phpbb3源码分析-/includes/functions_module.php（v0.01） - 拳不离手、曲不离口 - Speak with your code, my friend, not your word.
phpbb3源码分析-/includes/functions_module.php（v0.01）
<?php
/**
*
* @package phpBB3
* @version $Id: functions_module.php 9095 2008-11-23 12:42:34Z acydburn $
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* Class handling all types of 'plugins' (a future term)
* @package phpBB3
*/
class p_master //有趣，类名应该是plugin master的意思，说明这个类是个master，把plugin或者说模块当slave看。
{
var $p_id;
var $p_class;
var $p_name;
var $p_mode;
var $p_parent;
var $include_path = false;
var $active_module = false;
var $active_module_row_id = false;
var $acl_forum_id = false;
var $module_ary = array();
/**
* Constuctor
* Set module include path
*/
function p_master($include_path = false)
{
global $phpbb_root_path;
$this->include_path = ($include_path !== false) ? $include_path : $phpbb_root_path . 'includes/';
// Make sure the path ends with /
if (substr($this->include_path, -1) !== '/')
{
$this->include_path .= '/';
}
}
/**
* Set custom include path for modules
* Schema for inclusion is include_path . modulebase
*
* @param string $include_path include path to be used.
* @access public
*/
function set_custom_include_path($include_path)
{
$this->include_path = $include_path;
// Make sure the path ends with /
if (substr($this->include_path, -1) !== '/')
{
$this->include_path .= '/';
}
}
/**
* List modules
*
* This creates a list, stored in $this->module_ary of all available
* modules for the given class (ucp, mcp and acp). Additionally
* $this->module_y_ary is created with indentation information for
* displaying the module list appropriately. Only modules for which
* the user has access rights are included in these lists.
*/
function list_modules($p_class)
{
global $auth, $db, $user, $cache;
global $config, $phpbb_root_path, $phpEx;
// Sanitise for future path use, it's escaped as appropriate for queries
$this->p_class = str_replace(array('.', '/', '\\'), '', basename($p_class));
// Get cached modules
if (($this->module_cache = $cache->get('_modules_' . $this->p_class)) === false)
{
// Get modules
$sql = 'SELECT *
FROM ' . MODULES_TABLE . "
WHERE module_class = '" . $db->sql_escape($this->p_class) . "'
ORDER BY left_id ASC";
$result = $db->sql_query($sql);
$rows = array();
while ($row = $db->sql_fetchrow($result))
{
$rows[$row['module_id']] = $row;
}
$db->sql_freeresult($result);
$this->module_cache = array();
foreach ($rows as $module_id => $row)
{
$this->module_cache['modules'][] = $row;
$this->module_cache['parents'][$row['module_id']] = $this->get_parents($row['parent_id'], $row['left_id'], $row['right_id'], $rows);
}
unset($rows);
$cache->put('_modules_' . $this->p_class, $this->module_cache);
}
if (empty($this->module_cache))
{
$this->module_cache = array('modules' => array(), 'parents' => array());
}
// We "could" build a true tree with this function - maybe mod authors want to use this...
// Functions for traversing and manipulating the tree are not available though
// We might re-structure the module system to use true trees in 3.2.x...
// $tree = $this->build_tree($this->module_cache['modules'], $this->module_cache['parents']);
// Clean up module cache array to only let survive modules the user can access
$right_id = false;
foreach ($this->module_cache['modules'] as $key => $row)
{
// Not allowed to view module?
if (!$this->module_auth($row['module_auth']))
{
unset($this->module_cache['modules'][$key]);
continue;
}
// Category with no members, ignore
if (!$row['module_basename'] && ($row['left_id'] + 1 == $row['right_id']))
{
unset($this->module_cache['modules'][$key]);
continue;
}
// Skip branch
if ($right_id !== false)
{
if ($row['left_id'] < $right_id)
{
unset($this->module_cache['modules'][$key]);
continue;
}
$right_id = false;
}
// Not enabled?
if (!$row['module_enabled'])
{
// If category is disabled then disable every child too
unset($this->module_cache['modules'][$key]);
$right_id = $row['right_id'];
continue;
}
}
// Re-index (this is needed, else we are not able to array_slice later)
$this->module_cache['modules'] = array_merge($this->module_cache['modules']);
// Include MOD _info files for populating language entries within the menus
$this->add_mod_info($this->p_class);
// Now build the module array, but exclude completely empty categories...
