lainchan/boardlink/main.php

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<?php
/*
* Copyright (c) 2014 Marcin Łabanowski
*/
if (isset ($brd) && !defined("TINYBOARD")) {
define("BOARDLINK_IN", "callback");
require_once("inc/functions.php");
}
else if (defined ("TINYBOARD")) {
define("BOARDLINK_IN", "config");
}
else {
die("Access denied");
}
// Version history (protocol compatibility):
// 1 - initial version
define("BOARDLINK_VERSION", "1");
$delete_from = false;
class BoardLink {
function __construct($boardname, $self, $connected) {
$this->boardname = $boardname;
$this->self = $self;
$this->connected = $connected;
$this->queue = array();
}
function send_data($uri, $password, $data) {
ignore_user_abort(true); // this is a critical code, we don't want users to desync boards
// by quitting at a random moment
$d = http_build_query(array('password' => $password,
'from' => $this->self,
'version' => BOARDLINK_VERSION,
'data' => serialize($data)));
$ctx = stream_context_create(array('http' => array(
'method' => 'POST',
'header' => "Content-type: application/x-www-form-urlencoded\r\n".
"Content-length: ".strlen($d)."\r\n",
'content' => $d)));
$this->queue[] = array($ctx, $uri, $data['action']);
}
function commit_send_as_last() {
register_shutdown_function(array($this, "commit_send"));
}
function commit_send() {
global $request_finished;
if (function_exists("fastcgi_finish_request") && !isset($request_finished)) {
fastcgi_finish_request(); // hooray! php-fpm!
$request_finished = true;
}
foreach ($this->queue as $value) {
list($ctx, $uri, $action) = $value;
$fp = file_get_contents($uri.'callback.php', false, $ctx);
_syslog(LOG_INFO, "BoardLink: sent query of type $action from {$this->self} to $uri. Query yielded $fp");
}
$this->queue = array();
}
function configure_board() {
global $config;
$config['blotter'] = "This board is synchronized with ";
$a = array_values($this->connected);
array_walk($a, function(&$v, $k){
$v = "<a href=\"$v\">$v</a>";
});
$count = count($a);
if ($count == 0) {
$synced = '';
} elseif ($count == 1) {
$synced = $a[0];
} else {
$synced = implode(', ', array_slice($a,0,$count-1)) . ' and ' . end($a);
}
$config['blotter'] .= $synced;
if ($config['vichan_federation']) {
if ($config['locale'] != "en") {
$config['locale'] = "en";
$config['file_script'] = "main-en.js";
}
$config['country_flags'] = true;
}
event_handler('delete', function($post) {
global $delete_from;
$data = array();
$data['action'] = 'delete';
$data['post'] = $post;
foreach ($this->connected as $password => $uri) {
if (!$delete_from || $delete_from != $uri) {
$this->send_data($uri, $password, $data);
}
}
register_shutdown_function(array($this, "commit_send_as_last"));
});
event_handler('post-after', function($post) {
$data = array();
$data['action'] = 'create';
if (!isset ($post['ip'])) $post['ip'] = $_SERVER['REMOTE_ADDR'];
$data['post'] = $post;
foreach ($this->connected as $password => $uri) {
if (!isset($data['post']['origin']) || $data['post']['origin'] != $uri) {
$this->send_data($uri, $password, $data);
}
}
register_shutdown_function(array($this, "commit_send_as_last"));
});
}
function handle_error($err, $from, $sort) {
_syslog(LOG_INFO, "BoardLink: received query of type $sort from $from to {$this->self}. Query finished with $err");
die('{status:"'.$err.'",version:"'.BOARDLINK_VERSION.'"}');
}
function configure_callback() {
global $board, $config, $delete_from, $build_pages, $pdo;
