/// <summary>
/// Find similar files by grouping those of the exact same size together.
/// </summary>
static void AnalyzeSimilarity(IEnumerable <INode> nodes, DriveInfo driveInfo)
{
IDictionary <UInt64, List <INode> > sizeAggregate =
Algorithms.AggregateBySize(nodes, 10 * 1024 * 1024);
List <UInt64> sizes = new List <UInt64>(sizeAggregate.Keys);
sizes.Sort();
sizes.Reverse(); //make the bigger ones appear first
string targetFile = Path.Combine(driveInfo.Name, "similarfiles.txt");
using (StreamWriter fs = new StreamWriter(targetFile))
{
foreach (UInt64 size in sizes)
{
List <INode> similarNodes = sizeAggregate[size];
if (similarNodes.Count <= 1)
{
continue;
}
fs.WriteLine("-----------------------------------------");
fs.WriteLine("SIZE: {0}", size);
fs.WriteLine("-----------------------------------------");
foreach (INode node in similarNodes)
{
fs.WriteLine(
string.Format(
"Index {0}, {1}, {2}, size {3}, path {4}",
node.NodeIndex,
(node.Attributes & Attributes.Directory) != 0 ? "Dir" : "File",
node.Name,
node.Size,
node.FullName
)
);
}
}
}
Console.WriteLine("File similarities report has been saved to {0}", targetFile);
}