$right_id = false;
$names = array();
foreach ($this->module_cache['modules'] as $key => $row)
{
// Skip branch
if ($right_id !== false)
{
if ($row['left_id'] < $right_id)
{
continue;
}
$right_id = false;
}
// Category with no members on their way down (we have to check every level)
if (!$row['module_basename'])
{
$empty_category = true;
// We go through the branch and look for an activated module
foreach (array_slice($this->module_cache['modules'], $key + 1) as $temp_row)
{
if ($temp_row['left_id'] > $row['left_id'] && $temp_row['left_id'] < $row['right_id'])
{
// Module there
if ($temp_row['module_basename'] && $temp_row['module_enabled'])
{
$empty_category = false;
break;
}
continue;
}
break;
}
// Skip the branch
if ($empty_category)
{
$right_id = $row['right_id'];
continue;
}
}
$depth = sizeof($this->module_cache['parents'][$row['module_id']]);
// We need to prefix the functions to not create a naming conflict
// Function for building 'url_extra'
$url_func = '_module_' . $row['module_basename'] . '_url';
// Function for building the language name
$lang_func = '_module_' . $row['module_basename'] . '_lang';
// Custom function for calling parameters on module init (for example assigning template variables)
$custom_func = '_module_' . $row['module_basename'];
$names[$row['module_basename'] . '_' . $row['module_mode']][] = true;
$module_row = array(
'depth' => $depth,
'id' => (int) $row['module_id'],
'parent' => (int) $row['parent_id'],
'cat' => ($row['right_id'] > $row['left_id'] + 1) ? true : false,
'is_duplicate' => ($row['module_basename'] && sizeof($names[$row['module_basename'] . '_' . $row['module_mode']]) > 1) ? true : false,
'name' => (string) $row['module_basename'],
'mode' => (string) $row['module_mode'],
'display' => (int) $row['module_display'],
'url_extra' => (function_exists($url_func)) ? $url_func($row['module_mode'], $row) : '',
'lang' => ($row['module_basename'] && function_exists($lang_func)) ? $lang_func($row['module_mode'], $row['module_langname']) : ((!empty($user->lang[$row['module_langname']])) ? $user->lang[$row['module_langname']] : $row['module_langname']),
'langname' => $row['module_langname'],
'left' => $row['left_id'],
'right' => $row['right_id'],
);
if (function_exists($custom_func))
{
$custom_func($row['module_mode'], $module_row);
}
$this->module_ary[] = $module_row;
}
unset($this->module_cache['modules'], $names);
}
/**
* Check if a certain main module is accessible/loaded
* By giving the module mode you are able to additionally check for only one mode within the main module
*
* @param string $module_basename The module base name, for example logs, reports, main (for the mcp).
* @param mixed $module_mode The module mode to check. If provided the mode will be checked in addition for presence.
