<?php
/*
  ----------------------------------------------------------------------
  AlternC - Web Hosting System
  Copyright (C) 2000-2012 by the AlternC Development Team.
  https://alternc.org/
  ----------------------------------------------------------------------
  LICENSE
  
  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License (GPL)
  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 more details.
  
  To read the license please visit http://www.gnu.org/copyleft/gpl.html
  ----------------------------------------------------------------------
  Purpose of file: Manage piwik Statistics set
  ----------------------------------------------------------------------
*/

/**
 * This class manage piwik statistics management through AlternC, using piwik's "API".
 */
class m_piwik {
  var $piwik_server_uri;
  var $piwik_admin_token;
  var $alternc_users;
  var $alternc_sites;

  function hook_menu() {
    global $quota;
    if ( empty($this->piwik_server_uri) || empty($this->piwik_admin_token)) return false;

    $obj = array(
      'title'       => _("Piwik statistics"),
      'ico'         => 'images/piwik.png',
      'link'        => 'toggle',
      'pos'         => 115,
      'links'       => array(
         array( 'txt' => _("Piwik Users"), 'url' => 'piwik_userlist.php'),
         array( 'txt' => _("Piwik Sites"), 'url' => 'piwik_sitelist.php'),
       ),
     ) ;

     return $obj;
  }

  /*---------------------------------------------------------------------------*/
  /** Constructor
  */
  function m_piwik() {
    $this->piwik_server_uri=variable_get('piwik_server_uri',null,'Remote Piwik server uri');
    $this->piwik_admin_token=variable_get('piwik_admin_token',null,'Remote Piwik super-admin token');
    $this->alternc_users = $this->get_alternc_users();
    $this->alternc_sites = $this->get_alternc_sites();
  }

  /* ----------------------------------------------------------------- */
  /** hook called when an AlternC account is deleted
   */
  function hook_admin_del_member() {
    //FIXME : implement the hook_admin_del_member for piwik
    return true;
  }


  /* ----------------------------------------------------------------- */
  /** Returns the used quota for the $name service for the current user.
   * @param $name string name of the quota 
   * @return integer the number of service used or false if an error occured
   * @access private
   */
  function hook_quota_get() {
    global $db, $cuid;
    $db->query("SELECT COUNT(id) AS nb FROM piwik_users WHERE uid='$cuid'");
    $q=Array("name"=>"piwik", "description"=>_("Statistics through Piwik accounts"), "used"=>0);
    if ($db->next_record()) {
      $q['used']=$db->f('nb');
    }
    return $q;
  }


  function url() {
    return $this->piwik_server_uri;
  }


  /***********************/
  /* User-related tasks */
  /***********************/


  function user_add($user_login, $user_mail = null) {

        global $db, $mem, $cuid, $err;

        $user_login = $this->clean_user_name($user_login);
	$user_pass  = create_pass();
	$user_mail  = $user_mail ? $user_mail : $mem->user['mail'];
	$user_mail = create_pass(4) . '@gmail.com'; // FIXME $user_mail; Unicité sur les emails ... Soit on ajoute + random soit, on prompt
	$user_alias = $user_login;

	$api_data = $this->call_privileged_page('API', 'UsersManager.addUser', array('userLogin' => $user_login, 'password' => $user_pass, 'email' => $user_mail, 'alias' => $user_alias), 'JSON'); 
	if ($api_data) {
	  if ($api_data->result === 'success') {
	    $user = $this->get_user($user_login);
	    $user_creation_date = $user->date_registered;
	    return $db->query("INSERT INTO piwik_users (uid, login, created_date) VALUES ('$cuid', '$user_login', '$user_creation_date')");
	  }
	} else { // api_data = false -> error is already filled
	  return FALSE;
	}
  }


