+function diaspora_like($importer,$xml,$msg) {
+
+ $a = get_app();
+ $guid = notags(unxmlify($xml->guid));
+ $parent_guid = notags(unxmlify($xml->parent_guid));
+ $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+ $target_type = notags(unxmlify($xml->target_type));
+ $positive = notags(unxmlify($xml->positive));
+ $author_signature = notags(unxmlify($xml->author_signature));
+
+ $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
+
+ // likes on comments not supported here and likes on photos not supported by Diaspora
+
+ if($target_type !== 'Post')
+ return;
+
+ $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
+ if(! $contact) {
+ logger('diaspora_like: cannot find contact: ' . $msg['author']);
+ return;
+ }
+
+ if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
+ logger('diaspora_like: Ignoring this author.');
+ return 202;
+ }
+
+ $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+ intval($importer['uid']),
+ dbesc($parent_guid)
+ );
+ if(! count($r)) {
+ logger('diaspora_like: parent item not found: ' . $guid);
+ return;
+ }
+
+ $parent_item = $r[0];
+
+ $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+ intval($importer['uid']),
+ dbesc($guid)
+ );
+ if(count($r)) {
+ if($positive === 'true') {
+ logger('diaspora_like: duplicate like: ' . $guid);
+ return;
+ }
+ if($positive === 'false') {
+ q("UPDATE `item` SET `deleted` = 1 WHERE `id` = %d AND `uid` = %d LIMIT 1",
+ intval($r[0]['id']),
+ intval($importer['uid'])
+ );
+ // FIXME
+ // send notification via proc_run()
+ return;
+ }
+ }
+ if($positive === 'false') {
+ logger('diaspora_like: unlike received with no corresponding like');
+ return;
+ }
+
+ $author_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
+
+ $author_signature = base64_decode($author_signature);
+
+ if(strcasecmp($diaspora_handle,$msg['author']) == 0) {
+ $person = $contact;
+ $key = $msg['key'];
+ }
+ else {
+ $person = find_diaspora_person_by_handle($diaspora_handle);
+ if(is_array($person) && x($person,'pubkey'))
+ $key = $person['pubkey'];
+ else {
+ logger('diaspora_like: unable to find author details');
+ return;
+ }
+ }
+
+ if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
+ logger('diaspora_like: verification failed.');
+ return;
+ }
+
+ if($parent_author_signature) {
+
+ $owner_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
+
+ $parent_author_signature = base64_decode($parent_author_signature);
+
+ $key = $msg['key'];
+
+ if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
+ logger('diaspora_like: owner verification failed.');
+ return;
+ }
+ }
+
+ // Phew! Everything checks out. Now create an item.
+
+ $uri = $diaspora_handle . ':' . $guid;
+
+ $activity = ACTIVITY_LIKE;
+ $post_type = (($parent_item['resource-id']) ? t('photo') : t('status'));
+ $objtype = (($parent_item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
+ $link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . '" />' . "\n") ;
+ $body = $parent_item['body'];
+
+ $obj = <<< EOT
+
+ <object>
+ <type>$objtype</type>
+ <local>1</local>
+ <id>{$parent_item['uri']}</id>
+ <link>$link</link>
+ <title></title>
+ <content>$body</content>
+ </object>
+EOT;
+ $bodyverb = t('%1$s likes %2$s\'s %3$s');
+
+ $arr = array();
+
+ $arr['uri'] = $uri;
+ $arr['uid'] = $importer['uid'];
+ $arr['guid'] = $guid;
+ $arr['contact-id'] = $contact['id'];
+ $arr['type'] = 'activity';
+ $arr['wall'] = $parent_item['wall'];
+ $arr['gravity'] = GRAVITY_LIKE;
+ $arr['parent'] = $parent_item['id'];
+ $arr['parent-uri'] = $parent_item['uri'];
+
+ $arr['owner-name'] = $contact['name'];
+ $arr['owner-link'] = $contact['url'];
+ $arr['owner-avatar'] = $contact['thumb'];
+
+ $arr['author-name'] = $person['name'];
+ $arr['author-link'] = $person['url'];
+ $arr['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
+
+ $ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
+ $alink = '[url=' . $parent_item['author-link'] . ']' . $parent_item['author-name'] . '[/url]';
+ $plink = '[url=' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . ']' . $post_type . '[/url]';
+ $arr['body'] = sprintf( $bodyverb, $ulink, $alink, $plink );
+
+ $arr['app'] = 'Diaspora';
+
+ $arr['private'] = $parent_item['private'];
+ $arr['verb'] = $activity;
+ $arr['object-type'] = $objtype;
+ $arr['object'] = $obj;
+ $arr['visible'] = 1;
+ $arr['unseen'] = 1;
+ $arr['last-child'] = 0;
+
+ $message_id = item_store($arr);
+
+
+ if($message_id) {
+ q("update item set plink = '%s' where id = %d limit 1",
+ dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
+ intval($message_id)
+ );
+ }
+
+ if(! $parent_author_signature) {
+ q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+ intval($message_id),
+ dbesc($author_signed_data),
+ dbesc(base64_encode($author_signature)),
+ dbesc($diaspora_handle)
+ );
+ }
+
+ // if the message isn't already being relayed, notify others
+ // the existence of parent_author_signature means the parent_author or owner
+ // is already relaying.
