includes/specials/SpecialEmailuser.php

   1 <?php
   2 /**
   3  * Implements Special:Emailuser
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23 use MediaWiki\MediaWikiServices;
  24
  25 /**
  26  * A special page that allows users to send e-mails to other users
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialEmailUser extends UnlistedSpecialPage {
  31         protected $mTarget;
  32
  33         /**
  34          * @var User|string $mTargetObj
  35          */
  36         protected $mTargetObj;
  37
  38         public function __construct() {
  39                 parent::__construct( 'Emailuser' );
  40         }
  41
  42         public function doesWrites() {
  43                 return true;
  44         }
  45
  46         public function getDescription() {
  47                 $target = self::getTarget( $this->mTarget, $this->getUser() );
  48                 if ( !$target instanceof User ) {
  49                         return $this->msg( 'emailuser-title-notarget' )->text();
  50                 }
  51
  52                 return $this->msg( 'emailuser-title-target', $target->getName() )->text();
  53         }
  54
  55         protected function getFormFields() {
  56                 $linkRenderer = $this->getLinkRenderer();
  57                 return [
  58                         'From' => [
  59                                 'type' => 'info',
  60                                 'raw' => 1,
  61                                 'default' => $linkRenderer->makeLink(
  62                                         $this->getUser()->getUserPage(),
  63                                         $this->getUser()->getName()
  64                                 ),
  65                                 'label-message' => 'emailfrom',
  66                                 'id' => 'mw-emailuser-sender',
  67                         ],
  68                         'To' => [
  69                                 'type' => 'info',
  70                                 'raw' => 1,
  71                                 'default' => $linkRenderer->makeLink(
  72                                         $this->mTargetObj->getUserPage(),
  73                                         $this->mTargetObj->getName()
  74                                 ),
  75                                 'label-message' => 'emailto',
  76                                 'id' => 'mw-emailuser-recipient',
  77                         ],
  78                         'Target' => [
  79                                 'type' => 'hidden',
  80                                 'default' => $this->mTargetObj->getName(),
  81                         ],
  82                         'Subject' => [
  83                                 'type' => 'text',
  84                                 'default' => $this->msg( 'defemailsubject',
  85                                         $this->getUser()->getName() )->inContentLanguage()->text(),
  86                                 'label-message' => 'emailsubject',
  87                                 'maxlength' => 200,
  88                                 'size' => 60,
  89                                 'required' => true,
  90                         ],
  91                         'Text' => [
  92                                 'type' => 'textarea',
  93                                 'rows' => 20,
  94                                 'cols' => 80,
  95                                 'label-message' => 'emailmessage',
  96                                 'required' => true,
  97                         ],
  98                         'CCMe' => [
  99                                 'type' => 'check',
 100                                 'label-message' => 'emailccme',
 101                                 'default' => $this->getUser()->getBoolOption( 'ccmeonemails' ),
 102                         ],
 103                 ];
 104         }
 105
 106         public function execute( $par ) {
 107                 $out = $this->getOutput();
 108                 $out->addModuleStyles( 'mediawiki.special' );
 109
 110                 $this->mTarget = is_null( $par )
 111                         ? $this->getRequest()->getVal( 'wpTarget', $this->getRequest()->getVal( 'target', '' ) )
 112                         : $par;
 113
 114                 // This needs to be below assignment of $this->mTarget because
 115                 // getDescription() needs it to determine the correct page title.
 116                 $this->setHeaders();
 117                 $this->outputHeader();
 118
 119                 // error out if sending user cannot do this
 120                 $error = self::getPermissionsError(
 121                         $this->getUser(),
 122                         $this->getRequest()->getVal( 'wpEditToken' ),
 123                         $this->getConfig()
 124                 );
 125
 126                 switch ( $error ) {
 127                         case null:
 128                                 # Wahey!
