open-nomad/ui/app/abilities/client.js

import AbstractAbility from './abstract';
import { computed, get } from '@ember/object';
import { or } from '@ember/object/computed';
import classic from 'ember-classic-decorator';

@classic
export default class Client extends AbstractAbility {
  // Map abilities to policy options (which are coarse for nodes)
  // instead of specific behaviors.
  @or('bypassAuthorization', 'selfTokenIsManagement', 'policiesIncludeNodeRead')
  canRead;

  @or('bypassAuthorization', 'selfTokenIsManagement', 'policiesIncludeNodeWrite')
  canWrite;

  @computed('token.selfTokenPolicies.[]')
  get policiesIncludeNodeRead() {
    return policiesIncludePermissions(this.get('token.selfTokenPolicies'), ['read', 'write']);
  }

  @computed('token.selfTokenPolicies.[]')
  get policiesIncludeNodeWrite() {
    return policiesIncludePermissions(this.get('token.selfTokenPolicies'), ['write']);
  }
}

function policiesIncludePermissions(policies = [], permissions = []) {
  // For each policy record, extract the Node policy
  const nodePolicies = policies
    .toArray()
    .map(policy => get(policy, 'rulesJSON.Node.Policy'))
    .compact();

  // Check for requested permissions
  return nodePolicies.some(policy => permissions.includes(policy));
}