friendica/include/diaspora2.php
2016-02-27 23:54:17 +01:00

638 lines
19 KiB
PHP

<?php
/**
* @file include/diaspora.php
* @brief The implementation of the diaspora protocol
*/
require_once("include/diaspora.php");
require_once("include/Scrape.php");
function array_to_xml($array, &$xml) {
if (!is_object($xml)) {
foreach($array as $key => $value) {
$root = new SimpleXMLElement('<'.$key.'/>');
array_to_xml($value, $root);
$dom = dom_import_simplexml($root)->ownerDocument;
$dom->formatOutput = true;
return $dom->saveXML();
}
}
foreach($array as $key => $value) {
if (!is_array($value) AND !is_numeric($key))
$xml->addChild($key, $value);
elseif (is_array($value))
array_to_xml($value, $xml->addChild($key));
}
}
/**
* @brief This class contain functions to create and send DFRN XML files
*
*/
class diaspora {
public static function dispatch_public($msg) {
$enabled = intval(get_config("system", "diaspora_enabled"));
if (!$enabled) {
logger('diaspora is disabled');
return false;
}
// Use a dummy importer to import the data for the public copy
$importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
self::dispatch($importer,$msg);
// Now distribute it to the followers
$r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
(SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s')
AND NOT `account_expired` AND NOT `account_removed`",
dbesc(NETWORK_DIASPORA),
dbesc($msg["author"])
);
if(count($r)) {
foreach($r as $rr) {
logger("delivering to: ".$rr["username"]);
self::dispatch($rr,$msg);
}
} else
logger("No subscribers for ".$msg["author"]." ".print_r($msg, true));
}
public static function dispatch($importer, $msg) {
// The sender is the handle of the contact that sent the message.
// This will often be different with relayed messages (for example "like" and "comment")
$sender = $msg->author;
if (!diaspora::valid_posting($msg, $fields)) {
logger("Invalid posting");
return false;
}
$type = $fields->getName();
switch ($type) {
case "account_deletion":
return self::import_account_deletion($importer, $fields);
case "comment":
return self::import_comment($importer, $sender, $fields);
case "conversation":
return self::import_conversation($importer, $fields);
case "like":
return self::import_like($importer, $sender, $fields);
case "message":
return self::import_message($importer, $fields);
case "participation":
return self::import_participation($importer, $fields);
case "photo":
return self::import_photo($importer, $fields);
case "poll_participation":
return self::import_poll_participation($importer, $fields);
case "profile":
return self::import_profile($importer, $fields);
case "request":
return self::import_request($importer, $fields);
case "reshare":
return self::import_reshare($importer, $fields);
case "retraction":
return self::import_retraction($importer, $fields);
case "status_message":
return self::import_status_message($importer, $fields);
default:
logger("Unknown message type ".$type);
return false;
}
return true;
}
/**
* @brief Checks if a posting is valid and fetches the data fields.
*
* This function does not only check the signature.
* It also does the conversion between the old and the new diaspora format.
*
* @param array $msg Array with the XML, the sender handle and the sender signature
* @param object $fields SimpleXML object that contains the posting
*
* @return bool Is the posting valid?
