WebInstallerPage.php

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<?php
abstract class WebInstallerPage {

    public $parent;

    abstract public function execute();

    public function __construct( WebInstaller $parent ) {
        $this->parent = $parent;
    }

    public function isSlow() {
        return false;
    }

    public function addHTML( $html ) {
        $this->parent->output->addHTML( $html );
    }

    public function startForm() {
        $this->addHTML(
            "<div class=\"config-section\">\n" .
            Html::openElement(
                'form',
                array(
                    'method' => 'post',
                    'action' => $this->parent->getUrl( array( 'page' => $this->getName() ) )
                )
            ) . "\n"
        );
    }

    public function endForm( $continue = 'continue', $back = 'back' ) {
        $s = "<div class=\"config-submit\">\n";
        $id = $this->getId();

        if ( $id === false ) {
            $s .= Html::hidden( 'lastPage', $this->parent->request->getVal( 'lastPage' ) );
        }

        if ( $continue ) {
            // Fake submit button for enter keypress (bug 26267)
            // Messages: config-continue, config-restart, config-regenerate
            $s .= Xml::submitButton(
                wfMessage( "config-$continue" )->text(),
                array(
                    'name' => "enter-$continue",
                    'style' => 'visibility:hidden;overflow:hidden;width:1px;margin:0'
                )
            ) . "\n";
        }

        if ( $back ) {
            // Message: config-back
            $s .= Xml::submitButton(
                wfMessage( "config-$back" )->text(),
                array(
                    'name' => "submit-$back",
                    'tabindex' => $this->parent->nextTabIndex()
                )
            ) . "\n";
        }

        if ( $continue ) {
            // Messages: config-continue, config-restart, config-regenerate
            $s .= Xml::submitButton(
                wfMessage( "config-$continue" )->text(),
                array(
                    'name' => "submit-$continue",
                    'tabindex' => $this->parent->nextTabIndex(),
                )
            ) . "\n";
        }

        $s .= "</div></form></div>\n";
        $this->addHTML( $s );
    }

    public function getName() {
        return str_replace( 'WebInstaller_', '', get_class( $this ) );
    }

    protected function getId() {
        return array_search( $this->getName(), $this->parent->pageSequence );
    }

    public function getVar( $var ) {
        return $this->parent->getVar( $var );
    }

    public function setVar( $name, $value ) {
        $this->parent->setVar( $name, $value );
    }

    protected function getFieldsetStart( $legend ) {
        return "\n<fieldset><legend>" . wfMessage( $legend )->escaped() . "</legend>\n";
    }

    protected function getFieldsetEnd() {
        return "</fieldset>\n";
    }

    protected function startLiveBox() {
        $this->addHTML(
            '<div id="config-spinner" style="display:none;">' .
            '<img src="../skins/common/images/ajax-loader.gif" /></div>' .
            '<script>jQuery( "#config-spinner" ).show();</script>' .
            '<div id="config-live-log">' .
            '<textarea name="LiveLog" rows="10" cols="30" readonly="readonly">'
        );
        $this->parent->output->flush();
    }

    protected function endLiveBox() {
        $this->addHTML( '</textarea></div>
<script>jQuery( "#config-spinner" ).hide()</script>' );
        $this->parent->output->flush();
    }

}

class WebInstaller_Language extends WebInstallerPage {

    public function execute() {
        global $wgLang;
        $r = $this->parent->request;
        $userLang = $r->getVal( 'uselang' );
        $contLang = $r->getVal( 'ContLang' );

        $languages = Language::fetchLanguageNames();
        $lifetime = intval( ini_get( 'session.gc_maxlifetime' ) );
        if ( !$lifetime ) {
            $lifetime = 1440; // PHP default
        }

        if ( $r->wasPosted() ) {
            # Do session test
            if ( $this->parent->getSession( 'test' ) === null ) {
                $requestTime = $r->getVal( 'LanguageRequestTime' );
                if ( !$requestTime ) {
                    // The most likely explanation is that the user was knocked back
                    // from another page on POST due to session expiry
                    $msg = 'config-session-expired';
                } elseif ( time() - $requestTime > $lifetime ) {
                    $msg = 'config-session-expired';
                } else {
                    $msg = 'config-no-session';
                }
                $this->parent->showError( $msg, $wgLang->formatTimePeriod( $lifetime ) );
            } else {
                if ( isset( $languages[$userLang] ) ) {
                    $this->setVar( '_UserLang', $userLang );
                }
                if ( isset( $languages[$contLang] ) ) {
                    $this->setVar( 'wgLanguageCode', $contLang );
                }

                return 'continue';
            }
        } elseif ( $this->parent->showSessionWarning ) {
            # The user was knocked back from another page to the start
            # This probably indicates a session expiry
            $this->parent->showError( 'config-session-expired',
                $wgLang->formatTimePeriod( $lifetime ) );
        }

