A code snippet showing the Registration and Edit forms implementation in the Contributor Maps module

controller.php

        public function RegistrationForm() {
            if($this->request->getVar('key') && $this->request->getVar('token')) {
                $key = $this->request->getVar('key');
                $token = $this->request->getVar('token');
            }else if($this->request->isPOST()) {
                $key = $this->request->requestVar('key');
                $token = $this->request->requestVar('token');
            }
            if($key && $token) {
                $memory = ContributorMaps_Data::get()->filter(array(
                    'Unique_Key' => $key,
                    'EditToken' => $token,
                    'EditTokenExpires:GreaterThan' => date('Y-m-d')
                ))->First();
                if(!$memory) {
                    return $this->redirect($this->Link("?action=edit&status=2"));
                }
            }
            $fields = new FieldList(
                new TextField('Name', 'Name*'),
                new TextField('Surname', 'Surname*'),
                new EmailField('Email', 'Email*'),
                new TextField('Location', 'Location* (e.g. Berlin, Deutschland)'),
                new HeaderField('Skills'),
                new CheckboxField('Skills_Design', 'Design'),
                new CheckboxField('Skills_Dev', 'Development'),
                new CheckboxField('Skills_Doc', 'Documentation'),
                new CheckboxField('Skills_Infra', 'Infrastructure'),
                new CheckboxField('Skills_l10n', 'Localisation'),
                new CheckboxField('Skills_Marketing', 'Marketing'),
                new CheckboxField('Skills_QA', 'Quality Assurance'),
                new CheckboxField('Skills_Base', 'Support - Base'),
                new CheckboxField('Skills_Calc', 'Support - Calc'),
                new CheckboxField('Skills_Draw', 'Support - Draw'),
                new CheckboxField('Skills_Impress', 'Support - Impress'),
                new CheckboxField('Skills_Math', 'Support - Math'),
                new CheckboxField('Skills_Writer', 'Support - Writer')
            );
            if($memory) {
                $fields->push(new HiddenField('Key','',$key));
                $fields->push(new HiddenField('Token','',$token));
                $actions = new FieldList(
                    new FormAction('processEditForm', 'Update')
                );
            }else{
                die("test");
                RecaptchaField::$js_options = array(
                    'theme' => 'white'
                );
                $fields->push(new RecaptchaField('Captcha'));
                $actions = new FieldList(
                    new FormAction('processForm', 'Register')
                );
            }
            $validator = new RequiredFields('Name', 'Surname', 'Email', 'Location');
            $form = new Form($this, 'RegistrationForm', $fields, $actions, $validator);
            //Load previously submitted data
            if($memory) {
                $form->loadDataFrom($memory);
            }else{
                $form->loadDataFrom(Session::get("FormInfo.{$form->FormName()}.data"));
            }
            return $form;
        }
        public function processForm($data, $form) {
            $errors = 0;
            //Check if Email is used
            if(ContributorMaps_Data::get()->filter('Email', $data['Email'])->exists()) {
                $form->addErrorMessage('Email', 'Sorry, this email address is already being used. ', 'bad');
                $errors++;
            };
            if(!($data['Skills_Base'] || $data['Skills_Calc'] || $data['Skills_Dev']
                || $data['Skills_Doc'] || $data['Skills_Draw'] || $data['Skills_Impress'] || $data['Skills_Infra'] 
                || $data['Skills_l10n'] || $data['Skills_Marketing'] || $data['Skills_Math'] || $data['Skills_QA']
                || $data['Skills_Writer'])) {
                $form->addErrorMessage('Skills', 'Sorry, you must choose at least 1 skill. ', 'bad');
                $errors++;
            };
            if($errors > 0) {
                Session::set("FormInfo.{$form->FormName()}.data", $data);
                return $this->redirect($this->Link("?registered=2"));
            };
            $submission = new ContributorMaps_Data();
            $form->saveInto($submission);
            $key = sha1(microtime(true).mt_rand(10000,90000));
            $submission->Unique_Key = $key;
            $submission->Confirmed = 0;
            $submission->Expiry = strtotime('+1 year');
            $submission->EditToken = 0;
            $submission->EditTokenRequest = date('Y-m-d');
            $submission->write(); 
            //Email User Confirmation Link
            $subject = "Please confirm your submission to the LibreOffice Contributor Maps";
