156 lines
4.3 KiB
PHP
156 lines
4.3 KiB
PHP
<?php
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namespace App\Services;
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use App\Models\Coupon;
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use App\Models\ProductPart;
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use App\Models\ReceivePartCouponLog;
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use App\Models\User;
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use App\Models\UserCoupon;
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class CouponService
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{
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/**
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* 根据SKU商品获取可用优惠券
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*
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* @param User $user
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* @param array $products 至少包含以下内容
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* [
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* ['sku' => 商品SKU, 'quantity' => 10]
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* ]
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* @return array
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*/
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public function getAvailableCoupons(User $user, array $products): array
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{
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$coupons = $user->coupons()->onlyAvailable()->get();
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$coupons->load(['ranges' => function ($query) {
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$query->isEnable();
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}]);
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$availableCoupons = [];
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foreach ($coupons as $coupon) {
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// 是否满足券使用规则
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$passes = false;
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// 可用优惠券的商品的总额
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$amount = 0;
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foreach ($products as $product) {
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$sku = $product['sku'];
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if ($coupon->isSupport($sku)) {
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$passes = true;
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$amount += $sku->getRealPrice($user) * $product['quantity'];
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}
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}
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if ($passes && $amount >= $coupon->coupon_threshold) {
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$availableCoupons[] = $coupon;
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}
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}
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return $availableCoupons;
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}
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/**
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* 根据分区，领取优惠券
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*/
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public function receivePartCoupon(ProductPart $part, User $user)
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{
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//如果分区不显示，直接退出；
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if (!$part->is_show) {
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return;
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}
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//如果用户已领取过该分区设置的券，直接退出；
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if (ReceivePartCouponLog::where(['user_id'=>$user->id, 'part_id'=>$part->id])->exists()) {
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return;
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}
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//取出需要发放的券
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$coupons = Coupon::whereIn('id', $part->coupons->pluck('coupon_id')->toArray())->get();
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$coupons = $coupons->keyBy('id');
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$someCoupons = [];
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foreach ($part->coupons as $coupon) {
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$someCoupons[] = [
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'coupon'=>$coupons[$coupon->coupon_id],
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'num'=>$coupon->num,
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];
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}
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$this->receiveSomeCoupons($user, $someCoupons);
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ReceivePartCouponLog::create(['user_id'=>$user->id, 'part_id'=>$part->id]);
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}
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/**
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* 领取一批券
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*
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* @param User $user
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* @param array $coupons
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* @return void
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*/
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protected function receiveSomeCoupons(User $user, array $coupons)
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{
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$userCoupons = [];
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foreach ($coupons as $coupon) {
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for ($i=0; $i<$coupon['num']; $i++) {
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$userCoupons[] = self::createUserCouponData($user->id, $coupon['coupon']);
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}
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//更新对应券发送量，余量;
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$coupon['coupon']->increment('sent', $coupon['num']);
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if ($coupon['coupon']->limit > 0) {//限量才减少余量
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$coupon['coupon']->decrement('stock', $coupon['num']);
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}
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}
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UserCoupon::insert($userCoupons);
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}
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/**
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* todo-领取指定券
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*
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* @param User $user
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* @param Coupon $coupon
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* @param int $num
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* @return void
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*/
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public function receiveCoupon(User $user, Coupon $coupon, int $num = 1)
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{
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return;
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}
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/**
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* 创建用户券数据
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*
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* @return array
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*/
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public static function createUserCouponData(int $userId, Coupon $coupon)
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{
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//如果userId小于等于0，直接退出
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if ($userId <= 0) {
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return [];
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}
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if ($coupon->use_start_at && $coupon->use_end_at) {
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$useStartAt = $coupon->use_start_at;
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$useEndAt = $coupon->use_end_at;
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} else {
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$useStartAt = now();
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$useEndAt = now()->addDays($coupon->use_day);
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}
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return [
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'user_id' => $userId,
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'coupon_id' => $coupon->id,
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'coupon_name' => $coupon->name,
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'coupon_type' => $coupon->type,
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'coupon_amount' => (int) bcmul($coupon->amount, 100),
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'coupon_threshold'=> (int) bcmul($coupon->threshold, 100),
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'use_start_at' => $useStartAt,
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'use_end_at' => $useEndAt,
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'created_at' => now(),
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'updated_at' => now(),
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];
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}
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}
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