DumpNamespaceFilter.php

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<?php
class DumpNamespaceFilter extends DumpFilter {
    public $invert = false;
 
    public $namespaces = [];
 
    public function __construct( &$sink, $param ) {
        parent::__construct( $sink );
 
        $constants = [
            "NS_MAIN"           => NS_MAIN,
            "NS_TALK"           => NS_TALK,
            "NS_USER"           => NS_USER,
            "NS_USER_TALK"      => NS_USER_TALK,
            "NS_PROJECT"        => NS_PROJECT,
            "NS_PROJECT_TALK"   => NS_PROJECT_TALK,
            "NS_FILE"           => NS_FILE,
            "NS_FILE_TALK"      => NS_FILE_TALK,
            "NS_MEDIAWIKI"      => NS_MEDIAWIKI,
            "NS_MEDIAWIKI_TALK" => NS_MEDIAWIKI_TALK,
            "NS_TEMPLATE"       => NS_TEMPLATE,
            "NS_TEMPLATE_TALK"  => NS_TEMPLATE_TALK,
            "NS_HELP"           => NS_HELP,
            "NS_HELP_TALK"      => NS_HELP_TALK,
            "NS_CATEGORY"       => NS_CATEGORY,
            "NS_CATEGORY_TALK"  => NS_CATEGORY_TALK ];
 
        if ( $param[0] == '!' ) {
            $this->invert = true;
            $param = substr( $param, 1 );
        }
 
        foreach ( explode( ',', $param ) as $key ) {
            $key = trim( $key );
            if ( isset( $constants[$key] ) ) {
                $ns = $constants[$key];
                $this->namespaces[$ns] = true;
            } elseif ( is_numeric( $key ) ) {
                $ns = intval( $key );
                $this->namespaces[$ns] = true;
            } else {
                throw new InvalidArgumentException( "Unrecognized namespace key '$key'\n" );
            }
        }
    }
 
    protected function pass( $page ) {
        $match = isset( $this->namespaces[$page->page_namespace] );
        return $this->invert xor $match;
    }
}