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         public function doesWrites() {
  10                 return true;
  11         }
  12
  13         /**
  14          * @var Title|null
  15          */
  16         private $title;
  17
  18         /**
  19          * @var Revision|bool|null
  20          *
  21          * A Revision object, false if no revision exists, null if not loaded yet
  22          */
  23         private $oldRevision;
  24
  25         protected function setParameter( $par ) {
  26                 $par = $this->getRequest()->getVal( 'pagetitle', $par );
  27                 $title = Title::newFromText( $par );
  28                 if ( $title ) {
  29                         $this->title = $title;
  30                         $this->par = $title->getPrefixedText();
  31                 } else {
  32                         $this->par = '';
  33                 }
  34         }
  35
  36         protected function postText() {
  37                 $text = '';
  38                 if ( $this->title ) {
  39                         $contentModelLogPage = new LogPage( 'contentmodel' );
  40                         $text = Xml::element( 'h2', null, $contentModelLogPage->getName()->text() );
  41                         $out = '';
  42                         LogEventsList::showLogExtract( $out, 'contentmodel', $this->title );
  43                         $text .= $out;
  44                 }
  45                 return $text;
  46         }
  47
  48         protected function getDisplayFormat() {
  49                 return 'ooui';
  50         }
  51
  52         protected function alterForm( HTMLForm $form ) {
  53                 if ( !$this->title ) {
  54                         $form->setMethod( 'GET' );
  55                 }
  56
  57                 $this->addHelpLink( 'Help:ChangeContentModel' );
  58
  59                 // T120576
  60                 $form->setSubmitTextMsg( 'changecontentmodel-submit' );
  61         }
  62
  63         public function validateTitle( $title ) {
  64                 if ( !$title ) {
  65                         // No form input yet
  66                         return true;
  67                 }
  68
  69                 // Already validated by HTMLForm, but if not, throw
  70                 // and exception instead of a fatal
  71                 $titleObj = Title::newFromTextThrow( $title );
  72
  73                 $this->oldRevision = Revision::newFromTitle( $titleObj ) ?: false;
  74
  75                 if ( $this->oldRevision ) {
  76                         $oldContent = $this->oldRevision->getContent();
  77                         if ( !$oldContent->getContentHandler()->supportsDirectEditing() ) {
  78                                 return $this->msg( 'changecontentmodel-nodirectediting' )
  79                                         ->params( ContentHandler::getLocalizedName( $oldContent->getModel() ) )
  80                                         ->escaped();
  81                         }
  82                 }
  83
  84                 return true;
  85         }
  86
  87         protected function getFormFields() {
  88                 $fields = [
  89                         'pagetitle' => [
  90                                 'type' => 'title',
  91                                 'creatable' => true,
  92                                 'name' => 'pagetitle',
  93                                 'default' => $this->par,
  94                                 'label-message' => 'changecontentmodel-title-label',
  95                                 'validation-callback' => [ $this, 'validateTitle' ],
  96                         ],
  97                 ];
  98                 if ( $this->title ) {
  99                         $options = $this->getOptionsForTitle( $this->title );
 100                         if ( empty( $options ) ) {
 101                                 throw new ErrorPageError(
 102                                         'changecontentmodel-emptymodels-title',
 103                                         'changecontentmodel-emptymodels-text',
 104                                         $this->title->getPrefixedText()
 105                                 );
 106                         }
 107                         $fields['pagetitle']['readonly'] = true;
 108                         $fields += [
 109                                 'model' => [
 110                                         'type' => 'select',
 111                                         'name' => 'model',
 112                                         'options' => $options,
 113                                         'label-message' => 'changecontentmodel-model-label'
 114                                 ],
 115                                 'reason' => [
 116                                         'type' => 'text',
 117                                         'name' => 'reason',
 118                                         'validation-callback' => function ( $reason ) {
 119                                                 $match = EditPage::matchSummarySpamRegex( $reason );
 120                                                 if ( $match ) {
 121                                                         return $this->msg( 'spamprotectionmatch', $match )->parse();
 122                                                 }
 123
 124                                                 return true;
 125                                         },
 126                                         'label-message' => 'changecontentmodel-reason-label',
 127                                 ],
 128                         ];
 129                 }
 130
 131                 return $fields;
 132         }
 133
 134         private function getOptionsForTitle( Title $title = null ) {
 135                 $models = ContentHandler::getContentModels();
 136                 $options = [];
 137                 foreach ( $models as $model ) {
 138                         $handler = ContentHandler::getForModelID( $model );
 139                         if ( !$handler->supportsDirectEditing() ) {
 140                                 continue;
 141                         }
 142                         if ( $title ) {
 143                                 if ( $title->getContentModel() === $model ) {
 144                                         continue;
 145                                 }
 146                                 if ( !$handler->canBeUsedOn( $title ) ) {
 147                                         continue;
 148                                 }
 149                         }
 150                         $options[ContentHandler::getLocalizedName( $model )] = $model;
 151                 }
 152
 153                 return $options;
 154         }
 155
 156         public function onSubmit( array $data ) {
 157                 if ( $data['pagetitle'] === '' ) {
 158                         // Initial form view of special page, pass
 159                         return false;
 160                 }
 161
 162                 // At this point, it has to be a POST request. This is enforced by HTMLForm,
 163                 // but lets be safe verify that.