        $this->parent->setSession( 'test', true );

        if ( !isset( $languages[$userLang] ) ) {
            $userLang = $this->getVar( '_UserLang', 'en' );
        }
        if ( !isset( $languages[$contLang] ) ) {
            $contLang = $this->getVar( 'wgLanguageCode', 'en' );
        }
        $this->startForm();
        $s = Html::hidden( 'LanguageRequestTime', time() ) .
            $this->getLanguageSelector( 'uselang', 'config-your-language', $userLang,
                $this->parent->getHelpBox( 'config-your-language-help' ) ) .
            $this->getLanguageSelector( 'ContLang', 'config-wiki-language', $contLang,
                $this->parent->getHelpBox( 'config-wiki-language-help' ) );
        $this->addHTML( $s );
        $this->endForm( 'continue', false );

        return null;
    }

    public function getLanguageSelector( $name, $label, $selectedCode, $helpHtml = '' ) {
        global $wgDummyLanguageCodes;

        $s = $helpHtml;

        $s .= Html::openElement( 'select', array( 'id' => $name, 'name' => $name,
                'tabindex' => $this->parent->nextTabIndex() ) ) . "\n";

        $languages = Language::fetchLanguageNames();
        ksort( $languages );
        foreach ( $languages as $code => $lang ) {
            if ( isset( $wgDummyLanguageCodes[$code] ) ) {
                continue;
            }
            $s .= "\n" . Xml::option( "$code - $lang", $code, $code == $selectedCode );
        }
        $s .= "\n</select>\n";

        return $this->parent->label( $label, $name, $s );
    }

}

class WebInstaller_ExistingWiki 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( array(
                'var' => 'wgUpgradeKey',
                'label' => 'config-localsettings-key',
                'attribs' => array( '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 = array( '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 );

        return $status;
    }

}

class WebInstaller_Welcome extends WebInstallerPage {

    public function execute() {
        if ( $this->parent->request->wasPosted() ) {
            if ( $this->getVar( '_Environment' ) ) {
                return 'continue';
            }
        }
        $this->parent->output->addWikiText( wfMessage( 'config-welcome' )->plain() );
        $status = $this->parent->doEnvironmentChecks();
        if ( $status->isGood() ) {
            $this->parent->output->addHTML( '<span class="success-message">' .
                wfMessage( 'config-env-good' )->escaped() . '</span>' );
            $this->parent->output->addWikiText( wfMessage( 'config-copyright',
                SpecialVersion::getCopyrightAndAuthorList() )->plain() );
            $this->startForm();
            $this->endForm();
        } else {
            $this->parent->showStatusMessage( $status );
        }

        return '';
    }

}

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

        // 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 == $defaultType,
                    array( 'class' => 'dbRadio', 'rel' => "DB_wrapper_$type" )
                ) .
                "</li>\n";

            // Messages: config-header-mysql, config-header-postgres, config-header-oracle,
            // config-header-sqlite
            $settings .= Html::openElement(
                    'div',
                    array(
                        'id' => 'DB_wrapper_' . $type,
                        'class' => 'dbWrapper'
                    )
                ) .
                Html::element( 'h3', array(), 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();
    }

}

class WebInstaller_Upgrade extends WebInstallerPage {

    public function isSlow() {
        return true;
    }

    public function execute() {
        if ( $this->getVar( '_UpgradeDone' ) ) {
            // Allow regeneration of LocalSettings.php, unless we are working
            // from a pre-existing LocalSettings.php file and we want to avoid
            // leaking its contents
            if ( $this->parent->request->wasPosted() && !$this->getVar( '_ExistingDBSettings' ) ) {
                // Done message acknowledged
                return 'continue';
            } else {
                // Back button click
                // Show the done message again
                // Make them click back again if they want to do the upgrade again
                $this->showDoneMessage();

                return 'output';
            }
        }

        // wgDBtype is generally valid here because otherwise the previous page
        // (connect) wouldn't have declared its happiness
        $type = $this->getVar( 'wgDBtype' );
        $installer = $this->parent->getDBInstaller( $type );

        if ( !$installer->needsUpgrade() ) {
            return 'skip';
        }

        if ( $this->parent->request->wasPosted() ) {
            $installer->preUpgrade();