  // Edite un user
  function user_edit() {
    //FIXME
    return true;
  }

  function get_site_access($user_login) {
	return $this->call_privileged_page('API', 'UsersManager.getSitesAccessFromUser', array('userLogin' => $user_login));
  }

  function get_users_access_from_site($site_id) {
	global $err, $cuid;

	if (!is_numeric($site_id)) {
		$err->raise('piwik', 'site_id must be numeric');
		return FALSE;
	}
	if (!in_array($site_id, $this->alternc_sites)) {
		$err->raise('piwik', "you don't own this piwik website");
		return FALSE;
	}

	$api_data = $this->call_privileged_page('API', 'UsersManager.getUsersAccessFromSite', array('idSite' => $site_id));
	if ($api_data !== FALSE) {
		$api_data = $api_data[0]; // Data is in the first column
		foreach ($this->alternc_users AS $key=>$user) {
			if (!array_key_exists($user, $api_data)) {                                                            
                                $api_data->$user = 'noaccess';                                                                
                        } 
		}
		return $api_data;
	}
	else return FALSE; 
  }

  function get_user($user_login) {
    $api_data = $this->call_privileged_page('API', 'UsersManager.getUser', array('userLogin' => $user_login));

    if ($api_data)
      return $api_data[0];
    else
      return FALSE;
  }

  function get_alternc_users() {
	global $db, $cuid;

	static $alternc_users = array();
	$db->query("SELECT login FROM piwik_users WHERE uid='$cuid'");
	while ($db->next_record())
		array_push($alternc_users, $db->f('login'));
	
	return $alternc_users;
  }
  // Supprime l'utilisateur Piwik passé en parametre
  // Ne le supprime pas localement tant que pas supprimé en remote
  function user_delete($piwik_user_login) {
    global $db, $cuid, $err;
    
    $db->query("SELECT created_date, COUNT(id) AS cnt FROM piwik_users WHERE uid='$cuid' AND login='$piwik_user_login'");
    $db->next_record();

    if ($db->f('cnt') == 1) {
	$api_data = $this->call_privileged_page('API', 'UsersManager.deleteUser', array('userLogin' => $piwik_user_login));
	if ($api_data->result == 'success') {
		return $db->query("DELETE FROM piwik_users WHERE uid='$cuid' AND login='$piwik_user_login'");
	}
	else {
		return FALSE;
	}
    } else {
      $err->raise("piwik", _("You are not allowed to delete the statistics of this website"));
      return FALSE;
    }
  }
 

  function users_list() { 
    global $db, $cuid;
    $db->query("SELECT login FROM piwik_users WHERE uid = '$cuid'");
    if ($db->num_rows() == 0)
      return array();
    $users = '';
    while ($db->next_record())
	$users .= ($users !== '') ? ',' . $db->f('login') : $db->f('login');
    return $this->call_privileged_page('API', 'UsersManager.getUsers', array('userLogins' => $users)); 
  }


  // Verifie que l'utilisateur existe bien dans piwik
  function user_checkremote($puser_id) {
    //FIXME
    return true;
  }


  // Récupére un token pour le SSO avec piwik pour l'user
  function user_remoteauth() {
    //FIXME
    return true;
  }

  // Montre la liste des site pour lesques un user à accés
  function user_access() {
    // FIXME
    return true;
  }


  /***********************/
  /* Site-related tasks */
  /***********************/


  function site_list() {
    $api_data = $this->call_privileged_page('API', 'SitesManager.getAllSites');
    $data = array();

    if($api_data) {
      foreach ($api_data AS $site) {

        if (!in_array($site->idsite, $this->alternc_sites)) 
	   continue;

	$item = new stdClass();

	$item->id       = $site->idsite;
	$item->name     = $site->name;
	$item->main_url = $site->main_url;

	$user_data = $this->call_privileged_page('API', 'UsersManager.getUsersAccessFromSite', array('idSite' => $site->idsite));

	//if (is_array($user_data)) {
	    // printvar($user_data);
	  //} else if(is_object($user_data)) {
	    $item->rights = $user_data[0];
	  //}