*/
private function valid_posting($msg, &$fields) {
$data = parse_xml_string($msg->message, false);
$first_child = $data->getName();
if ($data->getName() == "XML") {
$oldXML = true;
foreach ($data->post->children() as $child)
$element = $child;
} else {
$oldXML = false;
$element = $data;
}
$type = $element->getName();
if (in_array($type, array("signed_retraction", "relayable_retraction")))
$type = "retraction";
$fields = new SimpleXMLElement("<".$type."/>");
$signed_data = "";
foreach ($element->children() AS $fieldname => $data) {
if ($oldXML) {
// Translation for the old XML structure
if ($fieldname == "diaspora_handle")
$fieldname = "author";
if ($fieldname == "participant_handles")
$fieldname = "participants";
if (in_array($type, array("like", "participation"))) {
if ($fieldname == "target_type")
$fieldname = "parent_type";
}
if ($fieldname == "sender_handle")
$fieldname = "author";
if ($fieldname == "recipient_handle")
$fieldname = "recipient";
if ($fieldname == "root_diaspora_id")
$fieldname = "root_author";
if ($type == "retraction") {
if ($fieldname == "post_guid")
$fieldname = "target_guid";
if ($fieldname == "type")
$fieldname = "target_type";
}
}
if ($fieldname == "author_signature")
$author_signature = base64_decode($data);
elseif ($fieldname == "parent_author_signature")
$parent_author_signature = base64_decode($data);
elseif ($fieldname != "target_author_signature") {
if ($signed_data != "") {
$signed_data .= ";";
$signed_data_parent .= ";";
}
$signed_data .= $data;
$fields->$fieldname = $data;
}
}
if (in_array($type, array("status_message", "reshare")))
if ($msg->author != $fields->author) {
logger("Message handle is not the same as envelope sender. Quitting this message.");
return false;
}
if (!in_array($type, array("comment", "conversation", "message", "like")))
return true;
if (!isset($author_signature))
return false;
if (isset($parent_author_signature)) {
$key = self::get_key($msg->author);
if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256"))
return false;
}
$key = self::get_key($fields->author);
return rsa_verify($signed_data, $author_signature, $key, "sha256");
}
private function get_key($handle) {
logger("Fetching diaspora key for: ".$handle);
$r = self::get_person_by_handle($handle);
if($r)
return $r["pubkey"];
return "";
}
private function get_person_by_handle($handle) {
$r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
dbesc(NETWORK_DIASPORA),
dbesc($handle)
);
if (count($r)) {
$person = $r[0];
logger("In cache ".print_r($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"))
$update = true;
}
if (!$person OR $update) {
logger("create or refresh", LOGGER_DEBUG);
$r = probe_url($handle, PROBE_DIASPORA);
// Note that Friendica contacts will return a "Diaspora person"
// if Diaspora connectivity is enabled on their server
if (count($r) AND ($r["network"] === NETWORK_DIASPORA)) {
self::add_fcontact($r, $update);
$person = $r;
}
}
return $person;
}
private function add_fcontact($arr, $update = false) {
/// @todo Remove this function from include/network.php
if($update) {
$r = q("UPDATE `fcontact` SET
`name` = '%s',
`photo` = '%s',
`request` = '%s',
`nick` = '%s',
`addr` = '%s',
`batch` = '%s',
`notify` = '%s',
`poll` = '%s',
`confirm` = '%s',
`alias` = '%s',
`pubkey` = '%s',
`updated` = '%s'
WHERE `url` = '%s' AND `network` = '%s'",
dbesc($arr["name"]),
dbesc($arr["photo"]),
dbesc($arr["request"]),
dbesc($arr["nick"]),
dbesc($arr["addr"]),
dbesc($arr["batch"]),
dbesc($arr["notify"]),
dbesc($arr["poll"]),
dbesc($arr["confirm"]),
dbesc($arr["alias"]),
dbesc($arr["pubkey"]),
dbesc(datetime_convert()),
dbesc($arr["url"]),
dbesc($arr["network"])
);
} else {
$r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`,
`batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`)
VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",
dbesc($arr["url"]),
dbesc($arr["name"]),
dbesc($arr["photo"]),
dbesc($arr["request"]),
dbesc($arr["nick"]),
dbesc($arr["addr"]),
dbesc($arr["batch"]),
dbesc($arr["notify"]),
dbesc($arr["poll"]),
dbesc($arr["confirm"]),
dbesc($arr["network"]),
dbesc($arr["alias"]),
dbesc($arr["pubkey"]),
dbesc(datetime_convert())
);
}
return $r;
}
private function get_contact_by_handle($uid, $handle) {
$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
intval($uid),
dbesc($handle)
);
if ($r AND count($r))
return $r[0];
$handle_parts = explode("@", $handle);
$nurl_sql = '%%://' . $handle_parts[1] . '%%/profile/' . $handle_parts[0];