if (!isset ($_POST['password'])) {
$this->handle_error("ERR_NOREQUEST", "nil", "nil");
}
if (!isset ($this->connected[$_POST['password']])) {
$this->handle_error("ERR_PASSWD", $_POST['from'], "nil");
}
$uri = $this->connected[$_POST['password']];
if ($uri != $_POST['from']) {
$this->handle_error("ERR_FROM", $_POST['from'], "nil");
}
$data = unserialize($_POST['data']);
openBoard($this->boardname);
switch ($data['action']) {
case 'create':
//Check if thread exists
if (!$data['post']['op']) {
$query = prepare(sprintf("SELECT `sticky`,`locked`,`sage` FROM ``posts_%s`` WHERE `id` = :id AND `thread` IS NULL LIMIT 1", $board['uri']));
$query->bindValue(':id', $data['post']['thread'], PDO::PARAM_INT);
$query->execute() or error(db_error());
if (!$thread = $query->fetch(PDO::FETCH_ASSOC)) {
$this->handle_error("ERR_DESYNC", $uri, $data['action']);
}
$numposts = numPosts($data['post']['thread']);
}
$a = array("src" => "file", "thumb" => "thumb");
foreach ($a as $dir => $field) {
if (isset($data['post'][$field]) && $data['post'][$field] &&
$data['post'][$field] != 'spoiler' && $data['post'][$field] != 'deleted') {
// Security filename checks
if (preg_match('@\.php|\.phtml|\.ht|\.\.|\x00|/@i', $data['post'][$field])) {
$this->handle_error("ERR_SECURITY", $uri, $data['action']);
}
$i = file_get_contents($uri.$dir.'/'.$data['post'][$field]);
file_put_contents($this->boardname.'/'.$dir.'/'.$data['post'][$field], $i);
}
}
$tmpid = post($data['post']);
// Post doesn't cover custom post IDs
$query = prepare(sprintf("UPDATE ``posts_%s`` SET `id`=:id WHERE `id`=:tmpid", $board['uri']));
$query->bindValue("id", $id = $data['post']['id']);
$query->bindValue("tmpid", $tmpid);
if (!$query->execute()) {
$query = prepare(sprintf("DELETE FROM ``posts_%s`` WHERE `id`=:tmpid", $board['uri']));
$query->bindValue("tmpid", $tmpid);
$query->execute();
// Reset the auto increment
query(sprintf("ALTER TABLE ``posts_%s`` AUTO_INCREMENT = 1", $board['uri']));
$this->handle_error("ERR_DUPLICATE_ID", $uri, $data['action']);
}
// Reset the auto increment
query(sprintf("ALTER TABLE ``posts_%s`` AUTO_INCREMENT = 1", $board['uri']));
$post = &$data['post'];
$post['origin'] = $uri;
// The rest is just a copied code from post.php
if (isset($post['tracked_cites']) && !empty($post['tracked_cites'])) {
$insert_rows = array();
foreach ($post['tracked_cites'] as $cite) {
$insert_rows[] = '(' .
$pdo->quote($board['uri']) . ', ' . (int)$id . ', ' .
$pdo->quote($cite[0]) . ', ' . (int)$cite[1] . ')';
}
query('INSERT INTO ``cites`` VALUES ' . implode(', ', $insert_rows)) or error(db_error());
}
if (!$post['op'] && strtolower($post['email']) != 'sage' && !$thread['sage'] && ($config['reply_limit'] == 0
|| $numposts['replies']+1 < $config['reply_limit'])) {
bumpThread($post['thread']);
}
buildThread($post['op'] ? $id : $post['thread']);
if ($config['try_smarter'] && $post['op'])
$build_pages = range(1, $config['max_pages']);
if ($post['op'])
clean();
event('post-after', $post);
buildIndex();
if ($post['op'])
rebuildThemes('post-thread', $board['uri']);
else
rebuildThemes('post', $board['uri']);
break;
case 'delete':
$delete_from = $uri;
deletePost($data['post']['id'], false);
$delete_from = false;
buildIndex();
rebuildThemes('post-delete', $board['uri']);
break;
default:
$this->handle_error("ERR_UNSUPPORTED", $uri, $data['action']);
}
$this->handle_error("OK", $uri, $data['action']);
}
}
?>