class-jeg-account-social.php

<?php

use LinkedIn\LinkedIn;

Class Jeg_Account_Social
{
    private static $instance;

    // facebook integration
    private $fb_app_id;
    private $fb_app_secret;
    private $fb_graph_version;

    // google integration
    private $google_client_id;
    private $google_secret;
    private $google_apps_name;

    // linked in integration
    private $linkedin_app_id;
    private $linkedin_app_secret;

    public static function getInstance()
    {
        if (null === static::$instance)
        {
            static::$instance = new static();
        }
        return static::$instance;
    }

    public function __construct()
    {
        $this->includes();
        $this->hook();
    }

    public function includes()
    {
        include_once( JOBPLANET_PLUGIN_DIR . 'external/facebook-sdk-v5/autoload.php' );
        include_once( JOBPLANET_PLUGIN_DIR . 'external/google-api-php-client/src/Google/autoload.php' );
        include_once( JOBPLANET_PLUGIN_DIR . 'external/LinkedIn/LinkedIn.php' );
    }

    public function hook()
    {
        // social
        add_action('init', array(&$this, 'init_social_integration'));
        add_action('init', array( &$this , 'add_social_endpoint' ));
        add_action('parse_request', array(&$this, 'social_parse_request'));
        add_filter('query_vars', array( &$this , 'social_query_vars' ));

        add_action('jeg_login_social', array(&$this, 'print_login_social'));
        add_action('jeg_register_social', array(&$this, 'print_register_social'));

        add_filter('jeg_social_url_filter', array(&$this, 'social_url_filter'), 10, 2);
    }

    public function print_register_social()
    {
        $showwhere = vp_option('joption.show_social_login');
        if($showwhere === 'register' || $showwhere === 'both') {

            if(vp_option('joption.enable_fb_register')) {
            ?>
                <p><a href="<?php echo esc_url($this->facebook_login_url()); ?>" class="btn btn-fb btn-theme btn-block"><i class="fa fa-facebook pull-left bordered-right"></i> <?php _e('Register with Facebook', 'jobplanet-plugin'); ?></a></p>
            <?php
            }

            if(vp_option('joption.enable_google_register')) {
            ?>
                <p><a href="<?php echo esc_url($this->google_login_url()); ?>" class="btn btn-danger btn-theme btn-block"><i class="fa fa-google-plus pull-left bordered-right"></i> <?php _e('Register with Google', 'jobplanet-plugin'); ?></a></p>
            <?php
            }

            if(vp_option('joption.enable_linkedin_register')) {
            ?>
                <p><a href="<?php echo esc_url($this->linkedin_login_url()); ?>" class="btn btn-linkedin btn-theme btn-block"><i class="fa fa-linkedin pull-left bordered-right"></i> <?php _e('Register with Linked In', 'jobplanet-plugin'); ?></a></p>
            <?php
            }

        }

        if($showwhere === 'register' && (vp_option('joption.enable_fb_register') || vp_option('joption.enable_google_register') || vp_option('joption.enable_linkedin_register'))) {
            ?>
            <div class="white-space-10"></div>
            <p class="text-center"><span class="span-line"><?php _e('OR', 'jobplanet-plugin'); ?></span></p>
            <?php
        }

        if($showwhere === 'both' && (vp_option('joption.enable_fb_register') || vp_option('joption.enable_google_register') || vp_option('joption.enable_linkedin_register'))) {
            ?>
            <div class="white-space-10"></div>
            <p class="text-center"><span class="span-line"><?php _e('OR', 'jobplanet-plugin'); ?></span></p>
            <?php
        }
    }

    public function print_login_social()
    {
        $showwhere = vp_option('joption.show_social_login');
        if($showwhere === 'login' || $showwhere === 'both') {

            if(vp_option('joption.enable_fb_register')) {
            ?>
                <p><a href="<?php echo esc_url($this->facebook_login_url()); ?>" class="btn btn-fb btn-theme btn-block"><i class="fa fa-facebook pull-left bordered-right"></i> <?php _e('Login with Facebook', 'jobplanet-plugin'); ?></a></p>
            <?php
            }

            if(vp_option('joption.enable_google_register')) {
            ?>
                <p><a href="<?php echo esc_url($this->google_login_url()); ?>" class="btn btn-danger btn-theme btn-block"><i class="fa fa-google-plus pull-left bordered-right"></i> <?php _e('Login with Google', 'jobplanet-plugin'); ?></a></p>
            <?php
            }

            if(vp_option('joption.enable_linkedin_register')) {
            ?>
                <p><a href="<?php echo esc_url($this->linkedin_login_url()); ?>" class="btn btn-linkedin btn-theme btn-block"><i class="fa fa-linkedin pull-left bordered-right"></i> <?php _e('Login with Linked In', 'jobplanet-plugin'); ?></a></p>
            <?php
            }
        }

        if(vp_option('joption.enable_fb_register') || vp_option('joption.enable_google_register') || vp_option('joption.enable_linkedin_register')) {
            ?>
                <div class="white-space-10"></div>
                <p class="text-center"><span class="span-line"><?php _e('OR', 'jobplanet-plugin'); ?></span></p>
            <?php
        }
    }

