LogEventsList.php

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<?php
use MediaWiki\Linker\LinkRenderer;
use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\IDatabase;

class LogEventsList extends ContextSource {
    const NO_ACTION_LINK = 1;
    const NO_EXTRA_USER_LINKS = 2;
    const USE_CHECKBOXES = 4;

    public $flags;

    protected $mDefaultQuery;

    protected $showTagEditUI;

    protected $allowedActions = null;

    private $linkRenderer;

    public function __construct( $context, $linkRenderer = null, $flags = 0 ) {
        if ( $context instanceof IContextSource ) {
            $this->setContext( $context );
        } else {
            // Old parameters, $context should be a Skin object
            $this->setContext( $context->getContext() );
        }

        $this->flags = $flags;
        $this->showTagEditUI = ChangeTags::showTagEditingUI( $this->getUser() );
        if ( $linkRenderer instanceof LinkRenderer ) {
            $this->linkRenderer = $linkRenderer;
        }
    }

    protected function getLinkRenderer() {
        if ( $this->linkRenderer !== null ) {
            return $this->linkRenderer;
        } else {
            return MediaWikiServices::getInstance()->getLinkRenderer();
        }
    }

    public function showOptions( $types = [], $user = '', $page = '', $pattern = false, $year = 0,
        $month = 0, $day = 0, $filter = null, $tagFilter = '', $action = null
    ) {
        // For B/C, we take strings, but make sure they are converted...
        $types = ( $types === '' ) ? [] : (array)$types;

        $formDescriptor = [];

        // Basic selectors
        $formDescriptor['type'] = $this->getTypeMenuDesc( $types );
        $formDescriptor['user'] = $this->getUserInputDesc( $user );
        $formDescriptor['page'] = $this->getTitleInputDesc( $page );

        // Add extra inputs if any
        // This could either be a form descriptor array or a string with raw HTML.
        // We need it to work in both cases and show a deprecation warning if it
        // is a string. See T199495.
        $extraInputsDescriptor = $this->getExtraInputsDesc( $types );
        if (
            is_array( $extraInputsDescriptor ) &&
            !empty( $extraInputsDescriptor )
        ) {
            $formDescriptor[ 'extra' ] = $extraInputsDescriptor;
        } elseif (
            is_string( $extraInputsDescriptor ) &&
            $extraInputsDescriptor !== ''
        ) {
            // We'll add this to the footer of the form later
            $extraInputsString = $extraInputsDescriptor;
            wfDeprecated( '$input in LogEventsListGetExtraInputs hook', '1.32' );
        }

        // Title pattern, if allowed
        if ( !$this->getConfig()->get( 'MiserMode' ) ) {
            $formDescriptor['pattern'] = $this->getTitlePatternDesc( $pattern );
        }

        // Date menu
        $formDescriptor['date'] = [
            'type' => 'date',
            'label-message' => 'date',
            'default' => sprintf( "%04d-%02d-%02d", $year, $month, $day ),
        ];

        // Tag filter
        $formDescriptor['tagfilter'] = [
            'type' => 'tagfilter',
            'name' => 'tagfilter',
            'label-raw' => $this->msg( 'tag-filter' )->parse(),
        ];

        // Filter links
        if ( $filter ) {
            $formDescriptor['filters'] = $this->getFiltersDesc( $filter );
        }

        // Action filter
        if (
            $action !== null &&
            $this->allowedActions !== null &&
            count( $this->allowedActions ) > 0
        ) {
            $formDescriptor['subtype'] = $this->getActionSelectorDesc( $types, $action );
        }

        $context = new DerivativeContext( $this->getContext() );
        $context->setTitle( SpecialPage::getTitleFor( 'Log' ) ); // Remove subpage
        $htmlForm = new HTMLForm( $formDescriptor, $context );
        $htmlForm
            ->setSubmitText( $this->msg( 'logeventslist-submit' )->text() )
            ->setMethod( 'get' )
            ->setWrapperLegendMsg( 'log' );