$r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `nurl` LIKE '%s' LIMIT 1",
dbesc(NETWORK_DFRN),
intval($uid),
dbesc($nurl_sql)
);
if($r AND count($r))
return $r[0];
return false;
}
/*
function DiasporaFetchGuid($item) {
preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
function ($match) use ($item){
return(DiasporaFetchGuidSub($match, $item));
},$item["body"]);
}
function DiasporaFetchGuidSub($match, $item) {
$a = get_app();
if (!diaspora_store_by_guid($match[1], $item["author-link"]))
diaspora_store_by_guid($match[1], $item["owner-link"]);
}
function diaspora_store_by_guid($guid, $server, $uid = 0) {
require_once("include/Contact.php");
$serverparts = parse_url($server);
$server = $serverparts["scheme"]."://".$serverparts["host"];
logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
$item = diaspora_fetch_message($guid, $server);
if (!$item)
return false;
logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
$body = $item["body"];
$str_tags = $item["tag"];
$app = $item["app"];
$created = $item["created"];
$author = $item["author"];
$guid = $item["guid"];
$private = $item["private"];
$object = $item["object"];
$objecttype = $item["object-type"];
$message_id = $author.':'.$guid;
$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($uid),
dbesc($guid)
);
if(count($r))
return $r[0]["id"];
$person = find_diaspora_person_by_handle($author);
$contact_id = get_contact($person['url'], $uid);
$contacts = q("SELECT * FROM `contact` WHERE `id` = %d", intval($contact_id));
$importers = q("SELECT * FROM `user` WHERE `uid` = %d", intval($uid));
if ($contacts AND $importers)
if(!diaspora_post_allow($importers[0],$contacts[0], false)) {
logger('Ignoring author '.$person['url'].' for uid '.$uid);
return false;
} else
logger('Author '.$person['url'].' is allowed for uid '.$uid);
$datarray = array();
$datarray['uid'] = $uid;
$datarray['contact-id'] = $contact_id;
$datarray['wall'] = 0;
$datarray['network'] = NETWORK_DIASPORA;
$datarray['guid'] = $guid;
$datarray['uri'] = $datarray['parent-uri'] = $message_id;
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
$datarray['private'] = $private;
$datarray['parent'] = 0;
$datarray['plink'] = diaspora_plink($author, $guid);
$datarray['author-name'] = $person['name'];
$datarray['author-link'] = $person['url'];
$datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
$datarray['owner-name'] = $datarray['author-name'];
$datarray['owner-link'] = $datarray['author-link'];
$datarray['owner-avatar'] = $datarray['author-avatar'];
$datarray['body'] = $body;
$datarray['tag'] = $str_tags;
$datarray['app'] = $app;
$datarray['visible'] = ((strlen($body)) ? 1 : 0);
$datarray['object'] = $object;
$datarray['object-type'] = $objecttype;
if ($datarray['contact-id'] == 0)
return false;
DiasporaFetchGuid($datarray);
$message_id = item_store($datarray);
/// @TODO
/// Looking if there is some subscribe mechanism in Diaspora to get all comments for this post
return $message_id;
}
*/
private function import_account_deletion($importer, $data) {
return true;
}
private function import_comment($importer, $sender, $data) {
$guid = notags(unxmlify($data->guid));
$parent_guid = notags(unxmlify($data->parent_guid));
$text = unxmlify($data->text);
$author = notags(unxmlify($data->author));
$contact = self::get_contact_by_handle($importer["uid"], $sender);
if (!$contact) {
logger("cannot find contact for sender: ".$sender);
return false;
}
/*
if(! diaspora_post_allow($importer,$contact, true)) {
logger('diaspora_comment: Ignoring this author.');
return 202;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($importer['uid']),
dbesc($guid)
);
if(count($r)) {
logger('diaspora_comment: our comment just got relayed back to us (or there was a guid collision) : ' . $guid);
return;
}
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($importer['uid']),
dbesc($parent_guid)
);
if(!count($r)) {
$result = diaspora_store_by_guid($parent_guid, $contact['url'], $importer['uid']);
if (!$result) {
$person = find_diaspora_person_by_handle($diaspora_handle);
$result = diaspora_store_by_guid($parent_guid, $person['url'], $importer['uid']);
}
if ($result) {
logger("Fetched missing item ".$parent_guid." - result: ".$result, LOGGER_DEBUG);
$r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
intval($importer['uid']),
dbesc($parent_guid)
);
}
}
if(! count($r)) {
logger('diaspora_comment: parent item not found: parent: ' . $parent_guid . ' item: ' . $guid);
return;
}
$parent_item = $r[0];
// Find the original comment author information.
