SpecialEmailUser.php

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<?php
namespace MediaWiki\Specials;
 
use MediaWiki\Exception\ErrorPageError;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Mail\EmailUserFactory;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Permissions\PermissionStatus;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Status\Status;
use MediaWiki\User\Options\UserOptionsLookup;
use MediaWiki\User\User;
use MediaWiki\User\UserFactory;
use MediaWiki\User\UserNamePrefixSearch;
use MediaWiki\User\UserNameUtils;
use StatusValue;
 
class SpecialEmailUser extends SpecialPage {
 
    public function __construct(
        private readonly UserNameUtils $userNameUtils,
        private readonly UserNamePrefixSearch $userNamePrefixSearch,
        private readonly UserOptionsLookup $userOptionsLookup,
        private readonly EmailUserFactory $emailUserFactory,
        private readonly UserFactory $userFactory,
    ) {
        parent::__construct( 'Emailuser' );
    }
 
    public function doesWrites() {
        return true;
    }
 
    public function getDescription() {
        return $this->msg( 'emailuser-title-notarget' );
    }
 
    protected function getFormFields( User $target ): array {
        $linkRenderer = $this->getLinkRenderer();
        $user = $this->getUser();
        return [
            'From' => [
                'type' => 'info',
                'raw' => 1,
                'default' => $linkRenderer->makeLink(
                    $user->getUserPage(),
                    $user->getName()
                ),
                'label-message' => 'emailfrom',
                'id' => 'mw-emailuser-sender',
            ],
            'To' => [
                'type' => 'info',
                'raw' => 1,
                'default' => $linkRenderer->makeLink(
                    $target->getUserPage(),
                    $target->getName()
                ),
                'label-message' => 'emailto',
                'id' => 'mw-emailuser-recipient',
            ],
            'Target' => [
                'type' => 'hidden',
                'default' => $target->getName(),
            ],
            'Subject' => [
                'type' => 'text',
                'default' => $this->msg( 'defemailsubject', $user->getName() )->inContentLanguage()->text(),
                'label-message' => 'emailsubject',
                'maxlength' => 200,
                'size' => 60,
                'required' => true,
            ],
            'Text' => [
                'type' => 'textarea',
                'rows' => 20,
                'label-message' => 'emailmessage',
                'required' => true,
            ],
            'CCMe' => [
                'type' => 'check',
                'label-message' => 'emailccme',
                'default' => $this->userOptionsLookup->getBoolOption( $user, 'ccmeonemails' ),
            ],
        ];
    }
 
    private function handleCanSendEmailStatus( StatusValue $status ): void {
        if ( !$status->isGood() ) {
            if ( $status instanceof PermissionStatus ) {
                $status->throwErrorPageError();
            } elseif ( $status->hasMessage( 'mailnologin' ) ) {
                throw new ErrorPageError( 'mailnologin', 'mailnologintext' );
            } elseif ( $status->hasMessage( 'usermaildisabled' ) ) {
                throw new ErrorPageError( 'usermaildisabled', 'usermaildisabledtext' );
            } elseif ( $status->getValue() !== null ) {
                // BC for deprecated hook errors
                // (to be removed when UserCanSendEmail and EmailUserPermissionsErrors are removed)
                $msg = $status->getMessages()[0];
                throw new ErrorPageError( $status->getValue(), $msg );
            } else {
                // Fallback in case new error types are added in EmailUser
                throw new ErrorPageError( $this->getDescription(), Status::wrap( $status )->getMessage() );
            }
        }
    }
 
    public function execute( $par ) {
        $this->setHeaders();
        $this->outputHeader();
 
        $out = $this->getOutput();
        $request = $this->getRequest();
        $out->addModuleStyles( 'mediawiki.special' );
 
        // Check if the user can send emails without authorizing the action.
        $emailUser = $this->emailUserFactory->newEmailUserBC(
            $this->getUser(),
            $this->getConfig()
        );
        $emailUser->setEditToken( (string)$request->getVal( 'wpEditToken' ) );
        $status = $emailUser->canSend();
 
        // If user emailing is disabled, then prioritise this error over anything else (including the
        // ::requireNamedUser check). This is because a user would still be unable access the form if they were to
        // log in or create account.
        if ( !$status->isGood() && $status->hasMessage( 'usermaildisabled' ) ) {
            $this->handleCanSendEmailStatus( $status );
        }
 
        // If the user is not logged into a named account, then display this error. This should redirect to
        // Special:UserLogin or Special:CreateAccount to not interrupt the flow.
        $this->requireNamedUser( 'mailnologintext', 'mailnologin' );
 
        $this->handleCanSendEmailStatus( $status );
 
        // Always go through the userform, it will do validations on the target
        // and display the emailform for us.
        $target = $par ?? $request->getVal( 'wpTarget', $request->getVal( 'target', '' ) );
        // @phan-suppress-next-line PhanTypeMismatchArgumentNullable Defaults to empty string
        $this->userForm( $target );
    }
 
    public static function getTarget( $target, User $sender ) {
        $targetObject = MediaWikiServices::getInstance()->getUserFactory()->newFromName( $target );
        if ( !$targetObject instanceof User ) {
            return 'notarget';
        }
 
