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<?php
/**
* Revision/log/file deletion backend
*
* @file
*/
/**
* Temporary b/c interface, collection of static functions.
* @ingroup SpecialPage
*/
class RevisionDeleter {
/**
* Checks for a change in the bitfield for a certain option and updates the
* provided array accordingly.
*
* @param $desc String: description to add to the array if the option was
* enabled / disabled.
* @param $field Integer: the bitmask describing the single option.
* @param $diff Integer: the xor of the old and new bitfields.
* @param $new Integer: the new bitfield
* @param $arr Array: the array to update.
*/
protected static function checkItem( $desc, $field, $diff, $new, &$arr ) {
if( $diff & $field ) {
$arr[ ( $new & $field ) ? 0 : 1 ][] = $desc;
}
}
/**
* Gets an array of message keys describing the changes made to the visibility
* of the revision. If the resulting array is $arr, then $arr[0] will contain an
* array of strings describing the items that were hidden, $arr[2] will contain
* an array of strings describing the items that were unhidden, and $arr[3] will
* contain an array with a single string, which can be one of "applied
* restrictions to sysops", "removed restrictions from sysops", or null.
*
* @param $n Integer: the new bitfield.
* @param $o Integer: the old bitfield.
* @return An array as described above.
*/
protected static function getChanges( $n, $o ) {
$diff = $n ^ $o;
$ret = array( 0 => array(), 1 => array(), 2 => array() );
// Build bitfield changes in language
self::checkItem( 'revdelete-content',
Revision::DELETED_TEXT, $diff, $n, $ret );
self::checkItem( 'revdelete-summary',
Revision::DELETED_COMMENT, $diff, $n, $ret );
self::checkItem( 'revdelete-uname',
Revision::DELETED_USER, $diff, $n, $ret );
// Restriction application to sysops
if( $diff & Revision::DELETED_RESTRICTED ) {
if( $n & Revision::DELETED_RESTRICTED )
$ret[2][] = 'revdelete-restricted';
else
$ret[2][] = 'revdelete-unrestricted';
}
return $ret;
}
/**
* Gets a log message to describe the given revision visibility change. This
* message will be of the form "[hid {content, edit summary, username}];
* [unhid {...}][applied restrictions to sysops] for $count revisions: $comment".
*
* @param $count Integer: The number of effected revisions.
* @param $nbitfield Integer: The new bitfield for the revision.
* @param $obitfield Integer: The old bitfield for the revision.
* @param $isForLog Boolean
* @param $forContent Boolean
*/
public static function getLogMessage( $count, $nbitfield, $obitfield, $isForLog = false, $forContent = false ) {
global $wgLang, $wgContLang;
$lang = $forContent ? $wgContLang : $wgLang;
$msgFunc = $forContent ? "wfMsgForContent" : "wfMsg";
$changes = self::getChanges( $nbitfield, $obitfield );
array_walk($changes, 'RevisionDeleter::expandMessageArray', $forContent);
$changesText = array();
if( count( $changes[0] ) ) {
$changesText[] = $msgFunc( 'revdelete-hid', $lang->commaList( $changes[0] ) );
}
if( count( $changes[1] ) ) {
$changesText[] = $msgFunc( 'revdelete-unhid', $lang->commaList( $changes[1] ) );
}
$s = $lang->semicolonList( $changesText );
if( count( $changes[2] ) ) {
$s .= $s ? ' (' . $changes[2][0] . ')' : ' ' . $changes[2][0];
}
$msg = $isForLog ? 'logdelete-log-message' : 'revdelete-log-message';
return wfMsgExt( $msg, $forContent ? array( 'parsemag', 'content' ) : array( 'parsemag' ), $s, $lang->formatNum($count) );
}
private static function expandMessageArray(& $msg, $key, $forContent) {
if ( is_array ($msg) ) {
array_walk($msg, 'RevisionDeleter::expandMessageArray', $forContent);
} else {
if ( $forContent ) {
$msg = wfMsgForContent($msg);
} else {
$msg = wfMsg($msg);
}
}
}
// Get DB field name for URL param...
// Future code for other things may also track
// other types of revision-specific changes.