 129                                 break;
 130                         case 'badaccess':
 131                                 throw new PermissionsError( 'sendemail' );
 132                         case 'blockedemailuser':
 133                                 throw new UserBlockedError( $this->getUser()->mBlock );
 134                         case 'actionthrottledtext':
 135                                 throw new ThrottledError;
 136                         case 'mailnologin':
 137                         case 'usermaildisabled':
 138                                 throw new ErrorPageError( $error, "{$error}text" );
 139                         default:
 140                                 # It's a hook error
 141                                 list( $title, $msg, $params ) = $error;
 142                                 throw new ErrorPageError( $title, $msg, $params );
 143                 }
 144                 // Got a valid target user name? Else ask for one.
 145                 $ret = self::getTarget( $this->mTarget, $this->getUser() );
 146                 if ( !$ret instanceof User ) {
 147                         if ( $this->mTarget != '' ) {
 148                                 // Messages used here: notargettext, noemailtext, nowikiemailtext
 149                                 $ret = ( $ret == 'notarget' ) ? 'emailnotarget' : ( $ret . 'text' );
 150                                 $out->wrapWikiMsg( "<p class='error'>$1</p>", $ret );
 151                         }
 152                         $out->addHTML( $this->userForm( $this->mTarget ) );
 153
 154                         return;
 155                 }
 156
 157                 $this->mTargetObj = $ret;
 158
 159                 // Set the 'relevant user' in the skin, so it displays links like Contributions,
 160                 // User logs, UserRights, etc.
 161                 $this->getSkin()->setRelevantUser( $this->mTargetObj );
 162
 163                 $context = new DerivativeContext( $this->getContext() );
 164                 $context->setTitle( $this->getPageTitle() ); // Remove subpage
 165                 $form = new HTMLForm( $this->getFormFields(), $context );
 166                 // By now we are supposed to be sure that $this->mTarget is a user name
 167                 $form->addPreText( $this->msg( 'emailpagetext', $this->mTarget )->parse() );
 168                 $form->setSubmitTextMsg( 'emailsend' );
 169                 $form->setSubmitCallback( [ __CLASS__, 'uiSubmit' ] );
 170                 $form->setWrapperLegendMsg( 'email-legend' );
 171                 $form->loadData();
 172
 173                 if ( !Hooks::run( 'EmailUserForm', [ &$form ] ) ) {
 174                         return;
 175                 }
 176
 177                 $result = $form->show();
 178
 179                 if ( $result === true || ( $result instanceof Status && $result->isGood() ) ) {
 180                         $out->setPageTitle( $this->msg( 'emailsent' ) );
 181                         $out->addWikiMsg( 'emailsenttext', $this->mTarget );
 182                         $out->returnToMain( false, $this->mTargetObj->getUserPage() );
 183                 }
 184         }
 185
 186         /**
 187          * Validate target User
 188          *
 189          * @param string $target Target user name
 190          * @param User|null $sender User sending the email
 191          * @return User|string User object on success or a string on error
 192          */
 193         public static function getTarget( $target, User $sender = null ) {
 194                 if ( $sender === null ) {
 195                         wfDeprecated( __METHOD__ . ' without specifying the sending user', '1.30' );
 196                 }
 197
 198                 if ( $target == '' ) {
 199                         wfDebug( "Target is empty.\n" );
 200
 201                         return 'notarget';
 202                 }
 203
 204                 $nu = User::newFromName( $target );
 205                 $error = self::validateTarget( $nu, $sender );
 206
 207                 return $error ? $error : $nu;
 208         }
 209
 210         /**
 211          * Validate target User
 212          *
 213          * @param User $target Target user
 214          * @param User|null $sender User sending the email
 215          * @return string Error message or empty string if valid.
 216          * @since 1.30
 217          */
 218         public static function validateTarget( $target, User $sender = null ) {
 219                 if ( $sender === null ) {
 220                         wfDeprecated( __METHOD__ . ' without specifying the sending user', '1.30' );
 221                 }
 222
 223                 if ( !$target instanceof User || !$target->getId() ) {
 224                         wfDebug( "Target is invalid user.\n" );
 225
 226                         return 'notarget';
 227                 }
 228
 229                 if ( !$target->isEmailConfirmed() ) {
 230                         wfDebug( "User has no valid email.\n" );
 231
 232                         return 'noemail';
 233                 }
 234
 235                 if ( !$target->canReceiveEmail() ) {
 236                         wfDebug( "User does not allow user emails.\n" );
 237
 238                         return 'nowikiemail';
 239                 }
 240
 241                 if (
 242                         $target->getEditCount() === 0
 243                         && ( $sender === null || !$sender->isAllowed( 'sendemail-new-users' ) )
 244                 ) {
 245                         // Determine if target has any other logged actions.
