176 lines
4.8 KiB
PHP
176 lines
4.8 KiB
PHP
<?php
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/**
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* This module needs a lot of work.
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*
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* - setting/storing preferences
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* - documentation on how to obtain FB API keys for your site
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* - ensuring a valid FB login session
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* - requesting permissions within the FB login session to post on your behalf until permission revoked.
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*
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*/
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define('FACEBOOK_MAXPOSTLEN', 420);
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/* declare the facebook_module function so that /facebook url requests will land here */
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function facebook_module() {}
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/* If a->argv[1] is a nickname, this is a callback from Facebook oauth requests. */
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function facebook_init(&$a) {
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if($a->argc != 2)
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return;
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$nick = $a->argv[1];
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if(strlen($nick))
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$r = q("SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1",
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dbesc($nick)
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);
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if(! count($r))
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return;
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$uid = $r[0]['uid'];
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$auth_code = (($_GET['code']) ? $_GET['code'] : '');
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$error = (($_GET['error_description']) ? $_GET['error_description'] : '');
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if($error)
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logger('facebook_init: Error: ' . $error);
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if($auth_code && $uid) {
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$appid = get_config('facebook','appid');
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$appsecret = get_config('facebook', 'appsecret');
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$x = fetch_url('https://graph.facebook.com/oauth/access_token?client_id='
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. $appid . '&client_secret=' . $appsecret . '&redirect_uri='
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. urlencode($a->get_baseurl() . '/facebook/' . $nick)
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. '&code=' . $auth_code);
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logger('facebook_init: returned access token: ' . $x, LOGGER_DATA);
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if(strpos($x,'access_token=') !== false) {
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$token = str_replace('access_token=', '', $x);
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if(strpos($token,'&') !== false)
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$token = substr($token,0,strpos($token,'&'));
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set_pconfig($uid,'facebook','access_token',$token);
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set_pconfig($uid,'facebook','post','true');
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}
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// todo: is this a browser session or a server session? where do we go?
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}
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}
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function facebook_content(&$a) {
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if(! local_user()) {
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notice( t('Permission denied.') . EOL);
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return '';
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}
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if($a->argc > 1 && $a->argv[1] === 'remove') {
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del_pconfig(local_user(),'facebook','post');
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notice( t('Facebook disabled') . EOL);
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}
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$appid = get_config('facebook','appid');
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if(! $appid) {
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notify( t('Facebook API key is missing.') . EOL);
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return '';
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}
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$o .= '<h3>' . t('Facebook Connect') . '</h3>';
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$o .= '<br />';
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$o .= '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $appid . '&redirect_uri='
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. $a->get_baseurl() . '/facebook/' . $a->user['nickname'] . '&scope=publish_stream,read_stream,offline_access">' . t('Install Facebook posting') . '</a><br />';
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$o .= '<a href="' . $a->get_baseurl() . '/facebook/remove' . '">' . t('Remove Facebook posting') . '</a><br />';
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return $o;
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}
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function facebook_install() {
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register_hook('post_local_end', 'addon/facebook/facebook.php', 'facebook_post_hook');
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}
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function facebook_uninstall() {
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unregister_hook('post_local_end', 'addon/facebook/facebook.php', 'facebook_post_hook');
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}
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function facebook_post_hook(&$a,&$b) {
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/**
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* Post to Facebook stream
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*/
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logger('Facebook post');
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if((local_user()) && (local_user() == $b['uid']) && (! $b['private']) && (! $b['parent'])) {
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$appid = get_config('facebook', 'appid' );
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$secret = get_config('facebook', 'appsecret' );
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if($appid && $secret) {
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$fb_post = get_pconfig(local_user(),'facebook','post');
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$fb_token = get_pconfig(local_user(),'facebook','access_token');
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if($fb_post && $fb_token) {
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require_once('library/facebook.php');
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require_once('include/bbcode.php');
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$msg = $b['body'];
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logger('Facebook post2: msg=' . $msg, LOGGER_DATA);
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// make links readable before we strip the code
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$msg = preg_replace("/\[url=(.+?)\](.+?)\[\/url\]/is",'$2 ($1)',$msg);
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$msg = preg_replace("/\[img\](.+?)\[\/img\]/is", t('Image: ') . '$1',$msg);
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$msg = trim(strip_tags(bbcode($msg)));
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if (strlen($msg) > FACEBOOK_MAXPOSTLEN) {
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$shortlink = "";
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require_once('addon/twitter/slinky.php');
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$display_url = $a->get_baseurl() . '/display/' . $a->user['nickname'] . '/' . $b['id'];
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$slinky = new Slinky( $posturl );
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// setup a cascade of shortening services
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// try to get a short link from these services
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// in the order ur1.ca, trim, id.gd, tinyurl
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$slinky->set_cascade( array( new Slinky_UR1ca(), new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL() ) );
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$shortlink = $slinky->short();
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// the new message will be shortened such that "... $shortlink"
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// will fit into the character limit
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$msg = substr($msg, 0, FACEBOOK_MAXPOSTLEN - strlen($shortlink) - 4);
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$msg .= '... ' . $shortlink;
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}
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if(! strlen($msg))
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return;
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logger('Facebook post: msg=' . $msg, LOGGER_DATA);
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$postvars = array('access_token' => $fb_token, 'message' => $msg);
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$x = post_url('https://graph.facebook.com/me/feed', $postvars);
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logger('Facebook post returns: ' . $x, LOGGER_DEBUG);
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}
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}
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}
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}
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