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<?php
/**
* Revision/log/file deletion backend
*
* 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
* @ingroup RevisionDelete
*/
/**
* Temporary b/c interface, collection of static functions.
* @ingroup SpecialPage
* @ingroup RevisionDelete
*/
class RevisionDeleter {
/**
* Checks for a change in the bitfield for a certain option and updates the
* provided array accordingly.
*
* @param string $desc 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 array $arr 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
* keys describing the items that were hidden, $arr[1] will contain
* an array of keys describing the items that were unhidden, and $arr[2]
* will contain an array with a single message key, which can be one of
* "revdelete-restricted", "revdelete-unrestricted" indicating (un)suppression
* or null to indicate nothing in particular.
* You can turn the keys in $arr[0] and $arr[1] into message keys by
* appending -hid and and -unhid to the keys respectively.
*
* @param $n Integer: the new bitfield.
* @param $o Integer: the old bitfield.
* @return array An array as described above.
* @since 1.19 public
*/
public 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;
}
/** Get DB field name for URL param...
* Future code for other things may also track
* other types of revision-specific changes.
* @return 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'];
return call_user_func( array( $class, 'getRelationType' ) );
} 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.
*
* @param $title Title
* @param $revid
* @return bool|mixed
*/
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;
}
}
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