    public function init_social_integration()
    {
        if(vp_option('joption.enable_fb_register')) {
            $this->fb_app_id                = vp_option('joption.fb_app_id');
            $this->fb_app_secret            = vp_option('joption.fb_app_secret');
            $this->fb_graph_version         = 'v2.2';
        }

        if(vp_option('joption.enable_google_register')) {
            $this->google_client_id         = vp_option('joption.google_client_id');
            $this->google_secret            = vp_option('joption.google_secret');
            $this->google_apps_name          = vp_option('joption.google_apps_name');
        }

        if(vp_option('joption.enable_linkedin_register')) {
            $this->linkedin_app_id          = vp_option('joption.linkedin_app_id');
            $this->linkedin_app_secret      = vp_option('joption.linkedin_app_secret');
        }

    }

    public function add_social_endpoint()
    {
        add_rewrite_rule( '^social-callback/([^/]*)/?', 'index.php?social-callback=$matches[1]', 'top' );
    }

    public function social_query_vars($vars)
    {
        $vars[] = 'social-callback';
        return $vars;
    }

    public function social_parse_request($wp)
    {
        if (array_key_exists('social-callback', $wp->query_vars))
        {
            switch($wp->query_vars['social-callback'])
            {
                case "facebook" :
                    $this->facebook_login();
                    break;
                case "google" :
                    $this->google_login();
                    break;
                case "linkedin" :
                    $this->linkedin_login();
                    break;
            }
        }
    }

    public function linkedin_login()
    {
        $linkedin = new LinkedIn(array(
            'api_key' => $this->linkedin_app_id,
            'api_secret' => $this->linkedin_app_secret,
            'callback_url' => $this->social_callback_url('linkedin')
        ));

        try {
            $token = $linkedin->getAccessToken($_REQUEST['code']);

            if(!isset($token))
            {
                throw new Exception( '<strong>' . esc_html(__( 'Error', 'jobplanet-plugin' )) . ':</strong> ' . esc_html(__( 'Failed to get Linked in access token', 'jobplanet-plugin' )) );
            }

            $info = $linkedin->get('/people/~:(email-address,first-name,last-name)');
            $user_email = $info['emailAddress'];

            if(email_exists($user_email))
            {
                $this->log_user_in_social($user_email);
            } else
            {
                $this->register_user_social(array(
                    'email'             => $user_email,
                    'first_name'        => $info["firstName"],
                    'last_name'         => $info["lastName"]
                ));
            }
        } catch (Exception $e )
        {
            jeg_flash_message('message', $e->getMessage(), 'alert-danger');
        }

        wp_redirect(  jeg_get_account_url() );
        exit;
    }

    public function facebook_login()
    {
        $fb = new Facebook\Facebook(array(
            'app_id' => $this->fb_app_id,
            'app_secret' => $this->fb_app_secret,
            'default_graph_version' => $this->fb_graph_version,
        ));
        $helper = $fb->getRedirectLoginHelper();

        try {
            $accessToken = $helper->getAccessToken();

            if (! isset($accessToken))
            {
                if ($helper->getError())
                {
                    header('HTTP/1.0 401 Unauthorized');
                    echo "Error: " . $helper->getError() . "\n";
                    echo "Error Code: " . $helper->getErrorCode() . "\n";
                    echo "Error Reason: " . $helper->getErrorReason() . "\n";
                    echo "Error Description: " . $helper->getErrorDescription() . "\n";
                } else
                {
                    header('HTTP/1.0 400 Bad Request');
                    echo 'Bad request';
                }
                exit;
            }

            $response = $fb->get('/me?fields=id,name,email,first_name,last_name', $accessToken->getValue());
            $user = $response->getGraphUser();
            $user_email = $user['email'];

            if(email_exists($user_email))
            { // user exist
                $this->log_user_in_social($user_email);
            } else
            { // user not exist
                $this->register_user_social(array(
                    'email'             => $user_email,
                    'first_name'        => $user["first_name"],
                    'last_name'         => $user["last_name"]
                ));
            }
        } catch (Exception $e )
        {
            if ($e instanceof Facebook\Exceptions\FacebookResponseException)
            {
                jeg_flash_message('message', 'Graph returned an error: ' . $e->getMessage(), 'alert-danger');
            } else if ($e instanceof Facebook\Exceptions\FacebookSDKException)
            {
                jeg_flash_message('message', 'Facebook SDK returned an error : ' . $e->getMessage(), 'alert-danger');
            } else
            {
                jeg_flash_message('message', $e->getMessage(), 'alert-danger');
            }
        }

        wp_redirect(  jeg_get_account_url() );
        exit;
    }

    public function google_login()
    {
        $client = new Google_Client();
        $client->setApplicationName( $this->google_apps_name );
        $client->setClientId( $this->google_client_id );
        $client->setClientSecret( $this->google_secret );
        $client->setRedirectUri( $this->social_callback_url('google') );

        try {

            if(!isset($_GET['code']))
            {
                throw new Exception( '<strong>' . esc_html(__( 'Error', 'jobplanet-plugin' )) . ':</strong> ' . esc_html(__( 'Failed to get Google Code', 'jobplanet-plugin' )) );
            } else
            {
                if (!isset($_GET['code']))
                {
                    header('HTTP/1.0 400 Bad Request');
                    echo 'Bad request';
                    exit;
                }

