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| 1 | <?php |
| 2 | /** |
| 3 | * Special page which uses an HTMLForm to handle processing. |
| 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 | namespace MediaWiki\SpecialPage; |
| 25 | |
| 26 | use MediaWiki\Context\DerivativeContext; |
| 27 | use MediaWiki\HTMLForm\HTMLForm; |
| 28 | use MediaWiki\Request\DerivativeRequest; |
| 29 | use MediaWiki\Status\Status; |
| 30 | use MediaWiki\User\User; |
| 31 | use UserBlockedError; |
| 32 | |
| 33 | /** |
| 34 | * Special page which uses an HTMLForm to handle processing. This is mostly a |
| 35 | * clone of FormAction. More special pages should be built this way; maybe this could be |
| 36 | * a new structure for SpecialPages. |
| 37 | * |
| 38 | * @ingroup SpecialPage |
| 39 | */ |
| 40 | abstract class FormSpecialPage extends SpecialPage { |
| 41 | /** |
| 42 | * The sub-page of the special page. |
| 43 | * @var string|null |
| 44 | */ |
| 45 | protected $par = null; |
| 46 | |
| 47 | /** |
| 48 | * @var array|null POST data preserved across re-authentication |
| 49 | * @since 1.32 |
| 50 | */ |
| 51 | protected $reauthPostData = null; |
| 52 | |
| 53 | /** |
| 54 | * Get an HTMLForm descriptor array |
| 55 | * @return array |
| 56 | */ |
| 57 | abstract protected function getFormFields(); |
| 58 | |
| 59 | /** |
| 60 | * Add pre-HTML to the form |
| 61 | * @return string HTML which will be sent to $form->addPreHtml() |
| 62 | * @since 1.38 |
| 63 | */ |
| 64 | protected function preHtml() { |
| 65 | return ''; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Add post-HTML to the form |
| 70 | * @return string HTML which will be sent to $form->addPostHtml() |
| 71 | * @since 1.38 |
| 72 | */ |
| 73 | protected function postHtml() { |
| 74 | return ''; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Add pre-text to the form |
| 79 | * @return string HTML which will be sent to $form->addPreText() |
| 80 | * @deprecated since 1.38, use preHtml() instead |
| 81 | */ |
| 82 | protected function preText() { |
| 83 | return $this->preHtml(); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Add post-text to the form |
| 88 | * @return string HTML which will be sent to $form->addPostText() |
| 89 | * @deprecated since 1.38, use postHtml() instead |
| 90 | */ |
| 91 | protected function postText() { |
| 92 | return $this->postHtml(); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Play with the HTMLForm if you need to more substantially |
| 97 | * @param HTMLForm $form |
| 98 | */ |
| 99 | protected function alterForm( HTMLForm $form ) { |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Get message prefix for HTMLForm |
| 104 | * |
| 105 | * @since 1.21 |
| 106 | * @return string |
| 107 | */ |
| 108 | protected function getMessagePrefix() { |
| 109 | return strtolower( $this->getName() ); |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * Get display format for the form. See HTMLForm documentation for available values. |
| 114 | * |
| 115 | * @since 1.25 |
| 116 | * @return string |
| 117 | */ |
| 118 | protected function getDisplayFormat() { |
| 119 | return 'table'; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Get the HTMLForm to control behavior |
| 124 | * @return HTMLForm|null |
| 125 | */ |
| 126 | protected function getForm() { |
| 127 | $context = $this->getContext(); |
| 128 | $onSubmit = [ $this, 'onSubmit' ]; |
| 129 | |
| 130 | if ( $this->reauthPostData ) { |
| 131 | // Restore POST data |
| 132 | $context = new DerivativeContext( $context ); |
| 133 | $oldRequest = $this->getRequest(); |
| 134 | $context->setRequest( new DerivativeRequest( |
| 135 | $oldRequest, $this->reauthPostData + $oldRequest->getQueryValues(), true |
| 136 | ) ); |
| 137 | |
| 138 | // But don't treat it as a "real" submission just in case of some |
| 139 | // crazy kind of CSRF. |
| 140 | $onSubmit = static function () { |
| 141 | return false; |
| 142 | }; |
| 143 | } |
| 144 | |
| 145 | $form = HTMLForm::factory( |
| 146 | $this->getDisplayFormat(), |
| 147 | $this->getFormFields(), |
| 148 | $context, |
| 149 | $this->getMessagePrefix() |
| 150 | ); |
| 151 | if ( !$this->requiresPost() ) { |
| 152 | $form->setMethod( 'get' ); |
| 153 | } |
| 154 | $form->setSubmitCallback( $onSubmit ); |
| 155 | if ( $this->getDisplayFormat() !== 'ooui' ) { |
| 156 | // No legend and wrapper by default in OOUI forms, but can be set manually |
| 157 | // from alterForm() |
| 158 | $form->setWrapperLegendMsg( $this->getMessagePrefix() . '-legend' ); |
| 159 | } |
| 160 | |
| 161 | $headerMsg = $this->msg( $this->getMessagePrefix() . '-text' ); |
| 162 | if ( !$headerMsg->isDisabled() ) { |
| 163 | $form->addHeaderText( $headerMsg->parseAsBlock() ); |
| 164 | } |
| 165 | |
| 166 | // preText / postText are deprecated, but we need to keep calling them until the end of |
| 167 | // the deprecation process so a subclass overriding *Text and *Html both work |
| 168 | $form->addPreText( $this->preText() ); |
| 169 | $form->addPostText( $this->postText() ); |
| 170 | |
| 171 | // Give precedence to subpage syntax |
| 172 | $field = $this->getSubpageField(); |
| 173 | if ( $this->par && $field ) { |
| 174 | $this->getRequest()->setVal( $form->getField( $field )->getName(), $this->par ); |
| 175 | $form->setTitle( $this->getPageTitle() ); |
| 176 | } |
