linkedin_auth.module in LinkedIn Integration 6

Implement LinkedIn Authentication service for user login

File

linkedin_auth/linkedin_auth.module

<?php

/**
 * @file
 * Implement LinkedIn Authentication service for user login
 */

/**
 * Implementation of hook_init()
 */
function linkedin_auth_init() {
  module_load_include('pages.inc', 'linkedin_auth');
  drupal_add_css(drupal_get_path('module', 'linkedin_auth') . '/linkedin_auth.css', 'module');
}

/*
 * Implementation of hook_menu
 */
function linkedin_auth_menu() {
  $items = array();

  //callback for oauth token request on linkedin API.
  $items['linkedin/login/%user'] = array(
    'type' => MENU_CALLBACK,
    'page callback' => 'linkedin_access_token',
    'page arguments' => array(
      2,
    ),
    'access callback' => 'linkedin_auth_token_access',
    'access arguments' => array(
      2,
    ),
    'file' => 'linkedin.inc',
    'file path' => drupal_get_path('module', 'linkedin'),
  );

  //register new user if no account linked
  $items['linkedin/register/create'] = array(
    'page callback' => 'drupal_get_form',
    'page arguments' => array(
      'linkedin_auth_register_page',
    ),
    'access callback' => 'user_is_anonymous',
    'type' => MENU_CALLBACK,
    'file' => 'linkedin_auth.pages.inc',
  );
  return $items;
}

/*
 * Custom access callback for linkedin/login/%user
 */
function linkedin_auth_token_access($account) {
  if (user_is_anonymous()) {
    return TRUE;
  }
  return FALSE;
}

/**
 * Implementation of hook_theme()
 */
function linkedin_auth_theme($existing, $type, $theme, $path) {
  return array(
    'linkedin_auth_display_login_block_button' => array(
      'arguments' => array(
        'path' => NULL,
        'text' => NULL,
      ),
      'file' => 'linkedin_auth.theme.inc',
    ),
  );
}

/**
 * Implementation of hook_form_alter : adds LinkedIn login to the login forms.
 */
function linkedin_auth_form_alter(&$form, $form_state, $form_id) {

  //add login link to the login form
  if ($_SESSION['linkedin_not_linked'] != 1) {
    if ($form_id == 'user_login_block' && variable_get('linkedin_auth_login_link_on_block', 0) == 1) {
      $form['linkedin_auth_links'] = array(
        '#value' => theme('linkedin_auth_display_login_block_button', 'drupal_login_block'),
        '#weight' => 1,
      );
    }
    elseif ($form_id == 'user_login' && variable_get('linkedin_auth_login_link_on_page', 0) == 1) {
      $form['linkedin_auth_links'] = array(
        '#value' => theme('linkedin_auth_display_login_block_button', 'drupal_login_page'),
        '#weight' => 1,
      );
    }
    return $form;
  }
}

/**
 * Implementation of hook_user()
 */
function linkedin_auth_user($op, &$edit, &$account, $category = NULL) {
  switch ($op) {
    case 'view':
      if ($_SESSION['linkedin_not_linked'] == 1) {
        global $user;
        if ($user->uid == $account->uid) {
          unset($_SESSION['linkedin_not_linked']);
          drupal_goto('linkedin/token/' . $account->uid);
        }
      }
  }
}

/**
 * Implementation of hook_block()
 */
function linkedin_auth_block($op = 'list', $delta = 0, $edit = array()) {
  if (variable_get('linkedin_auth_login_block', 0) == 1) {
    switch ($op) {
      case 'list':
        $blocks[0] = array(
          'info' => t('Login using LinkedIn'),
          'title' => t('LinkedIn Login'),
        );
        return $blocks;
        break;
      case 'configure':
        return $form;
        break;
      case 'save':
        break;
      case 'view':
        switch ($delta) {
          case 0:
            if (user_is_anonymous()) {
              $content = theme('linkedin_auth_display_login_block_button', 'linkedin_login_block');
              $block['subject'] = t('Subject');
              $block['content'] = $content;
            }
        }
        return $block;
    }
  }
}

/*
 * Implementation of hook_linkedin_external_login
 */
function linkedin_auth_linkedin_external_login($uid) {
  $login_as = user_load($uid);
  user_external_login($login_as);
  drupal_goto();
}

/*
 * Implementation of hook_linkedin_tie_external_login
 */
function linkedin_auth_linkedin_tie_external_login($uid, $token, $secret) {
  $_SESSION['linkedin_not_linked'] = 1;
  drupal_set_message('No user associated with this LinkedIn account. Please register.');
  if (variable_get('linkedin_auth_bypass_register_checks', 1) == 1) {
    drupal_goto('linkedin/register/create');
  }
  drupal_goto('user/register');
}

Functions

Name	Description
linkedin_auth_block	Implementation of hook_block()
linkedin_auth_form_alter	Implementation of hook_form_alter : adds LinkedIn login to the login forms.
linkedin_auth_init	Implementation of hook_init()
linkedin_auth_linkedin_external_login
linkedin_auth_linkedin_tie_external_login
linkedin_auth_menu
linkedin_auth_theme	Implementation of hook_theme()
linkedin_auth_token_access
linkedin_auth_user	Implementation of hook_user()