SpecialEmailuser.php

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<?php
class SpecialEmailUser extends UnlistedSpecialPage {
        protected $mTarget;

        public function __construct() {
                parent::__construct( 'Emailuser' );
        }

        protected function getFormFields() {
                return array(
                        'From' => array(
                                'type' => 'info',
                                'raw' => 1,
                                'default' => Linker::link(
                                        $this->getUser()->getUserPage(),
                                        htmlspecialchars( $this->getUser()->getName() )
                                ),
                                'label-message' => 'emailfrom',
                                'id' => 'mw-emailuser-sender',
                        ),
                        'To' => array(
                                'type' => 'info',
                                'raw' => 1,
                                'default' => Linker::link(
                                        $this->mTargetObj->getUserPage(),
                                        htmlspecialchars( $this->mTargetObj->getName() )
                                ),
                                'label-message' => 'emailto',
                                'id' => 'mw-emailuser-recipient',
                        ),
                        'Target' => array(
                                'type' => 'hidden',
                                'default' => $this->mTargetObj->getName(),
                        ),
                        'Subject' => array(
                                'type' => 'text',
                                'default' => wfMsgExt( 'defemailsubject', array( 'content', 'parsemag' ), $this->getUser()->getName() ),
                                'label-message' => 'emailsubject',
                                'maxlength' => 200,
                                'size' => 60,
                                'required' => 1,
                        ),
                        'Text' => array(
                                'type' => 'textarea',
                                'rows' => 20,
                                'cols' => 80,
                                'label-message' => 'emailmessage',
                                'required' => 1,
                        ),
                        'CCMe' => array(
                                'type' => 'check',
                                'label-message' => 'emailccme',
                                'default' => $this->getUser()->getBoolOption( 'ccmeonemails' ),
                        ),
                );
        }

        public function execute( $par ) {
                $this->setHeaders();
                $this->outputHeader();
                $out = $this->getOutput();
                $out->addModuleStyles( 'mediawiki.special' );
                $this->mTarget = is_null( $par )
                        ? $this->getRequest()->getVal( 'wpTarget', $this->getRequest()->getVal( 'target', '' ) )
                        : $par;
                // error out if sending user cannot do this
                $error = self::getPermissionsError( $this->getUser(), $this->getRequest()->getVal( 'wpEditToken' ) );
                switch ( $error ) {
                        case null:
                                # Wahey!
                                break;
                        case 'badaccess':
                                throw new PermissionsError( 'sendemail' );
                        case 'blockedemailuser':
                                throw new UserBlockedError( $this->getUser()->mBlock );
                        case 'actionthrottledtext':
                                throw new ThrottledError;
                        case 'mailnologin':
                        case 'usermaildisabled':
                                throw new  ErrorPageError( $error, "{$error}text" );
                        default:
                                # It's a hook error
                                list( $title, $msg, $params ) = $error;
                                throw new  ErrorPageError( $title, $msg, $params );
                }
                // Got a valid target user name? Else ask for one.
                $ret = self::getTarget( $this->mTarget );
                if( !$ret instanceof User ) {
                        if( $this->mTarget != '' ) {
                                $ret = ( $ret == 'notarget' ) ? 'emailnotarget' : ( $ret . 'text' );
                                $out->wrapWikiMsg( "<p class='error'>$1</p>", $ret );
                        }
                        $out->addHTML( $this->userForm( $this->mTarget ) );
                        return false;
                }

                $this->mTargetObj = $ret;

                $form = new HTMLForm( $this->getFormFields(), $this->getContext() );
                $form->addPreText( wfMsgExt( 'emailpagetext', 'parseinline' ) );
                $form->setSubmitText( wfMsg( 'emailsend' ) );
                $form->setTitle( $this->getTitle() );
                $form->setSubmitCallback( array( __CLASS__, 'submit' ) );
                $form->setWrapperLegend( wfMsgExt( 'email-legend', 'parsemag' ) );
                $form->loadData();

                if( !wfRunHooks( 'EmailUserForm', array( &$form ) ) ) {
                        return false;
                }

                $out->setPageTitle( $this->msg( 'emailpage' ) );
                $result = $form->show();

                if( $result === true || ( $result instanceof Status && $result->isGood() ) ) {
                        $out->setPageTitle( $this->msg( 'emailsent' ) );
                        $out->addWikiMsg( 'emailsenttext' );
                        $out->returnToMain( false, $this->mTargetObj->getUserPage() );
                }
        }

        public static function getTarget( $target ) {
                if ( $target == '' ) {
                        wfDebug( "Target is empty.\n" );
                        return 'notarget';
                }