// We need this to make sure we display the comment author
// information (name and avatar) correctly.
if(strcasecmp($diaspora_handle,$msg['author']) == 0)
$person = $contact;
else {
$person = find_diaspora_person_by_handle($diaspora_handle);
if(! is_array($person)) {
logger('diaspora_comment: unable to find author details');
return;
}
}
// Fetch the contact id - if we know this contact
$r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
dbesc(normalise_link($person['url'])), intval($importer['uid']));
if ($r) {
$cid = $r[0]['id'];
$network = $r[0]['network'];
} else {
$cid = $contact['id'];
$network = NETWORK_DIASPORA;
}
$body = diaspora2bb($text);
$message_id = $diaspora_handle . ':' . $guid;
$datarray = array();
$datarray['uid'] = $importer['uid'];
$datarray['contact-id'] = $cid;
$datarray['type'] = 'remote-comment';
$datarray['wall'] = $parent_item['wall'];
$datarray['network'] = $network;
$datarray['verb'] = ACTIVITY_POST;
$datarray['gravity'] = GRAVITY_COMMENT;
$datarray['guid'] = $guid;
$datarray['uri'] = $message_id;
$datarray['parent-uri'] = $parent_item['uri'];
// No timestamps for comments? OK, we'll the use current time.
$datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert();
$datarray['private'] = $parent_item['private'];
$datarray['owner-name'] = $parent_item['owner-name'];
$datarray['owner-link'] = $parent_item['owner-link'];
$datarray['owner-avatar'] = $parent_item['owner-avatar'];
$datarray['author-name'] = $person['name'];
$datarray['author-link'] = $person['url'];
$datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
$datarray['body'] = $body;
$datarray["object"] = json_encode($xml);
$datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
// We can't be certain what the original app is if the message is relayed.
if(($parent_item['origin']) && (! $parent_author_signature))
$datarray['app'] = 'Diaspora';
DiasporaFetchGuid($datarray);
$message_id = item_store($datarray);
$datarray['id'] = $message_id;
// If we are the origin of the parent we store the original signature and notify our followers
if($parent_item['origin']) {
$author_signature_base64 = base64_encode($author_signature);
$author_signature_base64 = diaspora_repair_signature($author_signature_base64, $diaspora_handle);
q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
intval($message_id),
dbesc($signed_data),
dbesc($author_signature_base64),
dbesc($diaspora_handle)
);
// notify others
proc_run('php','include/notifier.php','comment-import',$message_id);
}
*/
return true;
}
private function import_conversation($importer, $data) {
return true;
}
private function import_like($importer, $sender, $data) {
return true;
}
private function import_message($importer, $data) {
return true;
}
private function import_participation($importer, $data) {
return true;
}
private function import_photo($importer, $data) {
return true;
}
private function import_poll_participation($importer, $data) {
return true;
}
private function import_profile($importer, $data) {
return true;
}
private function import_request($importer, $data) {
return true;
}
private function import_reshare($importer, $data) {
return true;
}
private function import_retraction($importer, $data) {
return true;
}
private function import_status_message($importer, $data) {
return true;
}
}
?>