mediawiki-extensions-AbuseF.../AbuseFilter.hooks.php

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<?php
class AbuseFilterHooks {
static $successful_action_vars = false;
/** @var WikiPage|Article|bool */
static $last_edit_page = false; // make sure edit filter & edit save hooks match
// So far, all of the error message out-params for these hooks accept HTML.
// Hooray!
/**
* Entry point for the APIEditBeforeSave hook.
* This is needed to give a useful error for API edits (Bug 32216)
*
* @see https://www.mediawiki.org/wiki/Manual:Hooks/APIEditBeforeSave
*
* @param EditPage $editPage
* @param string $text New text of the article (has yet to be saved)
* @param array &$result Data in this array will be added to the API result
*
* @return bool
*/
public static function onAPIEditBeforeSave( $editPage, $text, &$result ) {
$context = $editPage->mArticle->getContext();
$status = Status::newGood();
$minoredit = $editPage->minoredit;
$summary = $editPage->summary;
// poor man's PST, see bug 20310
$text = str_replace( "\r\n", "\n", $text );
self::filterEdit( $context, null, $text, $status, $summary, $minoredit );
if ( !$status->isOK() ) {
$msg = $status->getErrorsArray();
$msg = $msg[0];
// Use the error message key name as error code, the first parameter is the filter description.
if ( $msg instanceof Message ) {
// For forward compatibility: In case we switch over towards using Message objects someday.
// (see the todo for AbuseFilter::buildStatus)
$code = $msg->getKey();
$filterDescription = $msg->getParams();
$filterDescription = $filterDescription[0];
$warning = $msg->parse();
} else {
$code = array_shift( $msg );
$filterDescription = $msg[0];
$warning = wfMessage( $code )->params( $msg )->parse();
}
$result = array(
'code' => $code,
'info' => 'Hit AbuseFilter: ' . $filterDescription,
'warning' => $warning
);
}
return $status->isOK();
}
/**
* Entry points for MediaWiki hook 'EditFilterMerged' (MW 1.20 and earlier)
*
* @param $editor EditPage instance (object)
* @param $text string Content of the edit box
* @param &$error string Error message to return
* @param $summary string Edit summary for page
* @return bool
*/
public static function onEditFilterMerged( $editor, $text, &$error, $summary ) {
$context = $editor->mArticle->getContext();
$status = Status::newGood();
$minoredit = $editor->minoredit;
// poor man's PST, see bug 20310
$text = str_replace( "\r\n", "\n", $text );
$continue = self::filterEdit( $context, null, $text, $status, $summary, $minoredit );
if ( !$status->isOK() ) {
$error = $status->getWikiText();
}
return $continue;
}
/**
* Entry points for MediaWiki hook 'EditFilterMergedContent' (MW 1.21 and later)
*
* @param IContextSource $context the context of the edit
* @param Content $content the new Content generated by the edit
* @param Status $status Error message to return
* @param string $summary Edit summary for page
* @param User $user the user performing the edit
* @param bool $minoredit whether this is a minor edit according to the user.
*
* @return bool
*/
public static function onEditFilterMergedContent( IContextSource $context, Content $content,
Status $status, $summary, User $user, $minoredit ) {
$text = AbuseFilter::contentToString( $content, Revision::RAW );
$continue = self::filterEdit( $context, $content, $text, $status, $summary, $minoredit );
return $continue;
}
/**
* Common implementation for the APIEditBeforeSave, EditFilterMerged
* and EditFilterMergedContent hooks.
*
* @param IContextSource $context the context of the edit
* @param Content|null $content the new Content generated by the edit
* @param string $text new page content (subject of filtering)
* @param Status $status Error message to return
* @param string $summary Edit summary for page
* @param bool $minoredit whether this is a minor edit according to the user.
