<?php 
/**
* Sahana front controller, through which all actions are dispatched
*
* PHP version 4 and 5
*
* LICENSE: This source file is subject to LGPL license
* that is available through the world-wide-web at the following URI:
* http://www.gnu.org/copyleft/lesser.html
*
* @package    Sahana - http://sahana.sourceforge.net
* @author     http://www.linux.lk/~chamindra
* @copyright  Lanka Software Foundation - http://www.opensource.lk
*/

// Specify the base location of the Sahana insallation
// The base should not be exposed to the web for security reasons
// only the www sub directory should be exposed to the web

$global['approot'] = realpath(dirname(__FILE__)).'/../';
// $global['approot'] = '/usr/local/bin/sahana/';
$global['previous']=false;
// === initialize configuration variables ===
if (file_exists($global['approot'].'conf/sysconf.inc')){

    require_once ($global['approot'].'conf/sysconf.inc');
    require_once ($global['approot'].'inc/lib_modules.inc'); 
    require_once ($global['approot'].'inc/handler_db.inc');
    
    require_once ($global['approot'].'inc/lib_config.inc');
    //fetch config values : base values
    shn_config_database_fetch('base');

    require_once ($global['approot'].'inc/lib_session/handler_session.inc');
   // require_once ($global['approot'].'inc/lib_security/authenticate.inc');
    require_once ($global['approot'].'inc/lib_locale/handler_locale.inc'); 
    include_once ($global['approot'].'inc/lib_user_pref.inc');

    if(!$global['previous']){
        $global['action'] = (NULL == $_REQUEST['act']) ? 
                                "default" : $_REQUEST['act'];
        $global['module'] = (NULL == $_REQUEST['mod']) ? 
                                "home" : $_REQUEST['mod'];
    }
    $global['stream_type'] = $_GET['stream_type'];

    shn_front_controller();

} else { // Launch the web setup
    
    //Install hack     
    //require ($global['approot'].'inst/setup.inc');
    require_once ($global['approot'].'/inc/lib_st_'.$_GET['stream_type'].'.inc');
    shn_stream_init();
}

// === front controller ===

function shn_front_controller() 
{
    global $global;
    global $conf;
    $approot = $global['approot'];
    $action = $global['action'];
    $module = $global['module'];
   
    // check the users access permissions for this action
    $req_act='shn_'.$module.'_'.$action;
  //  $acl_enabled=shn_acl_get_state($module);
    //@todo Errors should be thrown properly
    
//    $module_enabled=shn_acl_is_enabled($module);
  //  $allow = (shn_acl_check_perms_action($_SESSION['user_id'],$req_act) || 
  //           !$acl_enabled)? true : false;
    
    
    // Redirect the module based on the action performed
    // redirect admin functions through the admin module
    if (preg_match('/^adm/',$action)) {
        $module = 'admin';   
        $action = 'modadmin';
    }
    
    //include the coreect streaming library 
    if($global['stream_type'] && file_exists($approot.'/inc/lib_st_'.$global['stream_type'].'.inc') ){
        require_once ($approot.'/inc/lib_st_'.$global['stream_type'].'.inc');
        if(file_exists($approot.'/mod/'.$module.'/'.$global['stream_type'].'.inc'))
            $default_file = $approot.'/mod/'.$module.'/'.$global['stream_type'].'.inc';
        else
            $default_file = 'stream.inc';
    }else
        $default_file = 'main.inc';

    // include the correct module file based on action and module
    $module_file = $approot.'mod/'.$module.'/'.$default_file;
    if (! file_exists($module_file)) {
        $module_file = $approot.'mod/home/'.$default_file;
    }

    //Initilize the stream
    if($default_file == 'stream.inc')
        shn_stream_init($module_file);

    //Include the module file
    include($module_file); 

    // include the module configuration files 
    $d = dir($approot.'mod/');
    while (false !== ($f = $d->read())) {
        if (file_exists($approot.'mod/'.$f.'/conf.inc')) {
          include ($approot.'mod/'.$f.'/conf.inc');
        }
    } 

    //Override config values with database ones
    shn_config_database_fetch('all');

//    if($allow){
        // compose and call the relevant module function 
        $module_function = 'shn_'.$module.'_'.$action;
        if (!function_exists($module_function)) {
            $module_function='shn_'.$module.'_default';
        }
        $_SESSION['last_module']=$module;
        $_SESSION['last_action']=$action;
        $output = $module_function(); 

        if($default_file == 'stream.inc')
            shn_stream_close($module_function,$output);

//   }else {
        //@todo : throw the error correctly
//    }
}
?>