Disable output gzipping during file download... it negates the memory usage controls
<?php
/*
* Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
* Copyright (C) 2006-2009 Dan Fuhry
*
* This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
*/
/**
* Class that handles comments. Has HTML/Javascript frontend support.
* @package Enano CMS
* @subpackage Comment manager
* @license GNU General Public License <http://www.gnu.org/licenses/gpl-2.0.html>
*/
class Comments
{
#
# VARIABLES
#
/**
* Current list of comments.
* @var array
*/
var $comments = Array();
/**
* Object to track permissions.
* @var object
*/
var $perms;
#
# METHODS
#
/**
* Constructor.
* @param string Page ID of the page to load comments for
* @param string Namespace of the page to load comments for
*/
function __construct($page_id, $namespace)
{
global $db, $session, $paths, $template, $plugins; // Common objects
// Initialize permissions
if ( $page_id == $paths->page_id && $namespace == $paths->namespace )
$this->perms =& $GLOBALS['session'];
else
$this->perms = $session->fetch_page_acl($page_id, $namespace);
$this->page_id = $db->escape($page_id);
$this->namespace = $db->escape($namespace);
}
/**
* Processes a command in JSON format.
* @param mixed Either the JSON-encoded input string, probably something sent from the Javascript/AJAX frontend, or an equivalent array
*/
function process_json($json)
{
global $db, $session, $paths, $template, $plugins; // Common objects
global $lang;
$is_json = !is_array($json);
if ( $is_json )
{
$data = enano_json_decode($json);
$data = decode_unicode_array($data);
}
else
{
$data =& $json;
}
if ( !isset($data['mode']) )
{
$ret = Array('mode'=>'error','error'=>'No mode defined!');
echo enano_json_encode($ret);
return $ret;
}
if ( getConfig('enable_comments', '1') == '0' )
{
$ret = Array('mode'=>'error','error'=>'Comments are not enabled on this site.');
echo enano_json_encode($ret);
return $ret;
}
$ret = Array();
$ret['mode'] = $data['mode'];
if ( isset($data['passback']) )
$ret['passback'] = $data['passback'];
switch ( $data['mode'] )
{
case 'fetch':
if ( !$template->theme_loaded )
$template->load_theme();
if ( !isset($data['have_template']) )
{
$ret['template'] = file_get_contents(ENANO_ROOT . '/themes/' . $template->theme . '/comment.tpl');
}
$approve_clause = $this->perms->get_permissions('mod_comments') ? '' : " AND approved = " . COMMENT_APPROVED;
// Get totals
$q = $db->sql_query('SELECT approved FROM ' . table_prefix . "comments WHERE page_id = '$this->page_id' AND namespace = '$this->namespace'{$approve_clause};");
if ( !$q )
$db->die_json();
$counts = array('total' => 0, 'approved' => 0, 'unapproved' => 0, 'spam' => 0);
while ( $row = $db->fetchrow() )
{
$counts['total']++;
switch($row['approved']):
case COMMENT_APPROVED: $counts['approved']++; break;
case COMMENT_UNAPPROVED: $counts['unapproved']++; break;
case COMMENT_SPAM: $counts['spam']++; break;
endswitch;
}
$counts['unapproved'] = $counts['total'] - $counts['approved'];
$data['counts'] = $counts;
// FIXME, this should be a user preference eventually
$ret['per_page'] = $per_page = getConfig('comments_per_page', 10);
$page = ( !empty($data['pagenum']) ) ? intval($data['pagenum']) : 0;
if ( $page > 0 )
{
$ret['mode'] = 'refetch';
}
$limit_clause = "LIMIT $per_page OFFSET " . ($page * $per_page);
$q = $db->sql_query('SELECT c.comment_id,c.name,c.subject,c.comment_data,c.time,c.approved,( c.ip_address IS NOT NULL ) AS have_ip,u.username,u.user_level,u.user_id,u.email,u.signature,u.user_has_avatar,u.avatar_type, b.buddy_id IS NOT NULL AS is_buddy, ( b.is_friend IS NOT NULL AND b.is_friend=1 ) AS is_friend FROM '.table_prefix.'comments AS c
LEFT JOIN '.table_prefix.'users AS u
ON (u.user_id=c.user_id)
LEFT JOIN '.table_prefix.'buddies AS b
ON ( ( b.user_id=' . $session->user_id.' AND b.buddy_user_id=c.user_id ) OR b.user_id IS NULL)
