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<?php
/**
* AJAX callbacks
*
* Zed. The immensity of stars. The HyperShip. The people.
*
* (c) 2010, Dereckson, some rights reserved.
* Released under BSD license.
*
* As main controller could potentially be interrupted (e.g. if site.requests
* flag is at 1, user is redirected to controllers/userrequest.php), all AJAX
* queries should be handled by this script and not directly by the controllers.
*
* Standard return values:
* -7 user is logged but perso isn't selected,
* -9 user is not logged.
*
* @package Zed
* @subpackage EntryPoints
* @author Sébastien Santoro aka Dereckson <dereckson@espace-win.org>
* @copyright 2010 Sébastien Santoro aka Dereckson
* @license http://www.opensource.org/licenses/bsd-license.php BSD
* @version 0.1
* @link http://scherzo.dereckson.be/doc/zed
* @link http://zed.dereckson.be/
* @filesource
*/
use Hypership\Geo\Point3D;
use Keruald\Database\DatabaseEngine;
use Zed\Engines\Database\Database;
use Zed\Engines\Templates\Smarty\Engine as SmartyEngine;
use Zed\Models\Geo\Location;
use Zed\Models\Objects\Content;
use Zed\Models\Objects\Perso;
use Zed\Models\Objects\User;
////////////////////////////////////////////////////////////////////////////////
///
/// Constants
///
//We define one negative number constant by standard erroneous return value.
/**
* Magic number which indicates the user is not logged in.
*/
define('USER_NOT_LOGGED', -9);
/**
* Magic number which indicates the user is logged in, but haven't selected its perso.
*/
define('PERSO_NOT_SELECTED', -7);
////////////////////////////////////////////////////////////////////////////////
///
/// Initialization
///
include('includes/core.php');
//Database
$db = Database::load($Config['database']);
//Session
$IP = $_SERVER["REMOTE_ADDR"];
require_once('includes/story/story.php'); //this class can be stored in session
session_start();
$_SESSION['ID'] = session_id();
session_update(); //updates or creates the session
//Gets current perso
$CurrentUser = get_logged_user(); //Gets current user infos
if ($perso_id = $CurrentUser->session['perso_id']) {
$CurrentPerso = new Perso($db, $perso_id);
}
//Requires user and perso
if ($CurrentUser->id < 1000) {
echo USER_NOT_LOGGED;
exit;
}
if (!$CurrentPerso) {
echo PERSO_NOT_SELECTED;
exit;
}
//Loads Smarty (as it handles l10n, it will be used by lang_get)
$smarty = SmartyEngine::load()->getSmarty();
//Loads language files
initialize_lang();
lang_load('core.conf');
////////////////////////////////////////////////////////////////////////////////
///
/// Actions definitions
///
/**
* Actions class
*
* Each method is called by first part of your URL, other parts are arguments
* e.g. /do.php/validate_quux_request/52 = Actions::validate_quux_request(52);
*
* You can also use $_GET, $_POST or better $_REQUEST.
*
* Don't print the value but return it, so we can in the future implement custom
* formats like api_output();
*/
class Actions {
///
/// Properties
///
public Perso $CurrentPerso;
public User $CurrentUser;
///
/// Available actions
///
public DatabaseEngine $db;
/**
* Checks the arguments hash and determines whether it is valid.
*
* @param Array $args the arguments, the last being the hash
* @return boolean true if the hash is valid ; otherwise, false.
*/
static private function is_hash_valid ($args) {
global $Config;
return array_pop($args) == md5($_SESSION['ID'] . $Config['SecretKey'] . implode('', $args));
}
/**
* Handles a allow/deny perso request.
*
* @param string $request_flag the request flag to clear
* @param string $store 'perso' or 'registry'
* @param string $key the perso flag or registry key
* @param string $value the value to store
* @param string $hash the security hash
* @return boolean true if the request is valid and have been processed ; otherwise, false.
