CreateBox.php

<?php
/*

 CreateBox v1.6 -- Specialized Inputbox for page creation

 Author: Ross McClure
 http://www.mediawiki.org/wiki/User:Algorithm

 Inputbox written by Erik Moeller <moeller@scireview.de>

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along
 with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 http://www.gnu.org/copyleft/gpl.html

 To install, add following to LocalSettings.php
   require_once("extensions/CreateBox/CreateBox.php");
*/

if ( !defined( 'MEDIAWIKI' ) ) {
  die( "This is not a valid entry point.\n" );
}

$wgHooks['ParserFirstCallInit'][] = 'wfCreateBox';

$wgHooks['UnknownAction'][] = 'actionCreate';
$wgExtensionCredits['parserhook'][] = array(
  'path' => __FILE__,
  'name' => 'CreateBox',
  'author' => 'Ross McClure',
  'version' => '1.6',
  'url' => 'https://www.mediawiki.org/wiki/Extension:CreateBox',
  'descriptionmsg' => 'createbox-desc',
);

$dir = dirname( __FILE__ ) . '/';
$wgExtensionMessagesFiles['CreateBox'] = $dir . 'CreateBox.i18n.php';
$wgMessagesDirs['CreateBox'] = $dir . '/i18n';

function wfCreateBox( $parser ) {
  $parser->setHook( 'createbox', 'acMakeBox' );
  return true;
}

function actionCreate( $action, $article ) {
  if( $action != 'create' ) {
    return true;
  }

  global $wgRequest;
  $prefix = $wgRequest->getVal( 'prefix' );
  $text = $wgRequest->getVal( 'title' );
  if( $prefix && strpos( $text, $prefix ) !== 0 ) {
    $title = Title::newFromText( $prefix . $text );
    if( is_null( $title ) ) {
      global $wgTitle;
      $wgTitle = SpecialPage::getTitleFor( 'Badtitle' );
      throw new ErrorPageError( 'badtitle', 'badtitletext' );
    } elseif( $title->getArticleID() == 0 ) {
      acRedirect( $title, 'edit' );
    } else {
      acRedirect( $title, 'create' );
    }
  } elseif( $wgRequest->getVal( 'section' ) == 'new' || $article->getID() == 0 ) {
    acRedirect( $article->getTitle(), 'edit' );
  } else {
    global $wgOut;
    $text = $article->getTitle()->getPrefixedText();
    $wgOut->setPageTitle( $text );
    $wgOut->setHTMLTitle( wfMsg( 'pagetitle', $text . ' - ' . wfMsg( 'createbox-create' ) ) );
    $wgOut->addWikiMsg( 'createbox-exists' );
  }
  return false;
}

function acGetOption( $input, $name, $value = null ) {
  if( preg_match( "/^\s*$name\s*=\s*(.*)/mi", $input, $matches ) ) {
    if( is_int( $value ) ) {
      return intval( $matches[1] );
    } else {
      return htmlspecialchars( $matches[1] );
    }
  }
  return $value;
}

function acMakeBox( $input, $argv, $parser ) {
  global $wgRequest, $wgScript;
  if( $wgRequest->getVal( 'action' ) == 'create' ) {
    $prefix = acGetOption( $input, 'prefix' );
    $preload = acGetOption( $input, 'preload' );
    $editintro = acGetOption( $input, 'editintro' ); 
    $text = $parser->getTitle()->getPrefixedText();
    if( $prefix && strpos( $text, $prefix ) === 0 ) {
      $text = substr( $text, strlen( $prefix ) );
    }
  } else {
    $prefix = acGetOption( $input, 'prefix' );
    $preload = acGetOption( $input, 'preload' );
    $editintro = acGetOption( $input, 'editintro' );
    $text = acGetOption( $input, 'default' );
  }
  $submit = htmlspecialchars( $wgScript );
  $width = acGetOption( $input, 'width', 0 );
  $align = acGetOption( $input, 'align', 'center' );
  $br = ( ( acGetOption( $input, 'break', 'no' ) == 'no' ) ? '' : '<br />' );
  $label = acGetOption( $input, 'buttonlabel', wfMsgHtml( 'createbox-create' ) );
  $output = <<<ENDFORM
<div class="createbox" align="{$align}">
<form name="createbox" action="{$submit}" method="get" class="createboxForm">
<input type='hidden' name="action" value="create">
<input type="hidden" name="prefix" value="{$prefix}" />
<input type="hidden" name="preload" value="{$preload}" />
<input type="hidden" name="editintro" value="{$editintro}" />
<input class="createboxInput" name="title" type="text" value="{$text}" size="{$width}"/>{$br}
<input type='submit' name="create" class="createboxButton" value="{$label}"/>
</form></div>
ENDFORM;
  return $parser->replaceVariables( $output );
}

function acRedirect( $title, $action ) {
  global $wgRequest, $wgOut;
  $query = "action={$action}&prefix=" . $wgRequest->getVal( 'prefix' ) .
    '&preload=' . $wgRequest->getVal( 'preload' ) .
    '&editintro=' . $wgRequest->getVal( 'editintro' ) .
    '&section=' . $wgRequest->getVal( 'section' );
  $wgOut->setSquidMaxage( 1200 );
  $wgOut->redirect( $title->getFullURL( $query ), '301' );
}