            $this->startLiveBox();
            $result = $installer->doUpgrade();
            $this->endLiveBox();

            if ( $result ) {
                // If they're going to possibly regenerate LocalSettings, we
                // need to create the upgrade/secret keys. Bug 26481
                if ( !$this->getVar( '_ExistingDBSettings' ) ) {
                    $this->parent->generateKeys();
                }
                $this->setVar( '_UpgradeDone', true );
                $this->showDoneMessage();

                return 'output';
            }
        }

        $this->startForm();
        $this->addHTML( $this->parent->getInfoBox(
            wfMessage( 'config-can-upgrade', $GLOBALS['wgVersion'] )->plain() ) );
        $this->endForm();

        return null;
    }

    public function showDoneMessage() {
        $this->startForm();
        $regenerate = !$this->getVar( '_ExistingDBSettings' );
        if ( $regenerate ) {
            $msg = 'config-upgrade-done';
        } else {
            $msg = 'config-upgrade-done-no-regenerate';
        }
        $this->parent->disableLinkPopups();
        $this->addHTML(
            $this->parent->getInfoBox(
                wfMessage( $msg,
                    $this->getVar( 'wgServer' ) .
                    $this->getVar( 'wgScriptPath' ) . '/index' .
                    $this->getVar( 'wgScriptExtension' )
                )->plain(), 'tick-32.png'
            )
        );
        $this->parent->restoreLinkPopups();
        $this->endForm( $regenerate ? 'regenerate' : false, false );
    }

}

class WebInstaller_DBSettings extends WebInstallerPage {

    public function execute() {
        $installer = $this->parent->getDBInstaller( $this->getVar( 'wgDBtype' ) );

        $r = $this->parent->request;
        if ( $r->wasPosted() ) {
            $status = $installer->submitSettingsForm();
            if ( $status === false ) {
                return 'skip';
            } elseif ( $status->isGood() ) {
                return 'continue';
            } else {
                $this->parent->showStatusBox( $status );
            }
        }

        $form = $installer->getSettingsForm();
        if ( $form === false ) {
            return 'skip';
        }

        $this->startForm();
        $this->addHTML( $form );
        $this->endForm();

        return null;
    }

}

class WebInstaller_Name extends WebInstallerPage {

    public function execute() {
        $r = $this->parent->request;
        if ( $r->wasPosted() ) {
            if ( $this->submit() ) {
                return 'continue';
            }
        }

        $this->startForm();

        // Encourage people to not name their site 'MediaWiki' by blanking the
        // field. I think that was the intent with the original $GLOBALS['wgSitename']
        // but these two always were the same so had the effect of making the
        // installer forget $wgSitename when navigating back to this page.
        if ( $this->getVar( 'wgSitename' ) == 'MediaWiki' ) {
            $this->setVar( 'wgSitename', '' );
        }

        // Set wgMetaNamespace to something valid before we show the form.
        // $wgMetaNamespace defaults to $wgSiteName which is 'MediaWiki'
        $metaNS = $this->getVar( 'wgMetaNamespace' );
        $this->setVar(
            'wgMetaNamespace',
            wfMessage( 'config-ns-other-default' )->inContentLanguage()->text()
        );

        $this->addHTML(
            $this->parent->getTextBox( array(
                'var' => 'wgSitename',
                'label' => 'config-site-name',
                'help' => $this->parent->getHelpBox( 'config-site-name-help' )
            ) ) .
            // getRadioSet() builds a set of labeled radio buttons.
            // For grep: The following messages are used as the item labels:
            // config-ns-site-name, config-ns-generic, config-ns-other
            $this->parent->getRadioSet( array(
                'var' => '_NamespaceType',
                'label' => 'config-project-namespace',
                'itemLabelPrefix' => 'config-ns-',
                'values' => array( 'site-name', 'generic', 'other' ),
                'commonAttribs' => array( 'class' => 'enableForOther',
                    'rel' => 'config_wgMetaNamespace' ),
                'help' => $this->parent->getHelpBox( 'config-project-namespace-help' )
            ) ) .
            $this->parent->getTextBox( array(
                'var' => 'wgMetaNamespace',
                'label' => '', // @todo Needs a label?
                'attribs' => array( 'readonly' => 'readonly', 'class' => 'enabledByOther' )
            ) ) .
            $this->getFieldSetStart( 'config-admin-box' ) .
            $this->parent->getTextBox( array(
                'var' => '_AdminName',
                'label' => 'config-admin-name',
                'help' => $this->parent->getHelpBox( 'config-admin-help' )
            ) ) .
            $this->parent->getPasswordBox( array(
                'var' => '_AdminPassword',
                'label' => 'config-admin-password',
            ) ) .
            $this->parent->getPasswordBox( array(
                'var' => '_AdminPassword2',
                'label' => 'config-admin-password-confirm'
            ) ) .
            $this->parent->getTextBox( array(
                'var' => '_AdminEmail',
                'label' => 'config-admin-email',
                'help' => $this->parent->getHelpBox( 'config-admin-email-help' )
            ) ) .
            $this->parent->getCheckBox( array(
                'var' => '_Subscribe',
                'label' => 'config-subscribe',
                'help' => $this->parent->getHelpBox( 'config-subscribe-help' )
            ) ) .
            $this->getFieldSetEnd() .
            $this->parent->getInfoBox( wfMessage( 'config-almost-done' )->text() ) .
            // getRadioSet() builds a set of labeled radio buttons.
            // For grep: The following messages are used as the item labels:
            // config-optional-continue, config-optional-skip
            $this->parent->getRadioSet( array(
                'var' => '_SkipOptional',
                'itemLabelPrefix' => 'config-optional-',
                'values' => array( 'continue', 'skip' )
            ) )
        );

