<?php /** @file */

/** 
 * OAuth-1 server
 * 
 */

define('REQUEST_TOKEN_DURATION', 300);
define('ACCESS_TOKEN_DURATION', 31536000);

require_once('library/OAuth1.php');


class ZotOAuth1DataStore extends OAuth1DataStore {

	function gen_token(){
		return md5(base64_encode(pack('N6', mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand(), uniqid())));
	}
	
	function lookup_consumer($consumer_key) {
		logger('consumer_key: ' . $consumer_key, LOGGER_DEBUG);

		$r = q("SELECT client_id, pw, redirect_uri FROM clients WHERE client_id = '%s'",
			dbesc($consumer_key)
		);

		if($r) {
			App::set_oauth_key($consumer_key);
			return new OAuth1Consumer($r[0]['client_id'],$r[0]['pw'],$r[0]['redirect_uri']);
		}
		return null;
	}

	function lookup_token($consumer, $token_type, $token) {

		logger(__function__ . ':' . $consumer . ', ' . $token_type . ', ' . $token, LOGGER_DEBUG);

		$r = q("SELECT id, secret, auth_scope, expires, uid  FROM tokens WHERE client_id = '%s' AND auth_scope = '%s' AND id = '%s'",
			dbesc($consumer->key),
			dbesc($token_type),
			dbesc($token)
		);

		if ($r) {
			$ot = new OAuth1Token($r[0]['id'],$r[0]['secret']);
			$ot->scope = $r[0]['auth_scope'];
			$ot->expires = $r[0]['expires'];
			$ot->uid = $r[0]['uid'];
			return $ot;
		}
		return null;
	}

	function lookup_nonce($consumer, $token, $nonce, $timestamp) {

		$r = q("SELECT id, secret FROM tokens WHERE client_id = '%s' AND id = '%s' AND expires = %d",
			dbesc($consumer->key),
			dbesc($nonce),
			intval($timestamp)
		);

		if ($r) {
			return new OAuth1Token($r[0]['id'],$r[0]['secret']);
		}
		return null;
	}

	function new_request_token($consumer, $callback = null) {

		logger(__function__ . ':' . $consumer . ', ' . $callback, LOGGER_DEBUG);

		$key = $this->gen_token();
		$sec = $this->gen_token();
		
		if ($consumer->key){
			$k = $consumer->key;
		}
		else {
			$k = $consumer;
		}

		$r = q("INSERT INTO tokens (id, secret, client_id, auth_scope, expires, uid) VALUES ('%s','%s','%s','%s', %d, 0)",
				dbesc($key),
				dbesc($sec),
				dbesc($k),
				'request',
				time()+intval(REQUEST_TOKEN_DURATION));

		if (! $r) {
			return null;
		}
		return new OAuth1Token($key,$sec);
	}

	function new_access_token($token, $consumer, $verifier = null) {

		logger(__function__ . ':' . $token . ', ' . $consumer .', ' . $verifier, LOGGER_DEBUG);
    
		// return a new access token attached to this consumer
		// for the user associated with this token if the request token
		// is authorized
		// should also invalidate the request token
	
		$ret = null;
	
		// get user for this verifier
		$uverifier = get_config("oauth", $verifier);
		logger(__function__ . ':' . $verifier . ', ' . $uverifier, LOGGER_DEBUG);
		if (is_null($verifier) || ($uverifier !== false)) {
		
			$key = $this->gen_token();
			$sec = $this->gen_token();

			$r = q("INSERT INTO tokens (id, secret, client_id, auth_scope, expires, uid) VALUES ('%s','%s','%s','%s', %d, %d)",
				dbesc($key),
				dbesc($sec),
				dbesc($consumer->key),
				'access',
				time()+intval(ACCESS_TOKEN_DURATION),
				intval($uverifier));

			if ($r) {
				$ret = new OAuth1Token($key,$sec);
			}
		}
		
		
		q("DELETE FROM tokens WHERE id='%s'", $token->key);
	
	
		if (! is_null($ret) && $uverifier !== false) {
			del_config('oauth', $verifier);
		}
		return $ret;
	}
}

class ZotOAuth1 extends OAuth1Server {

	function __construct() {
		parent::__construct(new ZotOAuth1DataStore());
		$this->add_signature_method(new OAuth1SignatureMethod_PLAINTEXT());
		$this->add_signature_method(new OAuth1SignatureMethod_HMAC_SHA1());
	}
	
	function loginUser($uid) {

		logger("ZotOAuth1::loginUser $uid");

		$r = q("SELECT * FROM channel WHERE channel_id = %d LIMIT 1",
			intval($uid)
		);
		if ($r) {
			$record = $r[0];
		}
		else {
			logger('ZotOAuth1::loginUser failure: ' . print_r($_SERVER,true), LOGGER_DEBUG);
			header('HTTP/1.0 401 Unauthorized');
			echo('This api requires login');
			killme();
		}

		$_SESSION['uid'] = $record['channel_id'];
		$_SESSION['addr'] = $_SERVER['REMOTE_ADDR'];

		$x = q("select * from account where account_id = %d limit 1",
			intval($record['channel_account_id'])
		);
		if ($x) {
			require_once('include/security.php');
			authenticate_success($x[0],null,true,false,true,true);
			$_SESSION['allow_api'] = true;
		}
	}
	
}