*
* @return bool Returns true if module is loaded and accessible, else returns false
*/
function loaded($module_basename, $module_mode = false)
{
if (empty($this->loaded_cache))
{
$this->loaded_cache = array();
foreach ($this->module_ary as $row)
{
if (!$row['name'])
{
continue;
}
if (!isset($this->loaded_cache[$row['name']]))
{
$this->loaded_cache[$row['name']] = array();
}
if (!$row['mode'])
{
continue;
}
$this->loaded_cache[$row['name']][$row['mode']] = true;
}
}
if ($module_mode === false)
{
return (isset($this->loaded_cache[$module_basename])) ? true : false;
}
return (!empty($this->loaded_cache[$module_basename][$module_mode])) ? true : false;
}
/**
* Check module authorisation
*/
function module_auth($module_auth, $forum_id = false)
{
global $auth, $config;
$module_auth = trim($module_auth);
// Generally allowed to access module if module_auth is empty
if (!$module_auth)
{
return true;
}
// With the code below we make sure only those elements get eval'd we really want to be checked
preg_match_all('/(?:
"[^"\\\\]*(?:\\\\.[^"\\\\]*)*" |
\'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*\' |
[(),] |
[^\s(),]+)/x', $module_auth, $match);
$tokens = $match[0];
for ($i = 0, $size = sizeof($tokens); $i < $size; $i++)
{
$token = &$tokens[$i];
switch ($token)
{
case ')':
case '(':
case '&&':
case '||':
case ',':
break;
default:
if (!preg_match('#(?:acl_([a-z0-9_]+)(,\$id)?)|(?:\$id)|(?:aclf_([a-z0-9_]+))|(?:cfg_([a-z0-9_]+))|(?:request_([a-zA-Z0-9_]+))#', $token))
{
$token = '';
}
break;
}
}
$module_auth = implode(' ', $tokens);
// Make sure $id seperation is working fine
$module_auth = str_replace(' , ', ',', $module_auth);
$forum_id = ($forum_id === false) ? $this->acl_forum_id : $forum_id;
$is_auth = false;
eval('$is_auth = (int) (' . preg_replace(array('#acl_([a-z0-9_]+)(,\$id)?#', '#\$id#', '#aclf_([a-z0-9_]+)#', '#cfg_([a-z0-9_]+)#', '#request_([a-zA-Z0-9_]+)#'), array('(int) $auth->acl_get(\'\\1\'\\2)', '(int) $forum_id', '(int) $auth->acl_getf_global(\'\\1\')', '(int) $config[\'\\1\']', '!empty($_REQUEST[\'\\1\'])'), $module_auth) . ');');
return $is_auth;
}
/**
* Set active module
*/
function set_active($id = false, $mode = false)
{
$icat = false;
$this->active_module = false;
if (request_var('icat', ''))
{
$icat = $id;
$id = request_var('icat', '');
}
$category = false;
foreach ($this->module_ary as $row_id => $item_ary)
{
// If this is a module and it's selected, active
// If this is a category and the module is the first within it, active
// If this is a module and no mode selected, select first mode
// If no category or module selected, go active for first module in first category
if (
(($item_ary['name'] === $id || $item_ary['id'] === (int) $id) && (($item_ary['mode'] == $mode && !$item_ary['cat']) || ($icat && $item_ary['cat']))) ||
($item_ary['parent'] === $category && !$item_ary['cat'] && !$icat && $item_ary['display']) ||
(($item_ary['name'] === $id || $item_ary['id'] === (int) $id) && !$mode && !$item_ary['cat']) ||
(!$id && !$mode && !$item_ary['cat'] && $item_ary['display'])
)
{
if ($item_ary['cat'])
{
$id = $icat;
$icat = false;
continue;
}
$this->p_id = $item_ary['id'];
$this->p_parent = $item_ary['parent'];
$this->p_name = $item_ary['name'];
$this->p_mode = $item_ary['mode'];
$this->p_left = $item_ary['left'];
$this->p_right = $item_ary['right'];
$this->module_cache['parents'] = $this->module_cache['parents'][$this->p_id];
$this->active_module = $item_ary['id'];
$this->active_module_row_id = $row_id;
break;
}
else if (($item_ary['cat'] && $item_ary['id'] === (int) $id) || ($item_ary['parent'] === $category && $item_ary['cat']))
{
$category = $item_ary['id'];
}
}
}
/**
* Loads currently active module
*
* This method loads a given module, passing it the relevant id and mode.
