65 lines
2.6 KiB
PHP
65 lines
2.6 KiB
PHP
<?php
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namespace App\Services;
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use App\Exceptions\ShippingNotSupportedException;
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use App\Models\ShippingRule;
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class ShippingService
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{
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/**
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* 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
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*
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* @param integer $weight
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* @param integer $totalAmount
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* @param integer $templateId
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* @param integer $zoneId
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* @return integer
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*
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* @throws \App\Exceptions\ShippingNotSupportedException
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*/
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public function countShippingAmount(int $weight, int $totalAmount, int $templateId, int $zoneId): int
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{
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$shipping_amount = 0;
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$canShipping = true;//是否支持寄送
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//如果该模板下无运费规则，则直接包邮
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if (ShippingRule::where('template_id', $templateId)->count() > 0) {
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$canShipping = false;
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//只拿有这个地区配置的模板规则，减少sql查询市区数量
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$rules = ShippingRule::with('zones')->where('template_id', $templateId)->whereHas('zones', function ($q) use ($zoneId) {
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return $q->where('zones.id', $zoneId);
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})->get();
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//按包邮/计重
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$rules = $rules->sortBy('type');//优先计算包邮
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foreach ($rules as $rule) {
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$_ruleInfo = json_decode($rule->info, true);
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$canShipping = true;
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if ($rule->type == ShippingRule::TYPE_FREE) {
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if ($totalAmount >= bcmul($_ruleInfo['threshold'], 100)) {//在包邮价格范围内
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break;//跳出foreach循环, 直接包邮
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}
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} elseif ($rule->type == ShippingRule::TYPE_WEIGHT) {
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$_firstWeight = (int) bcmul($_ruleInfo['first_weight'], 1000);
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$_firstWamount = (int) bcmul($_ruleInfo['first_w_amount'], 100);
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$_contiueWeight = (int) bcmul($_ruleInfo['continue_weight'], 1000);
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$_contiueWamount = (int) bcmul($_ruleInfo['continue_w_amount'], 100);
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if ($weight <= $_firstWeight) {
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$shipping_amount = $_firstWamount;
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break;
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} else {//计算续重价格
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$num = (int) bcdiv(($weight - $_firstWeight), $_contiueWeight);
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$shipping_amount = (int) bcadd($_firstWamount, bcmul($num+1, $_contiueWamount));
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break;
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}
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}
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}
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}
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if (!$canShipping) {
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throw new ShippingNotSupportedException();
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}
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return $shipping_amount;
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}
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}
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