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