#!/usr/bin/env php
<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.     If not, see <http://www.gnu.org/licenses/>.
 */

# Abort if called from a web server
if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
    print "This script must be run from the command line\n";
    exit();
}

define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
define('LACONICA', true);

require_once INSTALLDIR . '/lib/common.php';
require_once INSTALLDIR . '/lib/facebookutil.php';

// For storing the last run date-time
$last_updated_file = INSTALLDIR . '/scripts/facebook_last_updated';

// Lock file name
$tmp_file = INSTALLDIR . '/scripts/update_facebook.lock';

// Make sure only one copy of the script is running at a time
if (!($tmp_file = @fopen($tmp_file, "w")))
{
	die("Can't open lock file. Script already running?");
}

$facebook = getFacebook();

$current_time = time();

$since = getLastUpdated();

$notice = getFacebookNotices($since);

$cnt = 0;

while($notice->fetch()) {

    $flink = Foreign_link::getByUserID($notice->profile_id, FACEBOOK_SERVICE);
    $user = $flink->getUser();
    $fbuid = $flink->foreign_id;
    
    if (!userCanUpdate($fbuid)) {
        continue;
    }

    $prefix = $facebook->api_client->data_getUserPreference(FACEBOOK_NOTICE_PREFIX, $fbuid);
    $content = "$prefix $notice->content";
    
    if (($flink->noticesync & FOREIGN_NOTICE_SEND) == FOREIGN_NOTICE_SEND) {

        // If it's not a reply, or if the user WANTS to send replies...
        if (!preg_match('/@[a-zA-Z0-9_]{1,15}\b/u', $content) ||
            (($flink->noticesync & FOREIGN_NOTICE_SEND_REPLY) == FOREIGN_NOTICE_SEND_REPLY)) {
             
                // Avoid a Loop
                if ($notice->source != 'Facebook') {
                    updateStatus($fbuid, $content);
                    updateProfileBox($facebook, $flink, $notice);
                    $cnt++;
                }
            }
    }
}

if ($cnt > 0) {
    print date('r', $current_time) . 
	": Found $cnt new notices to send to Facebook since last run at " . 
	 date('Y-m-d H:i:s', $since) . "\n";

    updateLastUpdated($current_time);
}

exit(0);


function userCanUpdate($fbuid) {
    
    global $facebook;

    $result = false;
    
    try {
        $result = $facebook->api_client->users_hasAppPermission('status_update', $fbuid);
    } catch(FacebookRestClientException $e){
        print_r($e);
    }

    return $result;
}


function updateStatus($fbuid, $content) {
    global $facebook;

    try {
        $result = $facebook->api_client->users_setStatus($content, $fbuid, false, true);
    } catch(FacebookRestClientException $e){
    	print_r($e);
    }
}

function getLastUpdated(){
	global $last_updated_file, $current_time;

	$file = fopen($last_updated_file, 'r');

	if ($file) {
	    $last = fgets($file);
	} else {
	    print "Unable to read $last_updated_file. Using current time.\n";
	    return $current_time;
	}

	fclose($file);

	return $last;
}

function updateLastUpdated($time){
	global $last_updated_file;
	$file = fopen($last_updated_file, 'w') or die("Can't open $last_updated_file for writing!");
	fwrite($file, $time);
	fclose($file);
}