        // TODO This will should be removed at some point. See T199495.
        if ( isset( $extraInputsString ) ) {
            $htmlForm->addFooterText( Html::rawElement(
                'div',
                null,
                $extraInputsString
            ) );
        }

        $htmlForm->prepareForm()->displayForm( false );
    }

    private function getFiltersDesc( $filter ) {
        $options = [];
        $default = [];
        foreach ( $filter as $type => $val ) {
            $message = $this->msg( "logeventslist-{$type}-log" );
            // FIXME: Remove this check once T199657 is fully resolved.
            if ( !$message->exists() ) {
                $message = $this->msg( "log-show-hide-{$type}" )->params( $this->msg( 'show' )->text() );
            }
            $options[ $message->text() ] = $type;

            if ( $val === false ) {
                $default[] = $type;
            }
        }
        return [
            'class' => 'HTMLMultiSelectField',
            'label-message' => 'logeventslist-more-filters',
            'flatlist' => true,
            'options' => $options,
            'default' => $default,
        ];
    }

    private function getDefaultQuery() {
        if ( !isset( $this->mDefaultQuery ) ) {
            $this->mDefaultQuery = $this->getRequest()->getQueryValues();
            unset( $this->mDefaultQuery['title'] );
            unset( $this->mDefaultQuery['dir'] );
            unset( $this->mDefaultQuery['offset'] );
            unset( $this->mDefaultQuery['limit'] );
            unset( $this->mDefaultQuery['order'] );
            unset( $this->mDefaultQuery['month'] );
            unset( $this->mDefaultQuery['year'] );
        }

        return $this->mDefaultQuery;
    }

    private function getTypeMenuDesc( $queryTypes ) {
        $queryType = count( $queryTypes ) == 1 ? $queryTypes[0] : '';

        $typesByName = []; // Temporary array
        // First pass to load the log names
        foreach ( LogPage::validTypes() as $type ) {
            $page = new LogPage( $type );
            $restriction = $page->getRestriction();
            if ( $this->getUser()->isAllowed( $restriction ) ) {
                $typesByName[$type] = $page->getName()->text();
            }
        }

        // Second pass to sort by name
        asort( $typesByName );

        // Always put "All public logs" on top
        $public = $typesByName[''];
        unset( $typesByName[''] );
        $typesByName = [ '' => $public ] + $typesByName;

        return [
            'class' => 'HTMLSelectField',
            'name' => 'type',
            'options' => array_flip( $typesByName ),
            'default' => $queryType,
        ];
    }

    private function getUserInputDesc( $user ) {
        return [
            'class' => 'HTMLUserTextField',
            'label-message' => 'specialloguserlabel',
            'name' => 'user',
            'default' => $user,
        ];
    }

    private function getTitleInputDesc( $title ) {
        return [
            'class' => 'HTMLTitleTextField',
            'label-message' => 'speciallogtitlelabel',
            'name' => 'page',
            'required' => false
        ];
    }

    private function getTitlePatternDesc( $pattern ) {
        return [
            'type' => 'check',
            'label-message' => 'log-title-wildcard',
            'name' => 'pattern',
        ];
    }

    private function getExtraInputsDesc( $types ) {
        if ( count( $types ) == 1 ) {
            if ( $types[0] == 'suppress' ) {
                return [
                    'type' => 'text',
                    'label-message' => 'revdelete-offender',
                    'name' => 'offender',
                ];
            } else {
                // Allow extensions to add their own extra inputs
                // This could be an array or string. See T199495.
                $input = ''; // Deprecated
                $formDescriptor = [];
                Hooks::run( 'LogEventsListGetExtraInputs', [ $types[0], $this, &$input, &$formDescriptor ] );

                return empty( $formDescriptor ) ? $input : $formDescriptor;
            }
        }

        return [];
    }

    private function getActionSelectorDesc( $types, $action ) {
        $actionOptions = [];
        $actionOptions[ 'log-action-filter-all' ] = '';

