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scene.php
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scene.php
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<?php
/**
* Geo scene class.
*
* Zed. The immensity of stars. The HyperShip. The people.
*
* (c) 2010, Dereckson, some rights reserved.
* Released under BSD license.
*
* @package Zed
* @subpackage Geo
* @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
*/
require_once('location.php');
require_once('octocube.php');
require_once('sceneindex.php');
if (!defined('SCENE_DIR')) {
/**
* The directory containing scenes files
*/
define('SCENE_DIR', 'content/scenes');
}
/**
* Geo scene class
*
* This class provides methods to determine and renders the local scene.
*/
class GeoScene {
/**
* Last error or warning
*
* @var string
*/
public $lastError;
/**
* File scene to serve
*
* @var string
*/
public $sceneFile;
/**
* The location of the scene to print
*
* @var GeoLocation
*/
public $location;
/**
* Initializes a new GeoScene instance
*
* @param GeoLocation $location location the scene is to print
*/
function __construct ($location) {
$this->location = $location;
//Gets local scene
if ($location->containsLocalLocation) {
if ($this->get_local_scene()) return;
}
//Gets global scene
if ($location->containsGlobalLocation) {
if ($this->get_global_scene()) return;
}
//If not scene found, let's set a warning
$this->lastError = "No scene found.";
}
/**
* Gets local scene
*
* @return boolean true if a scene have been found ; otherwise, false.
*/
private function get_local_scene () {
//From the index
$index = GeoSceneIndex::Load(SCENE_DIR);
if ($tpl = $index->get_local_template($this->location->global, $this->location->local)) {
$this->sceneFile = SCENE_DIR . '/' . $tpl;
return true;
}
//From filename
$expression = $this->location->global . ' ' . $this->location->local;
if ($this->try_get_scene($expression)) {
return true;
}
return false;
}
/**
* Gets global scene
*
* @return boolean true if a scene have been found ; otherwise, false.
*/
private function get_global_scene () {
$location = $this->location;
if ($location->place) {
if ($this->try_get_scene($location->global)) {
return true;
}
}
if ($location->body) {
if ($this->try_get_scene('B' . $location->body->code)) {
return true;
}
}
return false;
}
/**
* Gets file extension
*
* @param string $file the file path
* @return string the file extension
*/
public static function get_file_extension ($file) {
$pathinfo = pathinfo($file);
return $pathinfo['extension'];
}
/**
* Renders the file
*
* @todo Add standard code to render .swf Flash/ShockWave files.
*/
public function render () {
if ($file = $this->sceneFile) {
switch ($ext = GeoScene::get_file_extension($file)) {
case 'png':
case 'jpg':
case 'gif':
case 'bmp':
echo "<img src=\"$file\" />";
break;
case 'tpl':
global $smarty;
$template_dir = $smarty->template_dir;
$smarty->template_dir = getcwd();
//$this->location is the object reference
//Some objects like the hypership move, so we also need to know where there are.
//From the template, this object location is assigned to $location
//To get $this->location from template, use $CurrentPerso->location
if ($this->location->body) {
$smarty->assign("location", new GeoLocation($this->location->body->location));
} elseif ($this->location->ship) {
$smarty->assign("location", new GeoLocation($this->location->ship->location));
}
$smarty->assign("SCENE_URL", defined('SCENE_URL') ? SCENE_URL : '/' . SCENE_DIR);
lang_load('scenes.conf', $this->location->global);
$smarty->display($file);
$smarty->template_dir = $template_dir;
break;
case 'php':
message_die(HACK_ERROR, ".php scene files not allowed without review", '', __LINE__, __FILE__);
default:
message_die(GENERAL_ERROR, "Can't handle $ext extension for $file scene", 'GeoScene render error', __LINE__, __FILE__);
}
echo "\n\n";
}
}
/**
* Tries to get the scene file.
*
* It will tries to find in the scene directory a file with $code as name,
* and .tpl .png .gif .bmp .swf .html or .php as extension.
*
* @param string the location code (and filename)
* @return bool true if a scene file have been found and set ; otherwise, false.
*/
private function try_get_scene ($code) {
$file = SCENE_DIR . "/$code";
$extensions = array('tpl', 'png', 'jpg', 'gif', 'bmp', 'swf', 'html', 'php');
foreach ($extensions as $ext) {
if (file_exists("$file.$ext")) {
$this->sceneFile = "$file.$ext";
return true;
}
}
return false;
}
/**
* Reads scene templates and indexes information
*/
public static function index_scene_templates (&$global_templates, &$local_templates, &$updated) {
$global_templates = array();
$local_templates = array();
$updated = filemtime(SCENE_DIR);
if ($handle = opendir(SCENE_DIR)) {
while (false !== ($file = readdir($handle))) {
if (GeoScene::get_file_extension($file) == 'tpl') {
$template = file_get_contents(SCENE_DIR . '/' . $file, false, NULL, 0, 1024);
$location = self::get_template_location($template);
if ($location[1] == NULL) {
$global_templates[$location[0]] = $file;
} else {
$local_templates[$location[0]][$location[1]] = $file;
}
}
}
closedir($handle);
}
}
private static function get_template_location ($template) {
$location = array(NULL, NULL);
//Gets global location
$pos1 = strpos($template, "Global location: ") + 17;
$pos2 = strpos($template, "\n", $pos1);
$location[0] = trim(substr($template, $pos1, $pos2 - $pos1));
//Gets local location
$pos1 = strpos($template, "Local location: ");
if ($pos1 !== false) {
$pos1 += 16;
$pos2 = strpos($template, "\n", $pos1);
$location[1] = trim(substr($template, $pos1, $pos2 - $pos1));
}
return $location;
}
}
?>

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