mirror of
https://github.com/PrivateBin/PrivateBin.git
synced 2024-12-30 09:46:15 -05:00
410 lines
12 KiB
PHP
410 lines
12 KiB
PHP
<?php
|
|
/**
|
|
* ZeroBin
|
|
*
|
|
* a zero-knowledge paste bin
|
|
*
|
|
* @link http://sebsauvage.net/wiki/doku.php?id=php:zerobin
|
|
* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
|
|
* @license http://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
|
|
* @version 0.20
|
|
*/
|
|
|
|
/**
|
|
* zerobin_db
|
|
*
|
|
* Model for DB access, implemented as a singleton.
|
|
*/
|
|
class zerobin_db extends zerobin_abstract
|
|
{
|
|
/**
|
|
* cache for select queries
|
|
*
|
|
* @var array
|
|
*/
|
|
private static $_cache = array();
|
|
|
|
/**
|
|
* instance of database connection
|
|
*
|
|
* @access private
|
|
* @static
|
|
* @var PDO
|
|
*/
|
|
private static $_db;
|
|
|
|
/**
|
|
* table prefix
|
|
*
|
|
* @access private
|
|
* @static
|
|
* @var string
|
|
*/
|
|
private static $_prefix = '';
|
|
|
|
/**
|
|
* database type
|
|
*
|
|
* @access private
|
|
* @static
|
|
* @var string
|
|
*/
|
|
private static $_type = '';
|
|
|
|
/**
|
|
* get instance of singleton
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @param array $options
|
|
* @throws Exception
|
|
* @return zerobin_db
|
|
*/
|
|
public static function getInstance($options = null)
|
|
{
|
|
// if needed initialize the singleton
|
|
if(!(self::$_instance instanceof zerobin_db)) {
|
|
self::$_instance = new self;
|
|
}
|
|
|
|
if (is_array($options))
|
|
{
|
|
// set table prefix if given
|
|
if (array_key_exists('tbl', $options)) self::$_prefix = $options['tbl'];
|
|
|
|
// initialize the db connection with new options
|
|
if (
|
|
array_key_exists('dsn', $options) &&
|
|
array_key_exists('usr', $options) &&
|
|
array_key_exists('pwd', $options) &&
|
|
array_key_exists('opt', $options)
|
|
)
|
|
{
|
|
// check if the database contains the required tables
|
|
self::$_type = strtolower(
|
|
substr($options['dsn'], 0, strpos($options['dsn'], ':'))
|
|
);
|
|
switch(self::$_type)
|
|
{
|
|
case 'ibm':
|
|
$sql = 'SELECT tabname FROM SYSCAT.TABLES ';
|
|
break;
|
|
case 'informix':
|
|
$sql = 'SELECT tabname FROM systables ';
|
|
break;
|
|
case 'mssql':
|
|
$sql = "SELECT name FROM sysobjects "
|
|
. "WHERE type = 'U' ORDER BY name";
|
|
break;
|
|
case 'mysql':
|
|
$sql = 'SHOW TABLES';
|
|
break;
|
|
case 'oci':
|
|
$sql = 'SELECT table_name FROM all_tables';
|
|
break;
|
|
case 'pgsql':
|
|
$sql = "SELECT c.relname AS table_name "
|
|
. "FROM pg_class c, pg_user u "
|
|
. "WHERE c.relowner = u.usesysid AND c.relkind = 'r' "
|
|
. "AND NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname) "
|
|
. "AND c.relname !~ '^(pg_|sql_)' "
|
|
. "UNION "
|
|
. "SELECT c.relname AS table_name "
|
|
. "FROM pg_class c "
|
|
. "WHERE c.relkind = 'r' "
|
|
. "AND NOT EXISTS (SELECT 1 FROM pg_views WHERE viewname = c.relname) "
|
|
. "AND NOT EXISTS (SELECT 1 FROM pg_user WHERE usesysid = c.relowner) "
|
|
. "AND c.relname !~ '^pg_'";
|
|
break;
|
|
case 'sqlite':
|
|
$sql = "SELECT name FROM sqlite_master WHERE type='table' "
|
|
. "UNION ALL SELECT name FROM sqlite_temp_master "
|
|
. "WHERE type='table' ORDER BY name";
|
|
break;
|
|
default:
|
|
throw new Exception(
|
|
'PDO type ' .
|
|
self::$_type .
