progressOf method

int progressOf(
  1. String achievementId
)

Current progress for achievementId — 0 (never throws) for an id with no progress yet, whether or not it was ever registered. Keeps reflecting the true accumulated value even past the threshold (an already-completed achievement isn't "capped" at its threshold here).

Implementation

int progressOf(String achievementId) {
  _validateId(achievementId);
  return _progressMap[achievementId] ?? 0;
}