first commit

wp-content/plugins/flexible-shipping/vendor_prefixed/wpdesk/wp-abtesting/composer.json

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+{
+    "name": "wpdesk\/wp-abtesting",
+    "authors": [
+        {
+            "name": "Krzysiek",
+            "email": "krzysiek@wpdesk.pl"
+        }
+    ],
+    "require": {
+        "php": ">=5.6",
+        "wpdesk\/wp-persistence": "^2.0"
+    },
+    "require-dev": {
+        "phpunit\/phpunit": "^5",
+        "wp-coding-standards\/wpcs": "^0.14.1",
+        "squizlabs\/php_codesniffer": "^3.0.2",
+        "wimg\/php-compatibility": "^8"
+    },
+    "autoload": {
+        "psr-4": {
+            "FSVendor\\WPDesk\\ABTesting\\": "src\/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "FSVendor\\WPDesk\\ABTesting\\Tests\\Unit\\": "tests\/unit\/"
+        }
+    },
+    "scripts": {
+        "phpunit-unit": "phpunit --configuration phpunit-unit.xml --coverage-text --colors=never",
+        "phpunit-unit-fast": "phpunit --configuration phpunit-unit.xml --no-coverage",
+        "phpunit-integration": "phpunit --configuration phpunit-integration.xml --coverage-text --colors=never",
+        "phpunit-integration-fast": "phpunit --configuration phpunit-integration.xml --no-coverage"
+    }
+}

wp-content/plugins/flexible-shipping/vendor_prefixed/wpdesk/wp-abtesting/src/ABTest.php

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+<?php
+
+namespace FSVendor\WPDesk\ABTesting;
+
+/**
+ * Test should know what variant should be used and that is all.
+ *
+ * @package WPDesk\ABTesting
+ */
+interface ABTest
+{
+    /**
+     * Return info about what variant of AB test should be used.
+     *
+     * @return ABVariant
+     */
+    public function get_variant();
+}

wp-content/plugins/flexible-shipping/vendor_prefixed/wpdesk/wp-abtesting/src/ABTest/EqualGroupsRandomABTest.php

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+<?php
+
+namespace FSVendor\WPDesk\ABTesting\ABTest;
+
+use FSVendor\WPDesk\ABTesting\ABTest;
+use FSVendor\WPDesk\Persistence\ElementNotExistsException;
+use FSVendor\WPDesk\Persistence\PersistentContainer;
+/**
+ * Base class for AB tests with equal groups generated by random number generator
+ *
+ * @package WPDesk\ABTesting\ABTest
+ */
+abstract class EqualGroupsRandomABTest implements \FSVendor\WPDesk\ABTesting\ABTest
+{
+    const CONTAINER_VALUE_PREFIX = 'ab_test';
+    /**
+     * Used to save info about generated variant
+     *
+     * @var PersistentContainer
+     */
+    private $container;
+    /**
+     * How many groups/variants are in the whole test
+     *
+     * @var int
+     */
+    private $variant_count;
+    /**
+     * Some unique test name for persitence pusposes and for higher readability
+     *
+     * @var string
+     */
+    private $test_name;
+    /**
+     * Derived classes can use this value to know what variant id is generated
+     *
+     * @var int
+     */
+    protected $current_variant_id;
+    /**
+     * @param int                 $variant_count Number of equal size groups to generate.
+     * @param string              $test_name     Specific test name. Should be unique. Used to persist.
+     * @param PersistentContainer $container     Container to persist data.
+     */
+    public function __construct($variant_count, $test_name, \FSVendor\WPDesk\Persistence\PersistentContainer $container)
+    {
+        \assert(\is_int($variant_count) && $variant_count > 0, '$variant_count makes no sense');
+        $this->variant_count = $variant_count;
+        $this->test_name = $test_name;
+        $this->container = $container;
+        $this->initialize_variant_id();
+    }
+    /**
+     * Clears info about variant and draws again
+     */
+    public function reset()
+    {
+        $this->container->set($this->get_container_key(), null);
+        $this->initialize_variant_id();
+    }
+    /**
+     * @return void
+     */
+    private function initialize_variant_id()
+    {
+        $variant_id = $this->get_variant_id_from_container();
+        if ($variant_id === null) {
+            $variant_id = $this->generate_variant_id();
+            $this->container->set($this->get_container_key(), $variant_id);
+        }
+        $this->current_variant_id = $variant_id;
+    }
+    /**
+     * Returns variant id if exists.
+     *
+     * @return int|null Returns null if not exists.
+     */
+    private function get_variant_id_from_container()
+    {
+        try {
+            $variant_id = $this->container->get($this->get_container_key());
+            return (int) $variant_id;
+        } catch (\FSVendor\WPDesk\Persistence\ElementNotExistsException $e) {
+            return null;
+        }
+    }
+    /**
+     * Key for where variant id should be saved in the persistence container
+     *
+     * @return string
+     */
+    protected function get_container_key()
+    {
+        return \implode('_', [self::CONTAINER_VALUE_PREFIX, $this->test_name, 'variant_id']);
+    }
+    /**
+     * @return int
+     */
+    private function generate_variant_id()
+    {
+        return \mt_rand(1, $this->variant_count);
+    }
+}

wp-content/plugins/flexible-shipping/vendor_prefixed/wpdesk/wp-abtesting/src/ABVariant.php

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+<?php
+
+namespace FSVendor\WPDesk\ABTesting;
+
+/**
+ * Specific variant should know what functionalities should be on/off.
+ *
+ * @package WPDesk\ABTesting
+ */
+interface ABVariant
+{
+    /**
+     * Checks if a variant does have a given functionality working.
+     *
+     * @param string $functionality
+     *
+     * @return bool
+     */
+    public function is_on($functionality);
+    /**
+     * Returns the variant id (can be numeric). For example for standard AB testing it would be A or B.
+     *
+     * @return string
+     */
+    public function get_variant_id();
+}

wp-content/plugins/flexible-shipping/vendor_prefixed/wpdesk/wp-abtesting/src/ABVariant/BasicABVariant.php

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+<?php
+
+namespace FSVendor\WPDesk\ABTesting\ABVariant;
+
+use FSVendor\WPDesk\ABTesting\ABVariant;
+/**
+ * Base class for variants. Nothing special.
+ *
+ * @package WPDesk\ABTesting\ABVariant
+ */
+abstract class BasicABVariant implements \FSVendor\WPDesk\ABTesting\ABVariant
+{
+    /** @var string */
+    private $variant_id;
+    /**
+     * @param string $variant_id
+     */
+    public function __construct($variant_id)
+    {
+        $this->variant_id = (string) $variant_id;
+    }
+    public abstract function is_on($functionality);
+    public function get_variant_id()
+    {
+        return $this->variant_id;
+    }
+}