*
* @return bool
*/
public static function filterEdit( IContextSource $context, $content, $text,
Status $status, $summary, $minoredit ) {
// Load vars
$vars = new AbuseFilterVariableHolder();
$title = $context->getTitle();
// Some edits are running through multiple hooks, but we only want to filter them once
if ( isset( $title->editAlreadyFiltered ) ) {
return true;
} elseif ( $title ) {
$title->editAlreadyFiltered = true;
}
self::$successful_action_vars = false;
self::$last_edit_page = false;
$user = $context->getUser();
$oldtext = '';
if ( ( $title instanceof Title ) && $title->canExist() && $title->exists() ) {
// Make sure we load the latest text saved in database (bug 31656)
$page = $context->getWikiPage();
$revision = $page->getRevision();
if ( !$revision ) {
return true;
}
if ( defined( 'MW_SUPPORTS_CONTENTHANDLER' ) ) {
$oldcontent = $revision->getContent( Revision::RAW );
$oldtext = AbuseFilter::contentToString( $oldcontent );
} else {
$oldtext = AbuseFilter::revisionToString( $revision, Revision::RAW );
}
// Cache article object so we can share a parse operation
$articleCacheKey = $title->getNamespace() . ':' . $title->getText();
AFComputedVariable::$articleCache[$articleCacheKey] = $page;
// Don't trigger for null edits.
if ( $content && isset( $oldcontent ) && $content->equals( $oldcontent ) ) {
// Compare Content objects if available
return true;
} elseif ( strcmp( $oldtext, $text ) == 0 ) {
// Otherwise, compare strings
return true;
}
} else {
$page = null;
}
$vars->addHolders(
AbuseFilter::generateUserVars( $user ),
AbuseFilter::generateTitleVars( $title , 'ARTICLE' )
);
$vars->setVar( 'action', 'edit' );
$vars->setVar( 'summary', $summary );
$vars->setVar( 'minor_edit', $minoredit );
$vars->setVar( 'old_wikitext', $oldtext );
$vars->setVar( 'new_wikitext', $text );
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// TODO: set old_content and new_content vars, use them
$vars->addHolders( AbuseFilter::getEditVars( $title, $page ) );
$filter_result = AbuseFilter::filterAction( $vars, $title );
if ( !$filter_result->isOK() ) {
$status->merge( $filter_result );
return true; // re-show edit form
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}
self::$successful_action_vars = $vars;
self::$last_edit_page = $page;
return true;
}
public static function onArticleSaveComplete(
&$article, &$user, $text, $summary, $minoredit, $watchthis, $sectionanchor,
&$flags, $revision
) {
if ( ! self::$successful_action_vars || ! $revision ) {
self::$successful_action_vars = false;
return true;
}
$vars = self::$successful_action_vars;
if ( $vars->getVar('article_prefixedtext')->toString() !==
$article->getTitle()->getPrefixedText()
) {
return true;
}
if ( !self::identicalPageObjects( $article, self::$last_edit_page ) ) {
return true; // this isn't the edit $successful_action_vars was set for
}
self::$last_edit_page = false;
if ( $vars->getVar('local_log_ids') ) {
// Now actually do our storage
$log_ids = $vars->getVar('local_log_ids')->toNative();
$dbw = wfGetDB( DB_MASTER );
if ( count($log_ids) ) {
$dbw->update( 'abuse_filter_log',
array( 'afl_rev_id' => $revision->getId() ),
array( 'afl_id' => $log_ids ),
__METHOD__
);
}
}
if ( $vars->getVar('global_log_ids') ) {
$log_ids = $vars->getVar('global_log_ids')->toNative();
if ( count($log_ids) ) {
global $wgAbuseFilterCentralDB;
$fdb = wfGetDB( DB_MASTER, array(), $wgAbuseFilterCentralDB );
$fdb->update( 'abuse_filter_log',
array( 'afl_rev_id' => $revision->getId() ),
array( 'afl_id' => $log_ids, 'afl_wiki' => wfWikiId() ),
__METHOD__
);
}
}
return true;
}
/**
* Check if two article objects are identical or have an identical WikiPage
* @param $page1 Article|WikiPage
* @param $page2 Article|WikiPage
* @return bool
*/
protected static function identicalPageObjects( $page1, $page2 ) {
if ( method_exists('Article', 'getPage') ) {
$wpage1 = ( $page1 instanceof Article ) ? $page1->getPage() : $page1;
$wpage2 = ( $page2 instanceof Article ) ? $page2->getPage() : $page2;
return ( $wpage1 === $wpage2 );
} else { // b/c for before WikiPage
return ( $page1 === $page2 ); // should be two Article objects