                // get access token
                $client->authenticate($_GET['code']);
                $access_token = $client->getAccessToken();
                $client->setAccessToken($access_token);

                // use access token to get detail user
                $plus = new Google_Service_Plus($client);
                $user = $plus->people->get("me");

                $user_email = $user['emails'][0]['value'];

                if(email_exists($user_email))
                { // user exist
                    $this->log_user_in_social($user_email);
                } else
                { // user not exist
                    $this->register_user_social(array(
                        'email'             => $user_email,
                        'first_name'        => $user['name']['givenName'],
                        'last_name'         => $user['name']['familyName']
                    ));
                }
            }
        } catch (Exception $e )
        {
            jeg_flash_message('message', $e->getMessage(), 'alert-danger');
        }

        wp_redirect(  jeg_get_account_url() );
        exit;
    }

    public function log_user_in_social ($user_email)
    {
        // get user detail
        $userdetail = get_user_by('email', $user_email);

        // log the new user in
        wp_set_auth_cookie($userdetail->ID, true, is_ssl());
        wp_set_current_user($userdetail->ID);
    }

    public function register_user_social($user)
    {
        $generated_password = wp_generate_password();
        $default_member_role = vp_option('joption.default_role_social', Jeg_Account::APPLICANT);
        $new_customer = wp_insert_user(array(
            'user_login'        => $user['email'],
            'user_pass'         => $generated_password,
            'user_email'        => $user['email'],
            'first_name'        => $user["first_name"],
            'last_name'         => $user["last_name"],
            'user_registered'   => date('Y-m-d H:i:s'),
            'role'              => $default_member_role
        ));

        if($default_member_role === Jeg_Account::APPLICANT) {
            jeg_flash_message('message',sprintf(
                wp_kses(__("Thank you for registering <strong>%s</strong>. You can start your job search or create your resume now.", 'jobplanet-plugin'), jeg_allow_strong()),
                    $user['email']), 'alert-success');
        } else if($default_member_role === Jeg_Account::EMPLOYER) {
            jeg_flash_message('message', sprintf(
                wp_kses(__("Thank you for registering <strong>%s</strong>. You can start posting jobs or search for potential candidates now.", 'jobplanet-plugin'), jeg_allow_strong()),
                    $user['email']), 'alert-success');
        }

        if ( is_wp_error( $new_customer ) )
        {
            throw new Exception( $new_customer->get_error_message() );
        } else
        {
            // send an email to the admin alerting them of the registration
            wp_new_user_notification($new_customer, $generated_password);

            jeg_send_email(
                esc_html(__('Registration for {site_title}', 'jobplanet-plugin')),
                'email/register-social-notification',
                $user['email'],
                array(
                    'email' => $user['email'],
                    'password' => $generated_password
                )
            );

            // log the new user in
            wp_set_auth_cookie( $new_customer, true, is_ssl() );
            wp_set_current_user($new_customer, $user['email']);
        }
    }


    public function linkedin_login_url()
    {
        $linkedin = new LinkedIn(array(
            'api_key' => $this->linkedin_app_id,
            'api_secret' => $this->linkedin_app_secret,
            'callback_url' => $this->social_callback_url('linkedin')
        ));

        $authUrl = $linkedin->getLoginUrl(
            array(
                LinkedIn::SCOPE_BASIC_PROFILE,
                LinkedIn::SCOPE_EMAIL_ADDRESS
            )
        );

        return $authUrl;
    }

    public function facebook_login_url ()
    {
        $fb = new Facebook\Facebook(array(
            'app_id' => $this->fb_app_id,
            'app_secret' => $this->fb_app_secret,
            'default_graph_version' => $this->fb_graph_version,
        ));

        $helper = $fb->getRedirectLoginHelper();
        $loginUrl = $helper->getLoginUrl($this->social_callback_url('facebook'), array('email'));
        return $loginUrl;
    }

    public function google_login_url ()
    {
        $client = new Google_Client();
        $client->setApplicationName($this->google_apps_name);
        $client->setClientId($this->google_client_id);
        $client->setClientSecret($this->google_secret);
        $client->addScope("https://www.googleapis.com/auth/userinfo.profile");
        $client->addScope("https://www.googleapis.com/auth/userinfo.email");

        $client->setRedirectUri($this->social_callback_url('google'));
        return $client->createAuthUrl();
    }

    public function social_callback_url($social)
    {
        if ( get_option( 'permalink_structure' ) ) {
            $url = home_url() . '/social-callback/' . $social;
        } else {
            $url = add_query_arg( array( 'social-callback' => $social ), home_url() );
        }

        return $url;
    }

    public function social_url_filter($value, $social)
    {
        return $this->social_callback_url($social);
    }
}

Jeg_Account_Social::getInstance();