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diaspora.php
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diaspora.php
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<?php
require_once('include/crypto.php');
require_once('include/items.php');
require_once('include/bb2diaspora.php');
require_once('include/contact_selectors.php');
require_once('include/queue_fn.php');
require_once('include/lock.php');
function diaspora_dispatch_public($msg) {
$enabled = intval(get_config('system','diaspora_enabled'));
if(! $enabled) {
logger('mod-diaspora: disabled');
return;
}
$r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN ( SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s' ) AND `account_expired` = 0 ",
dbesc(NETWORK_DIASPORA),
dbesc($msg['author'])
);
if(count($r)) {
foreach($r as $rr) {
logger('diaspora_public: delivering to: ' . $rr['username']);
diaspora_dispatch($rr,$msg);
}
}
else
logger('diaspora_public: no subscribers');
}
function diaspora_dispatch($importer,$msg) {
$ret = 0;
$enabled = intval(get_config('system','diaspora_enabled'));
if(! $enabled) {
logger('mod-diaspora: disabled');
return;
}
// php doesn't like dashes in variable names
$msg['message'] = str_replace(
array('<activity_streams-photo>','</activity_streams-photo>'),
array('<asphoto>','</asphoto>'),
$msg['message']);
$parsed_xml = parse_xml_string($msg['message'],false);
$xmlbase = $parsed_xml->post;
logger('diaspora_dispatch: ' . print_r($xmlbase,true), LOGGER_DEBUG);
if($xmlbase->request) {
$ret = diaspora_request($importer,$xmlbase->request);
}
elseif($xmlbase->status_message) {
$ret = diaspora_post($importer,$xmlbase->status_message,$msg);
}
elseif($xmlbase->profile) {
$ret = diaspora_profile($importer,$xmlbase->profile,$msg);
}
elseif($xmlbase->comment) {
$ret = diaspora_comment($importer,$xmlbase->comment,$msg);
}
elseif($xmlbase->like) {
$ret = diaspora_like($importer,$xmlbase->like,$msg);
}
elseif($xmlbase->asphoto) {
$ret = diaspora_asphoto($importer,$xmlbase->asphoto,$msg);
}
elseif($xmlbase->reshare) {
$ret = diaspora_reshare($importer,$xmlbase->reshare,$msg);
}
elseif($xmlbase->retraction) {
$ret = diaspora_retraction($importer,$xmlbase->retraction,$msg);
}
elseif($xmlbase->signed_retraction) {
$ret = diaspora_signed_retraction($importer,$xmlbase->signed_retraction,$msg);
}
elseif($xmlbase->relayable_retraction) {
$ret = diaspora_signed_retraction($importer,$xmlbase->relayable_retraction,$msg);
}
elseif($xmlbase->photo) {
$ret = diaspora_photo($importer,$xmlbase->photo,$msg);
}
elseif($xmlbase->conversation) {
$ret = diaspora_conversation($importer,$xmlbase->conversation,$msg);
}
elseif($xmlbase->message) {
$ret = diaspora_message($importer,$xmlbase->message,$msg);
}
else {
logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true));
}
return $ret;
}
function diaspora_handle_from_contact($contact_id) {
$handle = False;
logger("diaspora_handle_from_contact: contact id is " . $contact_id, LOGGER_DEBUG);
$r = q("SELECT network, addr, self, url, nick FROM contact WHERE id = %d",
intval($contact_id)
);
if($r) {
$contact = $r[0];
logger("diaspora_handle_from_contact: contact 'self' = " . $contact['self'] . " 'url' = " . $contact['url'], LOGGER_DEBUG);
if($contact['network'] === NETWORK_DIASPORA) {
$handle = $contact['addr'];
// logger("diaspora_handle_from_contact: contact id is a Diaspora person, handle = " . $handle, LOGGER_DEBUG);
}
elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
$baseurl_start = strpos($contact['url'],'://') + 3;
$baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
$baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
$handle = $contact['nick'] . '@' . $baseurl;
// logger("diaspora_handle_from_contact: contact id is a DFRN person, handle = " . $handle, LOGGER_DEBUG);
}
}
return $handle;
}
function diaspora_get_contact_by_handle($uid,$handle) {
$r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `addr` = '%s' LIMIT 1",
dbesc(NETWORK_DIASPORA),
intval($uid),
dbesc($handle)
);
if($r && count($r))
return $r[0];
return false;
}
function find_diaspora_person_by_handle($handle) {
$person = false;
$update = false;
$got_lock = false;
$endlessloop = 0;
$maxloops = 10;
do {
$r = q("select * from fcontact where network = '%s' and addr = '%s' limit 1",
dbesc(NETWORK_DIASPORA),
dbesc($handle)
);
if(count($r)) {
$person = $r[0];
logger('find_diaspora_person_by handle: in cache ' . print_r($r,true), LOGGER_DEBUG);
// update record occasionally so it doesn't get stale
$d = strtotime($person['updated'] . ' +00:00');
if($d < strtotime('now - 14 days'))
$update = true;
}
// FETCHING PERSON INFORMATION FROM REMOTE SERVER
//
// If the person isn't in our 'fcontact' table, or if he/she is but
// his/her information hasn't been updated for more than 14 days, then
// we want to fetch the person's information from the remote server.
