Initial Test

<?php

/**
 * Class FooBar_Controller
 */
class FooBar_Controller extends Page_Controller {

    private static $allowed_actions = array(
        'Form',
        'complete'
    );

    public function init() {
        parent::init();
        Requirements::javascript('mysite/javascript/script.js');
    }

    /**
     * Create form to handle the submit() method
     *
     * @return mixed
     */
    public function Form() {
        $action = new FormAction('submit', 'Make Payment');
        $action->useButtonTag = true;
        $action->addExtraClass('btn btn-primary btn-paypal');
        return Form::create($this, 'Form',
            new FieldList(),
            new FieldList(
                $action
            )
        );
    }

    /**
     * Assign a member to a Payment, then redirect to the gateway.
     *
     * @param $data
     * @param $form
     * @return bool|SS_HTTPResponse
     */
    public function submit($data, $form) {

        $memberID = Member::currentUserID();

        /**
         * Check if user exists, if not redirect to the previous page.
         */
        if(!$member = DataObject::get_by_id('Member', $memberID)) {
            // TODO: Display error
            $this->setFlash('You\re not currently logged in', 'danger');
            return $this->redirect($this->Link());
        }

        /**
         * Assign the member id to the payment
         * TODO: Check against a config/SiteConfig setting for the payment gateway, and price.
         */
        $payment = Payment::create()->init("PayPal_Express", 100, "NZD");
        /**
         * Assign the member id to the payment
         */
        $payment->MemberID = $memberID;

        /**
         * Go to payment Gateway
         * TODO: Customise Message
         */
        $response = PurchaseService::create($payment)
            ->setReturnUrl($this->Link('complete'))
            ->setCancelUrl($this->Link()."?message=payment cancelled")
            ->purchase($form->getData());
        $response->redirect();

    }

    /**
     * Redirect the user once a payment has been made.
     *
     * @return SS_HTTPResponse
     */
    public function complete() {
        //TODO: redirect to member page
        return $this->redirect(Director::absoluteBaseURL());
    }

}


<?php

class PaymentExtension extends DataExtension {

    private static $has_one = array(
        'Member' => 'Member'
    );

    /**
     * When a payment has been captured. Update the linked Member.
     *
     * @param $response
     */
    public function onCaptured($response) {
        /**
         * Check the member exists.
         */
        $member = $this->owner->Member();
        if($member->exists()){
            /**
             * Update the {ExpiryDate} of the Member to the payments edited time plus one year.
             * TODO: Add different time-frames.
             * TODO: Check for valid time.
             */
            $newExpiryDate = date('Y-m-d H:i:s.u', strtotime('+1 year', strtotime($this->owner->LastEdited)));
            $member->ExpiryDate = $newExpiryDate;
            $member->write();

        } else {
            // TODO: If there's no user found, email the admin
        }
    }

}

<?php

/**
 * Class MemberExtension
 */
class MemberExtension extends DataExtension {

    private static $db = array(
        'ExpiryDate' => 'Varchar(30)'
    );

    /**
     * @param FieldList $fields
     */
    public function updateCMSFields(FieldList $fields) {

        $fields->addFieldToTab('Root.Main', new TextField('ExpiryDate'));

        /* -----------------------------------------
         * Payments
         *
         * Just for reference purposes in individual members.
        ------------------------------------------*/

        $payments = Payment::get()->filter(array('MemberID' => $this->owner->ID));
        $config = GridFieldConfig_RelationEditor::create(100);
        $config->removeComponentsByType('GridFieldDeleteAction');
        $config->getComponentByType('GridFieldDataColumns')->setDisplayFields(array(
            'Created' => 'Created',
            'Money' => 'Money',
            'Gateway' => 'Gateway',
            'Status' => 'Status'
        ));
        $gridField = new GridField(
            'Payments',
            'Payments',
            $payments,
            $config
        );
        $fields->addFieldToTab('Root.Payments', $gridField);

    }

}