source: inc/admin/class.dc.admincontext.php @ 1156:92f840a91f98

<?php
# -- BEGIN LICENSE BLOCK ---------------------------------------
#
# This file is part of Dotclear 2.
#
# Copyright (c) 2003-2011 Olivier Meunier & Association Dotclear
# Licensed under the GPL version 2.0 license.
# See LICENSE file or
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK -----------------------------------------
if (!defined('DC_RC_PATH')) { return; }


class dcProxy {
     protected $object;
     protected $attributes;
     protected $methods;
     protected $default;
     protected $denyfirst;

    /**
     * valuesToArray - converts a list of strings to an array having these strings as keys.
     * 
     * @param mixed $val the list to convert.
     * @access protected
     * @return mixed Value The resulting array
     */
     protected function valuesToArray($val) {
          $arr = array();
          foreach ($val as $k) {
               $arr[$k]=true;
          }
          return $arr;
     }

     protected function isAllowed ($name,$list) {
          if ($this->denyfirst) {
               return isset($list[$name]);
          } else {
               return !isset($list[$name]);
          }
     }

     public function __construct($object,$rights,$default='',$denyfirst=true) {
          $this->object = $object;
          $this->attributes = array();
          $this->methods = array();
          $this->denyfirst = $denyfirst;
          if (isset($rights['attr'])) {
               $this->attributes = $this->valuesToArray($rights['attr']);
          }
          if (isset($rights['methods'])) {
               $this->methods = $this->valuesToArray($rights['methods']);
          }
     }

     public function __get($name) {
          if ($this->isAllowed($name,$this->attributes)) {
               return $this->object->$name;
          } else {
               return $this->default;
          }
     }

     public function __call($name,$args) {
          if ($this->isAllowed($name,$this->methods) &&
               is_callable(array($this->object,$name))) {
               return call_user_func_array(array($this->object,$name),$args);
          } else {
               return $this->default;
          }

     }
}

class dcArrayProxy extends dcProxy implements ArrayAccess {
     public function offsetExists ($offset) {
          return (isset($this->value[$offset]));
     }
     public function offsetGet ($offset) {
          return new ProxyValue($this->object[$offset],$this->rights);
     }
     public function offsetSet ($offset ,$value ) {
          // Do nothing, we are read only
     }
     public function offsetUnset ($offset) {
          // Do nothing, we are read only
     }
}


/**
@ingroup DC_CORE
@brief Template extension for admin context

This extends template environment with tools required in admin context.
*/
class dcAdminContext extends Twig_Extension
{
     protected $core;
     protected $globals = array();
     protected $protected_globals = array();
     protected $memory = array();
     
     public function __construct($core)
     {
          $this->core = $core;
          
          # Globals editable via context
          $this->globals = array();
          
          # Globals not editable via context
          $this->protected_globals = array(
               'messages' => array(
                    'static' => array(),
                    'lists' => array(),
                    'alert' => '',
                    'errors' => array()
               ),
               
               'page_title'   => array(),
               'page_global'  => false,
               
               'admin_url'    => DC_ADMIN_URL,
               'theme_url'    => '',
               'plugin_url'   => DC_ADMIN_URL.'index.php?pf=',
               
               'version'           => DC_VERSION,
               'vendor_name'  => DC_VENDOR_NAME,
               
               'safe_mode'    => isset($_SESSION['sess_safe_mode']) && $_SESSION['sess_safe_mode'],
               'debug_mode'   => DC_DEBUG
          );
     }
     
     /**
     Prevent call crash from template on method that return this class
     */
     public function __toString()
     {
          return '';
     }
     
     /**
     Test a global variable
     
     @param string $name Name of the variable to test
     @return boolean
     */
     public function __isset($name)
     {
          return isset($this->globals[$name]);
     }
     
     /**
     Add a global variable
     
     @param string $name Name of the variable
     @param mixed $value Value of the variable
     */
     public function __set($name,$value)
     {
/*
          # Overload protect
          if ($value === null && isset($this->globals[$name])) {
               unset($this->globals[$name]);
          }
          elseif (!isset($this->globals[$name])) {
               throw new Exception('Modification of overloaded globals has no effect');
          }
//*/
          $this->globals[$name] = $value;
     }
     
     /**
     Get a global variable
     
     @param string $name Name of the variable
     @return mixed Value of the variable or null
     */
     public function __get($name)
     {
          return isset($this->globals[$name]) ? $this->globals[$name] : null;
     }
     
     /**
     Returns a list of filters to add to the existing list.
     
     @return array An array of filters
     */
     public function getFilters()
     {
          return array(
               'trans' => new Twig_Filter_Function("__", array('is_safe' => array('html')))
          );
     }
     
     /**
     Returns a list of functions to add to the existing list.
     