*/
function load_active($mode = false, $module_url = false, $execute_module = true)
{
global $phpbb_root_path, $phpbb_admin_path, $phpEx, $user;
$module_path = $this->include_path . $this->p_class;
$icat = request_var('icat', '');
if ($this->active_module === false)
{
trigger_error('Module not accessible', E_USER_ERROR);
}
if (!class_exists("{$this->p_class}_$this->p_name"))
{
if (!file_exists("$module_path/{$this->p_class}_$this->p_name.$phpEx"))
{
trigger_error("Cannot find module $module_path/{$this->p_class}_$this->p_name.$phpEx", E_USER_ERROR);
}
include("$module_path/{$this->p_class}_$this->p_name.$phpEx");
if (!class_exists("{$this->p_class}_$this->p_name"))
{
trigger_error("Module file $module_path/{$this->p_class}_$this->p_name.$phpEx does not contain correct class [{$this->p_class}_$this->p_name]", E_USER_ERROR);
}
if (!empty($mode))
{
$this->p_mode = $mode;
}
// Create a new instance of the desired module ... if it has a
// constructor it will of course be executed
$instance = "{$this->p_class}_$this->p_name";
$this->module = new $instance($this);
// We pre-define the action parameter we are using all over the place
if (defined('IN_ADMIN'))
{
// Is first module automatically enabled a duplicate and the category not passed yet?
if (!$icat && $this->module_ary[$this->active_module_row_id]['is_duplicate'])
{
$icat = $this->module_ary[$this->active_module_row_id]['parent'];
}
// Not being able to overwrite ;)
$this->module->u_action = append_sid("{$phpbb_admin_path}index.$phpEx", "i={$this->p_name}") . (($icat) ? '&icat=' . $icat : '') . "&mode={$this->p_mode}";
}
else
{
// If user specified the module url we will use it...
if ($module_url !== false)
{
$this->module->u_action = $module_url;
}
else
{
$this->module->u_action = $phpbb_root_path . (($user->page['page_dir']) ? $user->page['page_dir'] . '/' : '') . $user->page['page_name'];
}
$this->module->u_action = append_sid($this->module->u_action, "i={$this->p_name}") . (($icat) ? '&icat=' . $icat : '') . "&mode={$this->p_mode}";
}
// Add url_extra parameter to u_action url
if (!empty($this->module_ary) && $this->active_module !== false && $this->module_ary[$this->active_module_row_id]['url_extra'])
{
$this->module->u_action .= $this->module_ary[$this->active_module_row_id]['url_extra'];
}
// Assign the module path for re-usage
$this->module->module_path = $module_path . '/';
// Execute the main method for the new instance, we send the module id and mode as parameters
// Users are able to call the main method after this function to be able to assign additional parameters manually
if ($execute_module)
{
$this->module->main($this->p_name, $this->p_mode);
}
return;
}
}
/**
* Appending url parameter to the currently active module.
*
* This function is called for adding specific url parameters while executing the current module.
* It is doing the same as the _module_{name}_url() function, apart from being able to be called after
* having dynamically parsed specific parameters. This allows more freedom in choosing additional parameters.
* One example can be seen in /includes/mcp/mcp_notes.php - $this->p_master->adjust_url() call.
*
* @param string $url_extra Extra url parameters, e.g.: &u=$user_id
*
*/
function adjust_url($url_extra)
{
if (empty($this->module_ary[$this->active_module_row_id]))
{
return;
}
$row = &$this->module_ary[$this->active_module_row_id];
// We check for the same url_extra in $row['url_extra'] to overcome doubled additions...
if (strpos($row['url_extra'], $url_extra) === false)
{
$row['url_extra'] .= $url_extra;
}
}
/**
* Check if a module is active
*/
function is_active($id, $mode = false)
{
// If we find a name by this id and being enabled we have our active one...