}
}
/**
* @param $user
* @param $promote
* @return bool
*/
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public static function onGetAutoPromoteGroups( $user, &$promote ) {
global $wgMemc;
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$key = AbuseFilter::autoPromoteBlockKey( $user );
if ( $wgMemc->get( $key ) ) {
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$promote = array();
}
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return true;
}
public static function onMovePageCheckPermissions( Title $oldTitle, Title $newTitle, User $user, $reason, Status $status ) {
$vars = new AbuseFilterVariableHolder;
$vars->addHolders(
AbuseFilter::generateUserVars( $user ),
AbuseFilter::generateTitleVars( $oldTitle, 'MOVED_FROM' ),
AbuseFilter::generateTitleVars( $newTitle, 'MOVED_TO' )
);
$vars->setVar( 'SUMMARY', $reason );
$vars->setVar( 'ACTION', 'move' );
$result = AbuseFilter::filterAction( $vars, $oldTitle );
$status->merge( $result );
return $result->isOK();
}
/**
* @param $oldTitle Title
* @param $newTitle Title
* @param $user User
* @param $error
* @param $reason
* @return bool
*/
public static function onAbortMove( $oldTitle, $newTitle, $user, &$error, $reason ) {
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global $wgUser;
// HACK: This is a secret userright so system actions
// can bypass AbuseFilter. Should not be assigned to
// normal users. This should be turned into a proper
// userright in bug 67936.
if ( $wgUser->isAllowed( 'abusefilter-bypass' ) ) {
return true;
}
$status = new Status();
self::onMovePageCheckPermissions( $oldTitle, $newTitle, $wgUser, $reason, $status );
if ( !$status->isOK() ) {
$error = $status->getHTML();
}
return $status->isOK();
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}
/**
* @param $article Article
* @param $user User
* @param $reason string
* @param $error
* @param $status
* @return bool
*/
public static function onArticleDelete( &$article, &$user, &$reason, &$error, &$status ) {
$vars = new AbuseFilterVariableHolder;
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global $wgUser;
$vars->addHolders(
AbuseFilter::generateUserVars( $wgUser ),
AbuseFilter::generateTitleVars( $article->getTitle(), 'ARTICLE' )
);
$vars->setVar( 'SUMMARY', $reason );
$vars->setVar( 'ACTION', 'delete' );
$filter_result = AbuseFilter::filterAction( $vars, $article->getTitle() );
$status->merge( $filter_result );
$error = $filter_result->isOK() ? '' : $filter_result->getHTML();
return $filter_result->isOK();
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}
/**
* @param $user User
* @param $message
* @param $autocreate bool Indicates whether the account is created automatically.
* @return bool
*/
private static function checkNewAccount( $user, &$message, $autocreate ) {
if ( $user->getName() == wfMessage( 'abusefilter-blocker' )->inContentLanguage()->text() ) {
$message = wfMessage( 'abusefilter-accountreserved' )->text();
return false;
}
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$vars = new AbuseFilterVariableHolder;
// Add variables only for a registered user, so IP addresses of
// new users won't be exposed
global $wgUser;
if ( $wgUser->getId() ) {
$vars->addHolders( AbuseFilter::generateUserVars( $wgUser ) );
}
$vars->setVar( 'ACTION', $autocreate ? 'autocreateaccount' : 'createaccount' );
$vars->setVar( 'ACCOUNTNAME', $user->getName() );
$filter_result = AbuseFilter::filterAction(
$vars, SpecialPage::getTitleFor( 'Userlogin' ) );
$message = $filter_result->isOK() ? '' : $filter_result->getWikiText();
return $filter_result->isOK();
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}
/**
* @param $user User
* @param $message
* @return bool
*/
public static function onAbortNewAccount( $user, &$message ) {
return self::checkNewAccount( $user, $message, false );
}
/**
* @param $user User
* @param $message
* @return bool
*/
public static function onAbortAutoAccount( $user, &$message ) {
// FIXME: ERROR MESSAGE IS SHOWN IN A WEIRD WAY, BEACUSE $message
// HERE MEANS NAME OF THE MESSAGE, NOT THE TEXT OF THE MESSAGE AS
// IN AbortNewAccount HOOK WHICH WE CANNOT PROVIDE!
