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<?php
/**
* Script to refresh image metadata fields. See also rebuildImages.php
*
* Usage: php refreshImageMetadata.php
*
* Copyright © 2011 Brian Wolff
* http://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
* @author Brian Wolff
* @ingroup Maintenance
*/
require_once( dirname( __FILE__ ) . '/Maintenance.php' );
class RefreshImageMetadata extends Maintenance {
/**
* @var DatabaseBase
*/
protected $dbw;
function __construct() {
parent::__construct();
$this->mDescription = 'Script to update image metadata records';
$this->setBatchSize( 200 );
$this->addOption( 'force', 'Reload metadata from file even if the metadata looks ok', false, false, 'f' );
$this->addOption( 'broken-only', 'Only fix really broken records, leave old but still compatible records alone.' );
$this->addOption( 'verbose', 'Output extra information about each upgraded/non-upgraded file.', false, false, 'v' );
$this->addOption( 'start', 'Name of file to start with', false, true );
$this->addOption( 'end', 'Name of file to end with', false, true );
$this->addOption( 'mime', '(Inefficient!) Only refresh files with this mime type. Can accept wild-card image/*' , false, true );
$this->addOption( 'metadata-contains', '(Inefficient!) Only refresh files where the img_metadata field contains this string. Can be used if its known a specific property was being extracted incorrectly.', false, true );
}
public function execute() {
$force = $this->hasOption( 'force' );
$brokenOnly = $this->hasOption( 'broken-only' );
$verbose = $this->hasOption( 'verbose' );
$start = $this->getOption( 'start', false );
$this->setupParameters( $force, $brokenOnly );
$upgraded = 0;
$leftAlone = 0;
$error = 0;
$dbw = wfGetDB( DB_MASTER );
if ( $this->mBatchSize <= 0 ) {
$this->error( "Batch size is too low...", 12 );
}
$repo = RepoGroup::singleton()->getLocalRepo();
$conds = $this->getConditions( $dbw );
// For the WHERE img_name > 'foo' condition that comes after doing a batch
$conds2 = array();
if ( $start !== false ) {
$conds2[] = 'img_name >= ' . $dbw->addQuotes( $start );
}
$options = array(
'LIMIT' => $this->mBatchSize,
'ORDER BY' => 'img_name ASC',
);
do {
$res = $dbw->select(
'image',
'*',
array_merge( $conds, $conds2 ),
__METHOD__,
$options
);
if ( $res->numRows() > 0 ) {
$row1 = $res->current();
$this->output( "Processing next {$this->mBatchSize} rows starting with {$row1->img_name}.\n");
$res->rewind();
} else {
$this->error( "No images to process.", 4 );
}
foreach ( $res as $row ) {
$file = $repo->newFileFromRow( $row );
if ( $file->getUpgraded() ) {
// File was upgraded.
$upgraded++;
$newLength = strlen( $file->getMetadata() );
$oldLength = strlen( $row->img_metadata );
if ( $newLength < $oldLength - 5 ) {
// If after updating, the metadata is smaller then
// what it was before, that's probably not a good thing
// because we extract more data with time, not less.
// Thus this probably indicates an error of some sort,
// or at the very least is suspicious. Have the - 5 just
// to weed out any inconsequential changes.
$error++;
$this->output( "Warning: File:{$row->img_name} used to have " .
"$oldLength bytes of metadata but now has $newLength bytes.\n" );
} elseif ( $verbose ) {
$this->output("Refreshed File:{$row->img_name}.\n" );
}
} else {
$leftAlone++;
if ( $force ) {
$file->upgradeRow();
$newLength = strlen( $file->getMetadata() );
$oldLength = strlen( $row->img_metadata );
if ( $newLength < $oldLength - 5 ) {
$error++;
$this->output( "Warning: File:{$row->img_name} used to have " .
"$oldLength bytes of metadata but now has $newLength bytes. (forced)\n" );
}
if ( $verbose ) {
$this->output("Forcibly refreshed File:{$row->img_name}.\n" );
}
}
else {
if ( $verbose ) {
$this->output( "Skipping File:{$row->img_name}.\n" );
}
}
}
}
$conds2 = array( 'img_name > ' . $dbw->addQuotes( $row->img_name ) );
wfWaitForSlaves();
} while( $res->numRows() === $this->mBatchSize );
$total = $upgraded + $leftAlone;
if ( $force ) {
$this->output( "\nFinished refreshing file metadata for $total files. $upgraded needed to be refreshed, $leftAlone did not need to be but were refreshed anyways, and $error refreshes were suspicious.\n" );
} else {
$this->output( "\nFinished refreshing file metadata for $total files. $upgraded were refreshed, $leftAlone were already up to date, and $error refreshes were suspicious.\n" );
}
}
/**
* @param $dbw DatabaseBase
* @return array
*/
function getConditions( $dbw ) {
$conds = array();
$end = $this->getOption( 'end', false );
$mime = $this->getOption( 'mime', false );
$like = $this->getOption( 'metadata-contains', false );
if ( $end !== false ) {
$conds[] = 'img_name <= ' . $dbw->addQuotes( $end ) ;
}
if ( $mime !== false ) {
list( $major, $minor ) = File::splitMime( $mime );
$conds['img_major_mime'] = $major;
if ( $minor !== '*' ) {
$conds['img_minor_mime'] = $minor;
}
}
if ( $like ) {
$conds[] = 'img_metadata ' . $dbw->buildLike( $dbw->anyString(), $like, $dbw->anyString() );
}
return $conds;
}
/**
* @param $force bool
* @param $brokenOnly bool
*/
function setupParameters( $force, $brokenOnly ) {
global $wgUpdateCompatibleMetadata;
if ( $brokenOnly ) {
$wgUpdateCompatibleMetadata = false;
} else {
$wgUpdateCompatibleMetadata = true;
}
if ( $brokenOnly && $force ) {
$this->error( 'Cannot use --broken-only and --force together. ', 2 );
}
}
}
$maintClass = 'RefreshImageMetadata';
require_once( RUN_MAINTENANCE_IF_MAIN );
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