|
|
' is currently not supported.',
|
|
5
|
|
);
|
|
}
|
|
self::$_db = new PDO(
|
|
$options['dsn'],
|
|
$options['usr'],
|
|
$options['pwd'],
|
|
$options['opt']
|
|
);
|
|
$statement = self::$_db->query($sql);
|
|
$tables = $statement->fetchAll(PDO::FETCH_COLUMN, 0);
|
|
|
|
// create paste table if needed
|
|
if (!array_key_exists(self::$_prefix . 'paste', $tables))
|
|
{
|
|
self::$_db->exec(
|
|
'CREATE TABLE ' . self::$_prefix . 'paste ( ' .
|
|
'dataid CHAR(16), ' .
|
|
'data TEXT, ' .
|
|
'postdate INT, ' .
|
|
'expiredate INT, ' .
|
|
'opendiscussion INT, ' .
|
|
'burnafterreading INT );'
|
|
);
|
|
}
|
|
|
|
// create comment table if needed
|
|
if (!array_key_exists(self::$_prefix . 'comment', $tables))
|
|
{
|
|
self::$_db->exec(
|
|
'CREATE TABLE ' . self::$_prefix . 'comment ( ' .
|
|
'dataid CHAR(16), ' .
|
|
'pasteid CHAR(16), ' .
|
|
'parentid CHAR(16), ' .
|
|
'data TEXT, ' .
|
|
'nickname VARCHAR(255), ' .
|
|
'vizhash TEXT, ' .
|
|
'postdate INT );'
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
return parent::$_instance;
|
|
}
|
|
|
|
/**
|
|
* Create a paste.
|
|
*
|
|
* @access public
|
|
* @param string $pasteid
|
|
* @param array $paste
|
|
* @return bool
|
|
*/
|
|
public function create($pasteid, $paste)
|
|
{
|
|
if (
|
|
array_key_exists($pasteid, self::$_cache)
|
|
) {
|
|
if(false !== self::$_cache[$pasteid]) {
|
|
return false;
|
|
} else {
|
|
unset(self::$_cache[$pasteid]);
|
|
}
|
|
}
|
|
|
|
if (
|
|
!array_key_exists('opendiscussion', $paste['meta'])
|
|
) $paste['meta']['opendiscussion'] = false;
|
|
if (
|
|
!array_key_exists('burnafterreading', $paste['meta'])
|
|
) $paste['meta']['burnafterreading'] = false;
|
|
return self::_exec(
|
|
'INSERT INTO ' . self::$_prefix . 'paste VALUES(?,?,?,?,?,?)',
|
|
array(
|
|
$pasteid,
|
|
$paste['data'],
|
|
$paste['meta']['postdate'],
|
|
$paste['meta']['expire_date'],
|
|
(int) $paste['meta']['opendiscussion'],
|
|
(int) $paste['meta']['burnafterreading'],
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Read a paste.
|
|
*
|
|
* @access public
|
|
* @param string $pasteid
|
|
* @return stdClass|false
|
|
*/
|
|
public function read($pasteid)
|
|
{
|
|
if (
|
|
!array_key_exists($pasteid, self::$_cache)
|
|
) {
|
|
self::$_cache[$pasteid] = false;
|
|
$paste = self::_select(
|
|
'SELECT * FROM ' . self::$_prefix . 'paste WHERE dataid = ?',
|
|
array($pasteid), true
|
|
);
|
|
|
|
if(false !== $paste) {
|
|
// create object
|
|
self::$_cache[$pasteid] = new stdClass;
|
|
self::$_cache[$pasteid]->data = $paste['data'];
|
|
self::$_cache[$pasteid]->meta = new stdClass;
|
|
self::$_cache[$pasteid]->meta->postdate = (int) $paste['postdate'];
|
|
self::$_cache[$pasteid]->meta->expire_date = (int) $paste['expiredate'];
|
|
if (
|
|
$paste['opendiscussion']
|
|
) self::$_cache[$pasteid]->meta->opendiscussion = true;
|
|
if (
|
|
$paste['burnafterreading']
|
|
) self::$_cache[$pasteid]->meta->burnafterreading = true;
|
|
}
|
|
}
|
|
|
|
return self::$_cache[$pasteid];
|
|
}
|
|
|
|
/**
|
|
* Delete a paste and its discussion.
|
|
*
|
|
* @access public
|
|
* @param string $pasteid
|
|
* @return void
|
|
*/
|
|
public function delete($pasteid)
|
|
{
|
|
self::_exec(
|
|
'DELETE FROM ' . self::$_prefix . 'paste WHERE dataid = ?',
|
|
array($pasteid)
|
|
);
|
|
self::_exec(
|
|
'DELETE FROM ' . self::$_prefix . 'comment WHERE pasteid = ?',
|
|
array($pasteid)
|
|
);
|
|
if (
|
|
array_key_exists($pasteid, self::$_cache)
|
|
) unset(self::$_cache[$pasteid]);
|
|
}
|
|
|
|
/**
|
|
* Test if a paste exists.