foreach ($this->module_ary as $row_id => $item_ary)
{
if (($item_ary['name'] === $id || $item_ary['id'] === (int) $id) && $item_ary['display'])
{
if ($mode === false || $mode === $item_ary['mode'])
{
return true;
}
}
}
return false;
}
/**
* Get parents
*/
function get_parents($parent_id, $left_id, $right_id, &$all_parents)
{
global $db;
$parents = array();
if ($parent_id > 0)
{
foreach ($all_parents as $module_id => $row)
{
if ($row['left_id'] < $left_id && $row['right_id'] > $right_id)
{
$parents[$module_id] = $row['parent_id'];
}
if ($row['left_id'] > $left_id)
{
break;
}
}
}
return $parents;
}
/**
* Get tree branch
*/
function get_branch($left_id, $right_id, $remaining)
{
$branch = array();
foreach ($remaining as $key => $row)
{
if ($row['left_id'] > $left_id && $row['left_id'] < $right_id)
{
$branch[] = $row;
continue;
}
break;
}
return $branch;
}
/**
* Build true binary tree from given array
* Not in use
*/
function build_tree(&$modules, &$parents)
{
$tree = array();
foreach ($modules as $row)
{
$branch = &$tree;
if ($row['parent_id'])
{
// Go through the tree to find our branch
$parent_tree = $parents[$row['module_id']];
foreach ($parent_tree as $id => $value)
{
if (!isset($branch[$id]) && isset($branch['child']))
{
$branch = &$branch['child'];
}
$branch = &$branch[$id];
}
$branch = &$branch['child'];
}
$branch[$row['module_id']] = $row;
if (!isset($branch[$row['module_id']]['child']))
{
$branch[$row['module_id']]['child'] = array();
}
}
return $tree;
}
/**
* Build navigation structure
*/
function assign_tpl_vars($module_url)
{
global $template;
$current_id = $right_id = false;
// Make sure the module_url has a question mark set, effectively determining the delimiter to use
$delim = (strpos($module_url, '?') === false) ? '?' : '&';
$current_padding = $current_depth = 0;
$linear_offset = 'l_block1';
$tabular_offset = 't_block2';
// Generate the list of modules, we'll do this in two ways ...
// 1) In a linear fashion
// 2) In a combined tabbed + linear fashion ... tabs for the categories
// and a linear list for subcategories/items
foreach ($this->module_ary as $row_id => $item_ary)
{
// Skip hidden modules
if (!$item_ary['display'])
{
continue;
}
// Skip branch
if ($right_id !== false)
{
if ($item_ary['left'] < $right_id)
{
continue;
}
$right_id = false;
}
// Category with no members on their way down (we have to check every level)
if (!$item_ary['name'])
{
$empty_category = true;
// We go through the branch and look for an activated module
foreach (array_slice($this->module_ary, $row_id + 1) as $temp_row)
{
if ($temp_row['left'] > $item_ary['left'] && $temp_row['left'] < $item_ary['right'])
{
// Module there and displayed?
