* @todo Validate ISBNs using the standard check-digit method
*/
class SpecialBookSources extends SpecialPage {
/**
* ISBN passed to the page, if any
*/
private $isbn = '';
/**
* Constructor
*/
public function __construct() {
parent::__construct( 'Booksources' );
}
/**
* Show the special page
*
* @param $isbn ISBN passed as a subpage parameter
*/
public function execute( $isbn ) {
global $wgOut, $wgRequest;
$this->setHeaders();
$this->isbn = $this->cleanIsbn( $isbn ? $isbn : $wgRequest->getText( 'isbn' ) );
$wgOut->addWikiMsg( 'booksources-summary' );
$wgOut->addHtml( $this->makeForm() );
if( strlen( $this->isbn ) > 0 )
$this->showList();
}
/**
* Trim ISBN and remove characters which aren't required
*
* @param $isbn Unclean ISBN
* @return string
*/
private function cleanIsbn( $isbn ) {
return trim( preg_replace( '![^0-9X]!', '', $isbn ) );
}
/**
* Generate a form to allow users to enter an ISBN
*
* @return string
*/
private function makeForm() {
global $wgScript;
$title = self::getTitleFor( 'Booksources' );
$form = '';
return $form;
}
/**
* Determine where to get the list of book sources from,
* format and output them
*
* @return string
*/
private function showList() {
global $wgOut, $wgContLang;
# Hook to allow extensions to insert additional HTML,
# e.g. for API-interacting plugins and so on
wfRunHooks( 'BookInformation', array( $this->isbn, &$wgOut ) );
# Check for a local page such as Project:Book_sources and use that if available
$title = Title::makeTitleSafe( NS_PROJECT, wfMsgForContent( 'booksources' ) ); # Show list in content language
if( is_object( $title ) && $title->exists() ) {
$rev = Revision::newFromTitle( $title );
$wgOut->addWikiText( str_replace( 'MAGICNUMBER', $this->isbn, $rev->getText() ) );
return true;
}
# Fall back to the defaults given in the language file
$wgOut->addWikiMsg( 'booksources-text' );
$wgOut->addHtml( '