Access token grab

gistfile1.aw

<?php
function signin()
{
	if ($code = $_GET['code'])
	{
		$params = array(
			'client_id'	=> $this->client_id,
			'client_secret'	=> $this->client_secret,
			'redirect_uri'	=> $this->redirect_uri,
			'grant_type'	=> 'authorization_code',
			'code'		=> $code
		);
		
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, 'https://sso.lincoln.ac.uk/oauth/access_token');
		curl_setopt($ch, CURLOPT_POST, count($params));
		curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$result = curl_exec($ch);
		
		if ($result)
		{
			$json = json_decode($result);
			
			if ($json->error == 1)
			{
				echo 'SSO error - ' . $json->error_message;
			}
			
			else
			{
				$access_token = $json->access_token;
				
				//$user_details = file_get_contents('https://nucleus-proxy.online.lincoln.ac.uk/v1/people/user?access_token=' . $access_token);
				$user_details = file_get_contents('https://nucleus.lincoln.ac.uk/v1/people/user?access_token=' . $access_token);
				
				if ($user_details)
				{
					$user = json_decode($user_details);
					
					if ($user->error)
					{
						echo 'Nucleus error - ' . $user->message;
					}
					
					else
					{
						$this->session->set_userdata(array(
							'user_id'	=> $user->results[0]->id,
							'user_name'	=> $user->results[0]->name
						));
						
						// Do whatever now
					}
				}
				
				else
				{
					echo 'Failed to get user details';
				}
			}
		}
		
		else
		{
			echo 'Curl error - ' . curl_error($ch);
		}
		
		curl_close($ch);
	}
}