|
|
*
|
|
* @access public
|
|
* @param string $dataid
|
|
* @return void
|
|
*/
|
|
public function exists($pasteid)
|
|
{
|
|
if (
|
|
!array_key_exists($pasteid, self::$_cache)
|
|
) self::$_cache[$pasteid] = $this->read($pasteid);
|
|
return (bool) self::$_cache[$pasteid];
|
|
}
|
|
|
|
/**
|
|
* Create a comment in a paste.
|
|
*
|
|
* @access public
|
|
* @param string $pasteid
|
|
* @param string $parentid
|
|
* @param string $commentid
|
|
* @param array $comment
|
|
* @return int|false
|
|
*/
|
|
public function createComment($pasteid, $parentid, $commentid, $comment)
|
|
{
|
|
return self::_exec(
|
|
'INSERT INTO ' . self::$_prefix . 'comment VALUES(?,?,?,?,?,?,?)',
|
|
array(
|
|
$commentid,
|
|
$pasteid,
|
|
$parentid,
|
|
$comment['data'],
|
|
$comment['meta']['nickname'],
|
|
$comment['meta']['vizhash'],
|
|
$comment['meta']['postdate'],
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Read all comments of paste.
|
|
*
|
|
* @access public
|
|
* @param string $pasteid
|
|
* @return array
|
|
*/
|
|
public function readComments($pasteid)
|
|
{
|
|
$rows = self::_select(
|
|
'SELECT * FROM ' . self::$_prefix . 'comment WHERE pasteid = ?',
|
|
array($pasteid)
|
|
);
|
|
|
|
// create object
|
|
$commentTemplate = new stdClass;
|
|
$commentTemplate->meta = new stdClass;
|
|
|
|
// create comment list
|
|
$comments = array();
|
|
if (count($rows))
|
|
{
|
|
foreach ($rows as $row)
|
|
{
|
|
$i = (int) $row['postdate'];
|
|
$comments[$i] = clone $commentTemplate;
|
|
$comments[$i]->data = $row['data'];
|
|
$comments[$i]->meta->nickname = $row['nickname'];
|
|
$comments[$i]->meta->vizhash = $row['vizhash'];
|
|
$comments[$i]->meta->postdate = $i;
|
|
$comments[$i]->meta->commentid = $row['dataid'];
|
|
$comments[$i]->meta->parentid = $row['parentid'];
|
|
}
|
|
ksort($comments);
|
|
}
|
|
return $comments;
|
|
}
|
|
|
|
/**
|
|
* Test if a comment exists.
|
|
*
|
|
* @access public
|
|
* @param string $dataid
|
|
* @param string $parentid
|
|
* @param string $commentid
|
|
* @return void
|
|
*/
|
|
public function existsComment($pasteid, $parentid, $commentid)
|
|
{
|
|
return (bool) self::_select(
|
|
'SELECT dataid FROM ' . self::$_prefix . 'comment ' .
|
|
'WHERE pasteid = ? AND parentid = ? AND dataid = ?',
|
|
array($pasteid, $parentid, $commentid), true
|
|
);
|
|
}
|
|
|
|
/**
|
|
* execute a statement
|
|
*
|
|
* @access private
|
|
* @static
|
|
* @param string $sql
|
|
* @param array $params
|
|
* @throws PDOException
|
|
* @return array
|
|
*/
|
|
private static function _exec($sql, array $params)
|
|
{
|
|
$statement = self::$_db->prepare($sql);
|
|
$result = $statement->execute($params);
|
|
$statement->closeCursor();
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* run a select statement
|
|
*
|
|
* @access private
|
|
* @static
|
|
* @param string $sql
|
|
* @param array $params
|
|
* @param bool $firstOnly if only the first row should be returned
|
|
* @throws PDOException
|
|
* @return array
|
|
*/
|
|
private static function _select($sql, array $params, $firstOnly = false)
|
|
{
|
|
$statement = self::$_db->prepare($sql);
|
|
$statement->execute($params);
|
|
$result = $firstOnly ?
|
|
$statement->fetch(PDO::FETCH_ASSOC) :
|
|
$statement->fetchAll(PDO::FETCH_ASSOC);
|
|
$statement->closeCursor();
|
|
return $result;
|
|
}
|
|
}
|