Corrodable.js

class CorrodableComponent extends Component {
  
  constructor(durability) {
    super(Priority.Normal)
    
    this.durability = {
      max: durability,
      current: durability
    }
  }
  
  handle(event) {
    if (event.type === 'corrode') {
      this.corrode(event.params.amount)
    } else if (event.type === 'repair') {
      this.repair()
    }
  }
  
  corrode(amount) {
    this.durability.current -= amount
    
    if (this.durability.current <= 0) {
      this.owner.destroy()
    }
  }
  
  repair() {
    this.durability.current = this.durability.max
  }
  
  query(query) {
    if (query.for === 'corroded') {
      query.result = this.durability.current < this.durability.max
    }
  }

}