return self::checkNewAccount( $user, $message, true );
}
/**
* @param $recentChange RecentChange
* @return bool
*/
public static function onRecentChangeSave( $recentChange ) {
$title = Title::makeTitle(
$recentChange->getAttribute( 'rc_namespace' ),
$recentChange->getAttribute( 'rc_title' )
);
$action = $recentChange->mAttribs['rc_log_type'] ?
$recentChange->mAttribs['rc_log_type'] : 'edit';
$actionID = implode( '-', array(
$title->getPrefixedText(), $recentChange->mAttribs['rc_user_text'], $action
) );
if ( !empty( AbuseFilter::$tagsToSet[$actionID] )
&& count( $tags = AbuseFilter::$tagsToSet[$actionID] ) )
{
ChangeTags::addTags(
$tags,
$recentChange->mAttribs['rc_id'],
$recentChange->mAttribs['rc_this_oldid'],
$recentChange->mAttribs['rc_logid']
);
}
return true;
}
/**
* @param array $tags
* @param bool $enabled
* @return bool
*/
private static function fetchAllTags( array &$tags, $enabled ) {
# This is a pretty awful hack.
$dbr = wfGetDB( DB_SLAVE );
$where = array( 'afa_consequence' => 'tag' );
if ( $enabled ) {
$where['af_enabled'] = true;
}
$res = $dbr->select(
array( 'abuse_filter_action', 'abuse_filter' ),
'afa_parameters',
$where,
__METHOD__,
array(),
array( 'abuse_filter' => array( 'INNER JOIN', 'afa_filter=af_id' ) )
);
foreach ( $res as $row ) {
$tags = array_filter(
array_merge( explode( "\n", $row->afa_parameters ), $tags )
);
}
return true;
}
/**
* @param array $tags
* @return bool
*/
public static function onListDefinedTags( array &$tags ) {
return self::fetchAllTags( $tags, false );
}
/**
* @param array $tags
* @return bool
*/
public static function onChangeTagsListActive( array &$tags ) {
return self::fetchAllTags( $tags, true );
}
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/**
* @param $updater DatabaseUpdater
* @throws MWException
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* @return bool
*/
public static function onLoadExtensionSchemaUpdates( $updater = null ) {
$dir = dirname( __FILE__ );
if ( $updater->getDB()->getType() == 'mysql' || $updater->getDB()->getType() == 'sqlite' ) {
if ( $updater->getDB()->getType() == 'mysql' ) {
$updater->addExtensionUpdate( array( 'addTable', 'abuse_filter', "$dir/abusefilter.tables.sql", true ) );
$updater->addExtensionUpdate( array( 'addTable', 'abuse_filter_history', "$dir/db_patches/patch-abuse_filter_history.sql", true ) );
} else {
$updater->addExtensionUpdate( array( 'addTable', 'abuse_filter', "$dir/abusefilter.tables.sqlite.sql", true ) );
$updater->addExtensionUpdate( array( 'addTable', 'abuse_filter_history', "$dir/db_patches/patch-abuse_filter_history.sqlite.sql", true ) );
}
$updater->addExtensionUpdate( array( 'addField', 'abuse_filter_history', 'afh_changed_fields', "$dir/db_patches/patch-afh_changed_fields.sql", true ) );
$updater->addExtensionUpdate( array( 'addField', 'abuse_filter', 'af_deleted', "$dir/db_patches/patch-af_deleted.sql", true ) );
$updater->addExtensionUpdate( array( 'addField', 'abuse_filter', 'af_actions', "$dir/db_patches/patch-af_actions.sql", true ) );
$updater->addExtensionUpdate( array( 'addField', 'abuse_filter', 'af_global', "$dir/db_patches/patch-global_filters.sql", true ) );
$updater->addExtensionUpdate( array( 'addField', 'abuse_filter_log', 'afl_rev_id', "$dir/db_patches/patch-afl_action_id.sql", true ) );
if ( $updater->getDB()->getType() == 'mysql' ) {
