('configure user login redirect'),
  );
  return $items;
}

/**
 * Implements hook_permission().
 */
function user_login_redirect_permission() {
  $permissions['configure user login redirect'] = array(
    'title' => t('Configure settings for user login redirect'),
    'description' => t('Access to configure user login redirect'),
    'restrict access' => TRUE,
  );
  return $permissions;
}

/**
 * Generates config form for this module.
 */
function user_login_redirect_config_form($form, &$form_state) {
  $roles = user_roles(TRUE);
  foreach ($roles as $rid => $role_name) {
    $form['user_login_redirect_weight_' . $rid] = array(
      '#type' => 'weight',
      '#title' => t('Weight for role @role_name',
      array('@role_name' => $role_name)),
      '#description' => t('The lower weight, the more importance the role will have'),
      '#default_value' => variable_get('user_login_redirect_weight_' . $rid, 0),
    );
    $form['user_login_redirect_path_' . $rid] = array(
      '#type' => 'textfield',
      '#title' => t('Redirect path for role @role_name',
      array('@role_name' => $role_name)),
      '#description' => t('The path to redirect this role.'),
      '#default_value' => variable_get('user_login_redirect_path_' . $rid, ''),
    );
  }
  return system_settings_form($form);
}

/**
 * Validate function for my config form.
 */
function user_login_redirect_config_form_validate($form, &$form_state) {
  $values = $form_state['values'];
  $roles = user_roles(TRUE);
  foreach ($roles as $rid => $role_name) {
    if ($values['user_login_redirect_path_' . $rid] &&
      !drupal_valid_path($values['user_login_redirect_path_' . $rid], TRUE)) {
        form_set_error('user_login_redirect_path_' . $rid . '][',
          t('You must set a valid url for the role @role_name',
          array('@role_name' => $role_name)));
      }
  }
}

/**
 * Implements hook_user_login().
 */
function user_login_redirect_user_login(&$edit, $account) {
  $redirect_roles = array();
  foreach ($account->roles as $role_id => $role_name) {
    if ($path = variable_get('user_login_redirect_path_' . $role_id, '')) {
      $redirect_roles[$role_id] = array(
        'weight' => variable_get('user_login_redirect_weight_' . $role_id, 0),
        'path' => $path,
      );
    }
  }
  $min_weight = FALSE;
  $redirect_path = '';

  foreach ($redirect_roles as $role_id => $value) {
    if ($min_weight === FALSE || $min_weight > $value['weight']) {
      $min_weight = $value['weight'];
      $redirect_path = $value['path'];
    }
  }

  $edit['redirect'] = $redirect_path;
  unset($_GET['destination']);
  drupal_static_reset('drupal_get_destination');
}