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1<?php
2/**
3 * Copyright © 2012 Szymon Świerkosz beau@adres.pl
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 */
22
23namespace MediaWiki\Api;
24
25use MediaWiki\HTMLForm\HTMLForm;
26use MediaWiki\Logger\LoggerFactory;
27use MediaWiki\Message\Message;
28use MediaWiki\Preferences\DefaultPreferencesFactory;
29use MediaWiki\Preferences\PreferencesFactory;
30use MediaWiki\User\Options\UserOptionsManager;
31use MediaWiki\User\User;
32use Wikimedia\ParamValidator\ParamValidator;
33
34/**
35 * The base class for core's ApiOptions and two modules in the GlobalPreferences
36 * extension.
37 *
38 * @ingroup API
39 */
40abstract class ApiOptionsBase extends ApiBase {
41    /** @var User User account to modify */
42    private $userForUpdates;
43
44    private UserOptionsManager $userOptionsManager;
45    private PreferencesFactory $preferencesFactory;
46
47    /** @var mixed[][]|null */
48    private $preferences;
49
50    /** @var HTMLForm|null */
51    private $htmlForm;
52
53    /** @var string[]|null */
54    private $prefsKinds;
55
56    public function __construct(
57        ApiMain $main,
58        string $action,
59        UserOptionsManager $userOptionsManager,
60        PreferencesFactory $preferencesFactory
61    ) {
62        parent::__construct( $main, $action );
63        $this->userOptionsManager = $userOptionsManager;
64        $this->preferencesFactory = $preferencesFactory;
65    }
66
67    /**
68     * Changes preferences of the current user.
69     */
70    public function execute() {
71        $user = $this->getUserForUpdatesOrNull();
72        if ( !$user || !$user->isNamed() ) {
73            $this->dieWithError(
74                [ 'apierror-mustbeloggedin', $this->msg( 'action-editmyoptions' ) ], 'notloggedin'
75            );
76        }
77
78        $this->checkUserRightsAny( 'editmyoptions' );
79
80        $params = $this->extractRequestParams();
81        $changed = false;
82
83        if ( isset( $params['optionvalue'] ) && !isset( $params['optionname'] ) ) {
84            $this->dieWithError( [ 'apierror-missingparam', 'optionname' ] );
85        }
86
87        $resetKinds = $params['resetkinds'];
88        if ( !$params['reset'] ) {
89            $resetKinds = [];
90        }
91
92        $changes = [];
93        if ( $params['change'] ) {
94            foreach ( $params['change'] as $entry ) {
95                $array = explode( '=', $entry, 2 );
96                $changes[$array[0]] = $array[1] ?? null;
97            }
98        }
99        if ( isset( $params['optionname'] ) ) {
100            $newValue = $params['optionvalue'] ?? null;
101            $changes[$params['optionname']] = $newValue;
102        }
103
104        $this->runHook( $user, $changes, $resetKinds );
105
106        if ( $resetKinds ) {
107            $this->resetPreferences( $resetKinds );
108            $changed = true;
109        }
110
111        if ( !$changed && !count( $changes ) ) {
112            $this->dieWithError( 'apierror-nochanges' );
113        }
114
115        $this->prefsKinds = $this->preferencesFactory->getResetKinds( $user, $this->getContext(), $changes );
116
117        foreach ( $changes as $key => $value ) {
118            if ( $this->shouldIgnoreKey( $key ) ) {
119                continue;
120            }
121            $validation = $this->validate( $key, $value );
122            if ( $validation === true ) {
123                $this->setPreference( $key, $value );
124                $changed = true;
125            } else {
126                $this->addWarning( [ 'apiwarn-validationfailed', wfEscapeWikiText( $key ), $validation ] );
127            }
128        }
129
130        if ( $changed ) {
131            $this->commitChanges();
132        }
133
134        $this->getResult()->addValue( null, $this->getModuleName(), 'success' );
135    }
136
137    /**
138     * Run the ApiOptions hook if applicable
139     *
140     * @param User $user
141     * @param string[] $changes
142     * @param string[] $resetKinds
143     */
144    protected function runHook( $user, $changes, $resetKinds ) {
145    }
146
147    /**
148     * Check whether a key should be ignored.
149     *
150     * This may be overridden to emit a warning as well as returning true.
151     *
152     * @param string $key
153     * @return bool
154     */
155    protected function shouldIgnoreKey( $key ) {
156        return false;
157    }
158
159    /**
160     * Get the preference kinds for the current user's options.
161     * This can only be called after $this->prefsKinds is set in execute()
162     *
163     * @return string[]
164     */
165    protected function getPrefsKinds(): array {
166        return $this->prefsKinds;
167    }
168
169    /**
170     * Get the HTMLForm for the user's preferences
171     *
172     * @return HTMLForm
173     */
174    protected function getHtmlForm() {
175        if ( !$this->htmlForm ) {
176            $this->htmlForm = new HTMLForm(
177                DefaultPreferencesFactory::simplifyFormDescriptor( $this->getPreferences() ),
178                $this
179            );
180        }
181        return $this->htmlForm;
182    }
183
184    /**
185     * Validate a proposed change
186     *
187     * @param string $key
188     * @param mixed &$value
189     * @return bool|\MediaWiki\Message\Message|string
190     */
191    protected function validate( $key, &$value ) {
192        switch ( $this->getPrefsKinds()[$key] ) {
193            case 'registered':
194                // Regular option.