//
// Note that $person isn't changed by this block of code unless the
// person's information has been successfully fetched from the remote
// server. So if $person was 'false' to begin with (because he/she wasn't
// in the local cache), it'll stay false, and if $person held the local
// cache information to begin with, it'll keep that information. That way
// if there's a problem with the remote fetch, we can at least use our
// cached information--it's better than nothing.
if((! $person) || ($update)) {
// Lock the function to prevent race conditions if multiple items
// come in at the same time from a person who doesn't exist in
// fcontact
//
// Don't loop forever. On the last loop, try to create the contact
// whether the function is locked or not. Maybe the locking thread
// has died or something. At any rate, a duplicate in 'fcontact'
// is a much smaller problem than a deadlocked thread
$got_lock = lock_function('find_diaspora_person_by_handle', false);
if(($endlessloop + 1) >= $maxloops)
$got_lock = true;
if($got_lock) {
logger('find_diaspora_person_by_handle: create or refresh', LOGGER_DEBUG);
require_once('include/Scrape.php');
$r = probe_url($handle, PROBE_DIASPORA);
// Note that Friendica contacts can return a "Diaspora person"
// if Diaspora connectivity is enabled on their server
if((count($r)) && ($r['network'] === NETWORK_DIASPORA)) {
add_fcontact($r,$update);
$person = ($r);
}
unlock_function('find_diaspora_person_by_handle');
}
else {
logger('find_diaspora_person_by_handle: couldn\'t lock function', LOGGER_DEBUG);
if(! $person)
block_on_function_lock('find_diaspora_person_by_handle');
}
}
} while((! $person) && (! $got_lock) && (++$endlessloop < $maxloops));
// We need to try again if the person wasn't in 'fcontact' but the function was locked.
// The fact that the function was locked may mean that another process was creating the
// person's record. It could also mean another process was creating or updating an unrelated
// person.
//
// At any rate, we need to keep trying until we've either got the person or had a chance to
// try to fetch his/her remote information. But we don't want to block on locking the
// function, because if the other process is creating the record, then when we acquire the lock
// we'll dive right into creating another, duplicate record. We DO want to at least wait
// until the lock is released, so we don't flood the database with requests.
//
// If the person was in the 'fcontact' table, don't try again. It's not worth the time, since
// we do have some information for the person
return $person;
}
function get_diaspora_key($uri) {
logger('Fetching diaspora key for: ' . $uri);
$r = find_diaspora_person_by_handle($uri);
if($r)
return $r['pubkey'];
return '';
}
function diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey) {
$a = get_app();
logger('diaspora_pubmsg_build: ' . $msg, LOGGER_DATA);
$handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
// $b64_data = base64_encode($msg);
// $b64url_data = base64url_encode($b64_data);
$b64url_data = base64url_encode($msg);
$data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
$type = 'application/xml';
$encoding = 'base64url';
$alg = 'RSA-SHA256';
$signable_data = $data . '.' . base64url_encode($type) . '.'
