toEncodableJSONMap function

Map toEncodableJSONMap(Map? map)

Ensures that map is an encodable JSON tree.

Implementation

Map toEncodableJSONMap(Map? map) {
  if (map == null) return {};

  if (map is Map<String, num>) return map;
  if (map is Map<String, int>) return map;
  if (map is Map<String, double>) return map;
  if (map is Map<String, bool>) return map;
  if (map is Map<String, String>) return map;

  if (map.isEmpty) return <String, dynamic>{};

  if (map is Map<String, List<num>>) return map;
  if (map is Map<String, List<int>>) return map;
  if (map is Map<String, List<double>>) return map;
  if (map is Map<String, List<bool>>) return map;
  if (map is Map<String, List<String>>) return map;

  if (map is Map<String, Object> || map is Map<String, dynamic>) {
    var values = map.values.toList();

    if (isListEntriesAllOfType(values, num)) {
      return map.map((key, value) => MapEntry(key, value as num));
    } else if (isListEntriesAllOfType(values, int)) {
      return map.map((key, value) => MapEntry(key, value as int));
    } else if (isListEntriesAllOfType(values, double)) {
      return map.map((key, value) => MapEntry(key, value as double));
    } else if (isListEntriesAllOfType(values, bool)) {
      return map.map((key, value) => MapEntry(key, value as bool));
    } else if (isListEntriesAllOfType(values, String)) {
      return map.map((key, value) => MapEntry(key, value as String));
    }
  }

  return map.map((key, value) => MapEntry('$key', toEncodableJSON(value)));
}