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| 1 | <?php |
| 2 | |
| 3 | namespace ArticleCreationWorkflow; |
| 4 | |
| 5 | use MediaWiki\Config\Config; |
| 6 | use MediaWiki\Context\IContextSource; |
| 7 | use MediaWiki\Language\RawMessage; |
| 8 | use MediaWiki\Title\Title; |
| 9 | use MediaWiki\User\User; |
| 10 | |
| 11 | /** |
| 12 | * Contains this extension's business logic |
| 13 | */ |
| 14 | class Workflow { |
| 15 | |
| 16 | /** @var Config */ |
| 17 | private $config; |
| 18 | |
| 19 | /** |
| 20 | * @param Config $config Configuration to use |
| 21 | */ |
| 22 | public function __construct( Config $config ) { |
| 23 | $this->config = $config; |
| 24 | } |
| 25 | |
| 26 | /** |
| 27 | * @return Config |
| 28 | */ |
| 29 | public function getConfig() { |
| 30 | return $this->config; |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * Returns the message defining the landing page |
| 35 | * |
| 36 | * @return Title|null |
| 37 | */ |
| 38 | public function getLandingPageTitle() { |
| 39 | $landingPageName = $this->config->get( 'ArticleCreationLandingPage' ); |
| 40 | return Title::newFromText( $landingPageName ); |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Check whether an attempt to visit a missing page should be intercepted and replaced by our |
| 45 | * workflow. |
| 46 | * |
| 47 | * @param Title $title The title $user attempts to create |
| 48 | * @param User $user The user trying to load the editor |
| 49 | * @return bool |
| 50 | */ |
| 51 | public function shouldInterceptPage( Title $title, User $user ) { |
| 52 | // We are only interested in creation |
| 53 | if ( $title->exists() ) { |
| 54 | return false; |
| 55 | } |
| 56 | |
| 57 | // Articles only |
| 58 | if ( !$title->inNamespace( NS_MAIN ) ) { |
| 59 | return false; |
| 60 | } |
| 61 | |
| 62 | // User has perms, don't intercept |
| 63 | if ( $user->isAllowed( 'createpagemainns' ) ) { |
| 64 | return false; |
| 65 | } |
| 66 | |
| 67 | // Only intercept users who can potentially create articles otherwise |
| 68 | if ( !$user->isAllowed( 'createpage' ) ) { |
| 69 | return false; |
| 70 | } |
| 71 | |
| 72 | // Don't intercept if the landing page is not configured |
| 73 | $landingPage = $this->getLandingPageTitle(); |
| 74 | if ( $landingPage === null || !$landingPage->exists() ) { |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * If a user without sufficient permissions attempts to view or create a missing page in the main |
| 83 | * namespace, display our workflow instead with a message defined on-wiki. |
| 84 | * |
| 85 | * @param Title $title |
| 86 | * @param User $user |
| 87 | * @param IContextSource $context |
| 88 | * @return bool Whether we intercepted the page view by displaying our own message |
| 89 | */ |
| 90 | public function interceptIfNeeded( Title $title, User $user, IContextSource $context ) { |
| 91 | if ( $this->shouldInterceptPage( $title, $user ) ) { |
| 92 | // If the landing page didn't exist, we wouldn't have intercepted, so it's guaranteed to exist |
| 93 | // here ($landingPage is not null). |
| 94 | $landingPage = $this->getLandingPageTitle(); |
| 95 | $output = $context->getOutput(); |
| 96 | $output->disableClientCache(); |
| 97 | |
| 98 | // Transclude the landing page instead of redirecting. This allows for the deletion log snippet |
| 99 | // to be shown as usual, and for magic words like {{PAGENAME}} to be used in the message. (T204234) |
| 100 | $msg = new RawMessage( '{{:' . $landingPage->getPrefixedText() . '}}' ); |
| 101 | $output->addHTML( $msg->parseAsBlock() ); |
| 102 | |
| 103 | return true; |
| 104 | } |
| 105 | |
| 106 | return false; |
| 107 | } |
| 108 | } |