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<?php 
/**
 * Instagram PHP implementation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 /**
 *
 * This script servers two main functionalities
 * If user has not been autheticated by Instagram then it will redirect user to Instagram server
 * Once Instagram authrizes user then it will get code returned by instagram, get Access Token and save it into the session
 *
 */
 
 session_start();
 
 require_once 'config.php';
 require_once 'Class.Instagram.php';
 
 
 if(isset($_GET['error'])&&$_GET['error']!="") {
 
 echo "You Need to grant access to the application in order to continue!";
 exit;
 }
 
 if(isset($_GET['code'])&&$_GET['code']!="") {
 
 /**
 * InstaGram redirected to our URL with Code
 * So use this code to get Access Token from InstaGram for further opeartions
 */
 $instgram  = new Instagram();
 $accesstoken = $instgram->getAccessTokenFromCode($_GET['code']);
 
 if($accesstoken!="") {
 
 $_SESSION['AccessToken'] = $accesstoken;
 $_SESSION['UserId']      = $instgram->getUserId();
 $_SESSION['FullName']     = $instgram->getUserFullName();
 $_SESSION['Thumbnail']      = $instgram->getUserThumb();
 
 header("Location: index.php");
 exit;
 
 }
 
 }
 
 /**
 * If op is set to "getauth" it means user has not been authorized so we need to redirect user to Instagram server
 * and get authorization code
 *
 */
 if(isset($_GET['op']) && $_GET['op']=="getauth") {
 
 header("Location: ".sprintf($urlconfig['authorization_url'],$appconfig['client_id'],$appconfig['redirect_url']));
 exit;
 
 }
 
 
 
 
 
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