            $body = "Thanks for your submission to the LibreOffice Contributor Maps! "
                    ."However, in order to ensure that you made this submission, you"
                    ." are required to confirm this email address by going to http://"
                    ."www.libreoffice.org/new-contributor-maps/AccountConfirmation?key=$key"
                    .". Your listing will be published to the site for a period of 1 year. After"
                    ." this period we will contact you again so that you can review and extend "
                    ."your information. Please note that your email address will be shown in public"
                    ." on The LibreOffice Contributor Maps site. ";
            $email = new Email("hostmaster@documentfoundation.org", $data['Email'], $subject, $body);
            $email->send();
            return $this->redirect($this->Link("?registered=1"));
        }
        public function processEditForm($data, $form) {
            $entry = ContributorMaps_Data::get()->filter(array(
                'Unique_Key' => $data['Key'],
                'EditToken' => $data['Token']
            ))->First();
            if($entry) {
                $errors = 0;
                if($entry->Email !== $data['Email']) {
                    //Email Confirmation Email Again
                    //Check if Email is used
                    if(ContributorMaps_Data::get()->filter('Email', $data['Email'])->exists()) {
                        $form->addErrorMessage('Email', 'Sorry, this email address is already being used. ', 'bad');
                        $errors++;
                    }else{
                        $entry->Email = $data['Email'];
                        //Email User Confirmation Link
                        $subject = "Please confirm your submission to the LibreOffice Contributor Maps";
                        $body = "Thanks for your submission to the LibreOffice Contributor Maps! "
                                ."However, in order to ensure that you made this submission, you"
                                ." are required to confirm this email address by going to http://"
                                ."www.libreoffice.org/new-contributor-maps/AccountConfirmation?key=$key"
                                .". Your listing will be published to the site for a period of 1 year. After"
                                ." this period we will contact you again so that you can review and extend "
                                ."your information. Please note that your email address will be shown in public"
                                ." on The LibreOffice Contributor Maps site. ";
                        $email = new Email("hostmaster@documentfoundation.org", $data['Email'], $subject, $body);
                        $email->send();
                        $entry->Confirmed = 0;
                    }
                }
                if(!($data['Skills_Base'] || $data['Skills_Calc'] || $data['Skills_Dev']
                    || $data['Skills_Doc'] || $data['Skills_Draw'] || $data['Skills_Impress'] || $data['Skills_Infra'] 
                    || $data['Skills_l10n'] || $data['Skills_Marketing'] || $data['Skills_Math'] || $data['Skills_QA']
                    || $data['Skills_Writer'])) {
                    $form->addErrorMessage('Skills', 'Sorry, you must choose at least 1 skill. ', 'bad');
                    $errors++;
                };
                $entry->Name = $data['Name'];
                $entry->Surname = $data['Surname'];
                $entry->Location = $data['Location'];
                $entry->Skills_Design = $data['Skills_Design'];
                $entry->Skills_Dev = $data['Skills_Dev'];
                $entry->Skills_Doc = $data['Skills_Doc'];
                $entry->Skills_Infra = $data['Skills_Infra'];
                $entry->Skills_l10n = $data['Skills_l10n'];
                $entry->Skills_Marketing = $data['Skills_Marketing'];
                $entry->Skills_QA = $data['Skills_QA'];
                $entry->Skills_Base = $data['Skills_Base'];
                $entry->Skills_Calc = $data['Skills_Calc'];
                $entry->Skills_Draw = $data['Skills_Draw'];
                $entry->Skills_Impress = $data['Skills_Impress'];
                $entry->Skills_Math = $data['Skills_Math'];
                $entry->Skills_Writer = $data['Skills_Writer'];
                if($errors > 0) {
                    Session::set("FormInfo.{$form->FormName()}.data", $data);
                    return $this->redirect($this->Link("?registered=3"));
                }else{
                    $entry->write();
                    return $this->redirect($this->Link("?action=edit&status=4"));
                }
            }else{
                return $this->redirect($this->Link("?action=edit&status=3"));
            }
        }