        $status = MediaWikiServices::getInstance()->getEmailUserFactory()
            ->newEmailUser( $sender )
            ->validateTarget( $targetObject );
        if ( !$status->isGood() ) {
            $msg = $status->getMessages()[0]->getKey();
            $ret = $msg === 'emailnotarget' ? 'notarget' : preg_replace( '/text$/', '', $msg );
        } else {
            $ret = $targetObject;
        }
        return $ret;
    }
 
    protected function userForm( $name ) {
        $htmlForm = HTMLForm::factory( 'ooui', [
            'Target' => [
                'type' => 'user',
                'exists' => true,
                'required' => true,
                'label-message' => 'emailusername',
                'id' => 'emailusertarget',
                'autofocus' => true,
                // Exclude temporary accounts from the autocomplete, as they cannot have email addresses.
                'excludetemp' => true,
                // Skip validation when visit directly without subpage (T347854)
                'default' => '',
                // Prefill for subpage syntax and old target param.
                'filter-callback' => static function ( $value ) use ( $name ) {
                    return str_replace( '_', ' ',
                        ( $value !== '' && $value !== false && $value !== null ) ? $value : $name );
                },
                'validation-callback' => function ( $value ) {
                    // HTMLForm checked that this is a valid user name
                    $target = $this->userFactory->newFromName( $value );
                    $statusValue = $this->emailUserFactory
                        // @phan-suppress-next-line PhanTypeMismatchArgumentNullable
                        ->newEmailUser( $this->getUser() )->validateTarget( $target );
                    if ( !$statusValue->isGood() ) {
                        // TODO: Return Status instead of StatusValue from validateTarget() method?
                        return Status::wrap( $statusValue )->getMessage();
                    }
                    return true;
                }
            ]
        ], $this->getContext() );
 
        $htmlForm
            ->setMethod( 'GET' )
            ->setTitle( $this->getPageTitle() ) // Remove subpage
            ->setSubmitCallback( $this->sendEmailForm( ... ) )
            ->setId( 'askusername' )
            ->setWrapperLegendMsg( 'emailtarget' )
            ->setSubmitTextMsg( 'emailusernamesubmit' )
            ->show();
    }
 
    private function sendEmailForm( array $data ) {
        $out = $this->getOutput();
 
        // HTMLForm checked that this is a valid user name, the return value can never be null.
        $target = $this->userFactory->newFromName( $data['Target'] );
        // @phan-suppress-next-line PhanTypeMismatchArgumentNullable
        $htmlForm = HTMLForm::factory( 'ooui', $this->getFormFields( $target ), $this->getContext() );
        $htmlForm
            ->setTitle( $this->getPageTitle() ) // Remove subpage
            ->addPreHtml( $this->msg( 'emailpagetext', $target->getName() )->parse() )
            ->setSubmitTextMsg( 'emailsend' )
            ->setSubmitCallback( $this->onFormSubmit( ... ) )
            ->setWrapperLegendMsg( 'email-legend' )
            ->prepareForm();
 
        if ( !$this->getHookRunner()->onEmailUserForm( $htmlForm ) ) {
            return false;
        }
 
        $result = $htmlForm->show();
 
        if ( $result === true || ( $result instanceof Status && $result->isGood() ) ) {
            $out->setPageTitleMsg( $this->msg( 'emailsent' ) );
            $out->addWikiMsg( 'emailsenttext', $target->getName() );
            $out->returnToMain( false, $target->getUserPage() );
        } else {
            $out->setPageTitleMsg( $this->msg( 'emailuser-title-target', $target->getName() ) );
        }
        return true;
    }
 
    private function onFormSubmit( array $data ) {
        // HTMLForm checked that this is a valid user name, the return value can never be null.
        $target = $this->userFactory->newFromName( $data['Target'] );
 
        $emailUser = $this->emailUserFactory->newEmailUser( $this->getAuthority() );
        $emailUser->setEditToken( $this->getRequest()->getVal( 'wpEditToken' ) );
 
        // Fully authorize on sending emails.
        $status = $emailUser->authorizeSend();
 
        if ( !$status->isOK() ) {
            return $status;
        }
 
        // @phan-suppress-next-next-line PhanTypeMismatchArgumentNullable
        $res = $emailUser->sendEmailUnsafe(
            $target,
            $data['Subject'],
            $data['Text'],
            $data['CCMe'],
            $this->getLanguage()->getCode()
        );
        if ( $res->hasMessage( 'hookaborted' ) ) {
            // BC: The method could previously return false if the EmailUser hook set the error to false. Preserve
            // that behaviour until we replace the hook.
            $res = false;
        } else {
            $res = Status::wrap( $res );
        }
        return $res;
    }
 
    public function prefixSearchSubpages( $search, $limit, $offset ) {
        $search = $this->userNameUtils->getCanonical( $search );
        if ( !$search ) {
            // No prefix suggestion for invalid user
            return [];
        }
        // Autocomplete subpage as user list - public to allow caching
        return $this->userNamePrefixSearch
            ->search( UserNamePrefixSearch::AUDIENCE_PUBLIC, $search, $limit, $offset );
    }
 
    public function isListed() {
        return $this->getConfig()->get( MainConfigNames::EnableUserEmail );
    }
 
    protected function getGroupName() {
        return 'users';
    }
}
 
class_alias( SpecialEmailUser::class, 'SpecialEmailUser' );