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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | * |
| 17 | * @file |
| 18 | */ |
| 19 | |
| 20 | namespace AutoModerator; |
| 21 | |
| 22 | use MediaWiki\Config\Config; |
| 23 | use MediaWiki\Context\RequestContext; |
| 24 | use MediaWiki\Http\HttpRequestFactory; |
| 25 | use MediaWiki\Json\FormatJson; |
| 26 | use MediaWiki\Linker\LinkTarget; |
| 27 | use MediaWiki\Logger\LoggerFactory; |
| 28 | use MediaWiki\Title\TitleFactory; |
| 29 | use MediaWiki\User\User; |
| 30 | use MediaWiki\User\UserGroupManager; |
| 31 | use MediaWiki\Utils\UrlUtils; |
| 32 | use MediaWiki\WikiMap\WikiMap; |
| 33 | use RuntimeException; |
| 34 | use StatusValue; |
| 35 | use UnexpectedValueException; |
| 36 | |
| 37 | class Util { |
| 38 | |
| 39 | /** |
| 40 | * @param Config $config |
| 41 | * |
| 42 | * @return string Wiki ID used by AutoModerator. |
| 43 | */ |
| 44 | public static function getWikiID( $config ): string { |
| 45 | $autoModeratorWikiId = $config->get( 'AutoModeratorWikiId' ); |
| 46 | if ( $autoModeratorWikiId ) { |
| 47 | return $autoModeratorWikiId; |
| 48 | } |
| 49 | return WikiMap::getCurrentWikiId(); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Get a user to perform moderation actions. |
| 54 | * @param Config $config |
| 55 | * @param UserGroupManager $userGroupManager |
| 56 | * |
| 57 | * @return User |
| 58 | */ |
| 59 | public static function getAutoModeratorUser( $config, $userGroupManager ): User { |
| 60 | $username = $config->get( 'AutoModeratorUsername' ); |
| 61 | $autoModeratorUser = User::newSystemUser( $username, [ 'steal' => true ] ); |
| 62 | '@phan-var User $autoModeratorUser'; |
| 63 | if ( !$autoModeratorUser ) { |
| 64 | throw new UnexpectedValueException( |
| 65 | "{$username} is invalid. Please change it." |
| 66 | ); |
| 67 | } |
| 68 | // Assign the 'bot' group to the user, so that it looks like a bot |
| 69 | if ( !in_array( 'bot', $userGroupManager->getUserGroups( $autoModeratorUser ) ) ) { |
| 70 | $userGroupManager->addUserToGroup( $autoModeratorUser, 'bot' ); |
| 71 | } |
| 72 | return $autoModeratorUser; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Fetch JSON data from a remote URL, parse it and return the results. |
| 77 | * @param HttpRequestFactory $requestFactory |
| 78 | * @param string $url |
| 79 | * @param bool $isSameFarm Is the URL on the same wiki farm we are making the request from? |
| 80 | * @return StatusValue A status object with the parsed JSON value, or any errors. |
| 81 | * (Warnings coming from the HTTP library will be logged and not included here.) |
| 82 | */ |
| 83 | public static function getJsonUrl( |
| 84 | HttpRequestFactory $requestFactory, $url, $isSameFarm = false |
| 85 | ): StatusValue { |
| 86 | $options = [ |
| 87 | 'method' => 'GET', |
| 88 | 'userAgent' => $requestFactory->getUserAgent() . ' AutoModerator', |
| 89 | ]; |
| 90 | if ( $isSameFarm ) { |
| 91 | $options['originalRequest'] = RequestContext::getMain()->getRequest(); |
| 92 | } |
| 93 | $request = $requestFactory->create( $url, $options, __METHOD__ ); |
| 94 | $status = $request->execute(); |
| 95 | if ( $status->isOK() ) { |
| 96 | $status->merge( FormatJson::parse( $request->getContent(), FormatJson::FORCE_ASSOC ), true ); |
| 97 | } |
| 98 | // Log warnings here. The caller is expected to handle errors so do not double-log them. |