        foreach ( $this->allowedActions as $value ) {
            $msgKey = 'log-action-filter-' . $types[0] . '-' . $value;
            $actionOptions[ $msgKey ] = $value;
        }

        return [
            'class' => 'HTMLSelectField',
            'name' => 'subtype',
            'options-messages' => $actionOptions,
            'default' => $action,
            'label' => $this->msg( 'log-action-filter-' . $types[0] )->text(),
        ];
    }

    public function setAllowedActions( $actions ) {
        $this->allowedActions = $actions;
    }

    public function beginLogEventsList() {
        return "<ul>\n";
    }

    public function endLogEventsList() {
        return "</ul>\n";
    }

    public function logLine( $row ) {
        $entry = DatabaseLogEntry::newFromRow( $row );
        $formatter = LogFormatter::newFromEntry( $entry );
        $formatter->setContext( $this->getContext() );
        $formatter->setLinkRenderer( $this->getLinkRenderer() );
        $formatter->setShowUserToolLinks( !( $this->flags & self::NO_EXTRA_USER_LINKS ) );

        $time = htmlspecialchars( $this->getLanguage()->userTimeAndDate(
            $entry->getTimestamp(), $this->getUser() ) );

        $action = $formatter->getActionText();

        if ( $this->flags & self::NO_ACTION_LINK ) {
            $revert = '';
        } else {
            $revert = $formatter->getActionLinks();
            if ( $revert != '' ) {
                $revert = '<span class="mw-logevent-actionlink">' . $revert . '</span>';
            }
        }

        $comment = $formatter->getComment();

        // Some user can hide log items and have review links
        $del = $this->getShowHideLinks( $row );

        // Any tags...
        list( $tagDisplay, $newClasses ) = ChangeTags::formatSummaryRow(
            $row->ts_tags,
            'logevent',
            $this->getContext()
        );
        $classes = array_merge(
            [ 'mw-logline-' . $entry->getType() ],
            $newClasses
        );
        $attribs = [
            'data-mw-logid' => $entry->getId(),
            'data-mw-logaction' => $entry->getFullType(),
        ];
        $ret = "$del $time $action $comment $revert $tagDisplay";

        // Let extensions add data
        Hooks::run( 'LogEventsListLineEnding', [ $this, &$ret, $entry, &$classes, &$attribs ] );
        $attribs = array_filter( $attribs,
            [ Sanitizer::class, 'isReservedDataAttribute' ],
            ARRAY_FILTER_USE_KEY
        );
        $attribs['class'] = implode( ' ', $classes );

        return Html::rawElement( 'li', $attribs, $ret ) . "\n";
    }

    private function getShowHideLinks( $row ) {
        // We don't want to see the links and
        if ( $this->flags == self::NO_ACTION_LINK ) {
            return '';
        }

        $user = $this->getUser();

        // If change tag editing is available to this user, return the checkbox
        if ( $this->flags & self::USE_CHECKBOXES && $this->showTagEditUI ) {
            return Xml::check(
                'showhiderevisions',
                false,
                [ 'name' => 'ids[' . $row->log_id . ']' ]
            );
        }

        // no one can hide items from the suppress log.
        if ( $row->log_type == 'suppress' ) {
            return '';
        }

