49 lines
1.2 KiB
TypeScript
49 lines
1.2 KiB
TypeScript
import { IsInt, IsNotEmpty, IsPositive } from "class-validator";
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import { ChildEntity, Column, ManyToOne } from "typeorm";
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import { Donation } from "./Donation";
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import { Runner } from "./Runner";
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/**
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* Defines a distance based donation.
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* Here people donate a certain amout per kilometer
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*/
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@ChildEntity()
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export class DistanceDonation extends Donation {
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/**
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* The runner associated.
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*/
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@IsNotEmpty()
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@ManyToOne(() => Runner, runner => runner.distanceDonations, { nullable: true })
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runner: Runner;
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/**
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* The amount the donor set to be donated per kilometer that the runner ran.
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*/
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@Column()
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@IsInt()
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@IsPositive()
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amountPerDistance: number;
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/**
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* The donation's amount in cents (or whatever your currency's smallest unit is.).
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* The exact implementation may differ for each type of donation.
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*/
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@IsInt()
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public get amount() {
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return this.getAmount();
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}
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/**
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* The function that calculates the amount based on the runner object's distance.
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*/
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public async getAmount(): Promise<number> {
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let calculatedAmount = -1;
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try {
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calculatedAmount = this.amountPerDistance * await this.runner.distance();
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} catch (error) {
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throw error;
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}
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return calculatedAmount;
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}
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}
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