LEFT JOIN '.table_prefix.'ranks AS r
ON ( ( u.user_rank = r.rank_id ) )
WHERE page_id=\'' . $this->page_id . '\'
AND namespace=\'' . $this->namespace . '\'
' . $approve_clause . '
GROUP BY c.comment_id,c.name,c.subject,c.comment_data,c.time,c.approved,c.ip_address,u.username,u.user_level,u.user_id,u.email,u.signature,u.user_has_avatar,u.avatar_type,b.buddy_id,b.is_friend
ORDER BY c.time ASC
' . $limit_clause . ';');
$ret['comments'] = Array();
if (!$q)
$db->die_json();
if ( $row = $db->fetchrow($q) )
{
do {
if ( !$this->perms->get_permissions('mod_comments') && $row['approved'] != COMMENT_APPROVED )
continue;
// Localize the rank
$row = array_merge($row, $session->get_user_rank(intval($row['user_id'])));
// Send the source
$row['comment_source'] = $row['comment_data'];
// Format text
$row['comment_data'] = RenderMan::render($row['comment_data']);
// Hide it if it's a post from a foe
// 1.1.8: moved to within the comment templates
/*
if ( $row['is_buddy'] == 1 && $row['is_friend'] == 0 )
{
$seed = md5(sha1(mt_rand() . microtime()));
$wrapper = '
<div id="posthide_'.$seed.'" style="display: none;">
' . $row['comment_data'] . '
</div>
<p><span style="opacity: 0.4; filter: alpha(opacity=40);">' . $lang->get('comment_msg_foe_comment_hidden') . '</span> <span style="text-align: right;"><a href="#showpost" onclick="document.getElementById(\'posthide_'.$seed.'\').style.display=\'block\'; this.parentNode.parentNode.parentNode.removeChild(this.parentNode.parentNode); return false;">' . $lang->get('comment_btn_display_foe_comment') . '</a></span></p>
';
$row['comment_data'] = $wrapper;
}
*/
// Format date
$row['time'] = enano_date(ED_DATE | ED_TIME, $row['time']);
// Format signature
$row['signature'] = ( !empty($row['signature']) ) ? RenderMan::render($row['signature']) : '';
// Do we have the IP?
$row['have_ip'] = ( $row['have_ip'] == 1 );
// Avatar URL
$row['avatar_path'] = make_avatar_url($row['user_id'], $row['avatar_type'], $row['email']);
// Name
//if ( $row['user_id'] > 1 )
// $row['name'] = $row['username'];
// Add the comment to the list
$ret['comments'][] = $row;
} while ( $row = $db->fetchrow($q) );
}
$db->free_result();
$ret['count_appr'] = $counts['approved'];
$ret['count_total'] = $counts['total'];
$ret['count_visible'] = $this->perms->get_permissions('mod_comments') ? $counts['total'] : $counts['approved'];
$ret['count_unappr'] = $counts['unapproved'];
$ret['auth_mod_comments'] = $this->perms->get_permissions('mod_comments');
$ret['auth_post_comments'] = $this->perms->get_permissions('post_comments');
$ret['auth_edit_comments'] = $this->perms->get_permissions('edit_comments');
$ret['auth_edit_wysiwyg'] = $this->perms->get_permissions('edit_wysiwyg');
$ret['user_id'] = $session->user_id;
$ret['username'] = $session->username;
$ret['logged_in'] = $session->user_logged_in;
$ret['user_level'] = Array();
$ret['user_level']['guest'] = USER_LEVEL_GUEST;
$ret['user_level']['member'] = USER_LEVEL_MEMBER;
$ret['user_level']['mod'] = USER_LEVEL_MOD;
$ret['user_level']['admin'] = USER_LEVEL_ADMIN;
$ret['approval_needed'] = ( getConfig('approve_comments', '0') == '1' );
$ret['guest_posting'] = getConfig('comments_need_login');
if ( $ret['guest_posting'] == '1' && !$session->user_logged_in )
{
$session->kill_captcha();
$ret['captcha'] = $session->make_captcha();
}
break;
case 'edit':
$cid = (string)$data['id'];
if ( !ctype_digit($cid) || intval($cid) < 1 )
{
echo '{"mode":"error","error":"HACKING ATTEMPT"}';
return false;
}
$cid = intval($cid);
$q = $db->sql_query('SELECT c.user_id,c.approved FROM '.table_prefix.'comments c LEFT JOIN '.table_prefix.'users u ON (u.user_id=c.user_id) WHERE comment_id='.$cid.';');
if(!$q)
$db->die_json();
$row = $db->fetchrow();
$uid = intval($row['user_id']);
$can_edit = ( ( $uid == $session->user_id && $uid != 1 && $this->perms->get_permissions('edit_comments') ) || ( $this->perms->get_permissions('mod_comments') ) );