     @return array An array of functions
     */
     public function getFunctions()
     {
          return array(
               '__'           => new Twig_Function_Function("__", array('is_safe' => array('html'))),
               'debug_info' => new Twig_Function_Method($this, 'getDebugInfo', array('is_safe' => array('html'))),
               'memorize' => new Twig_Function_Method($this, 'setMemory', array('is_safe' => array('html'))),
               'memorized' => new Twig_Function_Method($this, 'getMemory', array('is_safe' => array('html'))),
               'build_url' => new Twig_Function_Method($this,'buildUrl', array('is_safe' => array('html')))
          );
     }
     

    /**
     * Builds an url given a base, and parameters
     * 
     * @param mixed $url    the base url as string
     * @param mixed $params the parameters.
     *
     * @access public
     *
     * @return string the resulting url.
     */
     public function buildUrl($url,$params=array()) {
          if (is_array($url) && isset($url[0])) {
               $base = $url[0];
               if (isset($url[1]) && is_array($url[1])) {
                    $p = array_merge($params,$url[1]);
               }
          } else {
               $base = $url;
               $p=$params;
          }
          if (empty($p)) {
               return $base;
          } else {
               return $base.'?'.http_build_query($p);
          }
     }

     /**
     Returns a list of global variables to add to the existing list.
     
     This merges overloaded variables with defined variables.
     
     @return array An array of global variables
     */
     public function getGlobals()
     {
          $this->getBlogs();
          $this->getCurrentBlog();
          $this->getCurrentUser();
          $this->getMenus();
          
          # Additional globals
          $p = path::info($_SERVER['REQUEST_URI']);
          $this->protected_globals['current_page'] = $p['base'];
          $this->protected_globals['blog_count'] = $this->core->auth->blog_count;
          $this->protected_globals['rtl'] = l10n::getTextDirection(
               $this->protected_globals['current_user']['lang']) == 'rtl';
          $this->protected_globals['session'] = array(
               'id' => session_id(),
               'uid' => isset($_SESSION['sess_browser_uid']) ? $_SESSION['sess_browser_uid'] : '',
               'nonce' => $this->core->getNonce()
          );
          
          # Keep protected globals safe
          return array_merge($this->globals,$this->protected_globals);
     }
     
     /**
     Returns the name of the extension.
     
     @return string The extension name
     */
     public function getName()
     {
          return 'AdminContext';
     }
     
     
     /**
     Add an informational message
     
     @param string $message A message
     @return object self
     */
     public function setSafeMode($safe_mode)
     {
          $this->protected_globals['safe_mode'] = (boolean) $safe_mode;
          return $this;
     }
     
     /**
     Add an informational message
     
     @param string $message A message
     @return object self
     */
     public function addMessageStatic($message)
     {
          $this->protected_globals['messages']['static'][] = $message;
          return $this;
     }
     
     /**
     Add a list of informational messages
     
     @param string $message A title
     @param array $message A list of messages
     @return object self
     */
     public function addMessagesList($title,$messages)
     {
          $this->protected_globals['messages']['lists'][$title] = $messages;
          return $this;
     }
     
     /**
     Set an important message
     
     @param string $message A message
     @return object self
     */
     public function setAlert($message)
     {
          $this->protected_globals['messages']['alert'] = $message;
          return $this;
     }
     
     /**
     Add an error message
     
     @param string Error message
     @return object self
     */
     public function addError($error)
     {
          $this->protected_globals['messages']['errors'][] = $error;
          return $this;
     }
     
     /**
     Check if there is an error message
     
     @return boolean
     */
     public function hasError()
     {
          return !empty($this->protected_globals['messages']['errors']);
     }
     
     /**
     Fill the page title
     
     $title can be: 
     a string for page title part or 
     TRUE to add blog name at the begining of title or
     NULL to empty/reset title
     
     @param mixed $title A title part
     @param boolean $url Link of the title part
     @return object self
     */
     public function fillPageTitle($title,$url='')
     {
          if (is_bool($title)) {
               $this->protected_globals['page_global'] = $title;
          }
          elseif (null === $title) {
               $this->protected_globals['page_global'] = false;
               $this->protected_globals['page_title'] = array();
          }
          else {
               $this->protected_globals['page_title'][] = array(
                    'title' => $title,
                    'link' => $url
               );
          }
          return $this;
     }
     
     /**
     Check if a page title is set
     */
     public function hasPageTitle()
     {
          return !empty($this->protected_globals['page_title']);
     }
     
     /**
     Get list of blogs
     */
     protected function getBlogs()
     {
          $blog_id = '';
          
          # Blogs list
          $blogs = array();
          if ($this->core->auth->blog_count > 1 && $this->core->auth->blog_count < 20) {
               $blog_id = $this->core->blog->id;
               $rs_blogs = $this->core->getBlogs(array('order'=>'LOWER(blog_name)','limit'=>20));
               while ($rs_blogs->fetch()) {
                    $blogs[$rs_blogs->blog_id] = $rs_blogs->blog_name.' - '.$rs_blogs->blog_url;
                    $this->protected_globals['blogs'][$rs_blogs->blog_id] = 
                    new dcArrayProxy($rs_blogs, array(
                         'blog_id','blog_name','blog_desc','blog_url','blog_creadt','blog_upddt'));
               }
          }
          
