initial checkin

1 files changed, 263 insertions, 0 deletions

diff --git a/include/cache.php b/include/cache.php
new file mode 100644
index 0000000..c1947ae
--- /dev/null
+++ b/include/cache.php
@@ -0,0 +1,263 @@
+<?php
+
+/**
+ * Copyright (C) 2008-2012 FluxBB
+ * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB
+ * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher
+ */
+
+// Make sure no one attempts to run this script "directly"
+if (!defined('PUN'))
+	exit;
+
+
+//
+// Generate the config cache PHP script
+//
+function generate_config_cache()
+{
+	global $db;
+
+	// Get the forum config from the DB
+	$result = $db->query('SELECT * FROM '.$db->prefix.'config', true) or error('Unable to fetch forum config', __FILE__, __LINE__, $db->error());
+
+	$output = array();
+	while ($cur_config_item = $db->fetch_row($result))
+		$output[$cur_config_item[0]] = $cur_config_item[1];
+
+	// Output config as PHP code
+	$content = '<?php'."\n\n".'define(\'PUN_CONFIG_LOADED\', 1);'."\n\n".'$pun_config = '.var_export($output, true).';'."\n\n".'?>';
+	fluxbb_write_cache_file('cache_config.php', $content);
+}
+
+
+//
+// Generate the bans cache PHP script
+//
+function generate_bans_cache()
+{
+	global $db;
+
+	// Get the ban list from the DB
+	$result = $db->query('SELECT * FROM '.$db->prefix.'bans', true) or error('Unable to fetch ban list', __FILE__, __LINE__, $db->error());
+
+	$output = array();
+	while ($cur_ban = $db->fetch_assoc($result))
+		$output[] = $cur_ban;
+
+	// Output ban list as PHP code
+	$content = '<?php'."\n\n".'define(\'PUN_BANS_LOADED\', 1);'."\n\n".'$pun_bans = '.var_export($output, true).';'."\n\n".'?>';
+	fluxbb_write_cache_file('cache_bans.php', $content);
+}
+
+
+//
+// Generate quick jump cache PHP scripts
+//
+function generate_quickjump_cache($group_id = false)
+{
+	global $db, $lang_common;
+
+	$groups = array();
+
+	// If a group_id was supplied, we generate the quick jump cache for that group only
+	if ($group_id !== false)
+	{
+		// Is this group even allowed to read forums?
+		$result = $db->query('SELECT g_read_board FROM '.$db->prefix.'groups WHERE g_id='.$group_id) or error('Unable to fetch user group read permission', __FILE__, __LINE__, $db->error());
+		$read_board = $db->result($result);
+
+		$groups[$group_id] = $read_board;
+	}
+	else
+	{
+		// A group_id was not supplied, so we generate the quick jump cache for all groups
+		$result = $db->query('SELECT g_id, g_read_board FROM '.$db->prefix.'groups') or error('Unable to fetch user group list', __FILE__, __LINE__, $db->error());
+
+		while ($row = $db->fetch_row($result))
+			$groups[$row[0]] = $row[1];
+	}
+
+	// Loop through the groups in $groups and output the cache for each of them
+	foreach ($groups as $group_id => $read_board)
+	{
+		// Output quick jump as PHP code
+		$output = '<?php'."\n\n".'if (!defined(\'PUN\')) exit;'."\n".'define(\'PUN_QJ_LOADED\', 1);'."\n".'$forum_id = isset($forum_id) ? $forum_id : 0;'."\n\n".'?>';
+
+		if ($read_board == '1')
+		{
+			$result = $db->query('SELECT c.id AS cid, c.cat_name, f.id AS fid, f.forum_name, f.redirect_url FROM '.$db->prefix.'categories AS c INNER JOIN '.$db->prefix.'forums AS f ON c.id=f.cat_id LEFT JOIN '.$db->prefix.'forum_perms AS fp ON (fp.forum_id=f.id AND fp.group_id='.$group_id.') WHERE fp.read_forum IS NULL OR fp.read_forum=1 ORDER BY c.disp_position, c.id, f.disp_position') or error('Unable to fetch category/forum list', __FILE__, __LINE__, $db->error());
+
+			if ($db->num_rows($result))
+			{
+				$output .= "\t\t\t\t".'<form id="qjump" method="get" action="viewforum.php">'."\n\t\t\t\t\t".'<div><label><span><?php echo $lang_common[\'Jump to\'] ?>'.'<br /></span>'."\n\t\t\t\t\t".'<select name="id" onchange="window.location=(\'viewforum.php?id=\'+this.options[this.selectedIndex].value)">'."\n";
+
+				$cur_category = 0;
+				while ($cur_forum = $db->fetch_assoc($result))
+				{
+					if ($cur_forum['cid'] != $cur_category) // A new category since last iteration?