if(!$can_edit)
{
echo '{"mode":"error","error":"HACKING ATTEMPT"}';
return false;
}
$data['data'] = str_replace("\r", '', $data['data']); // Windows compatibility
$text = RenderMan::preprocess_text($data['data'], true, false);
$text2 = $db->escape($text);
$subj = $db->escape(htmlspecialchars($data['subj']));
$q = $db->sql_query('UPDATE '.table_prefix.'comments SET subject=\'' . $subj . '\',comment_data=\'' . $text2 . '\' WHERE comment_id=' . $cid . ';');
if(!$q)
$db->die_json();
$ret = Array(
'mode' => 'redraw',
'id' => $data['local_id'],
'subj' => htmlspecialchars($data['subj']),
'text' => RenderMan::render($text),
'src' => $text,
'approved' => $row['approved']
);
break;
case 'delete':
$cid = (string)$data['id'];
if ( !ctype_digit($cid) || intval($cid) < 1 )
{
echo '{"mode":"error","error":"HACKING ATTEMPT"}';
return false;
}
$cid = intval($cid);
$q = $db->sql_query('SELECT c.user_id FROM '.table_prefix.'comments c LEFT JOIN '.table_prefix.'users u ON (u.user_id=c.user_id) WHERE comment_id='.$cid.';');
if(!$q)
$db->die_json();
$row = $db->fetchrow();
$uid = intval($row['user_id']);
$can_edit = ( ( $uid == $session->user_id && $uid != 1 && $this->perms->get_permissions('edit_comments') ) || ( $this->perms->get_permissions('mod_comments') ) );
if(!$can_edit)
{
echo '{"mode":"error","error":"HACKING ATTEMPT"}';
return false;
}
$q = $db->sql_query('DELETE FROM '.table_prefix.'comments WHERE comment_id='.$cid.';');
if(!$q)
$db->die_json();
$ret = Array(
'mode' => 'annihilate',
'id' => $data['local_id']
);
break;
case 'submit':
// Now for a huge round of security checks...
$errors = Array();
// Authorization
// Like the rest of the ACL system, this call is a one-stop check for ALL ACL entries.
if ( !$this->perms->get_permissions('post_comments') )
$errors[] = 'The site security policy prevents your user account from posting comments;';
// Guest authorization
if ( getConfig('comments_need_login') == '2' && !$session->user_logged_in )
$errors[] = $lang->get('comment_err_need_login');
// CAPTCHA code
if ( getConfig('comments_need_login') == '1' && !$session->user_logged_in )
{
$real_code = $session->get_captcha($data['captcha_id']);
if ( strtolower($real_code) !== strtolower($data['captcha_code']) )
$errors[] = $lang->get('comment_err_captcha_wrong');
$session->kill_captcha();
}
// Spam check
$spam_policy = getConfig('comment_spam_policy', 'moderate');
$sc_name = ( $session->user_logged_in ) ? $session->username : $data['name'];
$sc_mail = ( $session->user_logged_in ) ? $session->email : false;
$sc_url = ( $session->user_logged_in ) ? @$session->user_extra['user_homepage'] : false;
$spamcheck = $spam_policy === 'accept' ? true : spamalyze($data['text'], $sc_name, $sc_mail, $sc_url);
if ( !$spamcheck && $spam_policy === 'reject' )
{
$errors[] = $lang->get('comment_err_spamcheck_failed_rejected');
}
if ( count($errors) > 0 )
{
$ret = Array(
'mode' => 'error',
'error' => implode("\n", $errors)
);
}
else
{
// We're authorized!
// Preprocess
$name = ( $session->user_logged_in ) ? htmlspecialchars($session->username) : htmlspecialchars($data['name']);
$subj = htmlspecialchars($data['subj']);
$text = RenderMan::preprocess_text($data['text'], true, false);
$src = $text;
$sql_subj = $db->escape($subj);
$sql_text = $db->escape($text);
$text = RenderMan::render($text);
$appr = ( getConfig('approve_comments', '0') == '1' ) ? COMMENT_UNAPPROVED : COMMENT_APPROVED;
if ( $spam_policy === 'moderate' && !$spamcheck )
$appr = COMMENT_SPAM;
$time = time();
$date = enano_date(ED_DATE | ED_TIME, $time);
$ip = $_SERVER['REMOTE_ADDR'];
if ( !is_valid_ip($ip) )
die('Hacking attempt');
// Send it to the database
$q = $db->sql_query('INSERT INTO '.table_prefix.'comments(page_id,namespace,name,subject,comment_data,approved, time, user_id, ip_address) VALUES' . "\n " .
