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
  24 /**
  25  * A special page that allows users to send e-mails to other users
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class SpecialEmailUser extends UnlistedSpecialPage {
  30         protected $mTarget;
  31
  32         /**
  33          * @var User|string $mTargetObj
  34          */
  35         protected $mTargetObj;
  36
  37         public function __construct() {
  38                 parent::__construct( 'Emailuser' );
  39         }
  40
  41         public function getDescription() {
  42                 $target = self::getTarget( $this->mTarget );
  43                 if ( !$target instanceof User ) {
  44                         return $this->msg( 'emailuser-title-notarget' )->text();
  45                 }
  46
  47                 return $this->msg( 'emailuser-title-target', $target->getName() )->text();
  48         }
  49
  50         protected function getFormFields() {
  51                 return array(
  52                         'From' => array(
  53                                 'type' => 'info',
  54                                 'raw' => 1,
  55                                 'default' => Linker::link(
  56                                         $this->getUser()->getUserPage(),
  57                                         htmlspecialchars( $this->getUser()->getName() )
  58                                 ),
  59                                 'label-message' => 'emailfrom',
  60                                 'id' => 'mw-emailuser-sender',
  61                         ),
  62                         'To' => array(
  63                                 'type' => 'info',
  64                                 'raw' => 1,
  65                                 'default' => Linker::link(
  66                                         $this->mTargetObj->getUserPage(),
  67                                         htmlspecialchars( $this->mTargetObj->getName() )
  68                                 ),
  69                                 'label-message' => 'emailto',
  70                                 'id' => 'mw-emailuser-recipient',
  71                         ),
  72                         'Target' => array(
  73                                 'type' => 'hidden',
  74                                 'default' => $this->mTargetObj->getName(),
  75                         ),
  76                         'Subject' => array(
  77                                 'type' => 'text',
  78                                 'default' => $this->msg( 'defemailsubject',
  79                                         $this->getUser()->getName() )->inContentLanguage()->text(),
  80                                 'label-message' => 'emailsubject',
  81                                 'maxlength' => 200,
  82                                 'size' => 60,
  83                                 'required' => true,
  84                         ),
  85                         'Text' => array(
  86                                 'type' => 'textarea',
  87                                 'rows' => 20,
  88                                 'cols' => 80,
  89                                 'label-message' => 'emailmessage',
  90                                 'required' => true,
  91                         ),
  92                         'CCMe' => array(
  93                                 'type' => 'check',
  94                                 'label-message' => 'emailccme',
  95                                 'default' => $this->getUser()->getBoolOption( 'ccmeonemails' ),
  96                         ),
  97                 );
  98         }
  99
 100         public function execute( $par ) {
 101                 $out = $this->getOutput();
 102                 $out->addModuleStyles( 'mediawiki.special' );
 103
 104                 $this->mTarget = is_null( $par )
 105                         ? $this->getRequest()->getVal( 'wpTarget', $this->getRequest()->getVal( 'target', '' ) )
 106                         : $par;
 107
 108                 // This needs to be below assignment of $this->mTarget because
 109                 // getDescription() needs it to determine the correct page title.
 110                 $this->setHeaders();
 111                 $this->outputHeader();
 112
 113                 // error out if sending user cannot do this
 114                 $error = self::getPermissionsError(
 115                         $this->getUser(),
 116                         $this->getRequest()->getVal( 'wpEditToken' )
 117                 );
 118
 119                 switch ( $error ) {
 120                         case null:
 121                                 # Wahey!
 122                                 break;
 123                         case 'badaccess':
 124                                 throw new PermissionsError( 'sendemail' );
 125                         case 'blockedemailuser':
 126                                 throw new UserBlockedError( $this->getUser()->mBlock );
 127                         case 'actionthrottledtext':
 128                                 throw new ThrottledError;
 129                         case 'mailnologin':
 130                         case 'usermaildisabled':
 131                                 throw new ErrorPageError( $error, "{$error}text" );
 132                         default:
 133                                 # It's a hook error
 134                                 list( $title, $msg, $params ) = $error;
 135                                 throw new ErrorPageError( $title, $msg, $params );
 136                 }
 137                 // Got a valid target user name? Else ask for one.
