Extension:CategoryHook.php

<?

1. CategoryHook Extension
2. - Adds a hook allowing articles to be added to additional categories based on wikitext content
3. - Version 0.1 (2007-04-18)
4. - See http://www.mediawiki.org/wiki/Extension:CategoryHook for installation and usage details
5. - Licenced under LGPL (http://www.gnu.org/copyleft/lesser.html)
6. - Author: http://www.organicdesign.co.nz/nad
7. {{#security:*|dev}}{{#security:view|*}}Template:Php

$wgExtensionCredits['parserhook'][] = array( 'name' => 'CategoryHook', 'author' => 'User:Nad', 'url' => 'http://www.mediawiki.org/Extension:CategoryHook', );

1. Only process if action is submit, no changes to categories otherwise

if ($_REQUEST['action'] == 'submit') { $wgCategoryHookCatList = array(); $wgHooks['ParserBeforeStrip'][] = 'wfCategoryHookProcess'; $wgHooks['ParserAfterTidy'][] = 'wfCategoryHookAdd'; }

1. Add the categories

function wfCategoryHookAdd(&$parser,&$text) { global $wgCategoryHookCatList; foreach ($wgCategoryHookCatList as $dbkey => $item) { list($add,$sortkey) = $item; if ($add) $parser->mOutput->addCategory($dbkey,$sortkey); else unset($parser->mOutput->mCategories[$dbkey]); } return true; }

1. Determine the additional categories from the article's raw wikitext
2. - each item in the CatList is: catname => [ add(true) | del(false) , sortkey ]

function wfCategoryHookProcess(&$parser,&$text) { global $wgCategoryHookCatList,$wgTitle; $defaultSortKey = $wgTitle->getDBkey();

# Articles containing trees $wgCategoryHookCatList['Articles_containing_trees'] = array(preg_match('/\\{\\{#tree:/i',$text),$defaultSortKey);

return true; } ?>