enumValue<T> static method

T enumValue<T>(dynamic v, List<T> values, { required T def, })

Safely converts a dynamic value v to an Enum value from the provided values list.

Returns def if no match is found. Supports case-insensitive string matching and numeric index lookups.

Example:

enum Status { active, inactive }
JsonCare.enumValue("ACTIVE", Status.values, def: Status.inactive); // Status.active
JsonCare.enumValue(0, Status.values, def: Status.inactive);        // Status.active

Implementation

static T enumValue<T>(dynamic v, List<T> values, {required T def}) {
  if (v == null) return def;
  if (v is int) {
    if (v >= 0 && v < values.length) return values[v];
  }
  final String s = v.toString().trim().toLowerCase();
  final parsedIdx = int.tryParse(s);
  if (parsedIdx != null && parsedIdx >= 0 && parsedIdx < values.length) {
    return values[parsedIdx];
  }
  for (final value in values) {
    final name =
        value is Enum ? value.name : value.toString().split('.').last;
    if (name.toLowerCase() == s) {
      return value;
    }
  }
  _logMismatchedType("Enum", v);
  return def;
}