+
+ if(! $parent_author_signature)
+ proc_run('php','include/notifier.php','comment',$message_id);
+
+ return;
+}
+
+function diaspora_retraction($importer,$xml) {
+
+ $guid = notags(unxmlify($xml->guid));
+ $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+ $type = notags(unxmlify($xml->type));
+
+ $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
+ if(! $contact)
+ return;
+
+ if($type === 'Person') {
+ contact_remove($contact['id']);
+ }
+ elseif($type === 'Post') {
+ $r = q("select * from item where guid = '%s' and uid = %d limit 1",
+ dbesc('guid'),
+ intval($importer['uid'])
+ );
+ if(count($r)) {
+ if(link_compare($r[0]['author-link'],$contact['url'])) {
+ q("update item set `deleted` = 1, `changed` = '%s' where `id` = %d limit 1",
+ dbesc(datetime_convert()),
+ intval($r[0]['id'])
+ );
+ }
+ }
+ }
+
+ return 202;
+ // NOTREACHED
+}
+
+function diaspora_share($me,$contact) {
+ $a = get_app();
+ $myaddr = $me['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+ $theiraddr = $contact['addr'];
+
+ $tpl = get_markup_template('diaspora_share.tpl');
+ $msg = replace_macros($tpl, array(
+ '$sender' => $myaddr,
+ '$recipient' => $theiraddr
+ ));
+
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
+
+ return(diaspora_transmit($owner,$contact,$slap));
+}
+
+function diaspora_unshare($me,$contact) {
+
+ $a = get_app();
+ $myaddr = $me['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+
+ $tpl = get_markup_template('diaspora_retract.tpl');
+ $msg = replace_macros($tpl, array(
+ '$guid' => $me['guid'],
+ '$type' => 'Person',
+ '$handle' => $myaddr
+ ));
+
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
+
+ return(diaspora_transmit($owner,$contact,$slap));
+
+}
+
+
+
+function diaspora_send_status($item,$owner,$contact) {
+
+ $a = get_app();
+ $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+ $theiraddr = $contact['addr'];
+
+ $images = array();
+
+ $body = $item['body'];
+
+ $cnt = preg_match_all('|\[img\](.*?)\[\/img\]|',$body,$matches,PREG_SET_ORDER);
+ if($cnt) {
+ foreach($matches as $mtch) {
+ $detail = array();
+ $detail['str'] = $mtch[0];
+ $detail['path'] = dirname($mtch[1]) . '/';
+ $detail['file'] = basename($mtch[1]);
+ $detail['guid'] = $item['guid'];
+ $detail['handle'] = $myaddr;
+ $images[] = $detail;
+ $body = str_replace($detail['str'],t('link'),$body);
+ }
+ }
+
+ $body = xmlify(html_entity_decode(bb2diaspora($body)));
+
+ $public = (($item['private']) ? 'false' : 'true');
+
+ require_once('include/datetime.php');
+ $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
+
+ $tpl = get_markup_template('diaspora_post.tpl');
+ $msg = replace_macros($tpl, array(
+ '$body' => $body,
+ '$guid' => $item['guid'],
+ '$handle' => xmlify($myaddr),
+ '$public' => $public,
+ '$created' => $created
+ ));
+
+ logger('diaspora_send_status: ' . $owner['username'] . ' -> ' . $contact['name'] . ' base message: ' . $msg, LOGGER_DATA);
+
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'])));
+
+ $return_code = diaspora_transmit($owner,$contact,$slap);
+
+ if(count($images)) {
+ diaspora_send_images($item,$owner,$contact,$images);
+ }
+
+ return $return_code;
+}
+
+
+function diaspora_send_images($item,$owner,$contact,$images) {
+ $a = get_app();