 246                         $dbr = wfGetDB( DB_REPLICA );
 247                         $log_id = $dbr->selectField(
 248                                 'logging',
 249                                 'log_id',
 250                                 [
 251                                         'log_user' => $target->getId(),
 252                                         "NOT (log_type = 'newusers' AND log_action = 'autocreate')",
 253                                 ],
 254                                 __METHOD__,
 255                                 [ 'LIMIT' => 1 ]
 256                         );
 257
 258                         if ( !$log_id ) {
 259                                 wfDebug( "User has no logged actions on this wiki.\n" );
 260
 261                                 return 'nowikiemail';
 262                         }
 263                 }
 264
 265                 if ( $sender !== null ) {
 266                         $blacklist = $target->getOption( 'email-blacklist', [] );
 267                         if ( $blacklist ) {
 268                                 $lookup = CentralIdLookup::factory();
 269                                 $senderId = $lookup->centralIdFromLocalUser( $sender );
 270                                 if ( $senderId !== 0 && in_array( $senderId, $blacklist ) ) {
 271                                         wfDebug( "User does not allow user emails from this user.\n" );
 272
 273                                         return 'nowikiemail';
 274                                 }
 275                         }
 276                 }
 277
 278                 return '';
 279         }
 280
 281         /**
 282          * Check whether a user is allowed to send email
 283          *
 284          * @param User $user
 285          * @param string $editToken Edit token
 286          * @param Config $config optional for backwards compatibility
 287          * @return string|null Null on success or string on error
 288          */
 289         public static function getPermissionsError( $user, $editToken, Config $config = null ) {
 290                 if ( $config === null ) {
 291                         wfDebug( __METHOD__ . ' called without a Config instance passed to it' );
 292                         $config = MediaWikiServices::getInstance()->getMainConfig();
 293                 }
 294                 if ( !$config->get( 'EnableEmail' ) || !$config->get( 'EnableUserEmail' ) ) {
 295                         return 'usermaildisabled';
 296                 }
 297
 298                 // Run this before $user->isAllowed, to show appropriate message to anons (T160309)
 299                 if ( !$user->isEmailConfirmed() ) {
 300                         return 'mailnologin';
 301                 }
 302
 303                 if ( !$user->isAllowed( 'sendemail' ) ) {
 304                         return 'badaccess';
 305                 }
 306
 307                 if ( $user->isBlockedFromEmailuser() ) {
 308                         wfDebug( "User is blocked from sending e-mail.\n" );
 309
 310                         return "blockedemailuser";
 311                 }
 312
 313                 // Check the ping limiter without incrementing it - we'll check it
 314                 // again later and increment it on a successful send
 315                 if ( $user->pingLimiter( 'emailuser', 0 ) ) {
 316                         wfDebug( "Ping limiter triggered.\n" );
 317
 318                         return 'actionthrottledtext';
 319                 }
 320
 321                 $hookErr = false;
 322
 323                 Hooks::run( 'UserCanSendEmail', [ &$user, &$hookErr ] );
 324                 Hooks::run( 'EmailUserPermissionsErrors', [ $user, $editToken, &$hookErr ] );
 325
 326                 if ( $hookErr ) {
 327                         return $hookErr;
 328                 }
 329
 330                 return null;
 331         }
 332
 333         /**
 334          * Form to ask for target user name.
 335          *
 336          * @param string $name User name submitted.
 337          * @return string Form asking for user name.
 338          */
 339         protected function userForm( $name ) {
 340                 $this->getOutput()->addModules( 'mediawiki.userSuggest' );
 341                 $string = Html::openElement(
 342                                 'form',
 343                                 [ 'method' => 'get', 'action' => wfScript(), 'id' => 'askusername' ]
 344                         ) .
