55 lines
1.7 KiB
TypeScript
55 lines
1.7 KiB
TypeScript
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const KG_PER_CBM = 167
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const KG_PER_BILLABLE_CBM = 363
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function formatFormulaNumber(value: number) {
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return value.toLocaleString('zh-CN', { maximumFractionDigits: 6, useGrouping: false })
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}
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export interface PriceEstimateBreakdown {
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actualLabel: string
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actualQuantity: number
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convertedLabel: string
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convertedQuantity: number
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convertedFormula: string
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chargeableLabel: string
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basisLabel: string
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}
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/**
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* Explains the server's current first-leg chargeable-quantity rules. The server
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* response remains authoritative for the final chargeable quantity and amount.
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*/
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export function createPriceEstimateBreakdown(
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actualWeightKg: number,
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actualVolumeCbm: number,
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chargeUnit: string,
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): PriceEstimateBreakdown | null {
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if (chargeUnit === 'KG') {
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const volumeWeightKg = actualVolumeCbm * KG_PER_CBM
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return {
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actualLabel: '实际毛重',
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actualQuantity: actualWeightKg,
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convertedLabel: '体积重量',
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convertedQuantity: volumeWeightKg,
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convertedFormula: `${formatFormulaNumber(actualVolumeCbm)} m³ × ${KG_PER_CBM}`,
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chargeableLabel: '计费重量',
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basisLabel: actualWeightKg >= volumeWeightKg ? '采用实际毛重' : '采用体积重量',
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}
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}
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if (chargeUnit === 'CBM') {
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const convertedVolumeCbm = actualWeightKg / KG_PER_BILLABLE_CBM
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return {
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actualLabel: '实际体积',
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actualQuantity: actualVolumeCbm,
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convertedLabel: '重量折算体积',
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convertedQuantity: convertedVolumeCbm,
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convertedFormula: `${formatFormulaNumber(actualWeightKg)} KG ÷ ${KG_PER_BILLABLE_CBM}`,
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chargeableLabel: '计费体积',
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basisLabel: actualVolumeCbm >= convertedVolumeCbm ? '采用实际体积' : '采用重量折算体积',
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}
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}
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return null
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}
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