@graphity/mapper/src/transformers/boolean-transformer.ts

Decorator-based transformer of plain object to class constructors for Javascript(& Typescript).

import { ValueTransformer } from '../interfaces/mapper'

export const booleanTransformer: ValueTransformer<any, boolean> = {
  to(source: any): boolean {
    if (source === null || typeof source === 'undefined') {
      return source
    }
    if (typeof source === 'boolean') {
      return source
    }
    return !!source
  },
}