                $nu = User::newFromName( $target );
                if( !$nu instanceof User || !$nu->getId() ) {
                        wfDebug( "Target is invalid user.\n" );
                        return 'notarget';
                } elseif ( !$nu->isEmailConfirmed() ) {
                        wfDebug( "User has no valid email.\n" );
                        return 'noemail';
                } elseif ( !$nu->canReceiveEmail() ) {
                        wfDebug( "User does not allow user emails.\n" );
                        return 'nowikiemail';
                }

                return $nu;
        }

        public static function getPermissionsError( $user, $editToken ) {
                global $wgEnableEmail, $wgEnableUserEmail;
                if( !$wgEnableEmail || !$wgEnableUserEmail ) {
                        return 'usermaildisabled';
                }

                if( !$user->isAllowed( 'sendemail' ) ) {
                        return 'badaccess';
                }

                if( !$user->isEmailConfirmed() ) {
                        return 'mailnologin';
                }

                if( $user->isBlockedFromEmailuser() ) {
                        wfDebug( "User is blocked from sending e-mail.\n" );
                        return "blockedemailuser";
                }

                if( $user->pingLimiter( 'emailuser' ) ) {
                        wfDebug( "Ping limiter triggered.\n" );
                        return 'actionthrottledtext';
                }

                $hookErr = false;
                wfRunHooks( 'UserCanSendEmail', array( &$user, &$hookErr ) );
                wfRunHooks( 'EmailUserPermissionsErrors', array( $user, $editToken, &$hookErr ) );
                if ( $hookErr ) {
                        return $hookErr;
                }

                return null;
        }

        protected function userForm( $name ) {
                global $wgScript;
                $string = Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript, 'id' => 'askusername' ) ) .
                        Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) .
                        Xml::openElement( 'fieldset' ) .
                        Html::rawElement( 'legend', null, wfMessage( 'emailtarget' )->parse() ) .
                        Xml::inputLabel( wfMessage( 'emailusername' )->text(), 'target', 'emailusertarget', 30, $name ) . ' ' .
                        Xml::submitButton( wfMessage( 'emailusernamesubmit' )->text() ) .
                        Xml::closeElement( 'fieldset' ) .
                        Xml::closeElement( 'form' ) . "\n";
                return $string;
        }

        public static function submit( $data ) {
                global $wgUser, $wgUserEmailUseReplyTo;

                $target = self::getTarget( $data['Target'] );
                if( !$target instanceof User ) {
                        return wfMsgExt( $target . 'text', 'parse' );
                }
                $to = new MailAddress( $target );
                $from = new MailAddress( $wgUser );
                $subject = $data['Subject'];
                $text = $data['Text'];

                // Add a standard footer and trim up trailing newlines
                $text = rtrim( $text ) . "\n\n-- \n";
                $text .= wfMsgExt(
                        'emailuserfooter',
                        array( 'content', 'parsemag' ),
                        array( $from->name, $to->name )
                );

                $error = '';
                if( !wfRunHooks( 'EmailUser', array( &$to, &$from, &$subject, &$text, &$error ) ) ) {
                        return $error;
                }

                if( $wgUserEmailUseReplyTo ) {
                        // Put the generic wiki autogenerated address in the From:
                        // header and reserve the user for Reply-To.
                        //
                        // This is a bit ugly, but will serve to differentiate
                        // wiki-borne mails from direct mails and protects against
                        // SPF and bounce problems with some mailers (see below).
                        global $wgPasswordSender, $wgPasswordSenderName;
                        $mailFrom = new MailAddress( $wgPasswordSender, $wgPasswordSenderName );
                        $replyTo = $from;
                } else {
                        // Put the sending user's e-mail address in the From: header.
                        //
                        // This is clean-looking and convenient, but has issues.
                        // One is that it doesn't as clearly differentiate the wiki mail
                        // from "directly" sent mails.
                        //
                        // Another is that some mailers (like sSMTP) will use the From
                        // address as the envelope sender as well. For open sites this
                        // can cause mails to be flunked for SPF violations (since the
                        // wiki server isn't an authorized sender for various users'
                        // domains) as well as creating a privacy issue as bounces
                        // containing the recipient's e-mail address may get sent to
                        // the sending user.
                        $mailFrom = $from;
                        $replyTo = null;
                }

                $status = UserMailer::send( $to, $mailFrom, $subject, $text, $replyTo );

                if( !$status->isGood() ) {
                        return $status;
                } else {
                        // if the user requested a copy of this mail, do this now,
                        // unless they are emailing themselves, in which case one
                        // copy of the message is sufficient.
                        if ( $data['CCMe'] && $to != $from ) {
                                $cc_subject = wfMsg(
                                        'emailccsubject',
                                        $target->getName(),
                                        $subject
                                );
                                wfRunHooks( 'EmailUserCC', array( &$from, &$from, &$cc_subject, &$text ) );
                                $ccStatus = UserMailer::send( $from, $from, $cc_subject, $text );
                                $status->merge( $ccStatus );
                        }

                        wfRunHooks( 'EmailUserComplete', array( $to, $from, $subject, $text ) );
                        return $status;
                }
        }
}