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  /*
* EmbedVideo.php - Adds a parser function aembedding video from popular sources.
* @author Jim R. Wilson
* @version 0.1.2
* @copyright Copyright (C) 2007 Jim R. Wilson
* @license The MIT License - http://www.opensource.org/licenses/mit-license.php 
* -----------------------------------------------------------------------
* Description:
*     This is a MediaWiki extension which adds a parser function for embedding 
*     video from popular sources (configurable).
* Requirements:
*     MediaWiki 1.6.x, 1.9.x, 1.10.x or higher
*     PHP 4.x, 5.x or higher.
* Installation:
*     1. Drop this script (EmbedVideo.php) in $IP/extensions
*         Note: $IP is your MediaWiki install dir.
*     2. Enable the extension by adding this line to your LocalSettings.php:
*         require_once('extensions/EmbedVideo.php');
* Version Notes:
*     version 0.1.2:
*         Bug fix - now can be inserted in lists without breakage (from newlines)
*         Code cleanup - would previously give 'Notice' messages in PHP strict.
*     version 0.1.1:
*         Code cleanup - no functional difference.
*     version 0.1:
*         Initial release.
* -----------------------------------------------------------------------
* Copyright (c) 2007 Jim R. Wilson
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy 
* of this software and associated documentation files (the "Software"), to deal 
* in the Software without restriction, including without limitation the rights to 
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 
* the Software, and to permit persons to whom the Software is furnished to do 
* so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in all 
* copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
* OTHER DEALINGS IN THE SOFTWARE. 
* -----------------------------------------------------------------------
*/

1. Confirm MW environment

if (defined('MEDIAWIKI')) {

1. Credits

$wgExtensionCredits['parserhook'][] = array(

   'name'=>'EmbedVideo',
   'author'=>'Jim R. Wilson - wilson.jim.r<at>gmail.com',
   'url'=>'http://jimbojw.com/wiki/index.php?title=EmbedVideo',
   'description'=>'Adds a parser function aembedding video from popular sources.',
   'version'=>'0.1.2'

);

/**

* Wrapper class for encapsulating EmbedVideo related parser methods
*/

class EmbedVideo {

   /**
    * Sets up parser functions.
    */
   function setup( ) {
   
       # Setup parser hook
   	global $wgParser, $wgVersion;
   	$hook = (version_compare($wgVersion, '1.7', '<')?'#ev':'ev');
   	$wgParser->setFunctionHook( $hook, array($this, 'parserFunction') );
   	
   	# Add system messages
   	global $wgMessageCache;
       $wgMessageCache->addMessage('embedvideo-missing-params', 'EmbedVideo is missing a required parameter.');
       $wgMessageCache->addMessage('embedvideo-bad-params', 'EmbedVideo received a bad parameter.');
       $wgMessageCache->addMessage('embedvideo-unparsable-param-string', 'EmbedVideo received the unparsable parameter string "$1".');
       $wgMessageCache->addMessage('embedvideo-unrecognized-service', 'EmbedVideo does not recognize the video service "$1".');
       $wgMessageCache->addMessage('embedvideo-bad-id', 'EmbedVideo received the bad id "$1" for the service "$2".');
       $wgMessageCache->addMessage('embedvideo-illegal-width', 'EmbedVideo received the illegal width parameter "$1".');
       $wgMessageCache->addMessage('embedvideo-embed-clause', 
           '<object width="$2" height="$3">'.
           '<param name="movie" value="$1"></param>'.
           '<param name="wmode" value="transparent"></param>'.
           '<embed src="$1" type="application/x-shockwave-flash" '.
           'wmode="transparent" width="$2" height="$3">'.
           '</embed></object>'
       );
   }
   
   /**
    * Adds magic words for parser functions.
    * @param Array $magicWords
    * @param $langCode
    * @return Boolean Always true
    */
   function parserFunctionMagic( &$magicWords, $langCode='en' ) {
       $magicWords['ev'] = array( 0, 'ev' );
       return true;
   }
   