+					{
+						if ($cur_category)
+							$output .= "\t\t\t\t\t\t".'</optgroup>'."\n";
+
+						$output .= "\t\t\t\t\t\t".'<optgroup label="'.pun_htmlspecialchars($cur_forum['cat_name']).'">'."\n";
+						$cur_category = $cur_forum['cid'];
+					}
+
+					$redirect_tag = ($cur_forum['redirect_url'] != '') ? ' &gt;&gt;&gt;' : '';
+					$output .= "\t\t\t\t\t\t\t".'<option value="'.$cur_forum['fid'].'"<?php echo ($forum_id == '.$cur_forum['fid'].') ? \' selected="selected"\' : \'\' ?>>'.pun_htmlspecialchars($cur_forum['forum_name']).$redirect_tag.'</option>'."\n";
+				}
+
+				$output .= "\t\t\t\t\t\t".'</optgroup>'."\n\t\t\t\t\t".'</select></label>'."\n\t\t\t\t\t".'<input type="submit" value="<?php echo $lang_common[\'Go\'] ?>" accesskey="g" />'."\n\t\t\t\t\t".'</div>'."\n\t\t\t\t".'</form>'."\n";
+			}
+		}
+
+		fluxbb_write_cache_file('cache_quickjump_'.$group_id.'.php', $output);
+	}
+}
+
+
+//
+// Generate the censoring cache PHP script
+//
+function generate_censoring_cache()
+{
+	global $db;
+
+	$result = $db->query('SELECT search_for, replace_with FROM '.$db->prefix.'censoring') or error('Unable to fetch censoring list', __FILE__, __LINE__, $db->error());
+	$num_words = $db->num_rows($result);
+
+	$search_for = $replace_with = array();
+	for ($i = 0; $i < $num_words; $i++)
+	{
+		list($search_for[$i], $replace_with[$i]) = $db->fetch_row($result);
+		$search_for[$i] = '%(?<=[^\p{L}\p{N}])('.str_replace('\*', '[\p{L}\p{N}]*?', preg_quote($search_for[$i], '%')).')(?=[^\p{L}\p{N}])%iu';
+	}
+
+	// Output censored words as PHP code
+	$content = '<?php'."\n\n".'define(\'PUN_CENSOR_LOADED\', 1);'."\n\n".'$search_for = '.var_export($search_for, true).';'."\n\n".'$replace_with = '.var_export($replace_with, true).';'."\n\n".'?>';
+	fluxbb_write_cache_file('cache_censoring.php', $content);
+}
+
+
+//
+// Generate the stopwords cache PHP script
+//
+function generate_stopwords_cache()
+{
+	$stopwords = array();
+
+	$d = dir(PUN_ROOT.'lang');
+	while (($entry = $d->read()) !== false)
+	{
+		if ($entry{0} == '.')