. base64url_encode($encoding) . '.' . base64url_encode($alg) ;
$signature = rsa_sign($signable_data,$prvkey);
$sig = base64url_encode($signature);
$magic_env = <<< EOT
<?xml version='1.0' encoding='UTF-8'?>
<diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
<header>
<author_id>$handle</author_id>
</header>
<me:env>
<me:encoding>base64url</me:encoding>
<me:alg>RSA-SHA256</me:alg>
<me:data type="application/xml">$data</me:data>
<me:sig>$sig</me:sig>
</me:env>
</diaspora>
EOT;
logger('diaspora_pubmsg_build: magic_env: ' . $magic_env, LOGGER_DATA);
return $magic_env;
}
function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey,$public = false) {
$a = get_app();
if($public)
return diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey);
logger('diaspora_msg_build: ' . $msg, LOGGER_DATA);
// without a public key nothing will work
if(! $pubkey) {
logger('diaspora_msg_build: pubkey missing: contact id: ' . $contact['id']);
return '';
}
$inner_aes_key = random_string(32);
$b_inner_aes_key = base64_encode($inner_aes_key);
$inner_iv = random_string(16);
$b_inner_iv = base64_encode($inner_iv);
$outer_aes_key = random_string(32);
$b_outer_aes_key = base64_encode($outer_aes_key);
$outer_iv = random_string(16);
$b_outer_iv = base64_encode($outer_iv);
$handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
$padded_data = pkcs5_pad($msg,16);
$inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
$b64_data = base64_encode($inner_encrypted);
$b64url_data = base64url_encode($b64_data);
$data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
$type = 'application/xml';
$encoding = 'base64url';
$alg = 'RSA-SHA256';
$signable_data = $data . '.' . base64url_encode($type) . '.'
. base64url_encode($encoding) . '.' . base64url_encode($alg) ;
$signature = rsa_sign($signable_data,$prvkey);
$sig = base64url_encode($signature);
$decrypted_header = <<< EOT
<decrypted_header>
<iv>$b_inner_iv</iv>
<aes_key>$b_inner_aes_key</aes_key>
<author_id>$handle</author_id>
</decrypted_header>
EOT;
$decrypted_header = pkcs5_pad($decrypted_header,16);
$ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
$outer_json = json_encode(array('iv' => $b_outer_iv,'key' => $b_outer_aes_key));
$encrypted_outer_key_bundle = '';
openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey);
$b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
logger('outer_bundle: ' . $b64_encrypted_outer_key_bundle . ' key: ' . $pubkey, LOGGER_DATA);
$encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle),
'ciphertext' => base64_encode($ciphertext)));
$cipher_json = base64_encode($encrypted_header_json_object);
$encrypted_header = '<encrypted_header>' . $cipher_json . '</encrypted_header>';
$magic_env = <<< EOT
<?xml version='1.0' encoding='UTF-8'?>
<diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
$encrypted_header
<me:env>
<me:encoding>base64url</me:encoding>
<me:alg>RSA-SHA256</me:alg>
<me:data type="application/xml">$data</me:data>
<me:sig>$sig</me:sig>
</me:env>
</diaspora>
EOT;
logger('diaspora_msg_build: magic_env: ' . $magic_env, LOGGER_DATA);
return $magic_env;
}
/**
*
* diaspora_decode($importer,$xml)
* array $importer -> from user table
* string $xml -> urldecoded Diaspora salmon
*
* Returns array
* 'message' -> decoded Diaspora XML message
* 'author' -> author diaspora handle
* 'key' -> author public key (converted to pkcs#8)
*
* Author and key are used elsewhere to save a lookup for verifying replies and likes
*/
function diaspora_decode($importer,$xml) {
$public = false;
$basedom = parse_xml_string($xml);
$children = $basedom->children('https://joindiaspora.com/protocol');
if($children->header) {
$public = true;
$author_link = str_replace('acct:','',$children->header->author_id);
}
else {
$encrypted_header = json_decode(base64_decode($children->encrypted_header));
$encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
$ciphertext = base64_decode($encrypted_header->ciphertext);
$outer_key_bundle = '';
openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
$j_outer_key_bundle = json_decode($outer_key_bundle);
$outer_iv = base64_decode($j_outer_key_bundle->iv);
$outer_key = base64_decode($j_outer_key_bundle->key);
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
$decrypted = pkcs5_unpad($decrypted);
/**
* $decrypted now contains something like
*
* <decrypted_header>
* <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
* <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
***** OBSOLETE
* <author>
* <name>Ryan Hughes</name>
* <uri>acct:galaxor@diaspora.pirateship.org</uri>
* </author>
***** CURRENT
* <author_id>galaxor@diaspora.priateship.org</author_id>
***** END DIFFS
* </decrypted_header>
*/
logger('decrypted: ' . $decrypted, LOGGER_DEBUG);
$idom = parse_xml_string($decrypted,false);
$inner_iv = base64_decode($idom->iv);
$inner_aes_key = base64_decode($idom->aes_key);
$author_link = str_replace('acct:','',$idom->author_id);
}
$dom = $basedom->children(NAMESPACE_SALMON_ME);
// figure out where in the DOM tree our data is hiding
if($dom->provenance->data)
$base = $dom->provenance;
elseif($dom->env->data)
$base = $dom->env;
elseif($dom->data)
$base = $dom;
if(! $base) {
logger('mod-diaspora: unable to locate salmon data in xml ');
http_status_exit(400);
}
// Stash the signature away for now. We have to find their key or it won't be good for anything.