if ($temp_row['name'] && $temp_row['display'])
{
$empty_category = false;
break;
}
continue;
}
break;
}
// Skip the branch
if ($empty_category)
{
$right_id = $item_ary['right'];
continue;
}
}
// Select first id we can get
if (!$current_id && (isset($this->module_cache['parents'][$item_ary['id']]) || $item_ary['id'] == $this->p_id))
{
$current_id = $item_ary['id'];
}
$depth = $item_ary['depth'];
if ($depth > $current_depth)
{
$linear_offset = $linear_offset . '.l_block' . ($depth + 1);
$tabular_offset = ($depth + 1 > 2) ? $tabular_offset . '.t_block' . ($depth + 1) : $tabular_offset;
}
else if ($depth < $current_depth)
{
for ($i = $current_depth - $depth; $i > 0; $i--)
{
$linear_offset = substr($linear_offset, 0, strrpos($linear_offset, '.'));
$tabular_offset = ($i + $depth > 1) ? substr($tabular_offset, 0, strrpos($tabular_offset, '.')) : $tabular_offset;
}
}
$u_title = $module_url . $delim . 'i=' . (($item_ary['cat']) ? $item_ary['id'] : $item_ary['name'] . (($item_ary['is_duplicate']) ? '&icat=' . $current_id : '') . '&mode=' . $item_ary['mode']);
// Was not allowed in categories before - /*!$item_ary['cat'] && */
$u_title .= (isset($item_ary['url_extra'])) ? $item_ary['url_extra'] : '';
// Only output a categories items if it's currently selected
if (!$depth || ($depth && (in_array($item_ary['parent'], array_values($this->module_cache['parents'])) || $item_ary['parent'] == $this->p_parent)))
{
$use_tabular_offset = (!$depth) ? 't_block1' : $tabular_offset;
$tpl_ary = array(
'L_TITLE' => $item_ary['lang'],
'S_SELECTED' => (isset($this->module_cache['parents'][$item_ary['id']]) || $item_ary['id'] == $this->p_id) ? true : false,
'U_TITLE' => $u_title
);
$template->assign_block_vars($use_tabular_offset, array_merge($tpl_ary, array_change_key_case($item_ary, CASE_UPPER)));
}
$tpl_ary = array(
'L_TITLE' => $item_ary['lang'],
'S_SELECTED' => (isset($this->module_cache['parents'][$item_ary['id']]) || $item_ary['id'] == $this->p_id) ? true : false,
'U_TITLE' => $u_title
);
$template->assign_block_vars($linear_offset, array_merge($tpl_ary, array_change_key_case($item_ary, CASE_UPPER)));
$current_depth = $depth;
}
}
/**
* Returns desired template name
*/
function get_tpl_name()
{
return $this->module->tpl_name . '.html';
}
/**
* Returns the desired page title
*/
function get_page_title()
{
global $user;
if (!isset($this->module->page_title))
{
return '';
}
return (isset($user->lang[$this->module->page_title])) ? $user->lang[$this->module->page_title] : $this->module->page_title;
}
/**
* Load module as the current active one without the need for registering it
*/
function load($class, $name, $mode = false)
{
$this->p_class = $class;
$this->p_name = $name;
// Set active module to true instead of using the id
$this->active_module = true;
$this->load_active($mode);
}
/**
* Display module
*/
function display($page_title, $display_online_list = true)
{
global $template, $user;
// Generate the page
if (defined('IN_ADMIN') && isset($user->data['session_admin']) && $user->data['session_admin'])
{
adm_page_header($page_title);
}
else
{
page_header($page_title, $display_online_list);
}
$template->set_filenames(array(
'body' => $this->get_tpl_name())
);
if (defined('IN_ADMIN') && isset($user->data['session_admin']) && $user->data['session_admin'])
{
adm_page_footer();
}
else
{
page_footer();
}
}
/**
* Toggle whether this module will be displayed or not
*/
function set_display($id, $mode = false, $display = true)
{
foreach ($this->module_ary as $row_id => $item_ary)
{
if (($item_ary['name'] === $id || $item_ary['id'] === (int) $id) && (!$mode || $item_ary['mode'] === $mode))
{
$this->module_ary[$row_id]['display'] = (int) $display;
}
}
}
/**
* Add custom MOD info language file
*/
function add_mod_info($module_class)
{
global $user, $phpEx;
if (file_exists($user->lang_path . $user->lang_name . '/mods'))
{
$add_files = array();
$dir = @opendir($user->lang_path . $user->lang_name . '/mods');
if ($dir)
{
while (($entry = readdir($dir)) !== false)
{
if (strpos($entry, 'info_' . strtolower($module_class) . '_') === 0 && substr(strrchr($entry, '.'), 1) == $phpEx)
{
$add_files[] = 'mods/' . substr(basename($entry), 0, -(strlen($phpEx) + 1));
}
}
closedir($dir);
}
if (sizeof($add_files))
{
$user->add_lang($add_files);
}
}
}
}
?>
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