 138                 $ret = self::getTarget( $this->mTarget );
 139                 if ( !$ret instanceof User ) {
 140                         if ( $this->mTarget != '' ) {
 141                                 // Messages used here: notargettext, noemailtext, nowikiemailtext
 142                                 $ret = ( $ret == 'notarget' ) ? 'emailnotarget' : ( $ret . 'text' );
 143                                 $out->wrapWikiMsg( "<p class='error'>$1</p>", $ret );
 144                         }
 145                         $out->addHTML( $this->userForm( $this->mTarget ) );
 146
 147                         return;
 148                 }
 149
 150                 $this->mTargetObj = $ret;
 151
 152                 $context = new DerivativeContext( $this->getContext() );
 153                 $context->setTitle( $this->getPageTitle() ); // Remove subpage
 154                 $form = new HTMLForm( $this->getFormFields(), $context );
 155                 // By now we are supposed to be sure that $this->mTarget is a user name
 156                 $form->addPreText( $this->msg( 'emailpagetext', $this->mTarget )->parse() );
 157                 $form->setSubmitTextMsg( 'emailsend' );
 158                 $form->setSubmitCallback( array( __CLASS__, 'uiSubmit' ) );
 159                 $form->setWrapperLegendMsg( 'email-legend' );
 160                 $form->loadData();
 161
 162                 if ( !wfRunHooks( 'EmailUserForm', array( &$form ) ) ) {
 163                         return;
 164                 }
 165
 166                 $result = $form->show();
 167
 168                 if ( $result === true || ( $result instanceof Status && $result->isGood() ) ) {
 169                         $out->setPageTitle( $this->msg( 'emailsent' ) );
 170                         $out->addWikiMsg( 'emailsenttext', $this->mTarget );
 171                         $out->returnToMain( false, $this->mTargetObj->getUserPage() );
 172                 }
 173         }
 174
 175         /**
 176          * Validate target User
 177          *
 178          * @param string $target Target user name
 179          * @return User User object on success or a string on error
 180          */
 181         public static function getTarget( $target ) {
 182                 if ( $target == '' ) {
 183                         wfDebug( "Target is empty.\n" );
 184
 185                         return 'notarget';
 186                 }
 187
 188                 $nu = User::newFromName( $target );
 189                 if ( !$nu instanceof User || !$nu->getId() ) {
 190                         wfDebug( "Target is invalid user.\n" );
 191
 192                         return 'notarget';
 193                 } elseif ( !$nu->isEmailConfirmed() ) {
 194                         wfDebug( "User has no valid email.\n" );
 195
 196                         return 'noemail';
 197                 } elseif ( !$nu->canReceiveEmail() ) {
 198                         wfDebug( "User does not allow user emails.\n" );
 199
 200                         return 'nowikiemail';
 201                 }
 202
 203                 return $nu;
 204         }
 205
 206         /**
 207          * Check whether a user is allowed to send email
 208          *
 209          * @param User $user
 210          * @param string $editToken Edit token
 211          * @return string|null Null on success or string on error
 212          */
 213         public static function getPermissionsError( $user, $editToken ) {
 214                 global $wgEnableEmail, $wgEnableUserEmail;
 215
 216                 if ( !$wgEnableEmail || !$wgEnableUserEmail ) {
 217                         return 'usermaildisabled';
 218                 }
 219
 220                 if ( !$user->isAllowed( 'sendemail' ) ) {
 221                         return 'badaccess';
 222                 }
 223
 224                 if ( !$user->isEmailConfirmed() ) {
 225                         return 'mailnologin';
 226                 }
 227
 228                 if ( $user->isBlockedFromEmailuser() ) {
 229                         wfDebug( "User is blocked from sending e-mail.\n" );
 230
 231                         return "blockedemailuser";
 232                 }
 233
 234                 if ( $user->pingLimiter( 'emailuser' ) ) {
 235                         wfDebug( "Ping limiter triggered.\n" );
 236
 237                         return 'actionthrottledtext';
 238                 }
 239
 240                 $hookErr = false;
 241
 242                 wfRunHooks( 'UserCanSendEmail', array( &$user, &$hookErr ) );
 243                 wfRunHooks( 'EmailUserPermissionsErrors', array( $user, $editToken, &$hookErr ) );
 244
 245                 if ( $hookErr ) {
 246                         return $hookErr;
 247                 }
 248
 249                 return null;
 250         }
 251
 252         /**
 253          * Form to ask for target user name.
 254          *
 255          * @param string $name User name submitted.
 256          * @return string Form asking for user name.
 257          */
 258         protected function userForm( $name ) {
 259                 global $wgScript;
 260                 $string = Xml::openElement(
 261                         'form',
 262                         array( 'method' => 'get', 'action' => $wgScript, 'id' => 'askusername' )
 263                 ) .
 264                         Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() ) .
 265                         Xml::openElement( 'fieldset' ) .
 266                         Html::rawElement( 'legend', null, $this->msg( 'emailtarget' )->parse() ) .
 267                         Xml::inputLabel(
 268                                 $this->msg( 'emailusername' )->text(),
 269                                 'target',
 270                                 'emailusertarget',
 271                                 30,
 272                                 $name
 273                         ) .