| 99 | [ $errorStatus, $warningStatus ] = $status->splitByErrorType(); |
| 100 | if ( !$warningStatus->isGood() ) { |
| 101 | // @todo replace 'en' with correct language configuration |
| 102 | LoggerFactory::getInstance( 'AutoModerator' )->warning( |
| 103 | $warningStatus->getWikiText( false, false, 'en' ), |
| 104 | [ 'exception' => new RuntimeException ] |
| 105 | ); |
| 106 | } |
| 107 | return $errorStatus; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Get the action=raw URL for a (probably remote) title. |
| 112 | * Normal title methods would return nice URLs, which are usually disallowed for action=raw. |
| 113 | * We assume both wikis use the same URL structure. |
| 114 | * @param LinkTarget $title |
| 115 | * @param TitleFactory $titleFactory |
| 116 | * @return string |
| 117 | */ |
| 118 | public static function getRawUrl( |
| 119 | LinkTarget $title, |
| 120 | TitleFactory $titleFactory, |
| 121 | UrlUtils $urlUtils |
| 122 | ): string { |
| 123 | // Use getFullURL to get the interwiki domain. |
| 124 | $url = $titleFactory->newFromLinkTarget( $title )->getFullURL(); |
| 125 | $parts = $urlUtils->parse( (string)$urlUtils->expand( $url, PROTO_CANONICAL ) ); |
| 126 | if ( !$parts ) { |
| 127 | throw new UnexpectedValueException( 'URL is expected to be valid' ); |
| 128 | } |
| 129 | $baseUrl = $parts['scheme'] . $parts['delimiter'] . $parts['host']; |
| 130 | if ( isset( $parts['port'] ) && $parts['port'] ) { |
| 131 | $baseUrl .= ':' . $parts['port']; |
| 132 | } |
| 133 | |
| 134 | $localPageTitle = $titleFactory->makeTitle( $title->getNamespace(), $title->getDBkey() ); |
| 135 | return $baseUrl . $localPageTitle->getLocalURL( [ 'action' => 'raw' ] ); |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * If the AutoModeratorRevertProbability configuration |
| 140 | * field is set below 0.95 we default to 0.95 to prevent |
| 141 | * large numbers of false positives. |
| 142 | * @param Config $config |
| 143 | * @return float AutoModeratorRevertProbability threshold |
| 144 | */ |
| 145 | public static function getRevertThreshold( Config $config ): float { |
| 146 | $minimumThreshold = 0.95; |
| 147 | $revertThreshold = $config->get( 'AutoModeratorRevertProbability' ); |
| 148 | if ( $revertThreshold < $minimumThreshold ) { |
| 149 | return $minimumThreshold; |
| 150 | } |
| 151 | return $revertThreshold; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * @param Config $config |
| 156 | * @return LiftWingClient |
| 157 | */ |
| 158 | public static function initializeLiftWingClient( Config $config ): LiftWingClient { |
| 159 | $model = 'revertrisk-language-agnostic'; |
| 160 | $lang = self::getLanguageConfiguration( $config ); |
| 161 | $hostHeader = $config->get( 'AutoModeratorLiftWingAddHostHeader' ) ? |
| 162 | $config->get( 'AutoModeratorLiftWingRevertRiskHostHeader' ) : null; |
| 163 | return new LiftWingClient( |
| 164 | $model, |
| 165 | $lang, |
| 166 | $config->get( 'AutoModeratorLiftWingBaseUrl' ), |
| 167 | $hostHeader ); |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * @param Config $config |
| 172 | * @return false|string |
| 173 | */ |
| 174 | public static function getLanguageConfiguration( Config $config ) { |
| 175 | $wikiId = self::getWikiID( $config ); |
| 176 | return substr( $wikiId, 0, strpos( $wikiId, "wiki" ) ); |
| 177 | } |
| 178 | } |