language js

function make_identifiable($original) js {
    return $original.text.replaceAll("-", "_");
}

function guess_name() {
    $original = current_filename_without_extension(),
    $identifiable = make_identifiable($original),
    return $identifiable
}


pattern convert_default_exports($export_name) {
  `export default $export` as $full_export where {
      $guess_name = guess_name(),
      $export_name = $guess_name,
      $export <: or {
          or {
              `async function $name() { $_ }` where { !$name <: ., $export_name = $name },
              `function $name() { $_ }` where { !$name <: ., $export_name = $name },
              `function* $name() { $_ }` where { !$name <: ., $export_name = $name },
              `class $name { $_ }` where { !$name <: ., $export_name = $name },
              `async function($params) { $body }` => `async function $guess_name($params) { $body }`,
              `function($params) { $body }` => `function $guess_name($params) { $body }`,
              `function* ($params) { $body }` => `function* $guess_name($params) { $body }`,
              `class { $body }` where {
                $class_name = capitalize($guess_name)
              } => `class $class_name { $body }`
          } where {
              $full_export => `export $export`
          },
          // handle expression statements
          `$_` where {
              $full_export => `export const $guess_name = $export;`
          }
      }
  }
}

convert_default_exports()