+ if(! count($images))
+ return;
+ $mysite = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://') + 3) . '/photo';
+
+ $tpl = get_markup_template('diaspora_photo.tpl');
+ foreach($images as $image) {
+ if(! stristr($image['path'],$mysite))
+ continue;
+ $resource = str_replace('.jpg','',$image['file']);
+ $resource = substr($resource,0,strpos($resource,'-'));
+
+ $r = q("select * from photo where `resource-id` = '%s' and `uid` = %d limit 1",
+ dbesc($resource),
+ intval($owner['uid'])
+ );
+ if(! count($r))
+ continue;
+ $public = (($r[0]['allow_cid'] || $r[0]['allow_gid'] || $r[0]['deny_cid'] || $r[0]['deny_gid']) ? 'false' : 'true' );
+ $msg = replace_macros($tpl,array(
+ '$path' => xmlify($image['path']),
+ '$filename' => xmlify($image['file']),
+ '$msg_guid' => xmlify($image['guid']),
+ '$guid' => xmlify($r[0]['guid']),
+ '$handle' => xmlify($image['handle']),
+ '$public' => xmlify($public),
+ '$created_at' => xmlify(datetime_convert('UTC','UTC',$r[0]['created'],'Y-m-d H:i:s \U\T\C'))
+ ));
+
+
+ logger('diaspora_send_photo: base message: ' . $msg, LOGGER_DATA);
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'])));
+
+ diaspora_transmit($owner,$contact,$slap);
+ }
+
+}
+
+function diaspora_send_followup($item,$owner,$contact) {
+
+ $a = get_app();
+ $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+ $theiraddr = $contact['addr'];
+
+ $p = q("select guid from item where parent = %d limit 1",
+ $item['parent']
+ );
+ if(count($p))
+ $parent_guid = $p[0]['guid'];
+ else
+ return;
+
+ if($item['verb'] === ACTIVITY_LIKE) {
+ $tpl = get_markup_template('diaspora_like.tpl');
+ $like = true;
+ $target_type = 'Post';
+ $positive = (($item['deleted']) ? 'false' : 'true');
+ }
+ else {
+ $tpl = get_markup_template('diaspora_comment.tpl');
+ $like = false;
+ }
+
+ $text = html_entity_decode(bb2diaspora($item['body']));
+
+ // sign it
+
+ if($like)
+ $signed_text = $item['guid'] . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $myaddr;
+ else
+ $signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $myaddr;
+
+ $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
+
+ $msg = replace_macros($tpl,array(
+ '$guid' => xmlify($item['guid']),
+ '$parent_guid' => xmlify($parent_guid),
+ '$target_type' =>xmlify($target_type),
+ '$authorsig' => xmlify($authorsig),
+ '$body' => xmlify($text),
+ '$positive' => xmlify($positive),
+ '$handle' => xmlify($myaddr)
+ ));
+
+ logger('diaspora_followup: base message: ' . $msg, LOGGER_DATA);
+
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'])));
+
+ return(diaspora_transmit($owner,$contact,$slap));
+}
+
+
+function diaspora_send_relay($item,$owner,$contact) {
+
+
+ $a = get_app();
+ $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+ $theiraddr = $contact['addr'];
+
+
+ $p = q("select guid from item where parent = %d limit 1",
+ $item['parent']
+ );
+ if(count($p))
+ $parent_guid = $p[0]['guid'];
+ else
+ return;
+
+ if($item['verb'] === ACTIVITY_LIKE) {
+ $tpl = get_markup_template('diaspora_like_relay.tpl');
+ $like = true;
+ $target_type = 'Post';
+ $positive = (($item['deleted']) ? 'false' : 'true');
+ }
+ else {
+ $tpl = get_markup_template('diaspora_comment_relay.tpl');
+ $like = false;
+ }
+
+ $body = $item['body'];
+