*/
public function perso_request ($request_flag, $store, $key, $value, $hash) : bool {
//Ensures we've the correct amount of arguments
if (func_num_args() < 4) {
return false;
}
//Checks hash
$args = func_get_args();
if (!self::is_hash_valid($args)) {
return false;
}
//Sets flag
switch ($store) {
case 'perso':
$this->CurrentPerso->set_flag($key, $value);
break;
case 'registry':
registry_set($this->db, $key, $value);
break;
default:
//Unknown storage location
return false;
}
//Clears request flag
if ((string)$request_flag !== "0") {
$this->CurrentPerso->delete_flag($request_flag);
}
return true;
}
/**
* Sets current perso's local location.
*
* We don't require a security hash. If the users want to play with it, no problem.
* You generally move inside a global location as you wish.
* So, if you write a story capturing a perso, use flags to handle this escape!
*
* @param string $location_local the local location
* @return Location the current perso's Location object
*/
public function set_local_location ($location_local) {
//Ensures we've the correct amount of arguments
if (func_num_args() < 1) {
return null;
}
//Moves current perso to specified location
$location_local = urldecode($location_local);
$this->CurrentPerso->move_to(null, $location_local);
//Returns Location relevant instance
return $this->CurrentPerso->location;
}
/**
* Moves the current perso's, setting a new local location.
*
* We don't require a security hash. If the users want to play with it, no problem.
* You generally move inside a global location as you wish.
* So, if you write a story capturing a perso, use flags to handle this escape!
*
* @param string $move the move (coordinates or direction)
* @param int $factor a number multiplying the specified move [optional]
* @return Location the current perso's Location object
*
* e.g. to move from 2 units to east, you can use one of those instructions:
* local_move('east', 2);
* local_move('2,0,0');
* local_move('1,0,0', 2);
*
* Valid moves string are north, east, south, west, up and down.
* Valid moves coordinates are x,y,z (3 integers, comma as separator)
*/
public function local_move ($move, $factor = 1) {
//Ensures we've the correct amount of arguments
if (func_num_args() < 1) {
return null;
}
//Parses $move
switch ($move) {
case 'north':
$move = [0, 1, 0];
break;
case 'east':
$move = [1, 0, 0];
break;
case 'south':
$move = [0, -1, 0];
break;
case 'west':
$move = [-1, 0, 0];
break;
case 'up':
$move = [0, 0, 1];
break;
case 'down':
$move = [0, 0, -1];
break;
default:
$move = explode(',', $move, 3);
foreach ($move as $coordinate) {
if (!is_numeric($coordinate)) {
return null;
}
}
}
//Moves current perso to specified location
if ($location_local = Point3D::fromString($this->CurrentPerso->location->local)) {
$location_local->translate(
(float)$move[0] * $factor,
(float)$move[1] * $factor,
(float)$move[2] * $factor
);
$this->CurrentPerso->move_to(null, $location_local->sprintf("(%d, %d, %d)"));
//Returns Location relevant instance
return $this->CurrentPerso->location;
}
//Old local location weren't a Point3D
return null;
}
/**
* Moves the current perso's, setting a new local location, using polar+z coordinates.
* Polar+z coordinates are polar coordinates, plus a cartesian z dimension.
*
* We don't require a security hash. If the users want to play with it, no problem.
* You generally move inside a global location as you wish.
* So, if you write a story capturing a perso, use flags to handle this escape!
*
* @param string $move the move (coordinates or direction)
* @param int $factor a number multiplying the specified move [optional]
* @return Location the current perso's Location object
*
* Valid moves string are cw, ccw, out, in, up and down.
