WebInstallerDBConnect.php

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<?php
class WebInstallerDBConnect extends WebInstallerPage {

    public function execute() {
        if ( $this->getVar( '_ExistingDBSettings' ) ) {
            return 'skip';
        }

        $r = $this->parent->request;
        if ( $r->wasPosted() ) {
            $status = $this->submit();

            if ( $status->isGood() ) {
                $this->setVar( '_UpgradeDone', false );

                return 'continue';
            } else {
                $this->parent->showStatusBox( $status );
            }
        }

        $this->startForm();

        $types = "<ul class=\"config-settings-block\">\n";
        $settings = '';
        $defaultType = $this->getVar( 'wgDBtype' );

        // Messages: config-dbsupport-mysql, config-dbsupport-postgres, config-dbsupport-sqlite
        $dbSupport = '';
        foreach ( Installer::getDBTypes() as $type ) {
            $dbSupport .= wfMessage( "config-dbsupport-$type" )->plain() . "\n";
        }
        $this->addHTML( $this->parent->getInfoBox(
            wfMessage( 'config-support-info', trim( $dbSupport ) )->plain() ) );

        // It's possible that the library for the default DB type is not compiled in.
        // In that case, instead select the first supported DB type in the list.
        $compiledDBs = $this->parent->getCompiledDBs();
        if ( !in_array( $defaultType, $compiledDBs ) ) {
            $defaultType = $compiledDBs[0];
        }

        foreach ( $compiledDBs as $type ) {
            $installer = $this->parent->getDBInstaller( $type );
            $types .=
                '<li>' .
                Xml::radioLabel(
                    $installer->getReadableName(),
                    'DBType',
                    $type,
                    "DBType_$type",
                    $type == $defaultType,
                    [ 'class' => 'dbRadio', 'rel' => "DB_wrapper_$type" ]
                ) .
                "</li>\n";

            // Messages: config-header-mysql, config-header-postgres, config-header-sqlite
            $settings .= Html::openElement(
                    'div',
                    [
                        'id' => 'DB_wrapper_' . $type,
                        'class' => 'dbWrapper'
                    ]
                ) .
                Html::element( 'h3', [], wfMessage( 'config-header-' . $type )->text() ) .
                $installer->getConnectForm() .
                "</div>\n";
        }

        $types .= "</ul><br style=\"clear: left\"/>\n";

        $this->addHTML( $this->parent->label( 'config-db-type', false, $types ) . $settings );
        $this->endForm();

        return null;
    }

    public function submit() {
        $r = $this->parent->request;
        $type = $r->getVal( 'DBType' );
        if ( !$type ) {
            return Status::newFatal( 'config-invalid-db-type' );
        }
        $this->setVar( 'wgDBtype', $type );
        $installer = $this->parent->getDBInstaller( $type );
        if ( !$installer ) {
            return Status::newFatal( 'config-invalid-db-type' );
        }

        return $installer->submitConnectForm();
    }

}