static void Main(string[] args)
{
FileInputReader reader = new FileInputReader();
DiscTowerFactory factory = new DiscTowerFactory(reader);
DiscTower tower = factory.CreateFromInput("Inputs/day-7.txt");
// Part one
Console.WriteLine(tower.GetRootDisc().Name);
// Part two
Console.WriteLine(tower.FindBalancingProgramWeight());
}
public DiscTower CreateFromInput(string input)
{
DiscTower tower = new DiscTower();
IEnumerable <string> lines = _reader.ReadInput(input);
foreach (string line in lines)
{
var parsedDisc = _extractDisc(line);
var disc = tower.GetDisc(parsedDisc.Name);
if (disc != null)
{
// If this disc is already in the tower, this means it is the child
// of some other disc, but now we know the weight of it.
disc.SetWeight(parsedDisc.Weight);
}
else
{
disc = parsedDisc;
// If this disc isn't in the tower already, we'll want to add it.
tower.AddDisc(parsedDisc);
}
// If there are children for this disc, we will want to set up all the right
// relationships.
if (_hasChildren(line))
{
var parsedChildren = _extractChildren(line);
foreach (DiscProgram child in parsedChildren)
{
var childDisc = tower.GetDisc(child.Name);
if (childDisc != null)
{
disc.AddChild(childDisc);
}
else
{
tower.AddDisc(child);
disc.AddChild(child);
}
}
}
}
return(tower);
}
public void CreateDiscTowersFromInput()
{
string input = @"pbga (66)
xhth (57)
ebii (61)
havc (66)
ktlj (57)
fwft (72) -> ktlj, cntj, xhth
qoyq (66)
padx (45) -> pbga, havc, qoyq
tknk (41) -> ugml, padx, fwft
jptl (61)
ugml (68) -> gyxo, ebii, jptl
gyxo (61)
cntj (57)";
StringInputReader reader = new StringInputReader();
DiscTowerFactory factory = new DiscTowerFactory(reader);
DiscTower tower = factory.CreateFromInput(input);
Assert.Equal("tknk", tower.GetRootDisc().Name);
}
