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[mediawiki.git] / includes / logging / LogPage.php

<?php
/**
 * Contain log classes
 *
 * Copyright © 2002, 2004 Brooke Vibber <bvibber@wikimedia.org>
 * https://www.mediawiki.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

use MediaWiki\Context\RequestContext;
use MediaWiki\Language\Language;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Message\Message;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\StubObject\StubUserLang;
use MediaWiki\Title\Title;
use MediaWiki\User\User;
use MediaWiki\User\UserIdentity;

/**
 * Class to simplify the use of log pages.
 * The logs are now kept in a table which is easier to manage and trim
 * than ever-growing wiki pages.
 *
 * @newable
 * @note marked as newable in 1.35 for lack of a better alternative,
 *       but should become a stateless service, use the command pattern.
 */
class LogPage {
        public const DELETED_ACTION = 1;
        public const DELETED_COMMENT = 2;
        public const DELETED_USER = 4;
        public const DELETED_RESTRICTED = 8;

        // Convenience fields
        public const SUPPRESSED_USER = self::DELETED_USER | self::DELETED_RESTRICTED;
        public const SUPPRESSED_ACTION = self::DELETED_ACTION | self::DELETED_RESTRICTED;

        /** @var bool */
        public $updateRecentChanges;

        /** @var bool */
        public $sendToUDP;

        /** @var string Plaintext version of the message for IRC */
        private $ircActionText;

        /** @var string Plaintext version of the message */
        private $actionText;

        /** @var string One of '', 'block', 'protect', 'rights', 'delete',
         *    'upload', 'move'
         */
        private $type;

        /** @var string One of '', 'block', 'protect', 'rights', 'delete',
         *   'upload', 'move', 'move_redir'
         */
        private $action;

        /** @var string Comment associated with action */
        private $comment;

        /** @var string Blob made of a parameters array */
        private $params;

        /** @var UserIdentity The user doing the action */
        private $performer;

        /** @var Title */
        private $target;

        /**
         * @stable to call
         * @param string $type One of '', 'block', 'protect', 'rights', 'delete',
         *   'upload', 'move'
         * @param bool $rc Whether to update recent changes as well as the logging table
         * @param string $udp Pass 'UDP' to send to the UDP feed if NOT sent to RC
         */
        public function __construct( $type, $rc = true, $udp = 'skipUDP' ) {
                $this->type = $type;
                $this->updateRecentChanges = $rc;
                $this->sendToUDP = ( $udp == 'UDP' );
        }

        /**
         * @return int The log_id of the inserted log entry
         */
        protected function saveContent() {
                $logRestrictions = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::LogRestrictions );

                $dbw = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase();

                $now = wfTimestampNow();
                $actorId = MediaWikiServices::getInstance()->getActorNormalization()
                        ->acquireActorId( $this->performer, $dbw );
                $data = [
                        'log_type' => $this->type,
                        'log_action' => $this->action,
                        'log_timestamp' => $dbw->timestamp( $now ),
                        'log_actor' => $actorId,
                        'log_namespace' => $this->target->getNamespace(),
                        'log_title' => $this->target->getDBkey(),
                        'log_page' => $this->target->getArticleID(),
                        'log_params' => $this->params
                ];
                $data += MediaWikiServices::getInstance()->getCommentStore()->insert(
                        $dbw,
                        'log_comment',
                        $this->comment
                );
                $dbw->newInsertQueryBuilder()
                        ->insertInto( 'logging' )
                        ->row( $data )
                        ->caller( __METHOD__ )->execute();
                $newId = $dbw->insertId();

                # And update recentchanges
                if ( $this->updateRecentChanges ) {
                        $titleObj = SpecialPage::getTitleFor( 'Log', $this->type );

                        RecentChange::notifyLog(
                                $now, $titleObj, $this->performer, $this->getRcComment(), '',
                                $this->type, $this->action, $this->target, $this->comment,
                                $this->params, $newId, $this->getRcCommentIRC()
                        );
                } elseif ( $this->sendToUDP ) {
                        # Don't send private logs to UDP
                        if ( isset( $logRestrictions[$this->type] ) && $logRestrictions[$this->type] != '*' ) {
                                return $newId;
                        }