        // Restore the default value
        $this->setVar( 'wgMetaNamespace', $metaNS );

        $this->endForm();

        return 'output';
    }

    public function submit() {
        $retVal = true;
        $this->parent->setVarsFromRequest( array( 'wgSitename', '_NamespaceType',
            '_AdminName', '_AdminPassword', '_AdminPassword2', '_AdminEmail',
            '_Subscribe', '_SkipOptional', 'wgMetaNamespace' ) );

        // Validate site name
        if ( strval( $this->getVar( 'wgSitename' ) ) === '' ) {
            $this->parent->showError( 'config-site-name-blank' );
            $retVal = false;
        }

        // Fetch namespace
        $nsType = $this->getVar( '_NamespaceType' );
        if ( $nsType == 'site-name' ) {
            $name = $this->getVar( 'wgSitename' );
            // Sanitize for namespace
            // This algorithm should match the JS one in WebInstallerOutput.php
            $name = preg_replace( '/[\[\]\{\}|#<>%+? ]/', '_', $name );
            $name = str_replace( '&', '&amp;', $name );
            $name = preg_replace( '/__+/', '_', $name );
            $name = ucfirst( trim( $name, '_' ) );
        } elseif ( $nsType == 'generic' ) {
            $name = wfMessage( 'config-ns-generic' )->text();
        } else { // other
            $name = $this->getVar( 'wgMetaNamespace' );
        }

        // Validate namespace
        if ( strpos( $name, ':' ) !== false ) {
            $good = false;
        } else {
            // Title-style validation
            $title = Title::newFromText( $name );
            if ( !$title ) {
                $good = $nsType == 'site-name';
            } else {
                $name = $title->getDBkey();
                $good = true;
            }
        }
        if ( !$good ) {
            $this->parent->showError( 'config-ns-invalid', $name );
            $retVal = false;
        }

        // Make sure it won't conflict with any existing namespaces
        global $wgContLang;
        $nsIndex = $wgContLang->getNsIndex( $name );
        if ( $nsIndex !== false && $nsIndex !== NS_PROJECT ) {
            $this->parent->showError( 'config-ns-conflict', $name );
            $retVal = false;
        }

        $this->setVar( 'wgMetaNamespace', $name );

        // Validate username for creation
        $name = $this->getVar( '_AdminName' );
        if ( strval( $name ) === '' ) {
            $this->parent->showError( 'config-admin-name-blank' );
            $cname = $name;
            $retVal = false;
        } else {
            $cname = User::getCanonicalName( $name, 'creatable' );
            if ( $cname === false ) {
                $this->parent->showError( 'config-admin-name-invalid', $name );
                $retVal = false;
            } else {
                $this->setVar( '_AdminName', $cname );
            }
        }

        // Validate password
        $msg = false;
        $pwd = $this->getVar( '_AdminPassword' );
        $user = User::newFromName( $cname );
        if ( $user ) {
            $valid = $user->getPasswordValidity( $pwd );
        } else {
            $valid = 'config-admin-name-invalid';
        }
        if ( strval( $pwd ) === '' ) {
            # $user->getPasswordValidity just checks for $wgMinimalPasswordLength.
            # This message is more specific and helpful.
            $msg = 'config-admin-password-blank';
        } elseif ( $pwd !== $this->getVar( '_AdminPassword2' ) ) {
            $msg = 'config-admin-password-mismatch';
        } elseif ( $valid !== true ) {
            $msg = $valid;
        }
        if ( $msg !== false ) {
            call_user_func_array( array( $this->parent, 'showError' ), (array)$msg );
            $this->setVar( '_AdminPassword', '' );
            $this->setVar( '_AdminPassword2', '' );
            $retVal = false;
        }

        // Validate e-mail if provided
        $email = $this->getVar( '_AdminEmail' );
        if ( $email && !Sanitizer::validateEmail( $email ) ) {
            $this->parent->showError( 'config-admin-error-bademail' );
            $retVal = false;
        }
        // If they asked to subscribe to mediawiki-announce but didn't give
        // an e-mail, show an error. Bug 29332
        if ( !$email && $this->getVar( '_Subscribe' ) ) {
            $this->parent->showError( 'config-subscribe-noemail' );
            $retVal = false;
        }

        return $retVal;
    }

}

class WebInstaller_Options extends WebInstallerPage {

    public function execute() {
        if ( $this->getVar( '_SkipOptional' ) == 'skip' ) {
            return 'skip';
        }
        if ( $this->parent->request->wasPosted() ) {
            if ( $this->submit() ) {
                return 'continue';
            }
        }

