I have a resolver class that does some data validation and I want to also use it so it can be pushed into an array. Obviously I don't want to push the class but a specific object structure into the array.

type RoleReward = {
  roleId: Snowflake;
  rewardName: string;
  redeemed: boolean;
}

const resolver = new BaseRoleResolver();
const allRewards = new Array<RoelReward>();

allRewards.push(resolver);

and the resolvers all use this base class

export class BaseRoleResolver {
  roleId: Snowflake;
  rewardName: string;
  redeemed: boolean = false;

  (...)

  valueOf() {
    return {
      roleId: this.roleId,
      rewardName: this.rewardName,
      redeemed: this.redeemed,
    };
  }
}

Can I make use of Javascript calling some prototype function on the class that I can just overwrite to return the custom object format instead of the entire class object?

EDIT: Clarified first code snippet

CodePudding user response：

What prototype function does Array.prototype.push use on the passed elements

None. It just puts whatever values you pass to it into the array.

Can I make use of Javascript calling some method on the object that I can just overwrite?

No.

I don't want to push the class but a specific object structure into the array.

Then you will have to write your code so it does that:

  for (const resolver of roleResolvers) {
    if (
      (await resolver.qualifiesForReward(validOrders, email)) &&
      !resolver.alreadyRedeemed(allRewards)
    ) {
      allRewards.push(resolver.valueOf());
//                             ^^^^^^^^^
    }
  }