55 lines
1.7 KiB
TypeScript
55 lines
1.7 KiB
TypeScript
/**
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* Volume Value Object
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* Represents shipping volume in CBM (Cubic Meters) and weight in KG
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*
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* Business Rule: Price is calculated using freight class rule:
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* - Take the higher of: (volumeCBM * pricePerCBM) or (weightKG * pricePerKG)
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*/
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export class Volume {
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constructor(
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public readonly cbm: number,
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public readonly weightKG: number,
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) {
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this.validate();
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}
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private validate(): void {
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if (this.cbm < 0) {
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throw new Error('Volume in CBM cannot be negative');
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}
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if (this.weightKG < 0) {
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throw new Error('Weight in KG cannot be negative');
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}
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if (this.cbm === 0 && this.weightKG === 0) {
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throw new Error('Either volume or weight must be greater than zero');
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}
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}
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/**
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* Check if this volume is within the specified range
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*/
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isWithinRange(minCBM: number, maxCBM: number, minKG: number, maxKG: number): boolean {
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const cbmInRange = this.cbm >= minCBM && this.cbm <= maxCBM;
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const weightInRange = this.weightKG >= minKG && this.weightKG <= maxKG;
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return cbmInRange && weightInRange;
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}
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/**
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* Calculate freight price using the freight class rule
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* Returns the higher value between volume-based and weight-based pricing
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*/
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calculateFreightPrice(pricePerCBM: number, pricePerKG: number): number {
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const volumePrice = this.cbm * pricePerCBM;
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const weightPrice = this.weightKG * pricePerKG;
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return Math.max(volumePrice, weightPrice);
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}
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equals(other: Volume): boolean {
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return this.cbm === other.cbm && this.weightKG === other.weightKG;
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}
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toString(): string {
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return `${this.cbm} CBM / ${this.weightKG} KG`;
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}
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}
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