Ordered Types

main.dart

void main() {
  var rootTypes = ["ABH", "ASH", "POH"];
  //var rootTypes = ["ABH", "POH", "ASH"];
  //var rootTypes = ["POH", "ASH", "ABH"];
  //var rootTypes = ["POH", "ABH", "ASH"];
  //var rootTypes = ["ASH", "POH", "ABH"];
  //var rootTypes = ["ASH", "ABH", "POH"];
  
  var orderedRootTypes = rootTypes;
  
  final precedingTelegrams = { "ABH": ["POH", "ASH"], "ASH": ["POH"] };
  
  print('Start order: $rootTypes');
  
  for (var type in rootTypes) {
    print('Iterating through root types: $type');
    
    var currentIndex = orderedRootTypes.indexOf(type);
    
    orderedRootTypes.removeAt(currentIndex);
    
    var maxIndex = precedingTelegrams[type]?.fold<int>(-1, (max, precedingTelegram) {
      var index = orderedRootTypes.indexOf(precedingTelegram);
      return index > max ? index : max;
    }) ?? -1;
    
    if (maxIndex >= currentIndex) {
      orderedRootTypes.insert(maxIndex + 1, type);
      print('New order: $orderedRootTypes');
      continue;
    }
    
    orderedRootTypes.insert(currentIndex, type);
    
    print('New order: $orderedRootTypes');
  }
  
  print('Final order: $orderedRootTypes');
}