includes/specials/SpecialChangeContentModel.php

   1 <?php
   2
   3 class SpecialChangeContentModel extends FormSpecialPage {
   4
   5         public function __construct() {
   6                 parent::__construct( 'ChangeContentModel', 'editcontentmodel' );
   7         }
   8
   9         /**
  10          * @var Title|null
  11          */
  12         private $title;
  13
  14         /**
  15          * @var Revision|bool|null
  16          *
  17          * A Revision object, false if no revision exists, null if not loaded yet
  18          */
  19         private $oldRevision;
  20
  21         protected function setParameter( $par ) {
  22                 $par = $this->getRequest()->getVal( 'pagetitle', $par );
  23                 $title = Title::newFromText( $par );
  24                 if ( $title ) {
  25                         $this->title = $title;
  26                         $this->par = $title->getPrefixedText();
  27                 } else {
  28                         $this->par = '';
  29                 }
  30         }
  31
  32         protected function getDisplayFormat() {
  33                 return 'ooui';
  34         }
  35
  36         protected function alterForm( HTMLForm $form ) {
  37                 if ( !$this->title ) {
  38                         $form->setMethod( 'GET' );
  39                 }
  40         }
  41
  42         public function validateTitle( $title ) {
  43                 if ( !$title ) {
  44                         // No form input yet
  45                         return true;
  46                 }
  47
  48                 // Already validated by HTMLForm, but if not, throw
  49                 // and exception instead of a fatal
  50                 $titleObj = Title::newFromTextThrow( $title );
  51
  52                 $this->oldRevision = Revision::newFromTitle( $titleObj ) ?: false;
  53
  54                 if ( $this->oldRevision ) {
  55                         $oldContent = $this->oldRevision->getContent();
  56                         if ( !$oldContent->getContentHandler()->supportsDirectEditing() ) {
  57                                 return $this->msg( 'changecontentmodel-nodirectediting' )
  58                                         ->params( ContentHandler::getLocalizedName( $oldContent->getModel() ) )
  59                                         ->escaped();
  60                         }
  61                 }
  62
  63                 return true;
  64         }
  65
  66         protected function getFormFields() {
  67                 $that = $this;
  68                 $fields = array(
  69                         'pagetitle' => array(
  70                                 'type' => 'title',
  71                                 'creatable' => true,
  72                                 'name' => 'pagetitle',
  73                                 'default' => $this->par,
  74                                 'label-message' => 'changecontentmodel-title-label',
  75                                 'validation-callback' => array( $this, 'validateTitle' ),
  76                         ),
  77                 );
  78                 if ( $this->title ) {
  79                         $fields['pagetitle']['readonly'] = true;
  80                         $fields += array(
  81                                 'model' => array(
  82                                         'type' => 'select',
  83                                         'name' => 'model',
  84                                         'options' => $this->getOptionsForTitle( $this->title ),
  85                                         'label-message' => 'changecontentmodel-model-label'
  86                                 ),
  87                                 'reason' => array(
  88                                         'type' => 'text',
  89                                         'name' => 'reason',
  90                                         'validation-callback' => function( $reason ) use ( $that ) {
  91                                                 $match = EditPage::matchSummarySpamRegex( $reason );
  92                                                 if ( $match ) {
  93                                                         return $that->msg( 'spamprotectionmatch', $match )->parse();
  94                                                 }
  95
  96                                                 return true;
  97                                         },
  98                                         'label-message' => 'changecontentmodel-reason-label',
  99                                 ),
 100                         );
 101                 }
 102
 103                 return $fields;
 104         }
 105
 106         private function getOptionsForTitle( Title $title = null ) {
 107                 $models = ContentHandler::getContentModels();
 108                 $options = array();
 109                 foreach ( $models as $model ) {
 110                         $handler = ContentHandler::getForModelID( $model );
 111                         if ( !$handler->supportsDirectEditing() ) {
 112                                 continue;
 113                         }
 114                         if ( $title ) {
 115                                 if ( $title->getContentModel() === $model ) {
 116                                         continue;
 117                                 }
 118                                 if ( !$handler->canBeUsedOn( $title ) ) {
 119                                         continue;
 120                                 }
 121                         }
 122                         $options[ContentHandler::getLocalizedName( $model )] = $model;
 123                 }
 124
 125                 return $options;
 126         }
 127
 128         public function onSubmit( array $data ) {
 129                 global $wgContLang;
 130
 131                 if ( $data['pagetitle'] === '' ) {
 132                         // Initial form view of special page, pass
 133                         return false;
 134                 }
 135
 136                 // At this point, it has to be a POST request. This is enforced by HTMLForm,
 137                 // but lets be safe verify that.
