public IEnumerable <IStaticEntity> Decode(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
return(Enumerable.Empty <IStaticEntity>());
}
string[] parts = input.Split("!");
if (parts.Length == 2)
{
_gameBoard.TerrainSeed = int.Parse(parts[0]);
input = parts[1];
}
else if (parts.Length > 2)
{
throw new InvalidOperationException("You are using a share code from the future, and this is the past. Please stop.");
}
var staticEntities = new List <IStaticEntity>();
var br = new BitReader(Convert.FromBase64String(input));
int col = 0;
int row = 0;
int count = 1;
while (!br.EndOfBytes())
{
if (br.ReadBit() == 0)
{
// Base64 likes to pad extra 0's, so just to be safe!
if (br.EndOfBytes())
{
break;
}
// Track
if (br.ReadBit() == 0)
{
// Empty
col += count;
}
else
{
// Track Piece
var dir = (TrackEncoding)br.Read4BitInt();
for (int i = 0; i < count; i++)
{
staticEntities.Add(new Track()
{
Column = col++,
Row = row,
Direction = s_directionMap[dir]
});
}
}
count = 1;
}
else
{
// Control
if (br.ReadBit() == 0)
{
// Repeat
count = br.Read3BitInt();
}
else
{
// Misc
if (br.ReadBit() == 0)
{
// End Of Line
col = 0;
row += count;
}
else
{
// Experimental Tree
for (int i = 0; i < count; i++)
{
staticEntities.Add(new Tree()
{
Column = col++,
Row = row
});
}
}
count = 1;
}
}
}
return(staticEntities);
}
public IEnumerable <Track> Decode(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
return(Enumerable.Empty <Track>());
}
var tracks = new List <Track>();
var br = new BitReader(Convert.FromBase64String(input));
int col = 0;
int row = 0;
int count = 1;
while (!br.EndOfBytes())
{
if (br.ReadBit() == 0)
{
// Base64 likes to pad extra 0's, so just to be safe!
if (br.EndOfBytes())
{
break;
}
// Track
if (br.ReadBit() == 0)
{
// Empty
col += count;
}
else
{
// Track Piece
var dir = (TrackEncoding)br.Read4BitInt();
for (int i = 0; i < count; i++)
{
tracks.Add(new Track(null)
{
Column = col++,
Row = row,
Direction = s_directionMap[dir]
});
}
}
count = 1;
}
else
{
// Control
if (br.ReadBit() == 0)
{
// Repeat
count = br.Read3BitInt();
}
else
{
// Misc
if (br.ReadBit() == 0)
{
// End Of Line
col = 0;
row += count;
count = 1;
}
else
{
// Experimental
throw new Exception("Potato is a fruit, implement this please <3");
}
}
}
}
return(tracks);
}