          # Switch blog form
          $form = new dcForm($this->core,'switchblog_menu','index.php');
          $form
               ->addField(
                    new dcFieldCombo('switchblog',$blog_id,$blogs,array(
                    'label' => __('Blogs:'))))
               ->addField(
                    new dcFieldSubmit('switchblog_submit',__('ok'),array(
                    'action' => 'switchblog')))
               ->setup();
     }
     
     /**
     Get current blog information
     */
     protected function getCurrentBlog()
     {
          $this->protected_globals['current_blog'] = $this->core->auth->blog_count ?
               new dcProxy($this->core->blog,array(
                    'id','name','desc','url','host','creadt','upddt'
               )) : array(
                    'id'      => '',
                    'name'    => '',
                    'desc'    => '',
                    'url'     => '',
                    'host'    => '',
                    'creadt'  => '',
                    'upddt'   => ''
               );
     }
     
     /**
     Get current user information
     */
     protected function getCurrentUser()
     {
          $infos = array(
               'pwd','name','firstname','displayname',
               'email','url','default_blog','lang','tz',
               'post_status','creadt','upddt','cn'
          );
          
          $user = array(
               'id' => '',
               'super' => false,
               'lang' => 'en',
               'options' => $this->core->userDefaults(),
               'prefs' => array(),
               'rights' => array(
                    'media' => false
               )
          );
          
          foreach($infos as $i) {
               $user[$i] = '';
          }
          
          if ($this->core->auth->userID()) {
          
               $user = array(
                    'id' => $this->core->auth->userID(),
                    'super' => $this->core->auth->isSuperAdmin(),
                    'options' => $this->core->auth->getOptions(),
                    'rights' => array(
                         'media' => $this->core->auth->check('media,media_admin',$this->core->blog->id)
                    )
               );
               
               foreach($infos as $i) {
                    $user[$i] = $this->core->auth->getInfo('user_'.$i);
               }
               
               foreach($this->core->auth->user_prefs->dumpWorkspaces() as $ws => $prefs) {
                    $user['prefs'][$ws] = $prefs->dumpPrefs();
               }
          }
          
          $this->protected_globals['current_user'] = $user;
     }
     
     /**
     Get sidebar menus
     */
     protected function getMenus()
     {
          global $_menu;
          
          $this->protected_globals['menus'] = array();
          
          if (!isset($_menu)) {
               return;
          }
          
          foreach($_menu as $m) {
               $this->protected_globals['menus'][] = array(
                    'id'           => $m->getID(),
                    'title'        => $m->getTitle(),
                    'separator'    => $m->getSeparator(),
                    'items'        => $m->getItems()
               );
          }
     }
     
     /**
     Get an array of debug/dev infos
     */
     public function getDebugInfo()
     {
          if (!DC_DEBUG) {
               return array();
          }
          
          $di = array(
               'global_vars' => implode(', ',array_keys($GLOBALS)),
               'memory' => array(
                    'usage' => memory_get_usage(),
                    'size' => files::size(memory_get_usage())
               ),
               'xdebug' => array()
          );
          
          if (function_exists('xdebug_get_profiler_filename')) {
          
               $url = http::getSelfURI();
               $url .= strpos($url,'?') === false ? '?' : '&';
               $url .= 'XDEBUG_PROFILE';
               
               $di['xdebug'] = array(
                    'elapse_time' => xdebug_time_index(),
                    'profiler_file' => xdebug_get_profiler_filename(),
                    'profiler_url' =>  $url
               );
               
               /* xdebug configuration:
               zend_extension = /.../xdebug.so
               xdebug.auto_trace = On
               xdebug.trace_format = 0
               xdebug.trace_options = 1
               xdebug.show_mem_delta = On
               xdebug.profiler_enable = 0
               xdebug.profiler_enable_trigger = 1
               xdebug.profiler_output_dir = /tmp
               xdebug.profiler_append = 0
               xdebug.profiler_output_name = timestamp
               */
          }
          
          return $di;
     }
     
     /**
     Add a value in a namespace memory
     
     This help keep variable when recalling Twig macros
     
     @param string $ns A namespace
     @param string $str A value to memorize in this namespace
     */
     public function setMemory($ns,$str)
     {
          if (!array_key_exists($ns,$this->memory) || !in_array($str,$this->memory[$ns])) {
               $this->memory[$ns][] = $str;
          }
     }
     
     /**
     Check if a value is previously memorized in a namespace
     
     @param string $ns A namespace
     @param string $str A value to search in this namespace
     @return array True if exists
     */
     public function getMemory($ns,$str)
     {
          return array_key_exists($ns,$this->memory) && in_array($str,$this->memory[$ns]);
     }
}
?>