account-repository.js

class AccountNumber {
  constructor(num) {
    this.id = num;
  }
}

class Account {
  constructor(id, version, name, referenceId, accountNumber, created, updated) {
    this.id = id;
    this.version = version;
    this.name = name;
    this.referenceId = referenceId;
    this.accountNumber = accountNumber;
    this.created = created;
    this.updated = updated;
  }
}

const accounts = [];

const accountRepository = {
  save: (account) => {
    // This simulates a save to the DB where the IDs get allocated
    let id = Math.floor(Math.random() * Math.floor(100000));
    let accountNumber = Math.floor(Math.random() * Math.floor(100000));
    let version = Math.floor(Math.random() * Math.floor(10));
    account.id = id;
    account.version = version;
    account.accountNumber.id = accountNumber;
    accounts.push(account);
    return account;
  },

  findByAccountNumber: async (accountNumber) => {
    return accounts.find(
      (account) => account.accountNumber.id == accountNumber
    );
  },
};

module.exports = {
  Account,
  AccountNumber,
  accountRepository,
};