66 lines
2.3 KiB
TypeScript
66 lines
2.3 KiB
TypeScript
import type { RingCalculatorInput, RingCalculatorResult } from '../types/calculator'
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/**
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* 校验计算器输入，所有数值字段必须为非负数
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* @throws Error 如果任意字段为负数
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*/
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export function validateInput(input: RingCalculatorInput): void {
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const fields: Array<[keyof RingCalculatorInput, string]> = [
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['goldWeight', '金重'],
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['mainStoneWeight', '主石重'],
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['sideStoneWeight', '副石重'],
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['lossRate', '损耗'],
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['moldGoldPrice', '倒模金价'],
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['mainStoneUnitPrice', '主石单价'],
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['sideStoneUnitPrice', '副石单价'],
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['sideStoneCount', '副石粒数'],
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['microSettingFee', '微镶费'],
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['mainStoneSettingFee', '主石镶费'],
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['threeDFee', '3D起板费'],
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['basicLaborCost', '基本工费'],
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['otherCost', '其他费用'],
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]
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for (const [key, label] of fields) {
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if (input[key] < 0) {
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throw new Error(`${label}不能为负数`)
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}
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}
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}
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/**
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* 钻戒计算器核心计算函数
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*
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* 公式：
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* - 净金重(g) = 金重(g) - 主石重(ct)×0.2 - 副石重(ct)×0.2
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* - 含耗重(g) = 净金重(g) × 损耗
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* - 金值(元) = 含耗重(g) × 倒模金价(元)
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* - 主石总价(元) = 主石重(ct) × 主石单价(元)
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* - 副石总价(元) = 副石重(ct) × 副石单价(元)
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* - 微镶总价(元) = 副石粒数(p) × 微镶费(元)
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* - 总价 = 金值 + 主石总价 + 副石总价 + 主石镶费 + 微镶总价 + 3D起板费 + 基本工费 + 其他费用
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*/
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export function calculateRing(input: RingCalculatorInput): RingCalculatorResult {
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validateInput(input)
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const netGoldWeight = input.goldWeight - input.mainStoneWeight * 0.2 - input.sideStoneWeight * 0.2
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const weightWithLoss = netGoldWeight * input.lossRate
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const goldValue = weightWithLoss * input.moldGoldPrice
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const mainStoneTotal = input.mainStoneWeight * input.mainStoneUnitPrice
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const sideStoneTotal = input.sideStoneWeight * input.sideStoneUnitPrice
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const microSettingTotal = input.sideStoneCount * input.microSettingFee
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const totalPrice = goldValue + mainStoneTotal + sideStoneTotal
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+ input.mainStoneSettingFee + microSettingTotal
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+ input.threeDFee + input.basicLaborCost + input.otherCost
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return {
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netGoldWeight,
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weightWithLoss,
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goldValue,
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mainStoneTotal,
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sideStoneTotal,
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microSettingTotal,
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totalPrice,
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}
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}
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