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story.php
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story.php
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<?php
/*
* Zed
* (c) 2010, Dereckson, some rights reserved
* Released under BSD license
*
* Story
*/
require_once('section.php');
/*
* @package Zed
* @subpackage story
*/
class Story {
/*
* @var string the file path
*/
public $file;
/*
* @var string the story title
*/
public $title;
/*
* @var Array an array of StorySection elements
*/
public $sections = array();
/*
* @var SimpleXMLElement the SimpleXML parser
*/
private $xml;
/*
* @var string the index of start section in sections array
*/
private $startSection = null;
/*
* @var Array an array of StorySection elements, indexed by location
*/
private $sectionsByLocation = array();
function __construct ($file) {
//Opens .xml
if (!file_exists($file)) {
message_die(GENERAL_ERROR, "$file not found.", "Story loading error");
}
$this->file = $file;
$this->parse();
}
/*
* Gets start section
* @return StorySection the section where the story starts, or null if not defined
*/
function get_start_section () {
return ($this->startSection != null) ? $this->sections[$this->startSection] : null;
}
/*
* Gets section from local location
* @return StorySection the default section at this location, or null if not defined
*/
function get_section_from_location ($location) {
return array_key_exists($location, $this->sectionsByLocation) ? $this->sectionsByLocation[$location] : null;
}
/*
* Parses XML file
*/
function parse () {
//Parses it
$this->xml = simplexml_load_file($this->file);
$this->title = (string)$this->xml->title;
foreach ($this->xml->section as $section) {
//Gets section
$section = StorySection::from_xml($section, $this);
//Have we a start section?
if ($section->start) {
//Ensures we've only one start section
if ($this->startSection != null) {
message_die(GENERAL_ERROR, "Two sections have start=\"true\": $section->id and $this->startSection.", "Story error");
}
$this->startSection = $section->id;
}
//By location
if ($section->location_local) {
$this->sectionsByLocation[$section->location_local] = $section;
}
//Adds to sections array
$this->sections[$section->id] = $section;
}
}
}
?>

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