src/infrastructure/Repository/InMemoryRepository.ts
import type { Repository } from '../../application/Repository/Repository';
import type { RepositoryEntity, RepositoryEntityId } from '../../application/Repository/RepositoryEntity';
export class InMemoryRepository<TEntity extends RepositoryEntity>
implements Repository<TEntity> {
private readonly items: TEntity[];
constructor(items?: readonly TEntity[]) {
this.items = new Array<TEntity>();
if (items) {
this.items.push(...items);
}
}
public get length(): number {
return this.items.length;
}
public getItems(predicate?: (entity: TEntity) => boolean): TEntity[] {
return predicate ? this.items.filter(predicate) : this.items;
}
public getById(id: RepositoryEntityId): TEntity {
const items = this.getItems((entity) => entity.id === id);
if (!items.length) {
throw new Error(`missing item: ${id}`);
}
return items[0];
}
public addItem(item: TEntity): void {
if (this.exists(item.id)) {
throw new Error(`Cannot add (id: ${item.id}) as it is already exists`);
}
this.items.push(item);
}
public addOrUpdateItem(item: TEntity): void {
if (this.exists(item.id)) {
this.removeItem(item.id);
}
this.items.push(item);
}
public removeItem(id: RepositoryEntityId): void {
const index = this.items.findIndex((item) => item.id === id);
if (index === -1) {
throw new Error(`Cannot remove (id: ${id}) as it does not exist`);
}
this.items.splice(index, 1);
}
public exists(id: RepositoryEntityId): boolean {
const index = this.items.findIndex((item) => item.id === id);
return index !== -1;
}
}