 164                 if ( !$this->getRequest()->wasPosted() ) {
 165                         throw new RuntimeException( "Form submission was not POSTed" );
 166                 }
 167
 168                 $this->title = Title::newFromText( $data['pagetitle'] );
 169                 $titleWithNewContentModel = clone $this->title;
 170                 $titleWithNewContentModel->setContentModel( $data['model'] );
 171                 $user = $this->getUser();
 172                 // Check permissions and make sure the user has permission to:
 173                 $errors = wfMergeErrorArrays(
 174                         // edit the contentmodel of the page
 175                         $this->title->getUserPermissionsErrors( 'editcontentmodel', $user ),
 176                         // edit the page under the old content model
 177                         $this->title->getUserPermissionsErrors( 'edit', $user ),
 178                         // edit the contentmodel under the new content model
 179                         $titleWithNewContentModel->getUserPermissionsErrors( 'editcontentmodel', $user ),
 180                         // edit the page under the new content model
 181                         $titleWithNewContentModel->getUserPermissionsErrors( 'edit', $user )
 182                 );
 183                 if ( $errors ) {
 184                         $out = $this->getOutput();
 185                         $wikitext = $out->formatPermissionsErrorMessage( $errors );
 186                         // Hack to get our wikitext parsed
 187                         return Status::newFatal( new RawMessage( '$1', [ $wikitext ] ) );
 188                 }
 189
 190                 $page = WikiPage::factory( $this->title );
 191                 if ( $this->oldRevision === null ) {
 192                         $this->oldRevision = $page->getRevision() ?: false;
 193                 }
 194                 $oldModel = $this->title->getContentModel();
 195                 if ( $this->oldRevision ) {
 196                         $oldContent = $this->oldRevision->getContent();
 197                         try {
 198                                 $newContent = ContentHandler::makeContent(
 199                                         $oldContent->serialize(), $this->title, $data['model']
 200                                 );
 201                         } catch ( MWException $e ) {
 202                                 return Status::newFatal(
 203                                         $this->msg( 'changecontentmodel-cannot-convert' )
 204                                                 ->params(
 205                                                         $this->title->getPrefixedText(),
 206                                                         ContentHandler::getLocalizedName( $data['model'] )
 207                                                 )
 208                                 );
 209                         }
 210                 } else {
 211                         // Page doesn't exist, create an empty content object
 212                         $newContent = ContentHandler::getForModelID( $data['model'] )->makeEmptyContent();
 213                 }
 214
 215                 // All other checks have passed, let's check rate limits
 216                 if ( $user->pingLimiter( 'editcontentmodel' ) ) {
 217                         throw new ThrottledError();
 218                 }
 219
 220                 $flags = $this->oldRevision ? EDIT_UPDATE : EDIT_NEW;
 221                 $flags |= EDIT_INTERNAL;
 222                 if ( $user->isAllowed( 'bot' ) ) {
 223                         $flags |= EDIT_FORCE_BOT;
 224                 }
 225
 226                 $log = new ManualLogEntry( 'contentmodel', $this->oldRevision ? 'change' : 'new' );
 227                 $log->setPerformer( $user );
 228                 $log->setTarget( $this->title );
 229                 $log->setComment( $data['reason'] );
 230                 $log->setParameters( [
 231                         '4::oldmodel' => $oldModel,
 232                         '5::newmodel' => $data['model']
 233                 ] );
 234
 235                 $formatter = LogFormatter::newFromEntry( $log );
 236                 $formatter->setContext( RequestContext::newExtraneousContext( $this->title ) );
 237                 $reason = $formatter->getPlainActionText();
 238                 if ( $data['reason'] !== '' ) {
 239                         $reason .= $this->msg( 'colon-separator' )->inContentLanguage()->text() . $data['reason'];
 240                 }
 241
 242                 // Run edit filters
 243                 $derivativeContext = new DerivativeContext( $this->getContext() );
 244                 $derivativeContext->setTitle( $this->title );
 245                 $derivativeContext->setWikiPage( $page );
 246                 $status = new Status();
 247                 if ( !Hooks::run( 'EditFilterMergedContent',
 248                                 [ $derivativeContext, $newContent, $status, $reason,
 249                                 $user, false ] )
 250                 ) {
 251                         if ( $status->isGood() ) {
 252                                 // TODO: extensions should really specify an error message
 253                                 $status->fatal( 'hookaborted' );
 254                         }
 255                         return $status;
 256                 }
 257
 258                 $status = $page->doEditContent(
 259                         $newContent,
 260                         $reason,
 261                         $flags,
 262                         $this->oldRevision ? $this->oldRevision->getId() : false,
 263                         $user
 264                 );
 265                 if ( !$status->isOK() ) {
 266                         return $status;
 267                 }
 268
 269                 $logid = $log->insert();
 270                 $log->publish( $logid );
 271
 272                 return $status;
 273         }
 274
 275         public function onSuccess() {
 276                 $out = $this->getOutput();
 277                 $out->setPageTitle( $this->msg( 'changecontentmodel-success-title' ) );
 278                 $out->addWikiMsg( 'changecontentmodel-success-text', $this->title );
 279         }
 280
 281         /**
 282          * Return an array of subpages beginning with $search that this special page will accept.
 283          *
 284          * @param string $search Prefix to search for
 285          * @param int $limit Maximum number of results to return (usually 10)
 286          * @param int $offset Number of results to skip (usually 0)
 287          * @return string[] Matching subpages
 288          */
 289         public function prefixSearchSubpages( $search, $limit, $offset ) {
 290                 return $this->prefixSearchString( $search, $limit, $offset );
 291         }
 292
 293         protected function getGroupName() {
 294                 return 'pagetools';
 295         }
 296 }