options_config_2.ts

type Material = 'wood' | 'brick' | 'steel'

interface HouseOptions {
  rooms: number
  floors: number
  material: Material
  bathrooms: number
  squareFootage: number
  address: string
  constructionDate?: Date
}

class House {
  private rooms: number
  private floors: number
  private material: Material
  private bathrooms: number
  private squareFootage: number
  private address: string
  private constructionDate: Date

  constructor(options: HouseOptions) {
    if (options.rooms < 1) {
      throw new Error('invalid number of rooms!')
    }
    this.rooms = options.rooms
    if (options.floors < 1) {
      throw new Error('invalid number of floors!')
    }
    this.floors = options.floors
    this.material = options.material
    // handling of defaults and validation
    if (options.constructionDate === undefined) {
      this.constructionDate = new Date()
    } else {
      if (options.constructionDate > (new Date())) {
        throw new Error('construction date cannot be in the future!')
      }
      this.constructionDate = options.constructionDate
    }
    // etc ...
  }
}