        $del = '';
        // Don't show useless checkbox to people who cannot hide log entries
        if ( $user->isAllowed( 'deletedhistory' ) ) {
            $canHide = $user->isAllowed( 'deletelogentry' );
            $canViewSuppressedOnly = $user->isAllowed( 'viewsuppressed' ) &&
                !$user->isAllowed( 'suppressrevision' );
            $entryIsSuppressed = self::isDeleted( $row, LogPage::DELETED_RESTRICTED );
            $canViewThisSuppressedEntry = $canViewSuppressedOnly && $entryIsSuppressed;
            if ( $row->log_deleted || $canHide ) {
                // Show checkboxes instead of links.
                if ( $canHide && $this->flags & self::USE_CHECKBOXES && !$canViewThisSuppressedEntry ) {
                    // If event was hidden from sysops
                    if ( !self::userCan( $row, LogPage::DELETED_RESTRICTED, $user ) ) {
                        $del = Xml::check( 'deleterevisions', false, [ 'disabled' => 'disabled' ] );
                    } else {
                        $del = Xml::check(
                            'showhiderevisions',
                            false,
                            [ 'name' => 'ids[' . $row->log_id . ']' ]
                        );
                    }
                } else {
                    // If event was hidden from sysops
                    if ( !self::userCan( $row, LogPage::DELETED_RESTRICTED, $user ) ) {
                        $del = Linker::revDeleteLinkDisabled( $canHide );
                    } else {
                        $query = [
                            'target' => SpecialPage::getTitleFor( 'Log', $row->log_type )->getPrefixedDBkey(),
                            'type' => 'logging',
                            'ids' => $row->log_id,
                        ];
                        $del = Linker::revDeleteLink(
                            $query,
                            $entryIsSuppressed,
                            $canHide && !$canViewThisSuppressedEntry
                        );
                    }
                }
            }
        }

        return $del;
    }

    public static function typeAction( $row, $type, $action, $right = '' ) {
        $match = is_array( $type ) ?
            in_array( $row->log_type, $type ) : $row->log_type == $type;
        if ( $match ) {
            $match = is_array( $action ) ?
                in_array( $row->log_action, $action ) : $row->log_action == $action;
            if ( $match && $right ) {
                global $wgUser;
                $match = $wgUser->isAllowed( $right );
            }
        }

        return $match;
    }

    public static function userCan( $row, $field, User $user = null ) {
        return self::userCanBitfield( $row->log_deleted, $field, $user );
    }

    public static function userCanBitfield( $bitfield, $field, User $user = null ) {
        if ( $bitfield & $field ) {
            if ( $user === null ) {
                global $wgUser;
                $user = $wgUser;
            }
            if ( $bitfield & LogPage::DELETED_RESTRICTED ) {
                $permissions = [ 'suppressrevision', 'viewsuppressed' ];
            } else {
                $permissions = [ 'deletedhistory' ];
            }
            $permissionlist = implode( ', ', $permissions );
            wfDebug( "Checking for $permissionlist due to $field match on $bitfield\n" );
            return $user->isAllowedAny( ...$permissions );
        }
        return true;
    }

    public static function isDeleted( $row, $field ) {
        return ( $row->log_deleted & $field ) == $field;
    }

    public static function showLogExtract(
        &$out, $types = [], $page = '', $user = '', $param = []
    ) {
        $defaultParameters = [
            'lim' => 25,
            'conds' => [],
            'showIfEmpty' => true,
            'msgKey' => [ '' ],
            'wrap' => "$1",
            'flags' => 0,
            'useRequestParams' => false,
            'useMaster' => false,
            'extraUrlParams' => false,
        ];
        # The + operator appends elements of remaining keys from the right
        # handed array to the left handed, whereas duplicated keys are NOT overwritten.
        $param += $defaultParameters;
        # Convert $param array to individual variables
        $lim = $param['lim'];
        $conds = $param['conds'];
        $showIfEmpty = $param['showIfEmpty'];
        $msgKey = $param['msgKey'];
        $wrap = $param['wrap'];
        $flags = $param['flags'];
        $extraUrlParams = $param['extraUrlParams'];

        $useRequestParams = $param['useRequestParams'];
        if ( !is_array( $msgKey ) ) {
            $msgKey = [ $msgKey ];
        }

        if ( $out instanceof OutputPage ) {
            $context = $out->getContext();
        } else {
            $context = RequestContext::getMain();
        }

        // FIXME: Figure out how to inject this
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();