// @returns string One of log_id/rev_id/fa_id/ar_timestamp/oi_archive_name
public static function getRelationType( $typeName ) {
if ( isset( SpecialRevisionDelete::$deprecatedTypeMap[$typeName] ) ) {
$typeName = SpecialRevisionDelete::$deprecatedTypeMap[$typeName];
}
if ( isset( SpecialRevisionDelete::$allowedTypes[$typeName] ) ) {
$class = SpecialRevisionDelete::$allowedTypes[$typeName]['list-class'];
$list = new $class( null, null, null );
return $list->getIdField();
} else {
return null;
}
}
// Checks if a revision still exists in the revision table.
// If it doesn't, returns the corresponding ar_timestamp field
// so that this key can be used instead.
public static function checkRevisionExistence( $title, $revid ) {
$dbr = wfGetDB( DB_SLAVE );
$exists = $dbr->selectField( 'revision', '1',
array( 'rev_id' => $revid ), __METHOD__ );
if ( $exists ) {
return true;
}
$timestamp = $dbr->selectField( 'archive', 'ar_timestamp',
array( 'ar_namespace' => $title->getNamespace(),
'ar_title' => $title->getDBkey(),
'ar_rev_id' => $revid ), __METHOD__ );
return $timestamp;
}
// Creates utility links for log entries.
public static function getLogLinks( $title, $paramArray, $skin, $messages ) {
global $wgLang;
if( count($paramArray) >= 2 ) {
// Different revision types use different URL params...
$originalKey = $key = $paramArray[0];
// $paramArray[1] is a CSV of the IDs
$Ids = explode( ',', $paramArray[1] );
$revert = array();
// For if undeleted revisions are found amidst deleted ones.
$undeletedRevisions = array();
// This is not going to work if some revs are deleted and some
// aren't.
if ($key == 'revision') {
foreach( $Ids as $k => $id ) {
$existResult =
self::checkRevisionExistence( $title, $id );
if ($existResult !== true) {
$key = 'archive';
$Ids[$k] = $existResult;
} else {
// Undeleted revision amidst deleted ones
unset($Ids[$k]);
$undeletedRevisions[] = $id;
}
}
if ( $key == $originalKey ) {
$Ids = $undeletedRevisions;
$undeletedRevisions = array();
}
}
// Diff link for single rev deletions
if( count($Ids) == 1 && !count($undeletedRevisions) ) {
// Live revision diffs...
if( in_array( $key, array( 'oldid', 'revision' ) ) ) {
$revert[] = $skin->link(
$title,
$messages['diff'],
array(),
array(
'diff' => intval( $Ids[0] ),
'unhide' => 1
),
array( 'known', 'noclasses' )
);
// Deleted revision diffs...
} else if( in_array( $key, array( 'artimestamp','archive' ) ) ) {
$revert[] = $skin->link(
SpecialPage::getTitleFor( 'Undelete' ),
$messages['diff'],
array(),
array(
'target' => $title->getPrefixedDBKey(),
'diff' => 'prev',
'timestamp' => $Ids[0]
),
array( 'known', 'noclasses' )
);
}
}
// View/modify link...
if ( count($undeletedRevisions) ) {
// FIXME THIS IS A HORRIBLE HORRIBLE HACK AND SHOULD DIE
// It's not possible to pass a list of both deleted and
// undeleted revisions to SpecialRevisionDelete, so we're
// stuck with two links. See bug 23363.
$restoreLinks = array();
$restoreLinks[] = $skin->link(
SpecialPage::getTitleFor( 'Revisiondelete' ),
$messages['revdel-restore-visible'],
array(),
array(
'target' => $title->getPrefixedText(),
'type' => $originalKey,
'ids' => implode(',', $undeletedRevisions),
),
array( 'known', 'noclasses' )
);
$restoreLinks[] = $skin->link(
SpecialPage::getTitleFor( 'Revisiondelete' ),
$messages['revdel-restore-deleted'],
array(),
array(
'target' => $title->getPrefixedText(),
'type' => $key,
'ids' => implode(',', $Ids),
),
array( 'known', 'noclasses' )
);
$revert[] = $messages['revdel-restore'] . ' [' .
$wgLang->pipeList( $restoreLinks ) . ']';
} else {
$revert[] = $skin->link(
SpecialPage::getTitleFor( 'Revisiondelete' ),
$messages['revdel-restore'],
array(),
array(
'target' => $title->getPrefixedText(),
'type' => $key,
'ids' => implode(',', $Ids),
),
array( 'known', 'noclasses' )
);
}
// Pipe links
return wfMsg( 'parentheses', $wgLang->pipeList( $revert ) );
}
return '';
}
}
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