+ $text = html_entity_decode(bb2diaspora($body));
+
+ // fetch the original signature if somebody sent the post to us to relay
+ // If we are relaying for a reply originating on our own account, there wasn't a 'send to relay'
+ // action. It wasn't needed. In that case create the original signature and the
+ // owner (parent author) signature
+ // comments from other networks will be relayed under our name, with a brief
+ // preamble to describe what's happening and noting the real author
+
+ $r = q("select * from sign where iid = %d limit 1",
+ intval($item['id'])
+ );
+ if(count($r)) {
+ $orig_sign = $r[0];
+ $signed_text = $orig_sign['signed_text'];
+ $authorsig = $orig_sign['signature'];
+ $handle = $orig_sign['signer'];
+ }
+ else {
+
+ $itemcontact = q("select * from contact where `id` = %d limit 1",
+ intval($item['contact-id'])
+ );
+ if(count($itemcontact)) {
+ if(! $itemcontact[0]['self']) {
+ $prefix = sprintf( t('[Relayed] Comment authored by %s from network %s'),
+ '['. $item['author-name'] . ']' . '(' . $item['author-link'] . ')',
+ network_to_name($itemcontact['network'])) . "\n";
+ $body = $prefix . $body;
+ }
+ }
+ else {
+
+ if($like)
+ $signed_text = $item['guid'] . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $myaddr;
+ else
+ $signed_text = $item['guid'] . ';' . $parent_guid . ';' . $text . ';' . $myaddr;
+
+ $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
+
+ q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+ intval($item['id']),
+ dbesc($signed_text),
+ dbesc(base64_encode($authorsig)),
+ dbesc($myaddr)
+ );
+ $handle = $myaddr;
+ }
+ }
+
+ // sign it
+
+ $parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
+
+ $msg = replace_macros($tpl,array(
+ '$guid' => xmlify($item['guid']),
+ '$parent_guid' => xmlify($parent_guid),
+ '$target_type' =>xmlify($target_type),
+ '$authorsig' => xmlify($orig_sign['signature']),
+ '$parentsig' => xmlify($parentauthorsig),
+ '$body' => xmlify($text),
+ '$positive' => xmlify($positive),
+ '$handle' => xmlify($handle)
+ ));
+
+ logger('diaspora_relay_comment: base message: ' . $msg, LOGGER_DATA);
+
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'])));
+
+ return(diaspora_transmit($owner,$contact,$slap));
+
+}
+
+
+
+function diaspora_send_retraction($item,$owner,$contact) {
+
+ $a = get_app();
+ $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+
+ $tpl = get_markup_template('diaspora_retract.tpl');
+ $msg = replace_macros($tpl, array(
+ '$guid' => $item['guid'],
+ '$type' => 'Post',
+ '$handle' => $myaddr
+ ));
+
+ $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'])));
+
+ return(diaspora_transmit($owner,$contact,$slap));
+}
+
+
+
+function diaspora_transmit($owner,$contact,$slap) {
+
+ $a = get_app();
+
+ post_url($contact['notify'] . '/',$slap);
+ $return_code = $a->get_curl_code();
+ logger('diaspora_transmit: returns: ' . $return_code);
+
+ if(! $return_code) {
+ logger('diaspora_transmit: queue message');
+ // queue message for redelivery
+ q("INSERT INTO `queue` ( `cid`, `created`, `last`, `content`)
+ VALUES ( %d, '%s', '%s', '%s') ",
+ intval($contact['id']),
+ dbesc(datetime_convert()),
+ dbesc(datetime_convert()),
+ dbesc($slap)
+ );
+ }
+
+ return(($return_code) ? $return_code : (-1));
+}