/**
 * THE BELOW CODE IS BASED ON THE Reddit API BY HENRY SMITH (details below)
 *
 * The main class of the API client, handling its state and the sending of
 * queries to the API 
 * 
 * @author    Henry Smith <henry@henrysmith.org> 
 * @copyright 2011 Henry Smith
 * @license   GPLv2.0
 * @package   Reddit API Client
 * @version   0.5.2
 */

	/**
	* Tries to login to Reddit
	* 
	* @access public
	* @return boolean
	*/
	public function login($username, $password) {
        $request = new HttpRequest;
        $request->setUrl('http://www.reddit.com/api/login');
        $request->setHttpMethod('POST');
        $request->setPostVariable('user', $username);
        $request->setPostVariable('passwd', $password);
		$request->setHeader('user-agent',$username);
		
		echo "<pre>";
		print_r($request);
		echo "</pre>";

        $response = $request->getResponse();
        $headers = $response->getHeaders();


        foreach ($headers as $header) {
            if (preg_match('/reddit_session=([^;]+);/', $header, $matches)) {
                $this->sessionCookie = $matches[1];
                return true;
            }
        }

        return false;
    }
	

    /**
     * Sends a request to Reddit and returns the response received
     * 
     * @access public
     * @param  string $verb  'GET', 'POST', ...
     * @param  string $url   'http://www.reddit.com/comments/6nw57.json'
     * @param  string $body 
     * @return array
     */
	public function sendRequest($verb, $url, $body = '') {
        $request = new HttpRequest;
        $request->setUrl($url);
        $request->setHttpMethod($verb);
		$request->setHeader('user-agent',$this->username);

        if ($verb === 'POST' && is_array($body)) {
            foreach ($body as $name => $value) {
                $request->setPostVariable($name, $value);
            }
        }

        if ($this->sessionCookie !== null) {
            $request->setCookie('reddit_session', $this->sessionCookie);
        }

        $response = $request->getResponse();

        if (!($response instanceof HttpResponse)) {
            return null;
        }

        $responseBody = $response->getBody();
        $response = json_decode($responseBody, true);

        if (isset($response['data']['modhash'])) {
            $this->modHash = $response['data']['modhash'];
        } elseif (isset($response[0]['data']['modhash'])) {
            $this->modHash = $response[0]['data']['modhash'];
        }

        return $response;
    }

    /**
     * Posts a comment in reply to a link or comment
     * 
     * @access public
     * @param  string $parentId 
     * @param  string $text 
     * @return boolean
     */
    public function comment($parentId, $text) {
        if (!$this->isLoggedIn()) {
            $message = 'Cannot post a comment without a valid login';
            $code = RedditException::LOGIN_REQUIRED;
            throw new RedditException($message, $code);
        }
		echo $this->modHash;

        $verb = 'POST';
        $url = 'http://www.reddit.com/api/comment';
        $data = array(
            'thing_id' => $parentId,
            'text' => $text,
            'uh' => $this->modHash,
        );

        $response = $this->sendRequest($verb, $url, $data);

        if (!is_array($response) || !isset($response['jquery'])) {
            return false;
        }

        foreach ($response['jquery'] as $element) {

            if (isset($element[3][0][0])) {
                continue;
            }

            if (strpos($element[3][0], '.error') === true) {
                return false;
            }
        }


        return true;
    }

    /**
     * Casts a vote for a comment or link
     *
     * @access public
     * @param  string  $thingId 
     * @param  integer $direction  1 for upvote, -1 for down, 0 to remove vote
     * @return boolean
     */
    public function vote($thingId, $direction) {
        if (!$this->isLoggedIn()) {
            $message = 'Cannot vote without a valid login';
            $code = RedditException::LOGIN_REQUIRED;
            throw new RedditException($message, $code);
        }

        $verb = 'POST';
        $url = 'http://www.reddit.com/api/vote';
        $data = array(
            'thing_id' => $thingId,
            'dir' => $direction,
            'uh' => $this->modHash,
        );

        $response = $this->sendRequest($verb, $url, $data);

        if (empty($response)) {
            return true;
        } else {
            return false;
        }
    }	

	$rlink = "12f98r";					// The link to the article in question

	print_r($bot0 = new Reddit("botkin0","Redd!@#4"));
	$itsa_link = $bots0->getLink($rlink);
	
	print_r($itsa_link);		// Diagnostic
	
	echo "<br/><br/>Targeting link $rlink: ".'"<b>'.$itsa_link[title].'"</b>'."<br/>";
	
	if ($bots0->comment("t3_".$rlink,"Adding third comment"))
	echo "success";
	else 
	echo "fail";
	if ($bots0->vote("t3_".$rlink,1))
	echo "success";
	else 
	echo "fail";