json5.ts

import { Jsonic } from 'jsonic'

type Json5Options = {}

function Json5(jsonic: Jsonic, _options: Json5Options) {
  jsonic.options({
    text: {
      modify: (val: any) => {
        let out = 'string' === typeof val ?
          val.replace(
            /\\u[0-9a-fA-F]{4}/g,
            (m) => String.fromCodePoint(parseInt(m.substring(2), 16))) :
          val
        return out
      }
    },
    value: {
      map: {
        'Infinity': { val: Infinity },
        '+Infinity': { val: Infinity },
        '-Infinity': { val: -Infinity },
        '+NaN': { val: NaN },
        '-NaN': { val: -NaN },
      }
    },
    space: {
      chars: '\t\v\f \u00A0\uFEFF\n\r\u2028\u2029\u2003'
    },
    string: {
      escape: {
        '0': '\0',
        '\r': '',
        '\n': '',
        '\u2028': '',
        '\u2029': '',
      },

      // This is a hackish (ie. accepts a superset) way to support '"\\\r\n"' escapes.
      // A "proper" solution would use a custom StringMatcher.
      replace: {
        '\n': '',
      }
    },
  })
}

export { Json5 }

export type { Json5Options }