134 lines
3.4 KiB
PHP
134 lines
3.4 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: shenyang
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* Date: 2019/1/23
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* Time: 10:03 AM
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*/
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namespace app\frontend\modules\order;
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use app\common\exceptions\AppException;
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use Illuminate\Support\Collection;
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trait PriceNodeTrait
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{
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/**
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* @var Collection
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*/
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public $priceCache;
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/**
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* @var Collection
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*/
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private $priceNodes;
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/**
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* @return Collection
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*/
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public function getPriceNodes()
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{
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if (!isset($this->priceNodes)) {
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$this->priceNodes = $this->_getPriceNodes();
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}
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return $this->priceNodes;
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}
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/**
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* 获取某个节点之后的价格
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* @param $key
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* @return mixed
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* @throws AppException
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*/
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public function getPriceAfter($key)
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{
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if (!isset($this->priceCache[$key])) {
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// 找到对应的节点
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$priceNode = $this->getPriceNodes()->first(function (PriceNode $priceNode) use ($key) {
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return $priceNode->getKey() == $key;
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});
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if (!$priceNode) {
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throw new AppException("不存在的价格节点{$key}");
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}
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$this->priceCache[$key] = $priceNode->getPrice();
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}
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return $this->priceCache[$key];
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}
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public function getCurrentPrice()
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{
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if(!is_array($this->priceCache)){
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return $this->getPriceNodes()->first()->getPrice();
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}
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return array_last($this->priceCache);
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}
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/**
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* 获取某个节点之前的价格
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* @param $key
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* @return mixed
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* @throws AppException
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*/
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public function getPriceBefore($key)
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{
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$nodeKey = '';
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$hasKey = false;
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foreach ($this->getPriceNodes() as $priceNode) {
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if ($priceNode->getKey() == $key) {
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$hasKey = true;
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break;
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}
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$nodeKey = $priceNode->getKey();
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}
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if(!$hasKey){
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throw new \Exception("没有key为{$key}的节点");
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}
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if (empty($nodeKey)) {
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throw new \Exception("没有{$key}更先计算的节点了");
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}
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return $this->getPriceAfter($nodeKey);
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}
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public function getPriceBeforeWeight($key)
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{
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$weight = 0;
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foreach ($this->getPriceNodes() as $priceNode) {
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//todo 主要是第一个抵扣会忽悠当前节点前一个节点的金额，所以这里返回当前节点排序
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//todo 使用大于判断会忽略与当前节点同一种排序数值的金额
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$weight = $priceNode->getWeight();
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if ($priceNode->getKey() == $key) {
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break;
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}
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// $weight = $priceNode->getWeight();
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}
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$nodeKey = $this->getPriceNodes()->filter(function ($priceNode) use ($weight) {
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return $priceNode->getWeight() < $weight;
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})->last()->getKey();
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if (empty($nodeKey)) {
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throw new \Exception("没有比{$weight}权重更小节点了");
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}
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return $this->getPriceAfter($nodeKey);
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}
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/**
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* 验证某个节点是否已存在
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* @param $key
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* @return bool true 存在 false 不存在
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*/
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public function verifyPriceNodes($key)
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{
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// 找到对应的节点
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$priceNode = $this->getPriceNodes()->first(function (PriceNode $priceNode) use ($key) {
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return $priceNode->getKey() == $key;
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});
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if (!$priceNode) {
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return false;
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}
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return true;
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}
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} |