"('$this->page_id', '$this->namespace', '$name', '$sql_subj', '$sql_text', $appr, $time, {$session->user_id}, '$ip');");
if(!$q)
$db->die_json();
// Re-fetch
$q = $db->sql_query('SELECT c.comment_id,c.name,c.subject,c.comment_data,c.time,c.approved,u.user_level,u.user_id,u.email,u.signature,u.user_has_avatar,u.avatar_type FROM '.table_prefix.'comments AS c
LEFT JOIN '.table_prefix.'users AS u
ON (u.user_id=c.user_id)
WHERE page_id=\'' . $this->page_id . '\'
AND namespace=\'' . $this->namespace . '\'
AND time='.$time.' ORDER BY comment_id DESC LIMIT 1;');
if(!$q)
$db->die_json();
$row = $db->fetchrow();
$db->free_result();
$row['time'] = $date;
$row['comment_data'] = $text;
$row['comment_source'] = $src;
$ret = Array(
'mode' => 'materialize'
);
$ret = enano_safe_array_merge($ret, $row);
$ret['auth_mod_comments'] = $this->perms->get_permissions('mod_comments');
$ret['auth_post_comments'] = $this->perms->get_permissions('post_comments');
$ret['auth_edit_comments'] = $this->perms->get_permissions('edit_comments');
$ret['user_id'] = $session->user_id;
$ret['rank_data'] = $session->get_user_rank($session->user_id);
$ret['username'] = $session->username;
$ret['logged_in'] = $session->user_logged_in;
$ret['signature'] = RenderMan::render($row['signature']);
$ret['user_level_list'] = Array();
$ret['user_level_list']['guest'] = USER_LEVEL_GUEST;
$ret['user_level_list']['member'] = USER_LEVEL_MEMBER;
$ret['user_level_list']['mod'] = USER_LEVEL_MOD;
$ret['user_level_list']['admin'] = USER_LEVEL_ADMIN;
$ret['avatar_path'] = make_avatar_url($row['user_id'], $row['avatar_type'], $row['email']);
}
break;
case 'approve':
if ( !$this->perms->get_permissions('mod_comments') )
{
$ret = Array(
'mode' => 'error',
'error' => 'You are not authorized to moderate comments.'
);
echo enano_json_encode($ret);
return $ret;
}
$cid = (string)$data['id'];
if ( !ctype_digit($cid) || intval($cid) < 1 )
{
echo '{"mode":"error","error":"HACKING ATTEMPT"}';
return false;
}
$cid = intval($cid);
$q = $db->sql_query('SELECT subject,approved FROM '.table_prefix.'comments WHERE comment_id='.$cid.';');
if(!$q || $db->numrows() < 1)
$db->die_json();
$row = $db->fetchrow();
$db->free_result();
$appr = ( $row['approved'] == '1' ) ? '0' : '1';
$q = $db->sql_query('UPDATE '.table_prefix."comments SET approved=$appr WHERE comment_id=$cid;");
if (!$q)
$db->die_json();
$ret = Array(
'mode' => 'redraw',
'approved' => $appr,
'subj' => $row['subject'],
'id' => $data['local_id'],
'approve_updated' => 'yes'
);
break;
case 'view_ip':
if ( !$session->get_permissions('mod_comments') )
{
return array(
'mode' => 'error',
'error' => 'Unauthorized'
);
}
// fetch comment info
if ( !is_int($data['id']) )
{
return array(
'mode' => 'error',
'error' => 'Unauthorized'
);
}
$id =& $data['id'];
$q = $db->sql_query('SELECT ip_address, name FROM ' . table_prefix . 'comments WHERE comment_id = ' . $id . ';');
if ( !$q || $db->numrows() < 1 )
{
$db->die_json();
}
list($ip_addr, $name) = $db->fetchrow_num($q);
$db->free_result();
$name = $db->escape($name);
$username = $db->escape($session->username);
// log this action
$q = $db->sql_query('INSERT INTO ' . table_prefix . "logs(time_id, log_type, action, page_text, author, author_uid, edit_summary) VALUES\n "
. "( " . time() . ", 'security', 'view_comment_ip', '$name', '$username', $session->user_id, '{$_SERVER['REMOTE_ADDR']}' );");
if ( !$q )
$db->die_json();
// send packet
$ret = array(
'mode' => 'redraw',
'ip_addr' => $ip_addr,
'local_id' => $data['local_id']
);
break;
default:
$ret = Array(
'mode' => 'error',
'error' => $data['mode'] . ' is not a valid request mode'
);
break;
}
if ( $is_json )
echo enano_json_encode($ret);
return $ret;
}
} // class Comments