updateRestrictions.php

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

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

    public function execute() {
        $db = $this->getDB( DB_MASTER );
        if ( !$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',
                [ 'page_id', 'page_namespace', 'page_restrictions' ],
                $cond,
                __METHOD__
            );
            $batch = [];
            foreach ( $res as $row ) {
                $oldRestrictions = [];
                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', [ 'page_restrictions' => '' ],
                        [ '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[] = [
                        '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( [ $db, 'insert' ], 'page_restrictions',
                    $batch, __FUNCTION__, [ 'IGNORE' ] );
                if ( !$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', [ 'pr_level' => '' ] );
        // Kill other invalid rows
        $db->deleteJoin(
            'page_restrictions',
            'page',
            'pr_page',
            'page_id',
            [ 'page_namespace' => NS_MEDIAWIKI ]
        );
        $this->output( "...Done!\n" );
    }
}

$maintClass = "UpdateRestrictions";
require_once RUN_MAINTENANCE_IF_MAIN;