 345                         Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() ) .
 346                         Html::openElement( 'fieldset' ) .
 347                         Html::rawElement( 'legend', null, $this->msg( 'emailtarget' )->parse() ) .
 348                         Html::label(
 349                                 $this->msg( 'emailusername' )->text(),
 350                                 'emailusertarget'
 351                         ) . '&#160;' .
 352                         Html::input(
 353                                 'target',
 354                                 $name,
 355                                 'text',
 356                                 [
 357                                         'id' => 'emailusertarget',
 358                                         'class' => 'mw-autocomplete-user', // used by mediawiki.userSuggest
 359                                         'autofocus' => true,
 360                                         'size' => 30,
 361                                 ]
 362                         ) .
 363                         ' ' .
 364                         Html::submitButton( $this->msg( 'emailusernamesubmit' )->text(), [] ) .
 365                         Html::closeElement( 'fieldset' ) .
 366                         Html::closeElement( 'form' ) . "\n";
 367
 368                 return $string;
 369         }
 370
 371         /**
 372          * Submit callback for an HTMLForm object, will simply call submit().
 373          *
 374          * @since 1.20
 375          * @param array $data
 376          * @param HTMLForm $form
 377          * @return Status|bool
 378          */
 379         public static function uiSubmit( array $data, HTMLForm $form ) {
 380                 return self::submit( $data, $form->getContext() );
 381         }
 382
 383         /**
 384          * Really send a mail. Permissions should have been checked using
 385          * getPermissionsError(). It is probably also a good
 386          * idea to check the edit token and ping limiter in advance.
 387          *
 388          * @param array $data
 389          * @param IContextSource $context
 390          * @return Status|bool
 391          */
 392         public static function submit( array $data, IContextSource $context ) {
 393                 $config = $context->getConfig();
 394
 395                 $target = self::getTarget( $data['Target'], $context->getUser() );
 396                 if ( !$target instanceof User ) {
 397                         // Messages used here: notargettext, noemailtext, nowikiemailtext
 398                         return Status::newFatal( $target . 'text' );
 399                 }
 400
 401                 $to = MailAddress::newFromUser( $target );
 402                 $from = MailAddress::newFromUser( $context->getUser() );
 403                 $subject = $data['Subject'];
 404                 $text = $data['Text'];
 405
 406                 // Add a standard footer and trim up trailing newlines
 407                 $text = rtrim( $text ) . "\n\n-- \n";
 408                 $text .= $context->msg( 'emailuserfooter',
 409                         $from->name, $to->name )->inContentLanguage()->text();
 410
 411                 // Check and increment the rate limits
 412                 if ( $context->getUser()->pingLimiter( 'emailuser' ) ) {
 413                         throw new ThrottledError();
 414                 }
 415
 416                 $error = false;
 417                 if ( !Hooks::run( 'EmailUser', [ &$to, &$from, &$subject, &$text, &$error ] ) ) {
 418                         if ( $error instanceof Status ) {
 419                                 return $error;
 420                         } elseif ( $error === false || $error === '' || $error === [] ) {
 421                                 // Possibly to tell HTMLForm to pretend there was no submission?
 422                                 return false;
 423                         } elseif ( $error === true ) {
 424                                 // Hook sent the mail itself and indicates success?
 425                                 return Status::newGood();
 426                         } elseif ( is_array( $error ) ) {
 427                                 $status = Status::newGood();
 428                                 foreach ( $error as $e ) {
 429                                         $status->fatal( $e );
 430                                 }
 431                                 return $status;
 432                         } elseif ( $error instanceof MessageSpecifier ) {
 433                                 return Status::newFatal( $error );
 434                         } else {
 435                                 // Ugh. Either a raw HTML string, or something that's supposed
 436                                 // to be treated like one.
 437                                 $type = is_object( $error ) ? get_class( $error ) : gettype( $error );
 438                                 wfDeprecated( "EmailUser hook returning a $type as \$error", '1.29' );
 439                                 return Status::newFatal( new ApiRawMessage(
 440                                         [ '$1', Message::rawParam( (string)$error ) ], 'hookaborted'
 441                                 ) );
 442                         }
 443                 }
 444
 445                 if ( $config->get( 'UserEmailUseReplyTo' ) ) {
 446                         /**
 447                          * Put the generic wiki autogenerated address in the From:
 448                          * header and reserve the user for Reply-To.