 138                 if ( !$this->getRequest()->wasPosted() ) {
 139                         throw new RuntimeException( "Form submission was not POSTed" );
 140                 }
 141
 142                 $this->title = Title::newFromText( $data['pagetitle' ] );
 143                 $user = $this->getUser();
 144                 // Check permissions and make sure the user has permission to edit the specific page
 145                 $errors = $this->title->getUserPermissionsErrors( 'editcontentmodel', $user );
 146                 $errors = wfMergeErrorArrays( $errors, $this->title->getUserPermissionsErrors( 'edit', $user ) );
 147                 if ( $errors ) {
 148                         $out = $this->getOutput();
 149                         $wikitext = $out->formatPermissionsErrorMessage( $errors );
 150                         // Hack to get our wikitext parsed
 151                         return Status::newFatal( new RawMessage( '$1', array( $wikitext ) ) );
 152                 }
 153
 154                 $page = WikiPage::factory( $this->title );
 155                 if ( $this->oldRevision === null ) {
 156                         $this->oldRevision = $page->getRevision() ?: false;
 157                 }
 158                 $oldModel = $this->title->getContentModel();
 159                 if ( $this->oldRevision ) {
 160                         $oldContent = $this->oldRevision->getContent();
 161                         try {
 162                                 $newContent = ContentHandler::makeContent(
 163                                         $oldContent->getNativeData(), $this->title, $data['model']
 164                                 );
 165                         } catch ( MWException $e ) {
 166                                 return Status::newFatal(
 167                                         $this->msg( 'changecontentmodel-cannot-convert' )
 168                                                 ->params(
 169                                                         $this->title->getPrefixedText(),
 170                                                         ContentHandler::getLocalizedName( $data['model'] )
 171                                                 )
 172                                 );
 173                         }
 174                 } else {
 175                         // Page doesn't exist, create an empty content object
 176                         $newContent = ContentHandler::getForModelID( $data['model'] )->makeEmptyContent();
 177                 }
 178                 $flags = $this->oldRevision ? EDIT_UPDATE : EDIT_NEW;
 179                 if ( $user->isAllowed( 'bot' ) ) {
 180                         $flags |= EDIT_FORCE_BOT;
 181                 }
 182
 183                 $log = new ManualLogEntry( 'contentmodel', 'change' );
 184                 $log->setPerformer( $user );
 185                 $log->setTarget( $this->title );
 186                 $log->setComment( $data['reason'] );
 187                 $log->setParameters( array(
 188                         '4::oldmodel' => $oldModel,
 189                         '5::newmodel' => $data['model']
 190                 ) );
 191
 192                 $formatter = LogFormatter::newFromEntry( $log );
 193                 $formatter->setContext( RequestContext::newExtraneousContext( $this->title ) );
 194                 $reason = $formatter->getPlainActionText();
 195                 if ( $data['reason'] !== '' ) {
 196                         $reason .= $this->msg( 'colon-separator' )->inContentLanguage()->text() . $data['reason'];
 197                 }
 198                 # Truncate for whole multibyte characters.
 199                 $reason = $wgContLang->truncate( $reason, 255 );
 200
 201                 $status = $page->doEditContent(
 202                         $newContent,
 203                         $reason,
 204                         $flags,
 205                         $this->oldRevision ? $this->oldRevision->getId() : false,
 206                         $user
 207                 );
 208                 if ( !$status->isOK() ) {
 209                         return $status;
 210                 }
 211
 212                 $logid = $log->insert();
 213                 $log->publish( $logid );
 214
 215                 return $status;
 216         }
 217
 218         public function onSuccess() {
 219                 $out = $this->getOutput();
 220                 $out->setPageTitle( $this->msg( 'changecontentmodel-success-title' ) );
 221                 $out->addWikiMsg( 'changecontentmodel-success-text', $this->title );
 222         }
 223 }