require_once ("$IP/extensions/unity.php");

<?php
/*
 * Embed a Unity 3D Game file.
 *
 * To activate this extension, add the following into your LocalSettings.php file:
 * require_once('$IP/extensions/unity.php');
 *
 */

$wgExtensionCredits['parserhook'][] = array(
        'name' => 'Unity Embed',
        'author' => 'Jon Hunter',
        'version'=>'1.0',
        'description' => 'Allows the display of unity games on a wiki page using the <code>&lt;unity&gt;</code> tag',
        'url' => 'https://www.mediawiki.org/wiki/Extension:UnityEmbed',
);

$wgExtensionFunctions[] = "wfUnityExtension";

class Unity{
    /* Constructor */
    function Unity( $input ) {
        Unity::parseInput( $input ); // Parse the input
        Unity::genCode(); // Generate the final code
    }

    function parseInput( $input ) {
        for($pos=0; $pos<strlen($input); $pos++) { // go through all arguments
            if($input{$pos}=='=') { // separator between command
                    $this->instr = $this->tmp;
                    $this->tmp = '';
            }
            else if($input{$pos}=='|') {// separator between arguments
                Unity::setValue();
                $this->tmp='';
            }
            else{
                $this->tmp .= $input{$pos};
            }
        }
        
        if($this->tmp!='') Unity::setValue(); // Deal with the rest of the input string
    }

    function setValue() {
        if($this->instr=='file'|| // Whitelist of flash commands. Anything else but flash commands is ignored.
                $this->instr=='width'||
                $this->instr=='height') {
            $this->{$this->instr} = $this->tmp;
        }
    }

    function genCode(){
        $title = wfLocalFile(Title::newFromText(trim($this->file), NS_FILE));
        if($title){
            $url = $title->getFullURL();
            $this->code = '<object id="UnityObject" classid="clsid:444785F1-DE89-4295-863A-D46C3A781394" width="'.$this->width.'" height="'.$this->height.'" codebase="http://webplayer.unity3d.com/download_webplayer/UnityWebPlayer.cab#version=2,0,0,0"><param name="'.$url.'" value="WebPlayer.unity3d" /><embed id="UnityEmbed" src="'.$url.'" width="'.$this->width.'" height="'.$this->height.'" type="application/vnd.unity" pluginspage="http://www.unity3d.com/unity-web-player-2.x" /></object><br>';
            return $this->code;
        }
    }
}

function wfUnityExtension() {
    global $wgParser;
    $wgParser->setHook( "unity", "renderUnity" );
}

function renderUnity( $input ) {
    $game = new Unity( $input );//creates a unity object
    return $game->code; // send the final code to the wiki
}