 274                         ' ' .
 275                         Xml::submitButton( $this->msg( 'emailusernamesubmit' )->text() ) .
 276                         Xml::closeElement( 'fieldset' ) .
 277                         Xml::closeElement( 'form' ) . "\n";
 278
 279                 return $string;
 280         }
 281
 282         /**
 283          * Submit callback for an HTMLForm object, will simply call submit().
 284          *
 285          * @since 1.20
 286          * @param array $data
 287          * @param HTMLForm $form
 288          * @return Status|string|bool
 289          */
 290         public static function uiSubmit( array $data, HTMLForm $form ) {
 291                 return self::submit( $data, $form->getContext() );
 292         }
 293
 294         /**
 295          * Really send a mail. Permissions should have been checked using
 296          * getPermissionsError(). It is probably also a good
 297          * idea to check the edit token and ping limiter in advance.
 298          *
 299          * @param array $data
 300          * @param IContextSource $context
 301          * @return Status|string|bool Status object, or potentially a String on error
 302          * or maybe even true on success if anything uses the EmailUser hook.
 303          */
 304         public static function submit( array $data, IContextSource $context ) {
 305                 global $wgUserEmailUseReplyTo;
 306
 307                 $target = self::getTarget( $data['Target'] );
 308                 if ( !$target instanceof User ) {
 309                         // Messages used here: notargettext, noemailtext, nowikiemailtext
 310                         return $context->msg( $target . 'text' )->parseAsBlock();
 311                 }
 312
 313                 $to = new MailAddress( $target );
 314                 $from = new MailAddress( $context->getUser() );
 315                 $subject = $data['Subject'];
 316                 $text = $data['Text'];
 317
 318                 // Add a standard footer and trim up trailing newlines
 319                 $text = rtrim( $text ) . "\n\n-- \n";
 320                 $text .= $context->msg( 'emailuserfooter',
 321                         $from->name, $to->name )->inContentLanguage()->text();
 322
 323                 $error = '';
 324                 if ( !wfRunHooks( 'EmailUser', array( &$to, &$from, &$subject, &$text, &$error ) ) ) {
 325                         return $error;
 326                 }
 327
 328                 if ( $wgUserEmailUseReplyTo ) {
 329                         // Put the generic wiki autogenerated address in the From:
 330                         // header and reserve the user for Reply-To.
 331                         //
 332                         // This is a bit ugly, but will serve to differentiate
 333                         // wiki-borne mails from direct mails and protects against
 334                         // SPF and bounce problems with some mailers (see below).
 335                         global $wgPasswordSender;
 336
 337                         $mailFrom = new MailAddress( $wgPasswordSender,
 338                                 wfMessage( 'emailsender' )->inContentLanguage()->text() );
 339                         $replyTo = $from;
 340                 } else {
 341                         // Put the sending user's e-mail address in the From: header.
 342                         //
 343                         // This is clean-looking and convenient, but has issues.
 344                         // One is that it doesn't as clearly differentiate the wiki mail
 345                         // from "directly" sent mails.
 346                         //
 347                         // Another is that some mailers (like sSMTP) will use the From
 348                         // address as the envelope sender as well. For open sites this
 349                         // can cause mails to be flunked for SPF violations (since the
 350                         // wiki server isn't an authorized sender for various users'
 351                         // domains) as well as creating a privacy issue as bounces
 352                         // containing the recipient's e-mail address may get sent to
 353                         // the sending user.
 354                         $mailFrom = $from;
 355                         $replyTo = null;
 356                 }
 357
 358                 $status = UserMailer::send( $to, $mailFrom, $subject, $text, $replyTo );
 359
 360                 if ( !$status->isGood() ) {
 361                         return $status;
 362                 } else {
 363                         // if the user requested a copy of this mail, do this now,
 364                         // unless they are emailing themselves, in which case one
 365                         // copy of the message is sufficient.
 366                         if ( $data['CCMe'] && $to != $from ) {
 367                                 $cc_subject = $context->msg( 'emailccsubject' )->rawParams(
 368                                         $target->getName(), $subject )->text();
 369                                 wfRunHooks( 'EmailUserCC', array( &$from, &$from, &$cc_subject, &$text ) );
 370                                 $ccStatus = UserMailer::send( $from, $from, $cc_subject, $text );
 371                                 $status->merge( $ccStatus );
 372                         }
 373
 374                         wfRunHooks( 'EmailUserComplete', array( $to, $from, $subject, $text ) );
 375
 376                         return $status;
 377                 }
 378         }
 379
 380         protected function getGroupName() {
 381                 return 'users';
 382         }
 383 }