first commit

app/Service/CouponService.php

@@ -0,0 +1,80 @@
+<?php
+/**
+ * The file was created by Assimon.
+ *
+ * @author    assimon<ashang@utf8.hk>
+ * @copyright assimon<ashang@utf8.hk>
+ * @link      http://utf8.hk/
+ */
+
+namespace App\Service;
+
+
+use App\Models\Coupon;
+
+class CouponService
+{
+
+    /**
+     * 获得优惠码，通过商品关联
+     *
+     * @param string $coupon 优惠码
+     * @param int $goodsID 商品id
+     * @return \Illuminate\Database\Eloquent\Builder|\Illuminate\Database\Eloquent\Model|object|null
+     *
+     * @author    assimon<ashang@utf8.hk>
+     * @copyright assimon<ashang@utf8.hk>
+     * @link      http://utf8.hk/
+     */
+    public function withHasGoods(string $coupon, int $goodsID)
+    {
+        $coupon = Coupon::query()->whereHas('goods', function ($query) use ($goodsID) {
+            $query->where('goods_id', $goodsID);
+        })->where('is_open', Coupon::STATUS_OPEN)->where('coupon', $coupon)->first();
+        return $coupon;
+    }
+
+    /**
+     * 设置优惠券已使用
+     * @param string $coupon
+     * @return bool
+     */
+    public function used(string $coupon): bool
+    {
+        return Coupon::query()
+            ->where('coupon',  $coupon)
+            ->update(['is_use' => Coupon::STATUS_USE]);
+    }
+
+    /**
+     * 设置优惠券使用次数 -1
+     * @param string $coupon
+     * @return int
+     *
+     * @author    assimon<ashang@utf8.hk>
+     * @copyright assimon<ashang@utf8.hk>
+     * @link      http://utf8.hk/
+     */
+    public function retDecr(string $coupon)
+    {
+        return Coupon::query()
+            ->where('coupon',  $coupon)
+            ->decrement('ret', 1);
+    }
+
+    /**
+     * 设置优惠券次数+1
+     *
+     * @param int $id
+     * @return int
+     *
+     * @author    assimon<ashang@utf8.hk>
+     * @copyright assimon<ashang@utf8.hk>
+     * @link      http://utf8.hk/
+     */
+    public function retIncrByID(int $id)
+    {
+        return Coupon::query()->where('id',  $id)->increment('ret', 1);
+    }
+
+}