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1<?php
2/**
3 * File reversion user interface
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
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
18 *
19 * @file
20 * @ingroup Actions
21 * @ingroup Media
22 * @author Alexandre Emsenhuber
23 * @author Rob Church <robchur@gmail.com>
24 */
25
26use MediaWiki\Context\IContextSource;
27use MediaWiki\HTMLForm\HTMLForm;
28use MediaWiki\Language\Language;
29use MediaWiki\MediaWikiServices;
30use MediaWiki\Output\OutputPage;
31use MediaWiki\Status\Status;
32use MediaWiki\User\User;
33use MediaWiki\Utils\MWTimestamp;
34
35/**
36 * File reversion user interface
37 * WikiPage must contain getFile method: \WikiFilePage
38 * Article::getFile is only for b/c: \ImagePage
39 *
40 * @ingroup Actions
41 */
42class RevertAction extends FormAction {
43
44    private Language $contentLanguage;
45    private RepoGroup $repoGroup;
46
47    /**
48     * @param Article $article
49     * @param IContextSource $context
50     * @param Language $contentLanguage
51     * @param RepoGroup $repoGroup
52     */
53    public function __construct(
54        Article $article,
55        IContextSource $context,
56        Language $contentLanguage,
57        RepoGroup $repoGroup
58    ) {
59        parent::__construct( $article, $context );
60        $this->contentLanguage = $contentLanguage;
61        $this->repoGroup = $repoGroup;
62    }
63
64    /**
65     * @var OldLocalFile
66     */
67    protected $oldFile;
68
69    public function getName() {
70        return 'revert';
71    }
72
73    public function getRestriction() {
74        return 'upload';
75    }
76
77    protected function checkCanExecute( User $user ) {
78        if ( $this->getTitle()->getNamespace() !== NS_FILE ) {
79            throw new ErrorPageError( $this->msg( 'nosuchaction' ), $this->msg( 'nosuchactiontext' ) );
80        }
81        parent::checkCanExecute( $user );
82
83        $oldimage = $this->getRequest()->getText( 'oldimage' );
84        if ( strlen( $oldimage ) < 16
85            || strpos( $oldimage, '/' ) !== false
86            || strpos( $oldimage, '\\' ) !== false
87        ) {
88            throw new ErrorPageError( 'internalerror', 'unexpected', [ 'oldimage', $oldimage ] );
89        }
90
91        $this->oldFile = $this->repoGroup->getLocalRepo()
92            ->newFromArchiveName( $this->getTitle(), $oldimage );
93
94        if ( !$this->oldFile->exists() ) {
95            throw new ErrorPageError( '', 'filerevert-badversion' );
96        }
97    }
98
99    protected function usesOOUI() {
100        return true;
101    }
102
103    protected function alterForm( HTMLForm $form ) {
104        $form->setWrapperLegendMsg( 'filerevert-legend' );
105        $form->setSubmitTextMsg( 'filerevert-submit' );
106        $form->addHiddenField( 'oldimage', $this->getRequest()->getText( 'oldimage' ) );
107        $form->setTokenSalt( [ 'revert', $this->getTitle()->getPrefixedDBkey() ] );
108    }
109
110    protected function getFormFields() {
111        $timestamp = $this->oldFile->getTimestamp();
112
113        $user = $this->getUser();
114        $lang = $this->getLanguage();
115        $userDate = $lang->userDate( $timestamp, $user );
116        $userTime = $lang->userTime( $timestamp, $user );
117        $siteTs = MWTimestamp::getLocalInstance( $timestamp );
118        $ts = $siteTs->format( 'YmdHis' );
119        $contLang = $this->contentLanguage;
120        $siteDate = $contLang->date( $ts, false, false );
121        $siteTime = $contLang->time( $ts, false, false );
122        $tzMsg = $siteTs->getTimezoneMessage()->inContentLanguage()->text();
123
124        return [
125            'intro' => [
126                'type' => 'info',
127                'raw' => true,
128                'default' => $this->msg( 'filerevert-intro',
129                    $this->getTitle()->getText(), $userDate, $userTime,
130                    (string)MediaWikiServices::getInstance()->getUrlUtils()->expand(
131                        $this->getFile()
132                            ->getArchiveUrl(
133                                $this->getRequest()->getText( 'oldimage' )
134                            ),
135                        PROTO_CURRENT
136                    ) )->parseAsBlock()
137            ],
138            'comment' => [
139                'type' => 'text',
140                'label-message' => 'filerevert-comment',
141                'default' => $this->msg( 'filerevert-defaultcomment', $siteDate, $siteTime,
142                    $tzMsg )->inContentLanguage()->text()
143            ]
144        ];
145    }
146
147    public function onSubmit( $data ) {
148        $this->useTransactionalTimeLimit();
149
150        $old = $this->getRequest()->getText( 'oldimage' );
151        /** @var LocalFile $localFile */
152        $localFile = $this->getFile();
153        '@phan-var LocalFile $localFile';
154        $oldFile = OldLocalFile::newFromArchiveName( $this->getTitle(), $localFile->getRepo(), $old );
155
156        $source = $localFile->getArchiveVirtualUrl( $old );
157        $comment = $data['comment'];
158
159        if ( $localFile->getSha1() === $oldFile->getSha1() ) {
160            return Status::newFatal( 'filerevert-identical' );
161        }
162
163        // TODO: Preserve file properties from database instead of reloading from file
164        return $localFile->upload(
165            $source,
166            $comment,
167            $comment,
168            0,
169            false,
170            false,
171            $this->getAuthority(),
172            [],
173            true,
174            true
175        );
176    }
177
178    public function onSuccess() {
179        $timestamp = $this->oldFile->getTimestamp();
180        $user = $this->getUser();
181        $lang = $this->getLanguage();
182        $userDate = $lang->userDate( $timestamp, $user );
183        $userTime = $lang->userTime( $timestamp, $user );
184
185        $this->getOutput()->addWikiMsg( 'filerevert-success', $this->getTitle()->getText(),
186            $userDate, $userTime,
187            (string)MediaWikiServices::getInstance()->getUrlUtils()->expand(
188                $this->getFile()
189                    ->getArchiveUrl(
190                        $this->getRequest()->getText( 'oldimage' )
191                    ),
192                PROTO_CURRENT
193            ) );
194        $this->getOutput()->returnToMain( false, $this->getTitle() );
195    }
196
197    protected function getPageTitle() {
198        return $this->msg( 'filerevert' )->plaintextParams( $this->getTitle()->getText() );
199    }
200
201    protected function getDescription() {
202        return OutputPage::buildBacklinkSubtitle( $this->getTitle() )->escaped();
203    }
204
205    public function doesWrites() {
206        return true;
207    }
208
209    /**
210     * @since 1.35
211     * @return File
212     */
213    private function getFile(): File {
214        /** @var \WikiFilePage $wikiPage */
215        $wikiPage = $this->getWikiPage();
216        // @phan-suppress-next-line PhanUndeclaredMethod
217        return $wikiPage->getFile();
218    }
219}