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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * A special page that redirects to a workflow or PostRevision given a UUID |
| 5 | */ |
| 6 | |
| 7 | namespace Flow\Specials; |
| 8 | |
| 9 | use Flow\Container; |
| 10 | use Flow\Data\ObjectManager; |
| 11 | use Flow\Exception\FlowException; |
| 12 | use Flow\Model\UUID; |
| 13 | use Flow\Model\Workflow; |
| 14 | use Flow\Repository\TreeRepository; |
| 15 | use HTMLForm; |
| 16 | use MediaWiki\SpecialPage\FormSpecialPage; |
| 17 | use MediaWiki\Status\Status; |
| 18 | |
| 19 | class SpecialStructuredDiscussions extends FormSpecialPage { |
| 20 | |
| 21 | /** |
| 22 | * The type of content, e.g. 'post', 'workflow' |
| 23 | * @var string |
| 24 | */ |
| 25 | protected $type; |
| 26 | |
| 27 | /** |
| 28 | * Flow UUID |
| 29 | * @var string |
| 30 | */ |
| 31 | protected $uuid; |
| 32 | |
| 33 | public function __construct() { |
| 34 | parent::__construct( 'StructuredDiscussions' ); |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * @inheritDoc |
| 39 | */ |
| 40 | public function execute( $par ) { |
| 41 | parent::execute( $par ); |
| 42 | $this->addHelplink( 'Help:Structured_Discussions' ); |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Initialize $this->type and $this-uuid using the subpage string. |
| 47 | * @param string|null $par |
| 48 | */ |
| 49 | protected function setParameter( $par ) { |
| 50 | $tokens = $par !== null ? explode( '/', $par, 2 ) : []; |
| 51 | $this->type = $tokens[0] ?? ''; |
| 52 | if ( count( $tokens ) > 1 ) { |
| 53 | $this->uuid = $tokens[1]; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Get the mapping between display text and value for the type dropdown. |
| 59 | * @return array |
| 60 | */ |
| 61 | protected function getTypes() { |
| 62 | $mapping = [ |
| 63 | 'flow-special-type-post' => 'post', |
| 64 | 'flow-special-type-workflow' => 'workflow', |
| 65 | ]; |
| 66 | |
| 67 | $types = []; |
| 68 | foreach ( $mapping as $msgKey => $option ) { |
| 69 | $types[$this->msg( $msgKey )->escaped()] = $option; |
| 70 | } |
| 71 | return $types; |
| 72 | } |
| 73 | |
| 74 | protected function getFormFields() { |
| 75 | return [ |
| 76 | 'type' => [ |
| 77 | 'id' => 'mw-flow-special-type', |
| 78 | 'name' => 'type', |
| 79 | 'type' => 'select', |
| 80 | 'label-message' => 'flow-special-type', |
| 81 | 'options' => $this->getTypes(), |
| 82 | 'default' => $this->type === '' ? 'post' : $this->type, |
| 83 | ], |
| 84 | 'uuid' => [ |
| 85 | 'id' => 'mw-flow-special-uuid', |
| 86 | 'name' => 'uuid', |
| 87 | 'type' => 'text', |
| 88 | 'label-message' => 'flow-special-uuid', |
| 89 | 'default' => $this->uuid, |
| 90 | ], |
| 91 | ]; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Description shown at the top of the page |
| 96 | * @return string |
| 97 | */ |
| 98 | protected function preHtml() { |
| 99 | return '<p>' . $this->msg( 'flow-special-desc' )->escaped() . '</p>'; |
| 100 | } |
| 101 | |
| 102 | protected function alterForm( HTMLForm $form ) { |
| 103 | $form->setMethod( 'get' ); // This also submits the form every time the page loads. |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * @return string |
| 108 | */ |
| 109 | protected function getDisplayFormat() { |
| 110 | return 'ooui'; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Get the URL of a UUID for a PostRevision. |
| 115 | * @return string|null |
| 116 | */ |
| 117 | protected function getPostUrl() { |
| 118 | try { |
| 119 | $postId = UUID::create( $this->uuid ); |
| 120 | /** @var TreeRepository $treeRepo */ |
| 121 | $treeRepo = Container::get( 'repository.tree' ); |
| 122 | $rootId = $treeRepo->findRoot( $postId ); |
| 123 | /** @var ObjectManager $om */ |
| 124 | $om = Container::get( 'storage.workflow' ); |
| 125 | $workflow = $om->get( $rootId ); |
| 126 | if ( $workflow instanceof Workflow ) { |
| 127 | /** @var UrlGenerator $urlGenerator */ |
| 128 | $urlGenerator = Container::get( 'url_generator' ); |
| 129 | return $urlGenerator->postLink( |
| 130 | null, |
| 131 | $rootId, |
| 132 | $postId |
| 133 | )->getFullUrl(); |
| 134 | } else { |
| 135 | return null; |
| 136 | } |
| 137 | } catch ( FlowException $e ) { |
| 138 | return null; // The UUID is invalid or has no root post. |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Get the URL of a UUID for a workflow. |
| 144 | * @return string|null |
| 145 | */ |
| 146 | protected function getWorkflowUrl() { |
| 147 | try { |
| 148 | $rootId = UUID::create( $this->uuid ); |
| 149 | /** @var ObjectManager $om */ |
| 150 | $om = Container::get( 'storage.workflow' ); |
| 151 | $workflow = $om->get( $rootId ); |
| 152 | if ( $workflow instanceof Workflow ) { |
| 153 | /** @var UrlGenerator $urlGenerator */ |
| 154 | $urlGenerator = Container::get( 'url_generator' ); |
| 155 | return $urlGenerator->workflowLink( |
| 156 | null, |
| 157 | $rootId |
| 158 | )->getFullUrl(); |
| 159 | } else { |
| 160 | return null; |
| 161 | } |
| 162 | } catch ( FlowException $e ) { |
| 163 | return null; // The UUID is invalid or has no root post. |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Set redirect and return true if $data['uuid'] or $this->par exists and is |
| 169 | * a valid UUID; otherwise return false or a Status object encapsulating any |
| 170 | * error, which causes the form to be shown. |
| 171 | * @param array $data |
| 172 | * @return bool|Status |
| 173 | */ |
| 174 | public function onSubmit( array $data ) { |
| 175 | if ( !empty( $data['type'] ) && !empty( $data['uuid'] ) ) { |
| 176 | $this->setParameter( $data['type'] . '/' . $data['uuid'] ); |
| 177 | } |
| 178 | |
| 179 | // Assume no data has been passed in if there is no UUID. |
| 180 | if ( $this->uuid === null ) { |
| 181 | return false; // Display the form. |
| 182 | } |
| 183 | |
| 184 | switch ( $this->type ) { |
| 185 | case 'post': |
| 186 | $url = $this->getPostUrl(); |
| 187 | break; |
| 188 | case 'workflow': |
| 189 | $url = $this->getWorkflowUrl(); |
| 190 | break; |
| 191 | default: |
| 192 | $url = null; |
| 193 | break; |
| 194 | } |
| 195 | |
| 196 | if ( $url ) { |
| 197 | $this->getOutput()->redirect( $url ); |
| 198 | return true; |
| 199 | } else { |
| 200 | $this->getOutput()->setStatusCode( 404 ); |
| 201 | return Status::newFatal( 'flow-special-invalid-uuid' ); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | protected function getGroupName() { |
| 206 | return 'redirects'; |
| 207 | } |
| 208 | } |