Added config fields, added frontend model, not in working state (#1)

Added configuration fields

Block/Adminhtml/Form/Field/Checkouts.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Elgentos\HyvaCheckoutABTest\Block\Adminhtml\Form\Field;
+
+use Hyva\CheckoutCore\Block\Adminhtml\Element\FieldArray\TypeRenderer;
+use Magento\Backend\Block\Template\Context;
+use \Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray;
+use Magento\Framework\View\Helper\SecureHtmlRenderer;
+
+class Checkouts extends AbstractFieldArray
+{
+    private \Magento\Framework\View\Element\BlockFactory $blockFactory;
+    private \Hyva\CheckoutCore\Model\Config\Source\Checkout $checkoutSource;
+
+    public function __construct(
+        Context $context,
+        \Magento\Framework\View\Element\BlockFactory $blockFactory,
+        \Hyva\CheckoutCore\Model\Config\Source\Checkout $checkoutSource,
+        array $data = [],
+        ?SecureHtmlRenderer $secureRenderer = null
+    ) {
+        parent::__construct($context, $data, $secureRenderer);
+        $this->blockFactory = $blockFactory;
+        $this->checkoutSource = $checkoutSource;
+    }
+
+    protected function _prepareToRender()
+    {
+        $checkoutOptions = array_combine(
+            array_column($this->checkoutSource->toOptionArray(), 'value'),
+            array_column($this->checkoutSource->toOptionArray(), 'label')
+        );
+        $this->addColumn('checkout', [
+            'label' => __('Checkout'),
+            'class' => 'required-entry',
+            'renderer' => $this->blockFactory->createBlock(TypeRenderer::class)
+                ->setElementType('select')
+                ->setElementOptions($checkoutOptions),
+            'style' => 'width: 150px'
+        ]);
+        $this->addColumn('percentage', ['label' => __('Percentage Shown During Test'), 'class' => 'required-entry']);
+        $this->_addAfter = false;
+        $this->_addButtonLabel = __('Add Checkout');
+    }
+}

Plugin/PickRandomCheckout.php

@@ -6,11 +6,21 @@
 use Hyva\CheckoutCore\Model\CheckoutInformation\Luma;
 use Hyva\CheckoutCore\Model\Config;
 use Magento\Checkout\Model\Session as CheckoutSession;
+use Magento\Framework\App\Config\ScopeConfigInterface;
 use Magento\Framework\App\State;
+use Magento\Framework\Serialize\SerializerInterface;
 
 class PickRandomCheckout
 {
-    public function __construct(private CheckoutSession $checkoutSession, private State $appState) {
+    public const HYVA_CHECKOUT_AB_TEST_ENABLED = 'hyva_themes_checkout/ab_test/enable';
+    public const HYVA_CHECKOUT_AB_TEST_CHECKOUTS = 'hyva_themes_checkout/ab_test/checkouts';
+
+    public function __construct(
+        private readonly CheckoutSession $checkoutSession,
+        private readonly State $appState,
+        private readonly ScopeConfigInterface $config,
+        private readonly SerializerInterface $serializer
+    ) {
 
     }
 
@@ -25,26 +35,58 @@ public function afterGetActiveCheckoutNamespace(
         Config $subject,
         string $result
     ): string {
+        // When the AB test is disabled, use the default configuration
+        if (!$this->config->getValue(self::HYVA_CHECKOUT_AB_TEST_ENABLED)) {
+            return $result;
+        }
+
+        try {
+            $checkouts = $this->serializer->unserialize($this->config->getValue(self::HYVA_CHECKOUT_AB_TEST_CHECKOUTS));
+        } catch (Exception $e) {
+            $checkouts = [];
+        }
+
+        // When no checkouts are configured, use the default configuration
+        if (count($checkouts) === 0) {
+            return $result;
+        }
+
+        // When in developer mode, use the default configuration
+        if ($this->appState->getMode() !== State::MODE_DEVELOPER) {
+            return $result;
+        }
+
         // Retrieve the active checkout from the session, if present
         $activeCheckoutNamespace = $this->checkoutSession->getData('active_checkout_namespace');
         if ($activeCheckoutNamespace) {
             return $activeCheckoutNamespace;
         }
 
-        // 50% of the time, use the Luma checkout.
-        // Otherwise, default to the Hyva Checkout config
-        // Only do the AB test in production
-        if (
-            random_int(0, 1) &&
-            $this->appState->getMode() !== State::MODE_DEVELOPER
-        ) {
-            $result = Luma::NAMESPACE;
-        }
+        // Pick a random result based on percentage given
+        $result = $this->randomWithProbability($checkouts);
 
         // Save the randomly chosen checkout in the checkout session to make sure
         // this session always has the same checkout
         $this->checkoutSession->setData('active_checkout_namespace', $result);
         $this->checkoutSession->getQuote()->setData('active_checkout_namespace', $result)->save();
         return $result;
     }
+
+    /**
+     * @param $checkouts
+     *
+     * @return string
+     */
+    private function randomWithProbability($checkouts): string
+    {
+        $temp = [];
+        foreach ($checkouts as $checkout) {
+            $num = $checkout['percentage'];
+            while ($num > 0) {
+                $temp[] = $checkout['checkout'];
+                $num--;
+            }
+        }
+        return $temp[array_rand($temp)];
+    }
 }

etc/adminhtml/system.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Elgentos B.V.. All rights reserved.
+ * https://www.elgentos.nl/
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
+    <system>
+        <section id="hyva_themes_checkout">
+            <group id="ab_test" translate="label" type="text" sortOrder="15" showInDefault="1" showInWebsite="0" showInStore="0">
+                <label>A/B Test</label>
+                <field id="enabled" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
+                    <label>Enabled</label>
+                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
+                </field>
+                <field id="checkouts" translate="label" sortOrder="20" showInDefault="1" showInWebsite="0" showInStore="0">
+                    <label>Checkouts</label>
+                    <frontend_model>Elgentos\HyvaCheckoutABTest\Block\Adminhtml\Form\Field\Checkouts</frontend_model>
+                    <backend_model>Magento\Config\Model\Config\Backend\Serialized\ArraySerialized</backend_model>
+                </field>
+            </group>
+        </section>
+    </system>
+</config>