	$data[] = $item;
      }
      return $data;
    } else
      return FALSE;
  }

  function site_js_tag($site_id) {
	return $this->call_privileged_page('API', 'SitesManager.getJavascriptTag', array('idSite' => $site_id, 'piwikUrl' => $this->piwik_server_uri))->value;
  }

  function get_alternc_sites() {
        global $db, $cuid;

        static $alternc_sites = array();
        $db->query("SELECT piwik_id AS site_id FROM piwik_sites WHERE uid='$cuid'");
        while ($db->next_record())
                array_push($alternc_sites, $db->f('site_id'));

        return $alternc_sites;
  }

  function get_site_list()
  {
       return $this->call_privileged_page('API', 'SitesManager.getAllSites');
  }
  // Ajoute un site à Piwik
  // can't figure out how to pass multiple url through the API
  function site_add($siteName, $urls, $ecommerce = FALSE) {
    $urls = is_array($urls) ? implode(',', $urls) : $urls;
    $api_data = $this->call_privileged_page('API', 'SitesManager.addSite', array('siteName' => $siteName, 'urls' => $urls));
    printvar($api_data);
    return TRUE;
  }


  //SitesManager.deleteSite (idSite)
  // Supprime un site de Piwik
  function site_delete($site_id) {
    global $db, $cuid, $err;
    
    $db->query("SELECT COUNT(id) AS cnt FROM piwik_sites WHERE uid='$cuid' AND piwik_id='$site_id'");
    $db->next_record();

    if ($db->f('cnt') == 1) {
	$api_data = $this->call_privileged_page('API', 'SitesManager.deleteSite', array('idSite' => $site_id));
 	
	if ($api_data->result == 'success') {
		return $db->query("DELETE FROM piwik_sites where uid='$cuid' AND piwik_id='$site_id' LIMIT 1");
	} else {
		return FALSE;
	}
    } else {
	$err->raise("piwik", _("You are not allowed to delete the statistics of this website"));
	return FALSE;
    }

    return true;
  }
 

    function site_set_user_right($site_id, $login, $right)
    {
	global $err;
	if (!in_array($right, array('noaccess', 'view', 'admin')))
		return FALSE;
	$api_data = $this->call_privileged_page('API', 'UsersManager.setUserAccess', array('userLogin' => $login, 'access' => $right, 'idSites' => $site_id));
	if ($api_data->result == 'success') {
		return TRUE;
	} else {
		$err->raise('piwik', $api_data->messsage);
		return FALSE;
	}
    }
  // Ajoute un alias sur un site existant
  function site_alias_add() {
    // FIXME
    return true;
  }


  /* Helper code FIXME: rename those function using "private" + "_" prefix  */

  function clean_user_name($username) {
    return mysql_real_escape_string(trim($username));
  }


  function dev() {
    // $this->call_page('module', 'method', array('user' => 'fser', 'pass' => 'toto'));
    // return $this->users_list();
  }


  function call_page($module, $method, $arguments=array(), $output = 'JSON') {
    global $err;
	$url = sprintf('%s/?module=%s&method=%s&format=%s', $this->piwik_server_uri, $module, $method, $output);
	foreach ($arguments AS $k=>$v)
	  $url .= sprintf('&%s=%s', urlencode($k), $v); //  urlencode($v));

	$page_content = file_get_contents($url);
	if ($page_content === FALSE) {
	  $err->raise("piwik", _("Unable to reach the API"));
	  return FALSE;
	}
	if ($output == 'JSON') {
	  $api_data = json_decode($page_content);
	  if ($api_data === FALSE) {
	    $err->raise("piwik", _("Error while decoding response from the API"));
	    return FALSE;
	  }

	  return $api_data;
	} else {
	  $err->raise("piwik", _("Other format than JSON is not implemented yet"));
	  return FALSE;
	}
  }


  function call_privileged_page($module, $method, $arguments=array(), $output = 'JSON') {
	$arguments['token_auth'] = $this->piwik_admin_token;
	return $this->call_page($module, $method, $arguments, $output);
  }


} /* Class piwik */