        # Insert list of top 50 (or top $lim) items
        $loglist = new LogEventsList( $context, $linkRenderer, $flags );
        $pager = new LogPager( $loglist, $types, $user, $page, '', $conds );
        if ( !$useRequestParams ) {
            # Reset vars that may have been taken from the request
            $pager->mLimit = 50;
            $pager->mDefaultLimit = 50;
            $pager->mOffset = "";
            $pager->mIsBackwards = false;
        }

        if ( $param['useMaster'] ) {
            $pager->mDb = wfGetDB( DB_MASTER );
        }
        if ( isset( $param['offset'] ) ) { # Tell pager to ignore WebRequest offset
            $pager->setOffset( $param['offset'] );
        }

        if ( $lim > 0 ) {
            $pager->mLimit = $lim;
        }
        // Fetch the log rows and build the HTML if needed
        $logBody = $pager->getBody();
        $numRows = $pager->getNumRows();

        $s = '';

        if ( $logBody ) {
            if ( $msgKey[0] ) {
                $dir = $context->getLanguage()->getDir();
                $lang = $context->getLanguage()->getHtmlCode();

                $s = Xml::openElement( 'div', [
                    'class' => "mw-warning-with-logexcerpt mw-content-$dir",
                    'dir' => $dir,
                    'lang' => $lang,
                ] );

                if ( count( $msgKey ) == 1 ) {
                    $s .= $context->msg( $msgKey[0] )->parseAsBlock();
                } else { // Process additional arguments
                    $args = $msgKey;
                    array_shift( $args );
                    $s .= $context->msg( $msgKey[0], $args )->parseAsBlock();
                }
            }
            $s .= $loglist->beginLogEventsList() .
                $logBody .
                $loglist->endLogEventsList();
        } elseif ( $showIfEmpty ) {
            $s = Html::rawElement( 'div', [ 'class' => 'mw-warning-logempty' ],
                $context->msg( 'logempty' )->parse() );
        }

        if ( $numRows > $pager->mLimit ) { # Show "Full log" link
            $urlParam = [];
            if ( $page instanceof Title ) {
                $urlParam['page'] = $page->getPrefixedDBkey();
            } elseif ( $page != '' ) {
                $urlParam['page'] = $page;
            }

            if ( $user != '' ) {
                $urlParam['user'] = $user;
            }

            if ( !is_array( $types ) ) { # Make it an array, if it isn't
                $types = [ $types ];
            }

            # If there is exactly one log type, we can link to Special:Log?type=foo
            if ( count( $types ) == 1 ) {
                $urlParam['type'] = $types[0];
            }

            if ( $extraUrlParams !== false ) {
                $urlParam = array_merge( $urlParam, $extraUrlParams );
            }

            $s .= $linkRenderer->makeKnownLink(
                SpecialPage::getTitleFor( 'Log' ),
                $context->msg( 'log-fulllog' )->text(),
                [],
                $urlParam
            );
        }

        if ( $logBody && $msgKey[0] ) {
            $s .= '</div>';
        }

        if ( $wrap != '' ) { // Wrap message in html
            $s = str_replace( '$1', $s, $wrap );
        }

        /* hook can return false, if we don't want the message to be emitted (Wikia BugId:7093) */
        if ( Hooks::run( 'LogEventsListShowLogExtract', [ &$s, $types, $page, $user, $param ] ) ) {
            // $out can be either an OutputPage object or a String-by-reference
            if ( $out instanceof OutputPage ) {
                $out->addHTML( $s );
            } else {
                $out = $s;
            }
        }

        return $numRows;
    }

    public static function getExcludeClause( $db, $audience = 'public', User $user = null ) {
        global $wgLogRestrictions;

        if ( $audience != 'public' && $user === null ) {
            global $wgUser;
            $user = $wgUser;
        }

        // Reset the array, clears extra "where" clauses when $par is used
        $hiddenLogs = [];

        // Don't show private logs to unprivileged users
        foreach ( $wgLogRestrictions as $logType => $right ) {
            if ( $audience == 'public' || !$user->isAllowed( $right ) ) {
                $hiddenLogs[] = $logType;
            }
        }
        if ( count( $hiddenLogs ) == 1 ) {
            return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
        } elseif ( $hiddenLogs ) {
            return 'log_type NOT IN (' . $db->makeList( $hiddenLogs ) . ')';
        }

        return false;
    }
}