TagLogFormatter.php

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<?php
class TagLogFormatter extends LogFormatter {
 
    protected function getMessageParameters() {
        $params = parent::getMessageParameters();
 
        $isRevLink = !empty( $params[3] );
        if ( $isRevLink ) {
            $id = $params[3];
            $target = $this->entry->getTarget();
            $query = [
                'oldid' => $id,
                'diff' => 'prev'
            ];
        } else {
            $id = $params[4];
            $target = SpecialPage::getTitleValueFor( 'Log' );
            $query = [
                'logid' => $id,
            ];
        }
 
        $formattedNumber = $this->context->getLanguage()->formatNumNoSeparators( $id );
        if ( $this->plaintext ) {
            $link = $formattedNumber;
        } elseif ( !$isRevLink || $target->exists() ) {
            $link = $this->getLinkRenderer()->makeKnownLink(
                $target, $formattedNumber, [], $query );
        } else {
            $link = htmlspecialchars( $formattedNumber );
        }
 
        if ( $isRevLink ) {
            $params[3] = Message::rawParam( $link );
        } else {
            $params[4] = Message::rawParam( $link );
        }
 
        return $params;
    }
 
    protected function getMessageKey() {
        $key = parent::getMessageKey();
        $params = $this->getMessageParameters();
 
        $add = ( isset( $params[6] ) && isset( $params[6]['num'] ) && $params[6]['num'] );
        $remove = ( isset( $params[8] ) && isset( $params[8]['num'] ) && $params[8]['num'] );
        $key .= ( $remove ? ( $add ? '' : '-remove' ) : '-add' );
 
        if ( isset( $params[3] ) && $params[3] ) {
            // Messages: logentry-tag-update-add-revision, logentry-tag-update-remove-revision,
            // logentry-tag-update-revision
            $key .= '-revision';
        } else {
            // Messages: logentry-tag-update-add-logentry, logentry-tag-update-remove-logentry,
            // logentry-tag-update-logentry
            $key .= '-logentry';
        }
 
        return $key;
    }
 
}