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| 1 | <?php |
| 2 | /** |
| 3 | * Base classes for actions done on pages. |
| 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 | */ |
| 22 | |
| 23 | use MediaWiki\Status\Status; |
| 24 | |
| 25 | /** |
| 26 | * An action which shows a form and does something based on the input from the form |
| 27 | * |
| 28 | * @stable to extend |
| 29 | * |
| 30 | * @ingroup Actions |
| 31 | */ |
| 32 | abstract class FormAction extends Action { |
| 33 | |
| 34 | /** |
| 35 | * Get an HTMLForm descriptor array |
| 36 | * @stable to override |
| 37 | * @return array |
| 38 | */ |
| 39 | protected function getFormFields() { |
| 40 | // Default to an empty form with just a submit button |
| 41 | return []; |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Add pre- or post-text to the form |
| 46 | * @stable to override |
| 47 | * @return string HTML which will be sent to $form->addPreText() |
| 48 | */ |
| 49 | protected function preText() { |
| 50 | return ''; |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * @stable to override |
| 55 | * @return string |
| 56 | */ |
| 57 | protected function postText() { |
| 58 | return ''; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Play with the HTMLForm if you need to more substantially |
| 63 | * @stable to override |
| 64 | * @param HTMLForm $form |
| 65 | */ |
| 66 | protected function alterForm( HTMLForm $form ) { |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Whether the form should use OOUI |
| 71 | * @stable to override |
| 72 | * @return bool |
| 73 | */ |
| 74 | protected function usesOOUI() { |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Get the HTMLForm to control behavior |
| 80 | * @stable to override |
| 81 | * @return HTMLForm |
| 82 | */ |
| 83 | protected function getForm() { |
| 84 | $this->fields = $this->getFormFields(); |
| 85 | |
| 86 | // Give hooks a chance to alter the form, adding extra fields or text etc |
| 87 | $this->getHookRunner()->onActionModifyFormFields( |
| 88 | $this->getName(), |
| 89 | $this->fields, |
| 90 | $this->getArticle() |
| 91 | ); |
| 92 | |
| 93 | if ( $this->usesOOUI() ) { |
| 94 | $form = HTMLForm::factory( 'ooui', $this->fields, $this->getContext(), $this->getName() ); |
| 95 | } else { |
| 96 | $form = new HTMLForm( $this->fields, $this->getContext(), $this->getName() ); |
| 97 | } |
| 98 | $form->setSubmitCallback( [ $this, 'onSubmit' ] ); |
| 99 | |
| 100 | $title = $this->getTitle(); |
| 101 | $form->setAction( $title->getLocalURL( [ 'action' => $this->getName() ] ) ); |
| 102 | // Retain query parameters (uselang etc) |
| 103 | $params = array_diff_key( |
| 104 | $this->getRequest()->getQueryValues(), |
| 105 | [ 'action' => null, 'title' => null ] |
| 106 | ); |
| 107 | if ( $params ) { |
| 108 | $form->addHiddenField( 'redirectparams', wfArrayToCgi( $params ) ); |
| 109 | } |
| 110 | |
| 111 | $form->addPreText( $this->preText() ); |
| 112 | $form->addPostText( $this->postText() ); |
| 113 | $this->alterForm( $form ); |
| 114 | |
| 115 | // Give hooks a chance to alter the form, adding extra fields or text etc |
| 116 | $this->getHookRunner()->onActionBeforeFormDisplay( |
| 117 | $this->getName(), |
| 118 | $form, |
| 119 | $this->getArticle() |
| 120 | ); |
| 121 | |
| 122 | return $form; |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Process the form on POST submission. |
| 127 | * |
| 128 | * If you don't want to do anything with the form, just return false here. |
| 129 | * |
| 130 | * This method will be passed to the HTMLForm as a submit callback (see |
| 131 | * HTMLForm::setSubmitCallback) and must return as documented for HTMLForm::trySubmit. |
| 132 | * |
| 133 | * @see HTMLForm::setSubmitCallback() |
| 134 | * @see HTMLForm::trySubmit() |
| 135 | * @param array $data |
| 136 | * @return bool|string|array|Status Must return as documented for HTMLForm::trySubmit |
| 137 | */ |
| 138 | abstract public function onSubmit( $data ); |
| 139 | |
| 140 | /** |
| 141 | * Do something exciting on successful processing of the form. This might be to show |
| 142 | * a confirmation message (watch, rollback, etc) or to redirect somewhere else (edit, |
| 143 | * protect, etc). |
| 144 | */ |
| 145 | abstract public function onSuccess(); |
| 146 | |
| 147 | /** |
| 148 | * The basic pattern for actions is to display some sort of HTMLForm UI, maybe with |
| 149 | * some stuff underneath (history etc); to do some processing on submission of that |
| 150 | * form (delete, protect, etc) and to do something exciting on 'success', be that |
| 151 | * display something new or redirect to somewhere. Some actions have more exotic |
| 152 | * behavior, but that's what subclassing is for :D |
| 153 | * @stable to override |
| 154 | */ |
| 155 | public function show() { |
| 156 | $this->setHeaders(); |
| 157 | |
| 158 | // This will throw exceptions if there's a problem |
| 159 | $this->checkCanExecute( $this->getUser() ); |
| 160 | |
| 161 | $form = $this->getForm(); |
| 162 | if ( $form->show() ) { |
| 163 | $this->onSuccess(); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * @stable to override |
| 169 | * @return bool |
| 170 | */ |
| 171 | public function doesWrites() { |
| 172 | return true; |
| 173 | } |
| 174 | } |