<?php
if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class LinkedIn  
{
    protected $app_id;
    protected $app_secret;
    protected $callback;
    protected $csrf;
    protected $scopes;
    protected $ssl;
    protected $accessToken;
    public function __construct()
    {
        $this->app_id = '86i3o03b7tzgsx';
        $this->app_secret = 'iAz5qVQiN56cu79f';
        $this->scopes =  "r_liteprofile r_emailaddress";
        $this->csrf = random_int(111111,99999999999);
        $this->callback = "http://52.229.31.187/dev";
        $this->ssl = false;

        // $params->app_id = '86i3o03b7tzgsx';
        // $params->app_secret = 'iAz5qVQiN56cu79f';
        // $params->scopes =  "r_liteprofile r_basicprofile r_emailaddress";
        // $params->csrf = random_int(111111,99999999999);
        // $params->callback = "http://localhost/hospital-management/admin/login";
        // $params->ssl = false;
    }

    public function getAuthUrl($callback="")
    {
        if($callback != "")
        {
            $this->callback = $callback;
        }
        // $this->callback = $callback;
        $_SESSION['linkedincsrf']  = $this->csrf;
        return "https://www.linkedin.com/oauth/v2/authorization?response_type=code&client_id=". $this->app_id . "&redirect_uri=".$this->callback ."&state=". $this->csrf."&scope=". $this->scopes ;
    }
    
    public function getAccessToken($code)
    {
        $url = "https://www.linkedin.com/oauth/v2/accessToken";
        $params = [
            'client_id' => $this->app_id,
            'client_secret' => $this->app_secret,
            'redirect_uri' => $this->callback,
            'code' => $code,
            'grant_type' => 'authorization_code',
        ];
        $response = $this->curl($url,http_build_query($params), "application/x-www-form-urlencoded");
        $accessToken = json_decode($response)->access_token;
        $this->accessToken = $accessToken;
        return $accessToken;
    }
    public function getPerson()
    {
        $url = "https://api.linkedin.com/v2/me?projection=(id,firstName,localizedFirstName,lastName,localizedLastName,maidenName,email,localizedMaidenName,headline,localizedHeadline,websites,vanityName,profilePicture(displayImage~:playableStreams))&oauth2_access_token=" . $this->accessToken;
        $params = [];
        $response = $this->curl($url,http_build_query($params), "application/x-www-form-urlencoded", false);
        $person = json_decode($response);
        return $person;
    }
    public function getEmail()
    {
        $url = "https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))&oauth2_access_token=" . $this->accessToken;
        $params = [];
        $response = $this->curl($url,http_build_query($params), "application/x-www-form-urlencoded", false);
        $emailObject = json_decode($response);
        return $emailObject;
    }
    protected function curl($url, $parameters, $content_type, $post = true)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, $this->ssl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        if ($post) {
            curl_setopt($ch, CURLOPT_POSTFIELDS, $parameters);
        }
        curl_setopt($ch, CURLOPT_POST, $post);
        $headers = [];
        $headers[] = "Content-Type: {$content_type}";
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        $result = curl_exec($ch);
        return $result;
    }
   
}