        $emailwrapperStyle = $this->getVar( 'wgEnableEmail' ) ? '' : 'display: none';
        $this->startForm();
        $this->addHTML(
            # User Rights
            // getRadioSet() builds a set of labeled radio buttons.
            // For grep: The following messages are used as the item labels:
            // config-profile-wiki, config-profile-no-anon, config-profile-fishbowl, config-profile-private
            $this->parent->getRadioSet( array(
                'var' => '_RightsProfile',
                'label' => 'config-profile',
                'itemLabelPrefix' => 'config-profile-',
                'values' => array_keys( $this->parent->rightsProfiles ),
            ) ) .
            $this->parent->getInfoBox( wfMessage( 'config-profile-help' )->plain() ) .

            # Licensing
            // getRadioSet() builds a set of labeled radio buttons.
            // For grep: The following messages are used as the item labels:
            // config-license-cc-by, config-license-cc-by-sa, config-license-cc-by-nc-sa,
            // config-license-cc-0, config-license-pd, config-license-gfdl,
            // config-license-none, config-license-cc-choose
            $this->parent->getRadioSet( array(
                'var' => '_LicenseCode',
                'label' => 'config-license',
                'itemLabelPrefix' => 'config-license-',
                'values' => array_keys( $this->parent->licenses ),
                'commonAttribs' => array( 'class' => 'licenseRadio' ),
            ) ) .
            $this->getCCChooser() .
            $this->parent->getHelpBox( 'config-license-help' ) .

            # E-mail
            $this->getFieldSetStart( 'config-email-settings' ) .
            $this->parent->getCheckBox( array(
                'var' => 'wgEnableEmail',
                'label' => 'config-enable-email',
                'attribs' => array( 'class' => 'showHideRadio', 'rel' => 'emailwrapper' ),
            ) ) .
            $this->parent->getHelpBox( 'config-enable-email-help' ) .
            "<div id=\"emailwrapper\" style=\"$emailwrapperStyle\">" .
            $this->parent->getTextBox( array(
                'var' => 'wgPasswordSender',
                'label' => 'config-email-sender'
            ) ) .
            $this->parent->getHelpBox( 'config-email-sender-help' ) .
            $this->parent->getCheckBox( array(
                'var' => 'wgEnableUserEmail',
                'label' => 'config-email-user',
            ) ) .
            $this->parent->getHelpBox( 'config-email-user-help' ) .
            $this->parent->getCheckBox( array(
                'var' => 'wgEnotifUserTalk',
                'label' => 'config-email-usertalk',
            ) ) .
            $this->parent->getHelpBox( 'config-email-usertalk-help' ) .
            $this->parent->getCheckBox( array(
                'var' => 'wgEnotifWatchlist',
                'label' => 'config-email-watchlist',
            ) ) .
            $this->parent->getHelpBox( 'config-email-watchlist-help' ) .
            $this->parent->getCheckBox( array(
                'var' => 'wgEmailAuthentication',
                'label' => 'config-email-auth',
            ) ) .
            $this->parent->getHelpBox( 'config-email-auth-help' ) .
            "</div>" .
            $this->getFieldSetEnd()
        );

        $extensions = $this->parent->findExtensions();

        if ( $extensions ) {
            $extHtml = $this->getFieldSetStart( 'config-extensions' );

            foreach ( $extensions as $ext ) {
                $extHtml .= $this->parent->getCheckBox( array(
                    'var' => "ext-$ext",
                    'rawtext' => $ext,
                ) );
            }

            $extHtml .= $this->parent->getHelpBox( 'config-extensions-help' ) .
                $this->getFieldSetEnd();
            $this->addHTML( $extHtml );
        }

        // Having / in paths in Windows looks funny :)
        $this->setVar( 'wgDeletedDirectory',
            str_replace(
                '/', DIRECTORY_SEPARATOR,
                $this->getVar( 'wgDeletedDirectory' )
            )
        );

