<?php require_once('include/security.php'); require_once('include/bbcode.php'); require_once('include/items.php'); function like_content(&$a) { if(! local_user() && ! remote_user()) { return; } $verb = notags(trim($_GET['verb'])); if(! $verb) $verb = 'like'; switch($verb) { case 'like': case 'unlike': $activity = ACTIVITY_LIKE; break; case 'dislike': case 'undislike': $activity = ACTIVITY_DISLIKE; break; default: return; break; } $item_id = (($a->argc > 1) ? notags(trim($a->argv[1])) : 0); logger('like: verb ' . $verb . ' item ' . $item_id); $r = q("SELECT * FROM `item` WHERE `id` = '%s' OR `uri` = '%s' LIMIT 1", dbesc($item_id), dbesc($item_id) ); if(! $item_id || (! count($r))) { logger('like: no item ' . $item_id); return; } $item = $r[0]; $owner_uid = $item['uid']; if(! can_write_wall($a,$owner_uid)) { return; } $remote_owner = null; if(! $item['wall']) { // The top level post may have been written by somebody on another system $r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1", intval($item['contact-id']), intval($item['uid']) ); if(! count($r)) return; if(! $r[0]['self']) $remote_owner = $r[0]; } // this represents the post owner on this system. $r = q("SELECT `contact`.*, `user`.`nickname` FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` WHERE `contact`.`self` = 1 AND `contact`.`uid` = %d LIMIT 1", intval($owner_uid) ); if(count($r)) $owner = $r[0]; if(! $owner) { logger('like: no owner'); return; } if(! $remote_owner) $remote_owner = $owner; // This represents the person posting if((local_user()) && (local_user() == $owner_uid)) { $contact = $owner; } else { $r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1", intval($_SESSION['visitor_id']), intval($owner_uid) ); if(count($r)) $contact = $r[0]; } if(! $contact) { return; } // See if we've been passed a return path to redirect to $return_path = ((x($_REQUEST,'return')) ? $_REQUEST['return'] : ''); $r = q("SELECT `id`, `guid` FROM `item` WHERE `verb` = '%s' AND `deleted` = 0 AND `contact-id` = %d AND `uid` = %d AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s') LIMIT 1", dbesc($activity), intval($contact['id']), intval($owner_uid), dbesc($item_id), dbesc($item_id), dbesc($item['uri']) ); if(count($r)) { $like_item = $r[0]; // Already voted, undo it $r = q("UPDATE `item` SET `deleted` = 1, `unseen` = 1, `changed` = '%s' WHERE `id` = %d", dbesc(datetime_convert()), intval($like_item['id']) ); // Clean up the Diaspora signatures for this like // Go ahead and do it even if Diaspora support is disabled. We still want to clean up // if it had been enabled in the past $r = q("DELETE FROM `sign` WHERE `iid` = %d", intval($like_item['id']) ); // Save the author information for the unlike in case we need to relay to Diaspora store_diaspora_like_retract_sig($activity, $item, $like_item, $contact); // proc_run('php',"include/notifier.php","like","$post_id"); // $post_id isn't defined here! $like_item_id = $like_item['id']; proc_run('php',"include/notifier.php","like","$like_item_id"); like_content_return($a->get_baseurl(), $return_path); return; // NOTREACHED } $uri = item_new_uri($a->get_hostname(),$owner_uid); $post_type = (($item['resource-id']) ? t('photo') : t('status')); $objtype = (($item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE ); $link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id'] . '" />' . "\n") ; $body = $item['body']; $obj = <<< EOT <object> <type>$objtype</type> <local>1</local> <id>{$item['uri']}</id> <link>$link</link> <title></title> <content>$body</content> </object> EOT; if($verb === 'like') $bodyverb = t('%1$s likes %2$s\'s %3$s'); if($verb === 'dislike') $bodyverb = t('%1$s doesn\'t like %2$s\'s %3$s'); if(! isset($bodyverb)) return; $arr = array(); $arr['uri'] = $uri; $arr['uid'] = $owner_uid; $arr['contact-id'] = $contact['id']; $arr['type'] = 'activity'; $arr['wall'] = $item['wall']; $arr['origin'] = 1; $arr['gravity'] = GRAVITY_LIKE; $arr['parent'] = $item['id']; $arr['parent-uri'] = $item['uri']; $arr['thr-parent'] = $item['uri']; $arr['owner-name'] = $remote_owner['name']; $arr['owner-link'] = $remote_owner['url']; $arr['owner-avatar'] = $remote_owner['thumb']; $arr['author-name'] = $contact['name']; $arr['author-link'] = $contact['url']; $arr['author-avatar'] = $contact['thumb']; $ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]'; $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]'; $plink = '[url=' . $a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id'] . ']' . $post_type . '[/url]'; $arr['body'] = sprintf( $bodyverb, $ulink, $alink, $plink ); $arr['verb'] = $activity; $arr['object-type'] = $objtype; $arr['object'] = $obj; $arr['allow_cid'] = $item['allow_cid']; $arr['allow_gid'] = $item['allow_gid']; $arr['deny_cid'] = $item['deny_cid']; $arr['deny_gid'] = $item['deny_gid']; $arr['visible'] = 1; $arr['unseen'] = 1; $arr['last-child'] = 0; $post_id = item_store($arr); if(! $item['visible']) { $r = q("UPDATE `item` SET `visible` = 1 WHERE `id` = %d AND `uid` = %d", intval($item['id']), intval($owner_uid) ); } // Save the author information for the like in case we need to relay to Diaspora store_diaspora_like_sig($activity, $post_type, $contact, $post_id); $arr['id'] = $post_id; call_hooks('post_local_end', $arr); proc_run('php',"include/notifier.php","like","$post_id"); like_content_return($a->get_baseurl(), $return_path); killme(); // NOTREACHED // return; // NOTREACHED } // Decide how to return. If we were called with a 'return' argument, // then redirect back to the calling page. If not, just quietly end function like_content_return($baseurl, $return_path) { if($return_path) { $rand = '_=' . time(); if(strpos($return_path, '?')) $rand = "&$rand"; else $rand = "?$rand"; goaway($baseurl . "/" . $return_path . $rand); } killme(); } function store_diaspora_like_retract_sig($activity, $item, $like_item, $contact) { // Note that we can only create a signature for a user of the local server. We don't have // a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it // means we are the relay, and for relayable_retractions, Diaspora // only checks the parent_author_signature if it doesn't have to relay further // // If $item['resource-id'] exists, it means the item is a photo. Diaspora doesn't support // likes on photos, so don't bother. $enabled = intval(get_config('system','diaspora_enabled')); if(! $enabled) { logger('mod_like: diaspora support disabled, not storing like retraction signature', LOGGER_DEBUG); return; } logger('mod_like: storing diaspora like retraction signature'); if(($activity === ACTIVITY_LIKE) && (! $item['resource-id'])) { $signed_text = $like_item['guid'] . ';' . 'Like'; // Only works for NETWORK_DFRN $contact_baseurl_start = strpos($contact['url'],'://') + 3; $contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start; $contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length); $diaspora_handle = $contact['nick'] . '@' . $contact_baseurl; // Get contact's private key if he's a user of the local Friendica server $r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1", dbesc($contact['url']) ); if( $r) { $contact_uid = $r['uid']; $r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1", intval($contact_uid) ); if( $r) $authorsig = base64_encode(rsa_sign($signed_text,$r['prvkey'],'sha256')); } if(! isset($authorsig)) $authorsig = ''; q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ", intval($like_item['id']), dbesc($signed_text), dbesc($authorsig), dbesc($diaspora_handle) ); } return; } function store_diaspora_like_sig($activity, $post_type, $contact, $post_id) { // Note that we can only create a signature for a user of the local server. We don't have // a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it // means we are the relay, and for relayable_retractions, Diaspora // only checks the parent_author_signature if it doesn't have to relay further $enabled = intval(get_config('system','diaspora_enabled')); if(! $enabled) { logger('mod_like: diaspora support disabled, not storing like signature', LOGGER_DEBUG); return; } logger('mod_like: storing diaspora like signature'); if(($activity === ACTIVITY_LIKE) && ($post_type === t('status'))) { // Only works for NETWORK_DFRN $contact_baseurl_start = strpos($contact['url'],'://') + 3; $contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start; $contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length); $diaspora_handle = $contact['nick'] . '@' . $contact_baseurl; // Get contact's private key if he's a user of the local Friendica server $r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1", dbesc($contact['url']) ); if( $r) { $contact_uid = $r['uid']; $r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1", intval($contact_uid) ); if( $r) $contact_uprvkey = $r['prvkey']; } $r = q("SELECT guid, parent FROM `item` WHERE id = %d LIMIT 1", intval($post_id) ); if( $r) { $p = q("SELECT guid FROM `item` WHERE id = %d AND parent = %d LIMIT 1", intval($r[0]['parent']), intval($r[0]['parent']) ); if( $p) { $signed_text = $r[0]['guid'] . ';Post;' . $p[0]['guid'] . ';true;' . $diaspora_handle; if(isset($contact_uprvkey)) $authorsig = base64_encode(rsa_sign($signed_text,$contact_uprvkey,'sha256')); else $authorsig = ''; q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ", intval($post_id), dbesc($signed_text), dbesc($authorsig), dbesc($diaspora_handle) ); } } } return; }