images.entity.ts

import { Image } from './image'
import {
  IsInt,
  IsNotEmpty,
  validateSync,
  ValidationError
} from 'class-validator'

export class ImageEntity implements Image {
  @IsNotEmpty()
  readonly id: number
  @IsNotEmpty()
  readonly productId: number
  @IsNotEmpty()
  readonly createdAt: number
  @IsNotEmpty()
  readonly updatedAt: number

  constructor({
    id,
    productId,
    createdAt,
    updatedAt
  }: Image) {
    this.id = id
    this.productId = productId
    this.createdAt = createdAt
    this.updatedAt = updatedAt
  }

  toObject(): Image {
    const {
      id,
      productId,
      createdAt,
      updatedAt
    }: Image = this
    return {
      id,
      productId,
      createdAt,
      updatedAt
    }
  }
  
  validate(): void {
    try {
      validateSync(this)
    } catch (e) {
      // not to handle error because validating response is duty of controllers
      throw new ValidationError()
    }
  }
}