 449                          *
 450                          * This is a bit ugly, but will serve to differentiate
 451                          * wiki-borne mails from direct mails and protects against
 452                          * SPF and bounce problems with some mailers (see below).
 453                          */
 454                         $mailFrom = new MailAddress( $config->get( 'PasswordSender' ),
 455                                 wfMessage( 'emailsender' )->inContentLanguage()->text() );
 456                         $replyTo = $from;
 457                 } else {
 458                         /**
 459                          * Put the sending user's e-mail address in the From: header.
 460                          *
 461                          * This is clean-looking and convenient, but has issues.
 462                          * One is that it doesn't as clearly differentiate the wiki mail
 463                          * from "directly" sent mails.
 464                          *
 465                          * Another is that some mailers (like sSMTP) will use the From
 466                          * address as the envelope sender as well. For open sites this
 467                          * can cause mails to be flunked for SPF violations (since the
 468                          * wiki server isn't an authorized sender for various users'
 469                          * domains) as well as creating a privacy issue as bounces
 470                          * containing the recipient's e-mail address may get sent to
 471                          * the sending user.
 472                          */
 473                         $mailFrom = $from;
 474                         $replyTo = null;
 475                 }
 476
 477                 $status = UserMailer::send( $to, $mailFrom, $subject, $text, [
 478                         'replyTo' => $replyTo,
 479                 ] );
 480
 481                 if ( !$status->isGood() ) {
 482                         return $status;
 483                 } else {
 484                         // if the user requested a copy of this mail, do this now,
 485                         // unless they are emailing themselves, in which case one
 486                         // copy of the message is sufficient.
 487                         if ( $data['CCMe'] && $to != $from ) {
 488                                 $ccTo = $from;
 489                                 $ccFrom = $from;
 490                                 $ccSubject = $context->msg( 'emailccsubject' )->rawParams(
 491                                         $target->getName(), $subject )->text();
 492                                 $ccText = $text;
 493
 494                                 Hooks::run( 'EmailUserCC', [ &$ccTo, &$ccFrom, &$ccSubject, &$ccText ] );
 495
 496                                 if ( $config->get( 'UserEmailUseReplyTo' ) ) {
 497                                         $mailFrom = new MailAddress(
 498                                                 $config->get( 'PasswordSender' ),
 499                                                 wfMessage( 'emailsender' )->inContentLanguage()->text()
 500                                         );
 501                                         $replyTo = $ccFrom;
 502                                 } else {
 503                                         $mailFrom = $ccFrom;
 504                                         $replyTo = null;
 505                                 }
 506
 507                                 $ccStatus = UserMailer::send(
 508                                         $ccTo, $mailFrom, $ccSubject, $ccText, [
 509                                                 'replyTo' => $replyTo,
 510                                 ] );
 511                                 $status->merge( $ccStatus );
 512                         }
 513
 514                         Hooks::run( 'EmailUserComplete', [ $to, $from, $subject, $text ] );
 515
 516                         return $status;
 517                 }
 518         }
 519
 520         /**
 521          * Return an array of subpages beginning with $search that this special page will accept.
 522          *
 523          * @param string $search Prefix to search for
 524          * @param int $limit Maximum number of results to return (usually 10)
 525          * @param int $offset Number of results to skip (usually 0)
 526          * @return string[] Matching subpages
 527          */
 528         public function prefixSearchSubpages( $search, $limit, $offset ) {
 529                 $user = User::newFromName( $search );
 530                 if ( !$user ) {
 531                         // No prefix suggestion for invalid user
 532                         return [];
 533                 }
 534                 // Autocomplete subpage as user list - public to allow caching
 535                 return UserNamePrefixSearch::search( 'public', $search, $limit, $offset );
 536         }
 537
 538         protected function getGroupName() {
 539                 return 'users';
 540         }
 541 }