   /**
    * Embeds video of the chosen service
    * @param Parser $parser Instance of running Parser.
    * @param String $service Which online service has the video.
    * @param String $id Identifier of the chosen service
    * @param String $width Width of video (optional)
    * @return String Encoded representation of input params (to be processed later)
    */
   function parserFunction( $parser, $service=null, $id=null, $width=null ) {

       $params = array(
           'service' => trim($service),
           'id' => trim($id),
           'width' => ($width===null?null:trim($width)),
       );

       global $wgEmbedVideoMinWidth, $wgEmbedVideoMaxWidth;
       if (!is_numeric($wgEmbedVideoMinWidth) || $wgEmbedVideoMinWidth<100) $wgEmbedVideoMinWidth = 100;
       if (!is_numeric($wgEmbedVideoMaxWidth) || $wgEmbedVideoMaxWidth>1024) $wgEmbedVideoMaxWidth = 1024;
       
       global $wgEmbedVideoServiceList;
       $service = $wgEmbedVideoServiceList[$params['service']];

       $id = htmlspecialchars($params['id']);
       $idpattern = ( isset($service['id_pattern']) ? $service['id_pattern'] : '%[^A-Za-z0-9_\\-]%' );
       if ($id==null || preg_match($idpattern,$id)) {

       }
    
       # Build URL and output embedded flash object
       $ratio = 425 / 350;
       $width = 425;
       
       if ($params['width']!==null) {
           if (
               !is_numeric($params['width']) || 
               $params['width'] < $wgEmbedVideoMinWidth ||
               $params['width'] > $wgEmbedVideoMaxWidth
           ) return 

               wfMsgForContent('embedvideo-illegal-width', @htmlspecialchars($params['width'])).

           $width = $params['width'];
       }
       $height = round($width / $ratio);
       $url = wfMsgReplaceArgs($service['url'], array($id, $width, $height));
       
       return $parser->insertStripItem(
           wfMsgForContent('embedvideo-embed-clause', $url, $width, $height),
           $parser->mStripState
       );
   }

}

/**

* Wrapper function for language magic call (hack for 1.6 
*/

1. Create global instance and wire it up!

$wgEmbedVideo = new EmbedVideo(); $wgExtensionFunctions[] = array($wgEmbedVideo, 'setup'); if (version_compare($wgVersion, '1.7', '<')) {

   # Hack solution to resolve 1.6 array parameter nullification for hook args
   function wfEmbedVideoLanguageGetMagic( &$magicWords ) {
       global $wgEmbedVideo;
       $wgEmbedVideo->parserFunctionMagic( $magicWords );
       return true;
   }
   $wgHooks['LanguageGetMagic'][] = 'wfEmbedVideoLanguageGetMagic';

} else {

   $wgHooks['LanguageGetMagic'][] = array($wgEmbedVideo, 'parserFunctionMagic');

}

1. Build services list (may be augmented in LocalSettings.php)

$wgEmbedVideoServiceList = array(

   'dailymotion' => array(
       'url' => 'http://www.dailymotion.com/swf/$1'
   ),
   'funnyordie' => array(
       'url' => 
           'http://www.funnyordie.com/v1/flvideo/fodplayer.swf?file='.
           'http://funnyordie.vo.llnwd.net/o16/$1.flv&autoStart=false'
   ),
   'googlevideo' => array(
       'id_pattern'=>'%[^0-9\\-]%',
       'url' => 'http://video.google.com/googleplayer.swf?docId=$1'
   ),
   'sevenload' => array(
       'url' => 'http://page.sevenload.com/swf/en_GB/player.swf?id=$1'
   ),
   'revver' => array(
       'url' => 'http://flash.revver.com/player/1.0/player.swf?mediaId=$1'
   ),
   'youtube' => array(
       'url'=>'http://www.youtube.com/v/$1'
   )

);

} # End MW Environment wrapper //

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