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)
                        $s .= Xml::submitButton( wfMessage( "config-$continue" )->text(),
                                array( 'name' => "enter-$continue", 'style' =>
                                        'visibility:hidden;overflow:hidden;width:1px;margin:0' ) ) . "\n";
                }

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

                if ( $continue ) {
                        $s .= Xml::submitButton( wfMessage( "config-$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 );
        }

        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' );

                $dbSupport = '';
                foreach( $this->parent->getDBTypes() as $type ) {
                        $link = DatabaseBase::factory( $type )->getSoftwareLink();
                        $dbSupport .= wfMessage( "config-support-$type", $link )->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";

                        $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();
        }

        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();
        }

        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();
        }

}

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' )
                        ) ) .
                        $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() ) .
                        $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 );
                $valid = $user && $user->getPasswordValidity( $pwd );
                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 ) {
                        # As of writing this will only catch the username being e.g. 'FOO' and
                        # the password 'foo'
                        $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
                        $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
                        $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' )
                        )
                );
                // If we're using the default, let the user set it relative to $wgScriptPath
                $curLogo = $this->getVar( 'wgLogo' );
                $logoString = ( $curLogo == "/wiki/skins/common/images/wiki.png" ) ?
                        '$wgStylePath/common/images/wiki.png' : $curLogo;

                $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',
                                'value' => $logoString,
                                '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
                        $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();
        }

        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 type=\"text/javascript\">\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 ( !in_array( $this->getVar( '_RightsProfile' ),
                        array_keys( $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 ( in_array( $code, array_keys( $this->parent->licenses ) ) ) {
                        $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 ) {
                $this->addHTML( "<li>" . wfMessage( "config-install-$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 the only method that works consistently with IE7+
                        $this->addHtml( "\n<script type=\"" . $GLOBALS['wgJsMimeType'] .
                                '">jQuery( document ).ready( 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->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' );
        }

}

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'; }
}