$updater->addExtensionUpdate( array( 'addIndex', 'abuse_filter_log', 'filter_timestamp', "$dir/db_patches/patch-fix-indexes.sql", true ) );
} else {
$updater->addExtensionUpdate( array( 'addIndex', 'abuse_filter_log', 'afl_filter_timestamp', "$dir/db_patches/patch-fix-indexes.sqlite.sql", true ) );
}
$updater->addExtensionUpdate( array('addField', 'abuse_filter', 'af_group', "$dir/db_patches/patch-af_group.sql", true ) );
if ( $updater->getDB()->getType() == 'mysql' ) {
$updater->addExtensionUpdate( array( 'addIndex', 'abuse_filter_log', 'wiki_timestamp', "$dir/db_patches/patch-global_logging_wiki-index.sql", true ) );
} else {
$updater->addExtensionUpdate( array( 'addIndex', 'abuse_filter_log', 'afl_wiki_timestamp', "$dir/db_patches/patch-global_logging_wiki-index.sqlite.sql", true ) );
}
if ( $updater->getDB()->getType() == 'mysql' ) {
$updater->addExtensionUpdate( array( 'modifyField', 'abuse_filter_log', 'afl_namespace', "$dir/db_patches/patch-afl-namespace_int.sql", true ) );
} else {
//$updater->addExtensionUpdate( array( 'modifyField', 'abuse_filter_log', 'afl_namespace', "$dir/db_patches/patch-afl-namespace_int.sqlite.sql", true ) );
/*
TODO: modify a column in sqlite, which do not support such things
create backup, drop, create with new schema, copy, drop backup
or simply see https://www.mediawiki.org/wiki/Manual:SQLite#About_SQLite :
Several extensions are known to have database update or installation issues with SQLite: AbuseFilter, ...
*/
}
} elseif ( $updater->getDB()->getType() == 'postgres' ) {
$updater->addExtensionUpdate( array( 'addTable', 'abuse_filter', "$dir/abusefilter.tables.pg.sql", true ) );
$updater->addExtensionUpdate( array( 'addTable', 'abuse_filter_history', "$dir/db_patches/patch-abuse_filter_history.pg.sql", true ) );
$updater->addExtensionUpdate( array( 'addPgField', 'abuse_filter', 'af_actions', "TEXT NOT NULL DEFAULT ''" ) );
$updater->addExtensionUpdate( array( 'addPgField', 'abuse_filter', 'af_deleted', 'SMALLINT NOT NULL DEFAULT 0' ) );
$updater->addExtensionUpdate( array( 'addPgField', 'abuse_filter', 'af_global', 'SMALLINT NOT NULL DEFAULT 0' ) );
$updater->addExtensionUpdate( array( 'addPgField', 'abuse_filter_log', 'afl_wiki', 'TEXT' ) );
$updater->addExtensionUpdate( array( 'addPgField', 'abuse_filter_log', 'afl_deleted', 'SMALLINT' ) );
$updater->addExtensionUpdate( array( 'changeField', 'abuse_filter_log', 'afl_filter', 'TEXT', '' ) );
$updater->addExtensionUpdate( array( 'addPgExtIndex', 'abuse_filter_log', 'abuse_filter_log_ip', "(afl_ip)" ) );
$updater->addExtensionUpdate( array( 'addPgExtIndex', 'abuse_filter_log', 'abuse_filter_log_wiki', "(afl_wiki)" ) );
$updater->addExtensionUpdate( array( 'changeField', 'abuse_filter_log', 'afl_namespace', "INTEGER" ) );
}
$updater->addExtensionUpdate( array( array( __CLASS__, 'createAbuseFilterUser' ) ) );
return true;
}
/**
* Updater callback to create the AbuseFilter user after the user tables have been updated.
* @param $updater DatabaseUpdater
*/
public static function createAbuseFilterUser( $updater ) {
$user = User::newFromName( wfMessage( 'abusefilter-blocker' )->inContentLanguage()->text() );
if ( $user && !$updater->updateRowExists( 'create abusefilter-blocker-user' ) ) {
if ( !$user->getId() ) {
$user->addToDatabase();
$user->saveSettings();
# Increment site_stats.ss_users
$ssu = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
$ssu->doUpdate();
} else {
// Sorry dude, we need this account.