195                if ( $value === null ) {
196                    // Reset it
197                    $validation = true;
198                } else {
199                    // Validate
200                    $field = $this->getHtmlForm()->getField( $key );
201                    $validation = $field->validate(
202                        $value,
203                        $this->userOptionsManager->getOptions( $this->getUserForUpdates() )
204                    );
205                }
206                break;
207            case 'registered-multiselect':
208            case 'registered-checkmatrix':
209                // A key for a multiselect or checkmatrix option.
210                // TODO: Apply validation properly.
211                $validation = true;
212                $value = $value !== null ? (bool)$value : null;
213                break;
214            case 'userjs':
215                // Allow non-default preferences prefixed with 'userjs-', to be set by user scripts
216                if ( strlen( $key ) > 255 ) {
217                    $validation = $this->msg( 'apiwarn-validationfailed-keytoolong', Message::numParam( 255 ) );
218                } elseif ( preg_match( '/[^a-zA-Z0-9_-]/', $key ) !== 0 ) {
219                    $validation = $this->msg( 'apiwarn-validationfailed-badchars' );
220                } else {
221                    $validation = true;
222                }
223
224                LoggerFactory::getInstance( 'api-warning' )->info(
225                    'ApiOptions: Setting userjs option',
226                    [
227                        'phab' => 'T259073',
228                        'OptionName' => substr( $key, 0, 255 ),
229                        'OptionValue' => substr( $value ?? '', 0, 255 ),
230                        'OptionSize' => strlen( $value ?? '' ),
231                        'OptionValidation' => $validation,
232                        'UserId' => $this->getUserForUpdates()->getId(),
233                        'RequestIP' => $this->getRequest()->getIP(),
234                        'RequestUA' => $this->getRequest()->getHeader( 'User-Agent' )
235                    ]
236                );
237                break;
238            case 'special':
239                $validation = $this->msg( 'apiwarn-validationfailed-cannotset' );
240                break;
241            case 'unused':
242            default:
243                $validation = $this->msg( 'apiwarn-validationfailed-badpref' );
244                break;
245        }
246        if ( $validation === true && is_string( $value ) &&
247            strlen( $value ) > UserOptionsManager::MAX_BYTES_OPTION_VALUE
248        ) {
249            $validation = $this->msg(
250                'apiwarn-validationfailed-valuetoolong',
251                Message::numParam( UserOptionsManager::MAX_BYTES_OPTION_VALUE )
252            );
253        }
254        return $validation;
255    }
256
257    /**
258     * Load the user from the primary to reduce CAS errors on double post (T95839)
259     * Will throw if the user is anonymous.
260     */
261    protected function getUserForUpdates(): User {
262        // @phan-suppress-next-line PhanTypeMismatchReturnNullable
263        return $this->getUserForUpdatesOrNull();
264    }
265
266    /**
267     * Get the user for updates, or null if the user is anonymous
268     *
269     * @return User|null
270     */
271    protected function getUserForUpdatesOrNull(): ?User {
272        if ( !$this->userForUpdates ) {
273            $this->userForUpdates = $this->getUser()->getInstanceForUpdate();
274        }
275
276        return $this->userForUpdates;
277    }
278
279    /**
280     * Returns preferences form descriptor
281     * @return mixed[][]
282     */
283    protected function getPreferences() {
284        if ( !$this->preferences ) {
285            $this->preferences = $this->preferencesFactory->getFormDescriptor(
286                $this->getUserForUpdates(),
287                $this->getContext()
288            );
289        }
290        return $this->preferences;
291    }
292
293    protected function getUserOptionsManager(): UserOptionsManager {
294        return $this->userOptionsManager;
295    }
296
297    protected function getPreferencesFactory(): PreferencesFactory {
298        return $this->preferencesFactory;
299    }
300
301    /**
302     * Reset preferences of the specified kinds
303     *
304     * @param string[] $kinds One or more types returned by PreferencesFactory::listResetKinds() or 'all'
305     */
306    abstract protected function resetPreferences( array $kinds );
307
308    /**
309     * Sets one user preference to be applied by commitChanges()
310     *
311     * @param string $preference
312     * @param mixed $value
313     */
314    abstract protected function setPreference( $preference, $value );
315
316    /**
317     * Applies changes to user preferences
318     */
319    abstract protected function commitChanges();
320
321    public function mustBePosted() {
322        return true;
323    }
324
325    public function isWriteMode() {
326        return true;
327    }
328
329    public function getAllowedParams() {
330        $optionKinds = $this->preferencesFactory->listResetKinds();
331        $optionKinds[] = 'all';
332
333        return [
334            'reset' => false,
335            'resetkinds' => [
336                ParamValidator::PARAM_TYPE => $optionKinds,
337                ParamValidator::PARAM_DEFAULT => 'all',
338                ParamValidator::PARAM_ISMULTI => true
339            ],
340            'change' => [
341                ParamValidator::PARAM_ISMULTI => true,
342            ],
343            'optionname' => [
344                ParamValidator::PARAM_TYPE => 'string',
345            ],
346            'optionvalue' => [
347                ParamValidator::PARAM_TYPE => 'string',
348            ],
349        ];
350    }
351
352    public function needsToken() {
353        return 'csrf';
354    }
355}
356
357/** @deprecated class alias since 1.43 */
358class_alias( ApiOptionsBase::class, 'ApiOptionsBase' );