        $uploadwrapperStyle = $this->getVar( 'wgEnableUploads' ) ? '' : 'display: none';
        $this->addHTML(
            # Uploading
            $this->getFieldSetStart( 'config-upload-settings' ) .
            $this->parent->getCheckBox( array(
                'var' => 'wgEnableUploads',
                'label' => 'config-upload-enable',
                'attribs' => array( 'class' => 'showHideRadio', 'rel' => 'uploadwrapper' ),
                'help' => $this->parent->getHelpBox( 'config-upload-help' )
            ) ) .
            '<div id="uploadwrapper" style="' . $uploadwrapperStyle . '">' .
            $this->parent->getTextBox( array(
                'var' => 'wgDeletedDirectory',
                'label' => 'config-upload-deleted',
                'attribs' => array( 'dir' => 'ltr' ),
                'help' => $this->parent->getHelpBox( 'config-upload-deleted-help' )
            ) ) .
            '</div>' .
            $this->parent->getTextBox( array(
                'var' => 'wgLogo',
                'label' => 'config-logo',
                'attribs' => array( 'dir' => 'ltr' ),
                'help' => $this->parent->getHelpBox( 'config-logo-help' )
            ) )
        );
        $this->addHTML(
            $this->parent->getCheckBox( array(
                'var' => 'wgUseInstantCommons',
                'label' => 'config-instantcommons',
                'help' => $this->parent->getHelpBox( 'config-instantcommons-help' )
            ) ) .
            $this->getFieldSetEnd()
        );

        $caches = array( 'none' );
        if ( count( $this->getVar( '_Caches' ) ) ) {
            $caches[] = 'accel';
        }
        $caches[] = 'memcached';

        // We'll hide/show this on demand when the value changes, see config.js.
        $cacheval = $this->getVar( 'wgMainCacheType' );
        if ( !$cacheval ) {
            // We need to set a default here; but don't hardcode it
            // or we lose it every time we reload the page for validation
            // or going back!
            $cacheval = 'none';
        }
        $hidden = ( $cacheval == 'memcached' ) ? '' : 'display: none';
        $this->addHTML(
            # Advanced settings
            $this->getFieldSetStart( 'config-advanced-settings' ) .
            # Object cache settings
            // getRadioSet() builds a set of labeled radio buttons.
            // For grep: The following messages are used as the item labels:
            // config-cache-none, config-cache-accel, config-cache-memcached
            $this->parent->getRadioSet( array(
                'var' => 'wgMainCacheType',
                'label' => 'config-cache-options',
                'itemLabelPrefix' => 'config-cache-',
                'values' => $caches,
                'value' => $cacheval,
            ) ) .
            $this->parent->getHelpBox( 'config-cache-help' ) .
            "<div id=\"config-memcachewrapper\" style=\"$hidden\">" .
            $this->parent->getTextArea( array(
                'var' => '_MemCachedServers',
                'label' => 'config-memcached-servers',
                'help' => $this->parent->getHelpBox( 'config-memcached-help' )
            ) ) .
            '</div>' .
            $this->getFieldSetEnd()
        );
        $this->endForm();

        return null;
    }

    public function getCCPartnerUrl() {
        $server = $this->getVar( 'wgServer' );
        $exitUrl = $server . $this->parent->getUrl( array(
            'page' => 'Options',
            'SubmitCC' => 'indeed',
            'config__LicenseCode' => 'cc',
            'config_wgRightsUrl' => '[license_url]',
            'config_wgRightsText' => '[license_name]',
            'config_wgRightsIcon' => '[license_button]',
        ) );
        $styleUrl = $server . dirname( dirname( $this->parent->getUrl() ) ) .
            '/skins/common/config-cc.css';
        $iframeUrl = 'http://creativecommons.org/license/?' .
            wfArrayToCgi( array(
                'partner' => 'MediaWiki',
                'exit_url' => $exitUrl,
                'lang' => $this->getVar( '_UserLang' ),
                'stylesheet' => $styleUrl,
            ) );

        return $iframeUrl;
    }

    public function getCCChooser() {
        $iframeAttribs = array(
            'class' => 'config-cc-iframe',
            'name' => 'config-cc-iframe',
            'id' => 'config-cc-iframe',
            'frameborder' => 0,
            'width' => '100%',
            'height' => '100%',
        );
        if ( $this->getVar( '_CCDone' ) ) {
            $iframeAttribs['src'] = $this->parent->getUrl( array( 'ShowCC' => 'yes' ) );
        } else {
            $iframeAttribs['src'] = $this->getCCPartnerUrl();
        }
        $wrapperStyle = ( $this->getVar( '_LicenseCode' ) == 'cc-choose' ) ? '' : 'display: none';

        return "<div class=\"config-cc-wrapper\" id=\"config-cc-wrapper\" style=\"$wrapperStyle\">\n" .
            Html::element( 'iframe', $iframeAttribs, '', false /* not short */ ) .
            "</div>\n";
    }

    public function getCCDoneBox() {
        $js = "parent.document.getElementById('config-cc-wrapper').style.height = '$1';";
        // If you change this height, also change it in config.css
        $expandJs = str_replace( '$1', '54em', $js );
        $reduceJs = str_replace( '$1', '70px', $js );

