- function show()
- {
- global $wgOut, $wgUser, $wgLang;
- global $ip, $wpBlockAddress, $wpBlockReason;
-
- $wgOut->setPagetitle( wfMsg( "booksources" ) );
- $wgOut->addWikiText( wfMsg( "booksourcetext" ) );
-
- # If ISBN is blank, just show a list of links to the
- # home page of the various book sites. Otherwise, show
- # a list of links directly to the book.
-
- $s = "<ul>\n";
- $bs = $wgLang->getBookstoreList() ;
- $bsn = array_keys ( $bs ) ;
- foreach ( $bsn as $name ) {
- $adr = $bs[$name] ;
- if ( ! $this->mIsbn ) {
- $adr = explode ( ":" , $adr , 2 ) ;
- $adr = explode ( "/" , $adr[1] ) ;
- $a = "" ;
- while ( $a == "" ) $a = array_shift ( $adr ) ;
- $adr = "http://".$a ;
- } else {
- $adr = str_replace ( "$1" , $this->mIsbn , $adr ) ;
- }
- $s .= "<li><a href=\"{$adr}\">{$name}</a></li>\n" ;
- }
- $s .= "</ul>\n";
-
- $wgOut->addHTML( $s );
+ /**
+ * 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->addWikiText( wfMsgNoTrans( 'booksources-text' ) );
+ $wgOut->addHtml( '<ul>' );
+ $items = $wgContLang->getBookstoreList();
+ foreach( $items as $label => $url )
+ $wgOut->addHtml( $this->makeListItem( $label, $url ) );
+ $wgOut->addHtml( '</ul>' );
+ return true;
+ }
+
+ /**
+ * Format a book source list item
+ *
+ * @param $label Book source label
+ * @param $url Book source URL
+ * @return string
+ */
+ private function makeListItem( $label, $url ) {
+ $url = str_replace( '$1', $this->isbn, $url );
+ return '<li><a href="' . htmlspecialchars( $url ) . '">' . htmlspecialchars( $label ) . '</a></li>';