$signature = base64url_decode($base->sig);
// unpack the data
// strip whitespace so our data element will return to one big base64 blob
$data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
// stash away some other stuff for later
$type = $base->data[0]->attributes()->type[0];
$keyhash = $base->sig[0]->attributes()->keyhash[0];
$encoding = $base->encoding;
$alg = $base->alg;
$signed_data = $data . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
// decode the data
$data = base64url_decode($data);
if($public) {
$inner_decrypted = $data;
}
else {
// Decode the encrypted blob
$inner_encrypted = base64_decode($data);
$inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
$inner_decrypted = pkcs5_unpad($inner_decrypted);
}
if(! $author_link) {
logger('mod-diaspora: Could not retrieve author URI.');
http_status_exit(400);
}
// Once we have the author URI, go to the web and try to find their public key
// (first this will look it up locally if it is in the fcontact cache)
// This will also convert diaspora public key from pkcs#1 to pkcs#8
logger('mod-diaspora: Fetching key for ' . $author_link );
$key = get_diaspora_key($author_link);
if(! $key) {
logger('mod-diaspora: Could not retrieve author key.');
http_status_exit(400);
}
$verify = rsa_verify($signed_data,$signature,$key);
if(! $verify) {
logger('mod-diaspora: Message did not verify. Discarding.');
http_status_exit(400);
}
logger('mod-diaspora: Message verified.');
return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
}
function diaspora_request($importer,$xml) {
$a = get_app();
$sender_handle = unxmlify($xml->sender_handle);
$recipient_handle = unxmlify($xml->recipient_handle);
if(! $sender_handle || ! $recipient_handle)
return;
$contact = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
if($contact) {
// perhaps we were already sharing with this person. Now they're sharing with us.
// That makes us friends.
if($contact['rel'] == CONTACT_IS_FOLLOWER && $importer['page-flags'] != PAGE_COMMUNITY) {
q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d LIMIT 1",
intval(CONTACT_IS_FRIEND),
intval($contact['id']),
intval($importer['uid'])
);
}
// send notification
$r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
intval($importer['uid'])
);
if((count($r)) && (! $r[0]['hide-friends']) && (! $contact['hidden'])) {
require_once('include/items.php');
$self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
intval($importer['uid'])
);
// they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
if(count($self) && $contact['rel'] == CONTACT_IS_FOLLOWER) {
$arr = array();
$arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $importer['uid']);
$arr['uid'] = $importer['uid'];
$arr['contact-id'] = $self[0]['id'];
$arr['wall'] = 1;
$arr['type'] = 'wall';
$arr['gravity'] = 0;
$arr['origin'] = 1;
$arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
$arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
$arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
$arr['verb'] = ACTIVITY_FRIEND;
$arr['object-type'] = ACTIVITY_OBJ_PERSON;
$A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
$B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
$BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
$arr['body'] = sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
$arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
. '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
$arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
$arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
$arr['object'] .= '</link></object>' . "\n";
$arr['last-child'] = 1;
$arr['allow_cid'] = $user[0]['allow_cid'];
$arr['allow_gid'] = $user[0]['allow_gid'];
$arr['deny_cid'] = $user[0]['deny_cid'];
$arr['deny_gid'] = $user[0]['deny_gid'];
$i = item_store($arr);
if($i)
proc_run('php',"include/notifier.php","activity","$i");
}
}
return;
}
$ret = find_diaspora_person_by_handle($sender_handle);
if((! count($ret)) || ($ret['network'] != NETWORK_DIASPORA)) {
logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle);
return;
}
$batch = (($ret['batch']) ? $ret['batch'] : implode('/', array_slice(explode('/',$ret['url']),0,3)) . '/receive/public');
$r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
VALUES ( %d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d) ",
intval($importer['uid']),
dbesc($ret['network']),
dbesc($ret['addr']),
datetime_convert(),
dbesc($ret['url']),
dbesc(normalise_link($ret['url'])),
dbesc($batch),
dbesc($ret['name']),
dbesc($ret['nick']),
dbesc($ret['photo']),
dbesc($ret['pubkey']),
dbesc($ret['notify']),
dbesc($ret['poll']),
1,
2
);
// find the contact record we just created
$contact_record = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
if(! $contact_record) {
logger('diaspora_request: unable to locate newly created contact record.');
return;
}
$g = q("select def_gid from user where uid = %d limit 1",
intval($importer['uid'])
);
if($g && intval($g[0]['def_gid'])) {
require_once('include/group.php');
group_add_member($importer['uid'],'',$contact_record['id'],$g[0]['def_gid']);
}
if($importer['page-flags'] == PAGE_NORMAL) {
$hash = random_string() . (string) time(); // Generate a confirm_key
$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime` )
VALUES ( %d, %d, %d, %d, '%s', '%s', '%s' )",
intval($importer['uid']),
intval($contact_record['id']),
0,
0,
dbesc( t('Sharing notification from Diaspora network')),
dbesc($hash),
dbesc(datetime_convert())
);
}
else {
// automatic friend approval
require_once('include/Photo.php');
$photos = import_profile_photo($contact_record['photo'],$importer['uid'],$contact_record['id']);
// technically they are sharing with us (CONTACT_IS_SHARING),
// but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
// we are going to change the relationship and make them a follower.