        return '<p>' .
            Html::element( 'img', array( 'src' => $this->getVar( 'wgRightsIcon' ) ) ) .
            '&#160;&#160;' .
            htmlspecialchars( $this->getVar( 'wgRightsText' ) ) .
            "</p>\n" .
            "<p style=\"text-align: center;\">" .
            Html::element( 'a',
                array(
                    'href' => $this->getCCPartnerUrl(),
                    'onclick' => $expandJs,
                ),
                wfMessage( 'config-cc-again' )->text()
            ) .
            "</p>\n" .
            "<script>\n" .
            # Reduce the wrapper div height
            htmlspecialchars( $reduceJs ) .
            "\n" .
            "</script>\n";
    }

    public function submitCC() {
        $newValues = $this->parent->setVarsFromRequest(
            array( 'wgRightsUrl', 'wgRightsText', 'wgRightsIcon' ) );
        if ( count( $newValues ) != 3 ) {
            $this->parent->showError( 'config-cc-error' );

            return;
        }
        $this->setVar( '_CCDone', true );
        $this->addHTML( $this->getCCDoneBox() );
    }

    public function submit() {
        $this->parent->setVarsFromRequest( array( '_RightsProfile', '_LicenseCode',
            'wgEnableEmail', 'wgPasswordSender', 'wgEnableUploads', 'wgLogo',
            'wgEnableUserEmail', 'wgEnotifUserTalk', 'wgEnotifWatchlist',
            'wgEmailAuthentication', 'wgMainCacheType', '_MemCachedServers',
            'wgUseInstantCommons' ) );

        if ( !array_key_exists( $this->getVar( '_RightsProfile' ), $this->parent->rightsProfiles )
        ) {
            reset( $this->parent->rightsProfiles );
            $this->setVar( '_RightsProfile', key( $this->parent->rightsProfiles ) );
        }

        $code = $this->getVar( '_LicenseCode' );
        if ( $code == 'cc-choose' ) {
            if ( !$this->getVar( '_CCDone' ) ) {
                $this->parent->showError( 'config-cc-not-chosen' );

                return false;
            }
        } elseif ( array_key_exists( $code, $this->parent->licenses ) ) {
            // Messages:
            // config-license-cc-by, config-license-cc-by-sa, config-license-cc-by-nc-sa,
            // config-license-cc-0, config-license-pd, config-license-gfdl, config-license-none,
            // config-license-cc-choose
            $entry = $this->parent->licenses[$code];
            if ( isset( $entry['text'] ) ) {
                $this->setVar( 'wgRightsText', $entry['text'] );
            } else {
                $this->setVar( 'wgRightsText', wfMessage( 'config-license-' . $code )->text() );
            }
            $this->setVar( 'wgRightsUrl', $entry['url'] );
            $this->setVar( 'wgRightsIcon', $entry['icon'] );
        } else {
            $this->setVar( 'wgRightsText', '' );
            $this->setVar( 'wgRightsUrl', '' );
            $this->setVar( 'wgRightsIcon', '' );
        }

        $extsAvailable = $this->parent->findExtensions();
        $extsToInstall = array();
        foreach ( $extsAvailable as $ext ) {
            if ( $this->parent->request->getCheck( 'config_ext-' . $ext ) ) {
                $extsToInstall[] = $ext;
            }
        }
        $this->parent->setVar( '_Extensions', $extsToInstall );

        if ( $this->getVar( 'wgMainCacheType' ) == 'memcached' ) {
            $memcServers = explode( "\n", $this->getVar( '_MemCachedServers' ) );
            if ( !$memcServers ) {
                $this->parent->showError( 'config-memcache-needservers' );

                return false;
            }

            foreach ( $memcServers as $server ) {
                $memcParts = explode( ":", $server, 2 );
                if ( !isset( $memcParts[0] )
                    || ( !IP::isValid( $memcParts[0] )
                        && ( gethostbyname( $memcParts[0] ) == $memcParts[0] ) )
                ) {
                    $this->parent->showError( 'config-memcache-badip', $memcParts[0] );

                    return false;
                } elseif ( !isset( $memcParts[1] ) ) {
                    $this->parent->showError( 'config-memcache-noport', $memcParts[0] );

                    return false;
                } elseif ( $memcParts[1] < 1 || $memcParts[1] > 65535 ) {
                    $this->parent->showError( 'config-memcache-badport', 1, 65535 );

                    return false;
                }
            }
        }

        return true;
    }

}

class WebInstaller_Install extends WebInstallerPage {

    public function isSlow() {
        return true;
    }

    public function execute() {
        if ( $this->getVar( '_UpgradeDone' ) ) {
            return 'skip';
        } elseif ( $this->getVar( '_InstallDone' ) ) {
            return 'continue';
        } elseif ( $this->parent->request->wasPosted() ) {
            $this->startForm();
            $this->addHTML( "<ul>" );
            $results = $this->parent->performInstallation(
                array( $this, 'startStage' ),
                array( $this, 'endStage' )
            );
            $this->addHTML( "</ul>" );
            // PerformInstallation bails on a fatal, so make sure the last item
            // completed before giving 'next.' Likewise, only provide back on failure
            $lastStep = end( $results );
            $continue = $lastStep->isOK() ? 'continue' : false;
            $back = $lastStep->isOK() ? false : 'back';
            $this->endForm( $continue, $back );
        } else {
            $this->startForm();
            $this->addHTML( $this->parent->getInfoBox( wfMessage( 'config-install-begin' )->plain() ) );
            $this->endForm();
        }

