WebInstallerExistingWiki.php

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<?php
class WebInstallerExistingWiki extends WebInstallerPage {

    public function execute() {
        // If there is no LocalSettings.php, continue to the installer welcome page
        $vars = Installer::getExistingLocalSettings();
        if ( !$vars ) {
            return 'skip';
        }

        // Check if the upgrade key supplied to the user has appeared in LocalSettings.php
        if ( $vars['wgUpgradeKey'] !== false
            && $this->getVar( '_UpgradeKeySupplied' )
            && $this->getVar( 'wgUpgradeKey' ) === $vars['wgUpgradeKey']
        ) {
            // It's there, so the user is authorized
            $status = $this->handleExistingUpgrade( $vars );
            if ( $status->isOK() ) {
                return 'skip';
            } else {
                $this->startForm();
                $this->parent->showStatusBox( $status );
                $this->endForm( 'continue' );

                return 'output';
            }
        }

        // If there is no $wgUpgradeKey, tell the user to add one to LocalSettings.php
        if ( $vars['wgUpgradeKey'] === false ) {
            if ( $this->getVar( 'wgUpgradeKey', false ) === false ) {
                $secretKey = $this->getVar( 'wgSecretKey' ); // preserve $wgSecretKey
                $this->parent->generateKeys();
                $this->setVar( 'wgSecretKey', $secretKey );
                $this->setVar( '_UpgradeKeySupplied', true );
            }
            $this->startForm();
            $this->addHTML( $this->parent->getInfoBox(
                wfMessage( 'config-upgrade-key-missing', "<pre dir=\"ltr\">\$wgUpgradeKey = '" .
                    $this->getVar( 'wgUpgradeKey' ) . "';</pre>" )->plain()
            ) );
            $this->endForm( 'continue' );

            return 'output';
        }

        // If there is an upgrade key, but it wasn't supplied, prompt the user to enter it

        $r = $this->parent->request;
        if ( $r->wasPosted() ) {
            $key = $r->getText( 'config_wgUpgradeKey' );
            if ( !$key || $key !== $vars['wgUpgradeKey'] ) {
                $this->parent->showError( 'config-localsettings-badkey' );
                $this->showKeyForm();

                return 'output';
            }
            // Key was OK
            $status = $this->handleExistingUpgrade( $vars );
            if ( $status->isOK() ) {
                return 'continue';
            } else {
                $this->parent->showStatusBox( $status );
                $this->showKeyForm();

                return 'output';
            }
        } else {
            $this->showKeyForm();

            return 'output';
        }
    }

    protected function showKeyForm() {
        $this->startForm();
        $this->addHTML(
            $this->parent->getInfoBox( wfMessage( 'config-localsettings-upgrade' )->plain() ) .
            '<br />' .
            $this->parent->getTextBox( [
                'var' => 'wgUpgradeKey',
                'label' => 'config-localsettings-key',
                'attribs' => [ 'autocomplete' => 'off' ],
            ] )
        );
        $this->endForm( 'continue' );
    }

    protected function importVariables( $names, $vars ) {
        $status = Status::newGood();
        foreach ( $names as $name ) {
            if ( !isset( $vars[$name] ) ) {
                $status->fatal( 'config-localsettings-incomplete', $name );
            }
            $this->setVar( $name, $vars[$name] );
        }

        return $status;
    }

    protected function handleExistingUpgrade( $vars ) {
        // Check $wgDBtype
        if ( !isset( $vars['wgDBtype'] ) ||
            !in_array( $vars['wgDBtype'], Installer::getDBTypes() )
        ) {
            return Status::newFatal( 'config-localsettings-connection-error', '' );
        }

        // Set the relevant variables from LocalSettings.php
        $requiredVars = [ 'wgDBtype' ];
        $status = $this->importVariables( $requiredVars, $vars );
        $installer = $this->parent->getDBInstaller();
        $status->merge( $this->importVariables( $installer->getGlobalNames(), $vars ) );
        if ( !$status->isOK() ) {
            return $status;
        }

        if ( isset( $vars['wgDBadminuser'] ) ) {
            $this->setVar( '_InstallUser', $vars['wgDBadminuser'] );
        } else {
            $this->setVar( '_InstallUser', $vars['wgDBuser'] );
        }
        if ( isset( $vars['wgDBadminpassword'] ) ) {
            $this->setVar( '_InstallPassword', $vars['wgDBadminpassword'] );
        } else {
            $this->setVar( '_InstallPassword', $vars['wgDBpassword'] );
        }

        // Test the database connection
        $status = $installer->getConnection();
        if ( !$status->isOK() ) {
            // Adjust the error message to explain things correctly
            $status->replaceMessage( 'config-connection-error',
                'config-localsettings-connection-error' );

            return $status;
        }

        // All good
        $this->setVar( '_ExistingDBSettings', true );

        // Copy $wgAuthenticationTokenVersion too, if it exists
        $this->setVar( 'wgAuthenticationTokenVersion',
            isset( $vars['wgAuthenticationTokenVersion'] )
                ? $vars['wgAuthenticationTokenVersion']
                : null
        );

        return $status;
    }

}