if($importer['page-flags'] == PAGE_FREELOVE)
$new_relation = CONTACT_IS_FRIEND;
else
$new_relation = CONTACT_IS_FOLLOWER;
$r = q("UPDATE `contact` SET
`photo` = '%s',
`thumb` = '%s',
`micro` = '%s',
`rel` = %d,
`name-date` = '%s',
`uri-date` = '%s',
`avatar-date` = '%s',
`blocked` = 0,
`pending` = 0
WHERE `id` = %d LIMIT 1
",
dbesc($photos[0]),
dbesc($photos[1]),
dbesc($photos[2]),
intval($new_relation),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
intval($contact_record['id'])
);
$u = q("select * from user where uid = %d limit 1",intval($importer['uid']));
if($u)
$ret = diaspora_share($u[0],$contact_record);
}
return;
}
function diaspora_post_allow($importer,$contact) {
if(($contact['blocked']) || ($contact['readonly']))
return false;
if($contact['rel'] == CONTACT_IS_SHARING || $contact['rel'] == CONTACT_IS_FRIEND)
return true;
if($contact['rel'] == CONTACT_IS_FOLLOWER)
if($importer['page-flags'] == PAGE_COMMUNITY)
return true;
return false;
}
function diaspora_post($importer,$xml,$msg) {
$a = get_app();
$guid = notags(unxmlify($xml->guid));
$diaspora_handle = notags(unxmlify($xml->diaspora_handle));
if($diaspora_handle != $msg['author']) {
logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
return 202;
}
$contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
if(! $contact)
return;
if(! diaspora_post_allow($importer,$contact)) {
logger('diaspora_post: Ignoring this author.');
return 202;
}
$message_id = $diaspora_handle . ':' . $guid;
$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
intval($importer['uid']),
dbesc($message_id),
dbesc($guid)
);
if(count($r)) {
logger('diaspora_post: message exists: ' . $guid);
return;
}
// allocate a guid on our system - we aren't fixing any collisions.
// we're ignoring them
$g = q("select * from guid where guid = '%s' limit 1",
dbesc($guid)
);
if(! count($g)) {
q("insert into guid ( guid ) values ( '%s' )",
dbesc($guid)
);
}
$created = unxmlify($xml->created_at);
$private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
$body = diaspora2bb($xml->raw_message);
$datarray = array();
$str_tags = '';
$tags = get_tags($body);
if(count($tags)) {
foreach($tags as $tag) {
if(strpos($tag,'#') === 0) {
if(strpos($tag,'[url='))
continue;
// don't link tags that are already embedded in links
if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body))
continue;
if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body))
continue;
$basetag = str_replace('_',' ',substr($tag,1));
$body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body);
if(strlen($str_tags))
$str_tags .= ',';
$str_tags .= '#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
continue;
}
}
}
$cnt = preg_match_all('/@\[url=(.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
if($cnt) {
foreach($matches as $mtch) {
if(strlen($str_tags))
$str_tags .= ',';
$str_tags .= '@[url=' . $mtch[1] . '[/url]';
}
}
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $contact['id'];
$datarray['wall'] = 0;
$datarray['guid'] = $guid;
$datarray['uri'] = $datarray['parent-uri'] = $message_id;
$datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
$datarray['private'] = $private;
$datarray['parent'] = 0;
$datarray['owner-name'] = $contact['name'];
$datarray['owner-link'] = $contact['url'];
$datarray['owner-avatar'] = $contact['thumb'];
$datarray['author-name'] = $contact['name'];
$datarray['author-link'] = $contact['url'];
$datarray['author-avatar'] = $contact['thumb'];
$datarray['body'] = $body;
$datarray['tag'] = $str_tags;
$datarray['app'] = 'Diaspora';
// if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible.
