we-plugin-acl/commands/acl_role_permission_add.js

Role-based access control (RBAC) for We.js framework

const fs = require('fs'),
  path = require('path');

module.exports = function aclRolePermissionAddCommand (program) {

  program
  .command('acl:role:permission:add <roleName> <permission>')
  .alias('arpa')
  .description('Add one permission in role')
  .action(function (roleName, permission) {
    let cJSON,
      cFGpath = path.join(process.cwd(), '/config/configuration.json');
    // get old configs
    try {
      cJSON = JSON.parse(fs.readFileSync(cFGpath));
    } catch(e) {
      if (e.code == 'ENOENT') {
        fs.writeFileSync(cFGpath, '{}');
        cJSON = {};
      } else {
        throw e;
      }
    }

    // set default vars
    if (!cJSON.roles) cJSON.roles = {};
    if (!cJSON.roles[roleName]) throw new Error('role '+roleName+' dont exists');

    if (!cJSON.roles[roleName].permissions) {
      cJSON.roles[roleName].permissions = [];
    }

    // only add if not exits

    if (cJSON.roles[roleName].permissions.indexOf(permission) == -1) {
      cJSON.roles[roleName].permissions.push(permission);
    }

    fs.writeFile(cFGpath, JSON.stringify(cJSON, null, 2), function (err) {
      if (err) throw err;
    });
  });
};