                        // Notify external application via UDP.
                        // We send this to IRC but do not want to add it the RC table.
                        $titleObj = SpecialPage::getTitleFor( 'Log', $this->type );
                        $rc = RecentChange::newLogEntry(
                                $now, $titleObj, $this->performer, $this->getRcComment(), '',
                                $this->type, $this->action, $this->target, $this->comment,
                                $this->params, $newId, $this->getRcCommentIRC()
                        );
                        $rc->notifyRCFeeds();
                }

                return $newId;
        }

        /**
         * Get the RC comment from the last addEntry() call
         *
         * @return string
         */
        public function getRcComment() {
                $rcComment = $this->actionText;

                if ( $this->comment != '' ) {
                        if ( $rcComment == '' ) {
                                $rcComment = $this->comment;
                        } else {
                                $rcComment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() .
                                        $this->comment;
                        }
                }

                return $rcComment;
        }

        /**
         * Get the RC comment from the last addEntry() call for IRC
         *
         * @return string
         */
        public function getRcCommentIRC() {
                $rcComment = $this->ircActionText;

                if ( $this->comment != '' ) {
                        if ( $rcComment == '' ) {
                                $rcComment = $this->comment;
                        } else {
                                $rcComment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() .
                                        $this->comment;
                        }
                }

                return $rcComment;
        }

        /**
         * Get the comment from the last addEntry() call
         * @return string
         */
        public function getComment() {
                return $this->comment;
        }

        /**
         * Get the list of valid log types
         *
         * @return string[]
         */
        public static function validTypes() {
                $logTypes = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::LogTypes );

                return $logTypes;
        }

        /**
         * Is $type a valid log type
         *
         * @param string $type Log type to check
         * @return bool
         */
        public static function isLogType( $type ) {
                return in_array( $type, self::validTypes() );
        }

        /**
         * Generate text for a log entry.
         * Only LogFormatter should call this function.
         *
         * @param string $type Log type
         * @param string $action Log action
         * @param Title|null $title
         * @param Skin|null $skin Skin object or null. If null, we want to use the wiki
         *   content language, since that will go to the IRC feed.
         * @param array $params
         * @param bool $filterWikilinks Whether to filter wiki links
         * @return string HTML
         */
        public static function actionText( $type, $action, $title = null, $skin = null,
                $params = [], $filterWikilinks = false
        ) {
                global $wgLang;
                $config = MediaWikiServices::getInstance()->getMainConfig();
                $key = "$type/$action";

                $logActions = $config->get( MainConfigNames::LogActions );

                if ( isset( $logActions[$key] ) ) {
                        $message = $logActions[$key];
                } else {
                        wfDebug( "LogPage::actionText - unknown action $key" );
                        $message = "log-unknown-action";
                        $params = [ $key ];
                }

                if ( $skin === null ) {
                        $langObj = MediaWikiServices::getInstance()->getContentLanguage();
                        $langObjOrNull = null;
                } else {
                        // TODO Is $skin->getLanguage() safe here?
                        StubUserLang::unstub( $wgLang );
                        $langObj = $wgLang;
                        $langObjOrNull = $wgLang;
                }
                if ( $title === null ) {
                        $rv = wfMessage( $message )->inLanguage( $langObj )->escaped();
                } else {
                        $titleLink = self::getTitleLink( $title, $langObjOrNull );

                        if ( count( $params ) == 0 ) {
                                $rv = wfMessage( $message )->rawParams( $titleLink )
                                        ->inLanguage( $langObj )->escaped();
                        } else {
                                array_unshift( $params, $titleLink );

                                $rv = wfMessage( $message )->rawParams( $params )
                                                ->inLanguage( $langObj )->escaped();
                        }
                }

                // For the perplexed, this feature was added in r7855 by Erik.
                // The feature was added because we liked adding [[$1]] in our log entries
                // but the log entries are parsed as Wikitext on RecentChanges but as HTML
                // on Special:Log. The hack is essentially that [[$1]] represented a link
                // to the title in question. The first parameter to the HTML version (Special:Log)
                // is that link in HTML form, and so this just gets rid of the ugly [[]].
                // However, this is a horrible hack and it doesn't work like you expect if, say,
                // you want to link to something OTHER than the title of the log entry.
                // The real problem, which Erik was trying to fix (and it sort-of works now) is
                // that the same messages are being treated as both wikitext *and* HTML.
                if ( $filterWikilinks ) {
                        $rv = str_replace( '[[', '', $rv );
                        $rv = str_replace( ']]', '', $rv );
                }

                return $rv;
        }

        /**
         * @param Title $title
         * @param ?Language $lang
         * @return string HTML
         */
        private static function getTitleLink( Title $title, ?Language $lang ): string {
                if ( !$lang ) {
                        return $title->getPrefixedText();
                }

