120 lines
2.9 KiB
TypeScript
120 lines
2.9 KiB
TypeScript
/**
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* Domain Entity: Track
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*
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* Represents a racing track/circuit in the GridPilot platform.
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* Immutable entity with factory methods and domain validation.
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*/
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export type TrackCategory = 'oval' | 'road' | 'street' | 'dirt';
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export type TrackDifficulty = 'beginner' | 'intermediate' | 'advanced' | 'expert';
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export class Track {
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readonly id: string;
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readonly name: string;
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readonly shortName: string;
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readonly country: string;
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readonly category: TrackCategory;
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readonly difficulty: TrackDifficulty;
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readonly lengthKm: number;
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readonly turns: number;
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readonly imageUrl?: string;
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readonly gameId: string;
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private constructor(props: {
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id: string;
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name: string;
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shortName: string;
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country: string;
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category: TrackCategory;
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difficulty: TrackDifficulty;
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lengthKm: number;
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turns: number;
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imageUrl?: string;
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gameId: string;
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}) {
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this.id = props.id;
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this.name = props.name;
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this.shortName = props.shortName;
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this.country = props.country;
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this.category = props.category;
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this.difficulty = props.difficulty;
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this.lengthKm = props.lengthKm;
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this.turns = props.turns;
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this.imageUrl = props.imageUrl;
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this.gameId = props.gameId;
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}
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/**
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* Factory method to create a new Track entity
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*/
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static create(props: {
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id: string;
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name: string;
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shortName?: string;
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country: string;
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category?: TrackCategory;
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difficulty?: TrackDifficulty;
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lengthKm: number;
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turns: number;
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imageUrl?: string;
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gameId: string;
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}): Track {
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this.validate(props);
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return new Track({
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id: props.id,
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name: props.name,
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shortName: props.shortName ?? props.name.slice(0, 3).toUpperCase(),
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country: props.country,
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category: props.category ?? 'road',
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difficulty: props.difficulty ?? 'intermediate',
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lengthKm: props.lengthKm,
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turns: props.turns,
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imageUrl: props.imageUrl,
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gameId: props.gameId,
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});
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}
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/**
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* Domain validation logic
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*/
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private static validate(props: {
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id: string;
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name: string;
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country: string;
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lengthKm: number;
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turns: number;
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gameId: string;
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}): void {
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if (!props.id || props.id.trim().length === 0) {
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throw new Error('Track ID is required');
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}
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if (!props.name || props.name.trim().length === 0) {
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throw new Error('Track name is required');
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}
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if (!props.country || props.country.trim().length === 0) {
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throw new Error('Track country is required');
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}
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if (props.lengthKm <= 0) {
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throw new Error('Track length must be positive');
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}
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if (props.turns < 0) {
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throw new Error('Track turns cannot be negative');
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}
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if (!props.gameId || props.gameId.trim().length === 0) {
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throw new Error('Game ID is required');
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}
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}
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/**
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* Get formatted length string
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*/
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getFormattedLength(): string {
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return `${this.lengthKm.toFixed(2)} km`;
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}
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} |