        return true;
    }

    public function startStage( $step ) {
        // Messages: config-install-database, config-install-tables, config-install-interwiki,
        // config-install-stats, config-install-keys, config-install-sysop, config-install-mainpage
        $this->addHTML( "<li>" . wfMessage( "config-install-$step" )->escaped() .
            wfMessage( 'ellipsis' )->escaped() );

        if ( $step == 'extension-tables' ) {
            $this->startLiveBox();
        }
    }

    public function endStage( $step, $status ) {
        if ( $step == 'extension-tables' ) {
            $this->endLiveBox();
        }
        $msg = $status->isOk() ? 'config-install-step-done' : 'config-install-step-failed';
        $html = wfMessage( 'word-separator' )->escaped() . wfMessage( $msg )->escaped();
        if ( !$status->isOk() ) {
            $html = "<span class=\"error\">$html</span>";
        }
        $this->addHTML( $html . "</li>\n" );
        if ( !$status->isGood() ) {
            $this->parent->showStatusBox( $status );
        }
    }

}

class WebInstaller_Complete extends WebInstallerPage {

    public function execute() {
        // Pop up a dialog box, to make it difficult for the user to forget
        // to download the file
        $lsUrl = $this->getVar( 'wgServer' ) . $this->parent->getURL( array( 'localsettings' => 1 ) );
        if ( isset( $_SERVER['HTTP_USER_AGENT'] ) &&
            strpos( $_SERVER['HTTP_USER_AGENT'], 'MSIE' ) !== false
        ) {
            // JS appears to be the only method that works consistently with IE7+
            $this->addHtml( "\n<script>jQuery( function () { document.location = " .
                Xml::encodeJsVar( $lsUrl ) . "; } );</script>\n" );
        } else {
            $this->parent->request->response()->header( "Refresh: 0;url=$lsUrl" );
        }

        $this->startForm();
        $this->parent->disableLinkPopups();
        $this->addHTML(
            $this->parent->getInfoBox(
                wfMessage( 'config-install-done',
                    $lsUrl,
                    $this->getVar( 'wgServer' ) .
                    $this->getVar( 'wgScriptPath' ) . '/index' .
                    $this->getVar( 'wgScriptExtension' ),
                    '<downloadlink/>'
                )->plain(), 'tick-32.png'
            )
        );
        $this->addHTML( $this->parent->getInfoBox(
            wfMessage( 'config-extension-link' )->text() ) );

        $this->parent->restoreLinkPopups();
        $this->endForm( false, false );
    }

}

class WebInstaller_Restart extends WebInstallerPage {

    public function execute() {
        $r = $this->parent->request;
        if ( $r->wasPosted() ) {
            $really = $r->getVal( 'submit-restart' );
            if ( $really ) {
                $this->parent->reset();
            }

            return 'continue';
        }

        $this->startForm();
        $s = $this->parent->getWarningBox( wfMessage( 'config-help-restart' )->plain() );
        $this->addHTML( $s );
        $this->endForm( 'restart' );

        return null;
    }

}

abstract class WebInstaller_Document extends WebInstallerPage {

    abstract protected function getFileName();

    public function execute() {
        $text = $this->getFileContents();
        $text = InstallDocFormatter::format( $text );
        $this->parent->output->addWikiText( $text );
        $this->startForm();
        $this->endForm( false );
    }

    public function getFileContents() {
        $file = __DIR__ . '/../../' . $this->getFileName();
        if ( !file_exists( $file ) ) {
            return wfMessage( 'config-nofile', $file )->plain();
        }

        return file_get_contents( $file );
    }

}

class WebInstaller_Readme extends WebInstaller_Document {

    protected function getFileName() {
        return 'README';
    }

}

class WebInstaller_ReleaseNotes extends WebInstaller_Document {

    protected function getFileName() {
        global $wgVersion;

        if ( !preg_match( '/^(\d+)\.(\d+).*/i', $wgVersion, $result ) ) {
            throw new MWException( 'Variable $wgVersion has an invalid value.' );
        }

        return 'RELEASE-NOTES-' . $result[1] . '.' . $result[2];
    }

}

class WebInstaller_UpgradeDoc extends WebInstaller_Document {

    protected function getFileName() {
        return 'UPGRADE';
    }

}

class WebInstaller_Copying extends WebInstaller_Document {

    protected function getFileName() {
        return 'COPYING';
    }

}