+			continue;
+
+		if (is_dir(PUN_ROOT.'lang/'.$entry) && file_exists(PUN_ROOT.'lang/'.$entry.'/stopwords.txt'))
+			$stopwords = array_merge($stopwords, file(PUN_ROOT.'lang/'.$entry.'/stopwords.txt'));
+	}
+	$d->close();
+
+	// Tidy up and filter the stopwords
+	$stopwords = array_map('pun_trim', $stopwords);
+	$stopwords = array_filter($stopwords);
+
+	// Output stopwords as PHP code
+	$content = '<?php'."\n\n".'$cache_id = \''.generate_stopwords_cache_id().'\';'."\n".'if ($cache_id != generate_stopwords_cache_id()) return;'."\n\n".'define(\'PUN_STOPWORDS_LOADED\', 1);'."\n\n".'$stopwords = '.var_export($stopwords, true).';'."\n\n".'?>';
+	fluxbb_write_cache_file('cache_stopwords.php', $content);
+}
+
+
+//
+// Load some information about the latest registered users
+//
+function generate_users_info_cache()
+{
+	global $db;
+
+	$stats = array();
+
+	$result = $db->query('SELECT COUNT(id)-1 FROM '.$db->prefix.'users WHERE group_id!='.PUN_UNVERIFIED) or error('Unable to fetch total user count', __FILE__, __LINE__, $db->error());
+	$stats['total_users'] = $db->result($result);
+
+	$result = $db->query('SELECT id, username FROM '.$db->prefix.'users WHERE group_id!='.PUN_UNVERIFIED.' ORDER BY registered DESC LIMIT 1') or error('Unable to fetch newest registered user', __FILE__, __LINE__, $db->error());
+	$stats['last_user'] = $db->fetch_assoc($result);
+
+	// Output users info as PHP code
+	$content = '<?php'."\n\n".'define(\'PUN_USERS_INFO_LOADED\', 1);'."\n\n".'$stats = '.var_export($stats, true).';'."\n\n".'?>';
+	fluxbb_write_cache_file('cache_users_info.php', $content);
+}
+
+
+//
+// Generate the admins cache PHP script
+//
+function generate_admins_cache()
+{
+	global $db;
+
+	// Get admins from the DB
+	$result = $db->query('SELECT id FROM '.$db->prefix.'users WHERE group_id='.PUN_ADMIN) or error('Unable to fetch users info', __FILE__, __LINE__, $db->error());
+
+	$output = array();
+	while ($row = $db->fetch_row($result))
+		$output[] = $row[0];
+
+	// Output admin list as PHP code
+	$content = '<?php'."\n\n".'define(\'PUN_ADMINS_LOADED\', 1);'."\n\n".'$pun_admins = '.var_export($output, true).';'."\n\n".'?>';
+	fluxbb_write_cache_file('cache_admins.php', $content);
+}
+
+
+//
+// Safely write out a cache file.
+//
+function fluxbb_write_cache_file($file, $content)
+{
+	$fh = @fopen(FORUM_CACHE_DIR.$file, 'wb');
+	if (!$fh)
+		error('Unable to write cache file '.pun_htmlspecialchars($file).' to cache directory. Please make sure PHP has write access to the directory \''.pun_htmlspecialchars(FORUM_CACHE_DIR).'\'', __FILE__, __LINE__);
+
+	flock($fh, LOCK_EX);
+	ftruncate($fh, 0);
+
+	fwrite($fh, $content);
+
+	flock($fh, LOCK_UN);
+	fclose($fh);
+
+	fluxbb_invalidate_cached_file(FORUM_CACHE_DIR.$file);
+}
+
+
+//
+// Delete all feed caches
+//
+function clear_feed_cache()
+{
+	$d = dir(FORUM_CACHE_DIR);
+	while (($entry = $d->read()) !== false)
+	{
+		if (substr($entry, 0, 10) == 'cache_feed' && substr($entry, -4) == '.php')
+		{
+			@unlink(FORUM_CACHE_DIR.$entry);
+			fluxbb_invalidate_cached_file(FORUM_CACHE_DIR.$entry);
+		}
+	}
+	$d->close();
+}
+
+
+//
+// Invalidate updated php files that are cached by an opcache
+//
+function fluxbb_invalidate_cached_file($file)
+{
+	if (function_exists('opcache_invalidate'))
+		opcache_invalidate($file, true);
+	elseif (function_exists('apc_delete_file'))
+		@apc_delete_file($file);
+}
+
+
+define('FORUM_CACHE_FUNCTIONS_LOADED', true);