* r: out = +12 in = -12
* °: cw = +20° ccw = -20
* Valid moves coordinates are r,°,z (3 integers, comma as separator)
* (the medium value can also be integer + °)
*
* e.g. to move of two units (the unit is 20°) clockwise:
* polarz_local_move('cw', 2);
* polarz_local_move('(0, 20°, 0)', 2);
* polarz_local_move('(0, 40°, 0)');
* Or if you really want to use radians (PI/9 won't be parsed):
* polarz_local_move('(0, 0.6981317007977318, 0)';
*
*/
public function polarz_local_move ($move, $factor = 1) {
//Ensures we've the correct amount of arguments
if (func_num_args() < 1) {
return null;
}
//Parses $move
$move = urldecode($move);
switch ($move) {
case 'cw':
$move = [0, '20°', 0];
break;
case 'ccw':
$move = [0, '-20°', 0];
break;
case 'in':
$move = [+12, 0, 0];
break;
case 'out':
$move = [-12, 0, 0];
break;
case 'up':
$move = [0, 0, 1];
break;
case 'down':
$move = [0, 0, -1];
break;
default:
$move = explode(',', $move, 3);
foreach ($move as $coordinate) {
if (!is_numeric($coordinate) && !preg_match("/^[0-9]+ *°$/", $coordinate)) {
return null;
}
}
}
dieprint_r($move);
//Moves current perso to specified location
throw new Exception("Move is not implemented.");
//Old local location weren't a 3D point
return null;
}
/**
* Moves the current perso's, setting a new global and local location.
*
* @param string $location_global The global location
* @param string $location_local The local location
* @return Location the current perso's Location object
*/
public function global_move ($location_global, $location_local = null) {
//Ensures we've the correct amount of arguments
if (func_num_args() < 1) {
return null;
}
//Checks hash
$args = func_get_args();
if (!self::is_hash_valid($args)) {
return false;
}
//Moves
$this->CurrentPerso->move_to($location_global, $location_local);
return $this->CurrentPerso->location;
}
/**
* Handles upload content form.
*
* @return string new content path
*/
public function upload_content () {
//Initializes a new content instance
$content = new Content($db);
$content->load_from_form();
$content->user_id = $this->CurrentUser->id;
$content->perso_id = $this->CurrentPerso->id;
$content->location_global = $this->CurrentPerso->location_global;
//Saves file
if ($content->handle_uploaded_file($_FILES['artwork'])) {
$content->save_to_database();
$content->generate_thumbnail();
return true;
}
return false;
}
/**
* Gets multimedia content for the specified location
*
* @param string $location_global The global location (local is to specified in ?location_local parameter)
* @return Array an array of Content instances
*/
public function get_content ($location_global) {
//Ensures we've the correct amount of arguments
if (func_num_args() < 1) {
return null;
}
//Checks hash
$args = func_get_args();
if (!self::is_hash_valid($args)) {
return false;
}
//Checks local location is specified somewhere (usually in $_GET)
if (!array_key_exists('location_local', $_REQUEST)) {
return false;
}
//Gets content
return Content::get_local_content($this->db, $location_global, $_REQUEST['location_local']);
}
}
////////////////////////////////////////////////////////////////////////////////
///
/// Handles request
///
//Parses URL
$Config['SiteURL'] = get_server_url() . $_SERVER["PHP_SELF"];
$args = get_current_url_fragments();
$method = array_shift($args);
$actions = new Actions();
$actions->db = $db;
$actions->CurrentPerso = $CurrentPerso;
$actions->CurrentUser = $CurrentUser;
$debug = $_REQUEST['debug'] ?? $_SESSION['debug'] ?? false;
if ($debug) {
//Debug version
//Most of E_STRICT errors are evaluated at the compile time thus such errors
//are not reported
ini_set('display_errors', 'stderr');
error_reporting(-1);
if (method_exists($actions, $method)) {
$result = call_user_func_array([$actions, $method], $args);
header('Content-type: application/json; charset=utf-8');
echo json_encode($result);
} else {
echo "<p>Method doesn't exist: $method</p>";
}
if (array_key_exists('redirectTo', $_REQUEST)) {
//If user JS disabled, you can add ?redirectTo= followed by an URL
echo "<p>Instead to print a callback value, redirects to <a href=\"$_REQUEST[redirectTo]\">$_REQUEST[redirectTo]</a></p>";
}
} else {
//Prod version doesn't prints warning <== silence operator
if (method_exists($actions, $method)) {
$result = @call_user_func_array([$actions, $method], $args);
if (array_key_exists('redirectTo', $_REQUEST)) {
//If user JS disabled, you can add ?redirectTo= followed by an URL
header("location: " . $_REQUEST['redirectTo']);
} else {
header('Content-type: application/json; charset=utf-8');
echo json_encode($result);
}
}
}

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