添加运费计算方法

app/Admin/Controllers/HomeController.php

@@ -3,12 +3,16 @@
 namespace App\Admin\Controllers;
 
 use App\Http\Controllers\Controller;
+use App\Services\ShippingService;
 use Dcat\Admin\Layout\Content;
 
 class HomeController extends Controller
 {
     public function index(Content $content)
     {
+        $shippingService = new ShippingService();
+        $amount = $shippingService->countShippingAmount(3560, 2000, 1, 2225);
+        dd($amount);
         return $content
             ->header('Dashboard')
             ->description('Description...');

app/Models/ShippingRule.php

@@ -12,6 +12,9 @@ class ShippingRule extends Model
     use HasFactory;
     use HasDateTimeFormatter;
 
+    public const TYPE_FREE = 1;//包邮
+    public const TYPE_WEIGHT = 2;//计算重量
+
     // protected $casts = [
     //     'info' => JsonArray::class,
     // ];

app/Services/ShippingService.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace App\Services;
+
+use App\Exceptions\BizException;
+use App\Models\ShippingRule;
+
+class ShippingService
+{
+    /**
+     * 运费模板根据地址，重量, 商品金额 计算运费; 重量传g，金额传分
+     *
+     * @param integer $weight
+     * @param integer $templateId
+     * @return void
+     */
+    public function countShippingAmount(int $weight, int $totalAmount, int $templateId, int $zoneId)
+    {
+        $shipping_amount = 0;
+        //获取运费规则；
+        $rules = ShippingRule::with('zones')->where('template_id', $templateId)->get();
+        $canShipping = true;//是否支持寄送
+        //如果该模板下无运费规则，则直接包邮
+        if ($rules->count() > 0) {
+            //按包邮/计重
+            $rules = $rules->sortBy('type');
+            foreach ($rules as $rule) {
+                $canShipping = false;
+                $_ruleInfo = json_decode($rule->info, true);
+
+                if (in_array($zoneId, $rule->zones->pluck('id')->toArray())) {
+                    $canShipping = true;
+                    if ($rule->type == ShippingRule::TYPE_FREE) {
+                        if ($totalAmount >= bcmul($_ruleInfo['threshold'], 100)) {//在包邮价格范围内
+                            break;//跳出foreach循环, 直接包邮
+                        }
+                    } elseif ($rule->type == ShippingRule::TYPE_WEIGHT) {
+                        $_firstWeight = (int) bcmul($_ruleInfo['first_weight'], 1000);
+                        $_firstWamount = (int) bcmul($_ruleInfo['first_w_amount'], 100);
+                        $_contiueWeight = (int) bcmul($_ruleInfo['continue_weight'], 1000);
+                        $_contiueWamount = (int) bcmul($_ruleInfo['continue_w_amount'], 100);
+                        if ($weight <= $_firstWeight) {
+                            $shipping_amount = $_firstWamount;
+                            break;
+                        } else {//计算续重价格
+                            $num = (int) bcdiv(($weight - $_firstWeight), $_contiueWeight);
+                            $shipping_amount = (int) bcadd($_firstWamount, bcmul($num+1, $_contiueWamount));
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        if (!$canShipping) {
+            throw new BizException('当前选择的地址有部分商品不支持配送');
+        }
+
+        return $this->returnAmount($shipping_amount);
+    }
+
+    /**
+     * 统一返回运费格式
+     *
+     * @param [type] $shipping_amount
+     * @return void
+     */
+    protected function returnAmount($shipping_amount)
+    {
+        return $shipping_amount;
+        // return bcdiv($shipping_amount, 100, 2);
+    }
+}

app/Traits/SkuInfo.php

@@ -29,7 +29,7 @@ trait SkuInfo
      */
     protected static function createSellPrice(float $price, float $specPrice)
     {
-        return bcadd($price, $specPrice);
+        return bcadd($price, $specPrice, 2);
     }
 
     /**
@@ -41,7 +41,7 @@ trait SkuInfo
      */
     protected static function createMarketPrice(float $price, float $specPrice)
     {
-        return bcadd($price, 0);
+        return bcadd($price, 0, 2);
     }
 
     /**
@@ -53,7 +53,7 @@ trait SkuInfo
      */
     protected static function createCostPrice(float $price, float $specPrice)
     {
-        return bcadd($price, 0);
+        return bcadd($price, 0, 2);
     }
 
     /**
@@ -65,7 +65,7 @@ trait SkuInfo
      */
     protected static function createVipPrice(?float $price, float $specPrice)
     {
-        return !is_null($price) ? bcadd($price, $specPrice) : null;
+        return !is_null($price) ? bcadd($price, $specPrice, 2) : null;
     }
 
     /**

database/migrations/2021_12_08_112027_create_shipping_rules_table.php

@@ -16,7 +16,7 @@ class CreateShippingRulesTable extends Migration
         Schema::create('shipping_rules', function (Blueprint $table) {
             $table->id();
             $table->unsignedBigInteger('template_id')->comment('模板ID');
-            $table->unsignedTinyInteger('type')->default(0)->comment('规则类型：0包邮，1计重');
+            $table->unsignedTinyInteger('type')->default(0)->comment('规则类型：1包邮，2计重');
             $table->json('info')->nullable()->comment('规则内容');
             $table->string('remarks')->nullable()->comment('规则备注');
             $table->timestamps();