updateRestrictions.php

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<?php
require_once( __DIR__ . '/Maintenance.php' );

class UpdateRestrictions extends Maintenance {
        public function __construct() {
                parent::__construct();
                $this->mDescription = "Updates page_restrictions table from old page_restriction column";
                $this->setBatchSize( 100 );
        }

        public function execute() {
                $db = wfGetDB( DB_MASTER );
                if ( !$db->tableExists( 'page_restrictions' ) ) {
                        $this->error( "page_restrictions table does not exist", true );
                }

                $start = $db->selectField( 'page', 'MIN(page_id)', false, __METHOD__ );
                if ( !$start ) {
                        $this->error( "Nothing to do.", true );
                }
                $end = $db->selectField( 'page', 'MAX(page_id)', false, __METHOD__ );

                # Do remaining chunk
                $end += $this->mBatchSize - 1;
                $blockStart = $start;
                $blockEnd = $start + $this->mBatchSize - 1;
                $encodedExpiry = 'infinity';
                while ( $blockEnd <= $end ) {
                        $this->output( "...doing page_id from $blockStart to $blockEnd\n" );
                        $cond = "page_id BETWEEN $blockStart AND $blockEnd AND page_restrictions !=''";
                        $res = $db->select( 'page', array( 'page_id', 'page_namespace', 'page_restrictions' ), $cond, __METHOD__ );
                        $batch = array();
                        foreach ( $res as $row ) {
                                $oldRestrictions = array();
                                foreach ( explode( ':', trim( $row->page_restrictions ) ) as $restrict ) {
                                        $temp = explode( '=', trim( $restrict ) );
                                        // Make sure we are not settings restrictions to ""
                                        if ( count( $temp ) == 1 && $temp[0] ) {
                                                // old old format should be treated as edit/move restriction
                                                $oldRestrictions["edit"] = trim( $temp[0] );
                                                $oldRestrictions["move"] = trim( $temp[0] );
                                        } elseif ( $temp[1] ) {
                                                $oldRestrictions[$temp[0]] = trim( $temp[1] );
                                        }
                                }
                                # Clear invalid columns
                                if ( $row->page_namespace == NS_MEDIAWIKI ) {
                                        $db->update( 'page', array( 'page_restrictions' => '' ),
                                                array( 'page_id' => $row->page_id ), __FUNCTION__ );
                                        $this->output( "...removed dead page_restrictions column for page {$row->page_id}\n" );
                                }
                                # Update restrictions table
                                foreach ( $oldRestrictions as $action => $restrictions ) {
                                        $batch[] = array(
                                                'pr_page' => $row->page_id,
                                                'pr_type' => $action,
                                                'pr_level' => $restrictions,
                                                'pr_cascade' => 0,
                                                'pr_expiry' => $encodedExpiry
                                        );
                                }
                        }
                        # We use insert() and not replace() as Article.php replaces
                        # page_restrictions with '' when protected in the restrictions table
                        if ( count( $batch ) ) {
                                $ok = $db->deadlockLoop( array( $db, 'insert' ), 'page_restrictions',
                                        $batch, __FUNCTION__, array( 'IGNORE' ) );
                                if ( !$ok ) {
                                        throw new MWException( "Deadlock loop failed wtf :(" );
                                }
                        }
                        $blockStart += $this->mBatchSize - 1;
                        $blockEnd += $this->mBatchSize - 1;
                        wfWaitForSlaves();
                }
                $this->output( "...removing dead rows from page_restrictions\n" );
                // Kill any broken rows from previous imports
                $db->delete( 'page_restrictions', array( 'pr_level' => '' ) );
                // Kill other invalid rows
                $db->deleteJoin( 'page_restrictions', 'page', 'pr_page', 'page_id', array( 'page_namespace' => NS_MEDIAWIKI ) );
                $this->output( "...Done!\n" );
        }
}

$maintClass = "UpdateRestrictions";
require_once( RUN_MAINTENANCE_IF_MAIN );