| 177 | $this->alterForm( $form ); |
| 178 | if ( $form->getMethod() == 'post' ) { |
| 179 | // Retain query parameters (uselang etc) on POST requests |
| 180 | $params = array_diff_key( |
| 181 | $this->getRequest()->getQueryValues(), [ 'title' => null ] ); |
| 182 | $form->addHiddenField( 'redirectparams', wfArrayToCgi( $params ) ); |
| 183 | } |
| 184 | |
| 185 | // Give hooks a chance to alter the form, adding extra fields or text etc |
| 186 | $this->getHookRunner()->onSpecialPageBeforeFormDisplay( $this->getName(), $form ); |
| 187 | |
| 188 | return $form; |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Process the form on submission. |
| 193 | * @phpcs:disable MediaWiki.Commenting.FunctionComment.ExtraParamComment |
| 194 | * @param array $data |
| 195 | * @param HTMLForm|null $form |
| 196 | * @suppress PhanCommentParamWithoutRealParam Many implementations don't have $form |
| 197 | * @return bool|string|array|Status As documented for HTMLForm::trySubmit. |
| 198 | * @phpcs:enable MediaWiki.Commenting.FunctionComment.ExtraParamComment |
| 199 | */ |
| 200 | abstract public function onSubmit( array $data /* HTMLForm $form = null */ ); |
| 201 | |
| 202 | /** |
| 203 | * Do something exciting on successful processing of the form, most likely to show a |
| 204 | * confirmation message |
| 205 | * @since 1.22 Default is to do nothing |
| 206 | */ |
| 207 | public function onSuccess() { |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * Basic SpecialPage workflow: get a form, send it to the user; get some data back, |
| 212 | * |
| 213 | * @param string|null $par Subpage string if one was specified |
| 214 | */ |
| 215 | public function execute( $par ) { |
| 216 | $this->setParameter( $par ); |
| 217 | $this->setHeaders(); |
| 218 | $this->outputHeader(); |
| 219 | |
| 220 | // This will throw exceptions if there's a problem |
| 221 | $this->checkExecutePermissions( $this->getUser() ); |
| 222 | |
| 223 | $securityLevel = $this->getLoginSecurityLevel(); |
| 224 | if ( $securityLevel !== false && !$this->checkLoginSecurityLevel( $securityLevel ) ) { |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | $form = $this->getForm(); |
| 229 | // GET forms can be set as includable |
| 230 | if ( !$this->including() ) { |
| 231 | $result = $this->getShowAlways() ? $form->showAlways() : $form->show(); |
| 232 | } else { |
| 233 | $result = $form->prepareForm()->tryAuthorizedSubmit(); |
| 234 | } |
| 235 | if ( $result === true || ( $result instanceof Status && $result->isGood() ) ) { |
| 236 | $this->onSuccess(); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * Whether the form should always be shown despite the success of submission. |
| 242 | * @since 1.40 |
| 243 | * @return bool |
| 244 | */ |
| 245 | protected function getShowAlways() { |
| 246 | return false; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Maybe do something interesting with the subpage parameter |
| 251 | * @param string|null $par |
| 252 | */ |
| 253 | protected function setParameter( $par ) { |
| 254 | $this->par = $par; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Override this function to set the field name used in the subpage syntax. |
| 259 | * @since 1.40 |
| 260 | * @return false|string |
| 261 | */ |
| 262 | protected function getSubpageField() { |
| 263 | return false; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Called from execute() to check if the given user can perform this action. |
| 268 | * Failures here must throw subclasses of ErrorPageError. |
| 269 | * @param User $user |
| 270 | * @throws UserBlockedError |
| 271 | */ |
| 272 | protected function checkExecutePermissions( User $user ) { |
| 273 | $this->checkPermissions(); |
| 274 | |
| 275 | if ( $this->requiresUnblock() ) { |
| 276 | $block = $user->getBlock(); |
| 277 | if ( $block && $block->isSitewide() ) { |
| 278 | throw new UserBlockedError( |
| 279 | $block, |
| 280 | $user, |
| 281 | $this->getLanguage(), |
| 282 | $this->getRequest()->getIP() |
| 283 | ); |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | if ( $this->requiresWrite() ) { |
| 288 | $this->checkReadOnly(); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Whether this action should using POST method to submit, default to true |
| 294 | * @since 1.40 |
| 295 | * @return bool |
| 296 | */ |
| 297 | public function requiresPost() { |
| 298 | return true; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Whether this action requires the wiki not to be locked, default to requiresPost() |
| 303 | * @return bool |
| 304 | */ |
| 305 | public function requiresWrite() { |
| 306 | return $this->requiresPost(); |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * Whether this action cannot be executed by a blocked user, default to requiresPost() |
| 311 | * @return bool |
| 312 | */ |
| 313 | public function requiresUnblock() { |
| 314 | return $this->requiresPost(); |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Preserve POST data across reauthentication |
| 319 | * |
| 320 | * @since 1.32 |
| 321 | * @param array $data |
| 322 | */ |
| 323 | protected function setReauthPostData( array $data ) { |
| 324 | $this->reauthPostData = $data; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | /** @deprecated class alias since 1.41 */ |
| 329 | class_alias( FormSpecialPage::class, 'FormSpecialPage' ); |