lib/role.js
/**
* Copyright 2015 Oursky Ltd.
*
* 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 _ from 'lodash';
const definedRoles = {};
export default class Role {
constructor(name) {
if (!Role.isValidName(name)) {
throw new Error(
'Role name is not valid. Please start with alphanumeric string.');
}
this._name = name;
}
get name() {
return this._name;
}
static isValidName(name) {
if (!name) {
return false;
}
return true;
}
static define(name) {
var defined = definedRoles[name];
if (defined !== undefined) {
return defined;
}
defined = new Role(name);
definedRoles[name] = defined;
return defined;
}
static union(roles, aRole) {
let duplicatedRole = _.find(roles, function (perRole) {
return perRole.name === aRole.name;
});
if (duplicatedRole === undefined) {
return _.union(roles, [aRole]);
} else {
return roles;
}
}
static subtract(roles, aRole) {
return _.filter(roles, function (perRole) {
return perRole.name !== aRole.name;
});
}
static contain(roles, aRole) {
return _.find(roles, function (perRole) {
return perRole.name === aRole.name;
}) !== undefined;
}
}