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AccessControl.js
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AccessControl.js
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/**
* @copyright Copyright (c) 2019 Maxim Khorin <maksimovichu@gmail.com>
*/
'use strict';
const Base = require('./ActionFilter');
module.exports = class AccessControl extends Base {
/**
* @param {Object} config
* @param {Object[]} config.rules - Rule configurations
* @param {function} config.deny - (action) => ...
*/
constructor (config) {
super({
AccessRule,
...config
});
}
getRules () {
if (!this._rules) {
this._rules = this.createRules();
}
return this._rules;
}
createRules () {
const rules = [];
for (const config of this.rules) {
if (!config.Class) {
config.Class = this.AccessRule;
}
rules.push(this.spawn(config));
}
return rules;
}
async beforeAction (action) {
// check rules until the first result [allow or deny]
for (const rule of this.getRules()) {
const access = await rule.can(action);
if (access === false) {
return this.denyAccess(rule, action);
}
if (access === true) {
return;
}
}
}
async denyAccess (rule, action) {
if (rule.deny) {
return rule.deny(action);
}
if (this.deny) {
return this.deny(action);
}
throw new Forbidden;
}
};
const AccessRule = require('./AccessRule');
const Forbidden = require('../error/http/Forbidden');