PHP code example of zgldh / discount-and-coupon

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

zgldh / discount-and-coupon example snippets

    use zgldh\DiscountAndCoupon\Calculator;

    $calculator = new Calculator();         // 初始化计算器
    $result = $calculator
        ->setBenefits($discountCollection)  // 设置打算应用的 Benefit  可选 Optional
        ->setProducts([                      // 设置要买的货物            必填
            [
                'sku'       => 123,         // 货物 SKU 或 ID   必填
                'price'     => 2.80         // 货物原价         必填
                'category'  => 456,         // 货物分类 ID      可选。如不填写，无法参与针对分类的活动。
                'name'      => 'Coke Cola'  // 货物名           可选
                'foo'       => 'bar'        // 其他参数         可选
            ],
            ... // more products
         ])
        ->calculate();                      // 开始计算

    $result->getPrice();                    // 原始总价， 两位小数
    $result->getFinalPrice();               // 最终总价， 两位小数
    $result->getProfit();                   // final_price 减去 price
    $result->getBenefits();                 // 实际应用的 benefits， 内含每个 benefit 提供了多少 profit。

    foreach($result->getProducts() as $product) // 最终的货物集合，每个元素对应一个货物
    {
        $product->getSku();                     // 该货物 SKU
        $product->getPrice();                   // 货物原价
        $product->getFinalPrice();              // 货物均摊最终价 （仅供参考）
        $product->getCategory();                // 货物分类 ID
        $product->getName();                    // 货物名字
        $product->foo;                          // 其他参数
        $product->getBenefits();                // 该货物应用的 benefits
    }

use zgldh\DiscountAndCoupon\Benefit;

class FlatDiscountWhenPurchaseExceed extends Benefit{
    private $above = null;      // 满多少钱
    private $deduction = null;  // 减多少钱

    protected $priority = 100;    // 默认优先级

    protected function isScopeQualified($scopeProducts, $scopeTotalPrice)
    {
        return $scopeTotalPrice >= $this->above;
    }

    protected function newScopePrice($scopeProducts, $scopeTotalPrice)
    {
        return $scopeTotalPrice - $this->deduction;
    }
}

// 满20减2
$d2a20 = new FlatDiscountWhenPurchaseExceed(['above'=>20,'deduction'=>2,'priority'=>101]);
// 满50减10
$d10a50 = new FlatDiscountWhenPurchaseExceed(['above'=>50,'deduction'=>10,'priority'=>102]);
// 满100减30
$d30a100 = new FlatDiscountWhenPurchaseExceed(['above'=>100,'deduction'=>30,'priority'=>103]);

use zgldh\DiscountAndCoupon\Benefit;

const CATEGORY_BREAKFAST = 'breakfast';

class MidAutumnDayBreakfast80Discount extends Benefit{
    protected $priority = 200;    // 优先级

    protected $exclusive = true;  // 不与其他活动同享

    protected function scope(Product $product){
        return $product->category === CATEGORY_BREAKFAST;
    }

    protected function newScopePrice($scopeProducts, $scopeTotalPrice)
    {
        return $scopeTotalPrice * 0.8;
    }
}

$midAutumnDayDiscountEvent = new MidAutumnDayBreakfast80Discount();

use zgldh\DiscountAndCoupon\Benefit;

const SKU_YOGURT = 'yogurt';

class YogurtBuyOneGetOne extends Benefit{
    protected $priority = 500;    // 优先级

    protected $exclusive = true;  // 不与其他活动同享

    protected function scope(Product $product){
        return $product->sku === SKU_YOGURT;
    }

    protected function newScopePrice($scopeProducts, $scopeTotalPrice)
    {
        $productsCount = count($scopeProducts);
        $fairCount = ceil($productsCount / 2);
        $fairProductPrice = $scopeTotalPrice / $productsCount;
        return $fairProductPrice * $fairCount;
    }
}

$yogurtPromotion = new YogurtBuyOneGetOne();

use zgldh\DiscountAndCoupon\Benefit;
use zgldh\DiscountAndCoupon\Product;

const SKU_YOGURT = 'yogurt';

class YogurtBuyOneGetOne extends Benefit{
    protected $priority = 500;    // 优先级

    protected $exclusive = true;  // 不与其他活动同享

    protected function scope(Product $product){
        return $product->sku === SKU_YOGURT;
    }

    protected function newScopeProducts($scopeProducts, $scopeTotalPrice)
    {
        $count = count($scopeProducts);
        for($i = 0; $i<$count; $i++)
        {
            array_push($scopeProducts, new Product([
                'sku'=> SKU_YOGURT,
                'price'=>0
            ]));
        }
        return $scopeProducts;
    }
}

$yogurtPromotion = new YogurtBuyOneGetOne();

use zgldh\DiscountAndCoupon\Benefit;

class FlatDeduction extends Benefit{
    protected $priority = 0;    // 优先级
    protected $deduction = 0;
    protected $couponId = null;
    protected $groupMaxApplyTime = 2; // 最多可以同时用两张代金券

    protected function newScopePrice($scopeProducts, $scopeTotalPrice)
    {
        return max(0, $scopeTotalPrice - $this->deduction);
    }
}

$flatDeduction10= new FlatDeduction([ 'deduction'=>10, 'coupon_id'=>123 ]); // 10元代金券
$flatDeduction20= new FlatDeduction([ 'deduction'=>20, 'coupon_id'=>124 ]); // 20元代金券
$flatDeduction50= new FlatDeduction([ 'deduction'=>50, 'coupon_id'=>125 ]); // 50元代金券

use zgldh\DiscountAndCoupon\Benefit;

const SMALL_COKE = 'small-coke';
const BIG_COKE = 'big-coke';

class UpgradeBeverage extends Benefit{
    protected $priority = 500;    // 优先级

    protected function scope(Product $product){
        return $product->sku === SMALL_COKE;
    }

    protected function newScopeProducts($scopeProducts, $scopeTotalPrice)
    {
        $firstCoke = $scopeProducts[0];
        if($firstCoke)
        {
            $firstCoke['sku'] = BIG_COKE;
            $firstCoke['name'] = 'Big Coke';
        }
        return $scopeProducts;
    }
}