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| 1 | <?php |
| 2 | |
| 3 | namespace GrowthExperiments\UserImpact; |
| 4 | |
| 5 | use FormatJson; |
| 6 | use GrowthExperiments\Util; |
| 7 | use IDBAccessObject; |
| 8 | use JsonContent; |
| 9 | use MediaWiki\Page\WikiPageFactory; |
| 10 | use MediaWiki\Title\TitleValue; |
| 11 | use MediaWiki\User\UserIdentity; |
| 12 | |
| 13 | /** |
| 14 | * Load user impact data from JSON stored at the page `User:<name>/userimpact.json`, |
| 15 | * and potentially fall back to another lookup mechanism if it doesn't exist. |
| 16 | */ |
| 17 | class SubpageUserImpactLookup implements UserImpactLookup { |
| 18 | |
| 19 | use ExpensiveUserImpactFallbackTrait; |
| 20 | |
| 21 | private const SUBPAGE_NAME = 'userimpact.json'; |
| 22 | |
| 23 | /** @var WikiPageFactory */ |
| 24 | private $wikiPageFactory; |
| 25 | |
| 26 | /** @var UserImpactLookup */ |
| 27 | private $fallbackLookup; |
| 28 | |
| 29 | /** |
| 30 | * @param WikiPageFactory $wikiPageFactory |
| 31 | * @param UserImpactLookup|null $fallbackLookup |
| 32 | */ |
| 33 | public function __construct( |
| 34 | WikiPageFactory $wikiPageFactory, |
| 35 | UserImpactLookup $fallbackLookup = null |
| 36 | ) { |
| 37 | $this->wikiPageFactory = $wikiPageFactory; |
| 38 | $this->fallbackLookup = $fallbackLookup; |
| 39 | } |
| 40 | |
| 41 | /** @inheritDoc */ |
| 42 | public function getUserImpact( UserIdentity $user, int $flags = IDBAccessObject::READ_NORMAL ): ?UserImpact { |
| 43 | $subpageTitle = new TitleValue( NS_USER, $user->getName() . '/' . self::SUBPAGE_NAME ); |
| 44 | $subpage = $this->wikiPageFactory->newFromLinkTarget( $subpageTitle ); |
| 45 | |
| 46 | if ( !$subpage->exists() ) { |
| 47 | return $this->fallbackLookup ? $this->fallbackLookup->getUserImpact( $user ) : null; |
| 48 | } |
| 49 | $content = $subpage->getContent(); |
| 50 | if ( !( $content instanceof JsonContent ) ) { |
| 51 | Util::logText( 'Page User:' . $user->getName() . '/' |
| 52 | . self::SUBPAGE_NAME . ' has unexpected content model ' . $content->getModel() ); |
| 53 | return null; |
| 54 | } |
| 55 | |
| 56 | $dataStatus = FormatJson::parse( $content->getText(), FormatJson::FORCE_ASSOC ); |
| 57 | if ( !$dataStatus->isOK() ) { |
| 58 | Util::logText( 'Invalid JSON content: ' |
| 59 | . $dataStatus->getWikiText( false, false, 'en' ) ); |
| 60 | return null; |
| 61 | } |
| 62 | $data = $dataStatus->getValue(); |
| 63 | |
| 64 | return UserImpact::newFromJsonArray( $data ); |
| 65 | } |
| 66 | |
| 67 | } |