$user->setPassword( null );
$user->setEmail( null );
$user->saveSettings();
}
$updater->insertUpdateRow( 'create abusefilter-blocker-user' );
# Promote user so it doesn't look too crazy.
$user->addGroup( 'sysop' );
}
}
/**
* @param $id
* @param $nt Title
* @param $tools
* @return bool
*/
public static function onContributionsToolLinks( $id, $nt, &$tools ) {
global $wgUser;
if ( $wgUser->isAllowed( 'abusefilter-log' ) ) {
$tools[] = Linker::link(
SpecialPage::getTitleFor( 'AbuseLog' ),
wfMessage( 'abusefilter-log-linkoncontribs' )->text(),
array( 'title' => wfMessage( 'abusefilter-log-linkoncontribs-text' )->parse() ),
array( 'wpSearchUser' => $nt->getText() )
);
}
return true;
}
/**
* Handler for the UploadVerifyFile hook
*
* @param $upload UploadBase
* @param $mime
* @param $error array
*
* @return bool
*/
public static function onUploadVerifyFile( $upload, $mime, &$error ) {
global $wgUser, $wgVersion;
$vars = new AbuseFilterVariableHolder;
$title = $upload->getTitle();
if ( !$title ) {
// If there's no valid title assigned to the upload
// it wont proceed anyway, so no point in filtering it.
return true;
}
$vars->addHolders(
AbuseFilter::generateUserVars( $wgUser ),
AbuseFilter::generateTitleVars( $title, 'FILE' )
);
$vars->setVar( 'ACTION', 'upload' );
// We us the hexadecimal version of the file sha1
if ( version_compare( $wgVersion, '1.21', '>=' ) ) {
// Use UploadBase::getTempFileSha1Base36 so that we don't have to calculate the sha1 sum again
$sha1 = wfBaseConvert( $upload->getTempFileSha1Base36() , 36, 16, 40 );
} else {
// UploadBase::getTempFileSha1Base36 wasn't public until 1.21
$sha1 = sha1_file( $upload->getTempPath() );
}
$vars->setVar( 'file_sha1', $sha1 );
$vars->setVar( 'file_size', $upload->getFileSize() );
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$filter_result = AbuseFilter::filterAction( $vars, $title );
if ( !$filter_result->isOK() ) {
$error = $filter_result->getErrorsArray();
$error = $error[0];
}
return $filter_result->isOK();
}
/**
* Adds global variables to the Javascript as needed
*
* @param array $vars
* @return bool
*/
public static function onMakeGlobalVariablesScript( array &$vars ) {
if ( isset( AbuseFilter::$editboxName ) && AbuseFilter::$editboxName !== null ) {
$vars['abuseFilterBoxName'] = AbuseFilter::$editboxName;
}
if ( AbuseFilterViewExamine::$examineType !== null ) {
$vars['abuseFilterExamine'] = array(
'type' => AbuseFilterViewExamine::$examineType,
'id' => AbuseFilterViewExamine::$examineId,
);
}
return true;
}
/**
* Tables that Extension:UserMerge needs to update
*
* @param array $updateFields
* @return bool
*/
public static function onUserMergeAccountFields( array &$updateFields ) {
$updateFields[] = array( 'abuse_filter', 'af_user', 'af_user_text' );
$updateFields[] = array( 'abuse_filter_log', 'afl_user', 'afl_user_text' );
$updateFields[] = array( 'abuse_filter_history', 'afh_user', 'afh_user_text' );
return true;
}
/**
* Hook to add PHPUnit test cases.
* @see https://www.mediawiki.org/wiki/Manual:Hooks/UnitTestsList
*
* @param array $files
*
* @return bool
*/
public static function onUnitTestsList( array &$files ) {
$testDir = __DIR__ . '/tests/phpunit';
$files = array_merge(
$files,
glob( $testDir . '/*Test.php' )
);
return true;
}
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}