                $services = MediaWikiServices::getInstance();
                $linkRenderer = $services->getLinkRenderer();

                if ( $title->isSpecialPage() ) {
                        [ $name, $par ] = $services->getSpecialPageFactory()->resolveAlias( $title->getDBkey() );

                        if ( $name === 'Log' ) {
                                $logPage = new LogPage( $par );
                                return wfMessage( 'parentheses' )
                                        ->rawParams( $linkRenderer->makeLink( $title, $logPage->getName()->text() ) )
                                        ->inLanguage( $lang )
                                        ->escaped();
                        }
                }

                return $linkRenderer->makeLink( $title );
        }

        /**
         * Add a log entry
         *
         * @param string $action One of '', 'block', 'protect', 'rights', 'delete',
         *   'upload', 'move', 'move_redir'
         * @param Title $target
         * @param string|null $comment Description associated
         * @param array $params Parameters passed later to wfMessage function
         * @param int|UserIdentity $performer The user doing the action, or their user id.
         *   Calling with user ID is deprecated since 1.36.
         *
         * @return int The log_id of the inserted log entry
         */
        public function addEntry( $action, $target, $comment, $params, $performer ) {
                // FIXME $params is only documented to accept an array
                if ( !is_array( $params ) ) {
                        $params = [ $params ];
                }

                # Trim spaces on user supplied text
                $comment = trim( $comment ?? '' );

                $this->action = $action;
                $this->target = $target;
                $this->comment = $comment;
                $this->params = self::makeParamBlob( $params );

                if ( !is_object( $performer ) ) {
                        $performer = User::newFromId( $performer );
                }

                $this->performer = $performer;

                $logEntry = new ManualLogEntry( $this->type, $action );
                $logEntry->setTarget( $target );
                $logEntry->setPerformer( $performer );
                $logEntry->setParameters( $params );
                // All log entries using the LogPage to insert into the logging table
                // are using the old logging system and therefore the legacy flag is
                // needed to say the LogFormatter the parameters have numeric keys
                $logEntry->setLegacy( true );

                $formatter = MediaWikiServices::getInstance()->getLogFormatterFactory()->newFromEntry( $logEntry );
                $context = RequestContext::newExtraneousContext( $target );
                $formatter->setContext( $context );

                $this->actionText = $formatter->getPlainActionText();
                $this->ircActionText = $formatter->getIRCActionText();

                return $this->saveContent();
        }

        /**
         * Add relations to log_search table
         *
         * @param string $field
         * @param array $values
         * @param int $logid
         * @return bool
         */
        public function addRelations( $field, $values, $logid ) {
                if ( !strlen( $field ) || !$values ) {
                        return false;
                }
                $insert = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase()
                        ->newInsertQueryBuilder()
                        ->insertInto( 'log_search' )
                        ->ignore();
                foreach ( $values as $value ) {
                        $insert->row( [ 'ls_field' => $field, 'ls_value' => $value, 'ls_log_id' => $logid ] );
                }
                $insert->caller( __METHOD__ )->execute();

                return true;
        }

        /**
         * Create a blob from a parameter array
         *
         * @param array $params
         * @return string
         */
        public static function makeParamBlob( $params ) {
                return implode( "\n", $params );
        }

        /**
         * Extract a parameter array from a blob
         *
         * @param string $blob
         * @return array
         */
        public static function extractParams( $blob ) {
                if ( $blob === '' ) {
                        return [];
                } else {
                        return explode( "\n", $blob );
                }
        }

        /**
         * Name of the log.
         * @return Message
         * @since 1.19
         */
        public function getName() {
                $logNames = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::LogNames );

                // BC
                $key = $logNames[$this->type] ?? 'log-name-' . $this->type;

                return wfMessage( $key );
        }

        /**
         * Description of this log type.
         * @return Message
         * @since 1.19
         */
        public function getDescription() {
                $logHeaders = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::LogHeaders );
                // BC
                $key = $logHeaders[$this->type] ?? 'log-description-' . $this->type;

                return wfMessage( $key );
        }

        /**
         * Returns the right needed to read this log type.
         * @return string
         * @since 1.19
         */
        public function getRestriction() {
                $logRestrictions = MediaWikiServices::getInstance()->getMainConfig()->get( MainConfigNames::LogRestrictions );
                // The empty string fallback will
                // always return true in permission check
                return $logRestrictions[$this->type] ?? '';
        }

        /**
         * Tells if this log is not viewable by all.
         * @return bool
         * @since 1.19
         */
        public function isRestricted() {
                $restriction = $this->getRestriction();

                return $restriction !== '' && $restriction !== '*';
        }
}