$datarray['visible'] = ((strlen($body)) ? 1 : 0);
$message_id = item_store($datarray);
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)
);
}
return;
}
function diaspora_reshare($importer,$xml,$msg) {
logger('diaspora_reshare: init: ' . print_r($xml,true));
$a = get_app();
$guid = notags(unxmlify($xml->guid));
$diaspora_handle = notags(unxmlify($xml->diaspora_handle));
if($diaspora_handle != $msg['author']) {
logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
return 202;
}
$contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
if(! $contact)
return;
if(! diaspora_post_allow($importer,$contact)) {
logger('diaspora_reshare: Ignoring this author: ' . $diaspora_handle . ' ' . print_r($xml,true));
return 202;
}
$message_id = $diaspora_handle . ':' . $guid;
$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `guid` = '%s' LIMIT 1",
intval($importer['uid']),
dbesc($message_id),
dbesc($guid)
);
if(count($r)) {
logger('diaspora_reshare: message exists: ' . $guid);
return;
}
$orig_author = notags(unxmlify($xml->root_diaspora_id));
$orig_guid = notags(unxmlify($xml->root_guid));
$source_url = 'https://' . substr($orig_author,strpos($orig_author,'@')+1) . '/p/' . $orig_guid . '.xml';
$x = fetch_url($source_url);
if(! $x)
$x = fetch_url(str_replace('https://','http://',$source_url));
if(! $x) {
logger('diaspora_reshare: unable to fetch source url ' . $source_url);
return;
}
logger('diaspora_reshare: source: ' . $x);
$x = str_replace(array('<activity_streams-photo>','</activity_streams-photo>'),array('<asphoto>','</asphoto>'),$x);
$source_xml = parse_xml_string($x,false);
if(strlen($source_xml->post->asphoto->objectId) && ($source_xml->post->asphoto->objectId != 0) && ($source_xml->post->asphoto->image_url)) {
$body = '[url=' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '][img]' . notags(unxmlify($source_xml->post->asphoto->objectId)) . '[/img][/url]' . "\n";
$body = scale_external_images($body,false);
}
elseif($source_xml->post->asphoto->image_url) {
$body = '[img]' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '[/img]' . "\n";
$body = scale_external_images($body);
}
elseif($source_xml->post->status_message) {
$body = diaspora2bb($source_xml->post->status_message->raw_message);
$body = scale_external_images($body);
}
else {
logger('diaspora_reshare: no reshare content found: ' . print_r($source_xml,true));
return;
}
if(! $body) {
logger('diaspora_reshare: empty body: source= ' . $x);
return;
}
$person = find_diaspora_person_by_handle($orig_author);
if(is_array($person) && x($person,'name') && x($person,'url'))
$details = '[url=' . $person['url'] . ']' . $person['name'] . '[/url]';
else
$details = $orig_author;
$prefix = html_entity_decode("♲ ", ENT_QUOTES, 'UTF-8') . $details . "\n";
// allocate a guid on our system - we aren't fixing any collisions.
// we're ignoring them
$g = q("select * from guid where guid = '%s' limit 1",
dbesc($guid)
);
if(! count($g)) {
q("insert into guid ( guid ) values ( '%s' )",
dbesc($guid)
);
}
$created = unxmlify($xml->created_at);
$private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
$datarray = array();
$str_tags = '';
$tags = get_tags($body);
if(count($tags)) {
foreach($tags as $tag) {
if(strpos($tag,'#') === 0) {
if(strpos($tag,'[url='))
continue;
// don't link tags that are already embedded in links
if(preg_match('/\[(.*?)' . preg_quote($tag,'/') . '(.*?)\]/',$body))
continue;
if(preg_match('/\[(.*?)\]\((.*?)' . preg_quote($tag,'/') . '(.*?)\)/',$body))
continue;
$basetag = str_replace('_',' ',substr($tag,1));
$body = str_replace($tag,'#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]',$body);
if(strlen($str_tags))
$str_tags .= ',';
$str_tags .= '#[url=' . $a->get_baseurl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
continue;
}
}