src/frontend.ts

// Copyright 2020 The Casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import { Enforcer } from './enforcer';
import { deepCopy } from './util';

/**
 * Experiment!
 * getPermissionForCasbinJs returns a string include the whole model.
 * You can pass the returned string to the frontend and manage your webpage widgets and APIs with Casbin.js.
 * @param e the initialized enforcer
 * @param user the user
 */
export async function casbinJsGetPermissionForUser(e: Enforcer, user?: string): Promise<string> {
  const obj: any = {};

  const m = e.getModel().model;
  let s = '';
  s += '[request_definition]\n';
  s += `r = ${m.get('r')?.get('r')?.value.replace(/_/g, '.')}\n`;
  s += '[policy_definition]\n';
  s += `p = ${m.get('p')?.get('p')?.value.replace(/_/g, '.')}\n`;
  if (m.get('g')?.get('g') !== undefined) {
    s += '[role_definition]\n';
    s += `g = ${m.get('g')?.get('g')?.value}\n`;
  }
  s += '[policy_effect]\n';
  s += `e = ${m.get('e')?.get('e')?.value.replace(/_/g, '.')}\n`;
  s += '[matchers]\n';
  s += `m = ${m.get('m')?.get('m')?.value.replace(/_/g, '.')}`;
  obj['m'] = s;
  obj['p'] = deepCopy(await e.getPolicy());
  for (const arr of obj['p']) {
    arr.splice(0, 0, 'p');
  }

  return JSON.stringify(obj);
}