TransactionResult AddScoreTransaction()

in database/testapp/Assets/Firebase/Sample/Database/UIHandler.cs [124:160]

• 28 lines of code
• 7 McCabe index (conditional complexity)

    TransactionResult AddScoreTransaction(MutableData mutableData) {
      List<object> leaders = mutableData.Value as List<object>;

      if (leaders == null) {
        leaders = new List<object>();
      } else if (mutableData.ChildrenCount >= MaxScores) {
        // If the current list of scores is greater or equal to our maximum allowed number,
        // we see if the new score should be added and remove the lowest existing score.
        long minScore = long.MaxValue;
        object minVal = null;
        foreach (var child in leaders) {
          if (!(child is Dictionary<string, object>))
            continue;
          long childScore = (long)((Dictionary<string, object>)child)["score"];
          if (childScore < minScore) {
            minScore = childScore;
            minVal = child;
          }
        }
        // If the new score is lower than the current minimum, we abort.
        if (minScore > score) {
          return TransactionResult.Abort();
        }
        // Otherwise, we remove the current lowest to be replaced with the new score.
        leaders.Remove(minVal);
      }

      // Now we add the new score as a new entry that contains the email address and score.
      Dictionary<string, object> newScoreMap = new Dictionary<string, object>();
      newScoreMap["score"] = score;
      newScoreMap["email"] = email;
      leaders.Add(newScoreMap);

      // You must set the Value to indicate data at that location has changed.
      mutableData.Value = leaders;
      return TransactionResult.Success(mutableData);
    }