@syncable/core/src/library/syncable/access-control-rule-decorator.ts

Syncable.

import {hasOwnProperty} from '../@utils';

import {AccessControlEntryRuleName} from './access-control';
import {
  AccessControlRuleEntry,
  AccessControlRuleTester,
  ISyncableObject,
} from './syncable-object';

export type AccessControlRuleDecorator = (
  target: ISyncableObject,
  name: string,
  descriptor: TypedPropertyDescriptor<AccessControlRuleTester>,
) => void;

export function AccessControlRule(
  explicitName?: string,
): AccessControlRuleDecorator {
  return (target, name, descriptor) => {
    let ruleName = (explicitName || name) as AccessControlEntryRuleName;

    let test = descriptor.value!;

    if (hasOwnProperty(target, '__accessControlRuleMap')) {
      target.__accessControlRuleMap.set(ruleName, {test});
    } else {
      let accessControlRules: [
        AccessControlEntryRuleName,
        AccessControlRuleEntry,
      ][];

      if (target.__accessControlRuleMap) {
        accessControlRules = [
          ...target.__accessControlRuleMap,
          [ruleName, {test}],
        ];
      } else {
        accessControlRules = [[ruleName, {test}]];
      }

      Object.defineProperty(target, '__accessControlRuleMap', {
        value: new Map(accessControlRules),
      });
    }
  };
}