PHPSessionHandler: Implement SessionHandlerInterface

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

<?php
/**
 * Contain log classes
 *
 * Copyright © 2002, 2004 Brion Vibber <brion@pobox.com>
 * 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
 */

/**
 * 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.
 *
 */
class LogPage {
        const DELETED_ACTION = 1;
        const DELETED_COMMENT = 2;
        const DELETED_USER = 4;
        const DELETED_RESTRICTED = 8;

        // Convenience fields
        const SUPPRESSED_USER = 12;
        const SUPPRESSED_ACTION = 9;

        /** @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 User The user doing the action */
        private $doer;

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

        /**
         * Constructor
         *
         * @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() {
                global $wgLogRestrictions;

                $dbw = wfGetDB( DB_MASTER );
                $log_id = $dbw->nextSequenceValue( 'logging_log_id_seq' );

                // @todo FIXME private/protected/public property?
                $this->timestamp = $now = wfTimestampNow();
                $data = array(
                        'log_id' => $log_id,
                        'log_type' => $this->type,
                        'log_action' => $this->action,
                        'log_timestamp' => $dbw->timestamp( $now ),
                        'log_user' => $this->doer->getId(),
                        'log_user_text' => $this->doer->getName(),
                        'log_namespace' => $this->target->getNamespace(),
                        'log_title' => $this->target->getDBkey(),
                        'log_page' => $this->target->getArticleID(),
                        'log_comment' => $this->comment,
                        'log_params' => $this->params
                );
                $dbw->insert( 'logging', $data, __METHOD__ );
                $newId = !is_null( $log_id ) ? $log_id : $dbw->insertId();

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

                        RecentChange::notifyLog(
                                $now, $titleObj, $this->doer, $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( $wgLogRestrictions[$this->type] ) && $wgLogRestrictions[$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->doer, $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 array Array of strings
         */
        public static function validTypes() {
                global $wgLogTypes;

                return $wgLogTypes;
        }

        /**
         * Is $type a valid log type
         *
         * @param string $type Log type to check
         * @return bool
         */
        public static function isLogType( $type ) {
                return in_array( $type, LogPage::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 Title object or null
         * @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 Parameters
         * @param bool $filterWikilinks Whether to filter wiki links
         * @return string HTML
         */
        public static function actionText( $type, $action, $title = null, $skin = null,
                $params = array(), $filterWikilinks = false
        ) {
                global $wgLang, $wgContLang, $wgLogActions;

                if ( is_null( $skin ) ) {
                        $langObj = $wgContLang;
                        $langObjOrNull = null;
                } else {
                        $langObj = $wgLang;
                        $langObjOrNull = $wgLang;
                }

                $key = "$type/$action";

                if ( isset( $wgLogActions[$key] ) ) {
                        if ( is_null( $title ) ) {
                                $rv = wfMessage( $wgLogActions[$key] )->inLanguage( $langObj )->escaped();
                        } else {
                                $titleLink = self::getTitleLink( $type, $langObjOrNull, $title, $params );

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

                                        $rv = wfMessage( $wgLogActions[$key] )->rawParams( $params )
                                                        ->inLanguage( $langObj )->escaped();
                                }
                        }
                } else {
                        global $wgLogActionsHandlers;

                        if ( isset( $wgLogActionsHandlers[$key] ) ) {
                                $args = func_get_args();
                                $rv = call_user_func_array( $wgLogActionsHandlers[$key], $args );
                        } else {
                                wfDebug( "LogPage::actionText - unknown action $key\n" );
                                $rv = "$action";
                        }
                }

                // 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;
        }

        /**
         * @todo Document
         * @param string $type
         * @param Language|null $lang
         * @param Title $title
         * @param array $params
         * @return string
         */
        protected static function getTitleLink( $type, $lang, $title, &$params ) {
                if ( !$lang ) {
                        return $title->getPrefixedText();
                }

                if ( $title->isSpecialPage() ) {
                        list( $name, $par ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );

                        # Use the language name for log titles, rather than Log/X
                        if ( $name == 'Log' ) {
                                $logPage = new LogPage( $par );
                                $titleLink = Linker::link( $title, $logPage->getName()->escaped() );
                                $titleLink = wfMessage( 'parentheses' )
                                        ->inLanguage( $lang )
                                        ->rawParams( $titleLink )
                                        ->escaped();
                        } else {
                                $titleLink = Linker::link( $title );
                        }
                } else {
                        $titleLink = Linker::link( $title );
                }

                return $titleLink;
        }

        /**
         * Add a log entry
         *
         * @param string $action One of '', 'block', 'protect', 'rights', 'delete',
         *   'upload', 'move', 'move_redir'
         * @param Title $target Title object
         * @param string $comment Description associated
         * @param array $params Parameters passed later to wfMessage function
         * @param null|int|User $doer The user doing the action. null for $wgUser
         *
         * @return int The log_id of the inserted log entry
         */
        public function addEntry( $action, $target, $comment, $params = array(), $doer = null ) {
                global $wgContLang;

                if ( !is_array( $params ) ) {
                        $params = array( $params );
                }

                if ( $comment === null ) {
                        $comment = '';
                }

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

                # Truncate for whole multibyte characters.
                $comment = $wgContLang->truncate( $comment, 255 );

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

                if ( $doer === null ) {
                        global $wgUser;
                        $doer = $wgUser;
                } elseif ( !is_object( $doer ) ) {
                        $doer = User::newFromId( $doer );
                }

                $this->doer = $doer;

                $logEntry = new ManualLogEntry( $this->type, $action );
                $logEntry->setTarget( $target );
                $logEntry->setPerformer( $doer );
                $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 = LogFormatter::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 ) || empty( $values ) ) {
                        return false; // nothing
                }

                $data = array();

                foreach ( $values as $value ) {
                        $data[] = array(
                                'ls_field' => $field,
                                'ls_value' => $value,
                                'ls_log_id' => $logid
                        );
                }

                $dbw = wfGetDB( DB_MASTER );
                $dbw->insert( 'log_search', $data, __METHOD__, 'IGNORE' );

                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 array();
                } else {
                        return explode( "\n", $blob );
                }
        }

        /**
         * Name of the log.
         * @return Message
         * @since 1.19
         */
        public function getName() {
                global $wgLogNames;

                // BC
                if ( isset( $wgLogNames[$this->type] ) ) {
                        $key = $wgLogNames[$this->type];
                } else {
                        $key = 'log-name-' . $this->type;
                }

                return wfMessage( $key );
        }

        /**
         * Description of this log type.
         * @return Message
         * @since 1.19
         */
        public function getDescription() {
                global $wgLogHeaders;
                // BC
                if ( isset( $wgLogHeaders[$this->type] ) ) {
                        $key = $wgLogHeaders[$this->type];
                } else {
                        $key = 'log-description-' . $this->type;
                }

                return wfMessage( $key );
        }

        /**
         * Returns the right needed to read this log type.
         * @return string
         * @since 1.19
         */
        public function getRestriction() {
                global $wgLogRestrictions;
                if ( isset( $wgLogRestrictions[$this->type] ) ) {
                        $restriction = $wgLogRestrictions[$this->type];
                } else {
                        // '' always returns true with $user->isAllowed()
                        $restriction = '';
                }

                return $restriction;
        }

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

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