initial commit 1.0

README.md

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+# torrentwiper
+Clean up torrent folder from extra files not contained within the torrent
+
+![screenshot](https://setsumi.github.io/torrentwiper/torrentwiper-v1.0.png)

torrentwiper/Form1.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+using System.IO;
+
+using BencodeNET;
+using BencodeNET.Objects;
+
+namespace torrentwiper
+{
+    public partial class Form1 : Form
+    {
+        static readonly string[] SizeSuffixes = { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
+
+        int fileNum = 0;
+        Dictionary<string, Int64> fileList = new Dictionary<string, Int64>();
+        string torrentFolder = "";
+        string torrentName = "";
+        Int64 torrentSize = 0;
+        Int64 deleteSize = 0;
+
+        public Form1()
+        {
+            InitializeComponent();
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            OpenFileDialog dialog = new OpenFileDialog();
+            dialog.Title = "Open Torrent File";
+            dialog.Filter = "Torrent files (*.torrent)|*.torrent";
+            if (dialog.ShowDialog() != DialogResult.OK) return;
+
+            torrentName = dialog.FileName;
+            torrentSize = 0;
+            fileList.Clear();
+
+            listBoxInfo.Items.Clear();
+            textBox1.Text = torrentName;
+
+            TorrentFile torrent = Bencode.DecodeTorrentFile(torrentName);
+
+            add_info(torrent.Info["name"].ToString());
+            if(torrent.Info["source"] != null)
+                add_info(torrent.Info["source"].ToString());
+            add_info(torrent.Comment);
+            add_info(torrent.CreatedBy);
+            add_info(torrent.CreationDate);
+
+            fileNum = 0;
+            BList files = (BList)torrent.Info["files"];
+            foreach (BDictionary file in files)
+            {
+                //add_info(file["length"].ToString());
+
+                BList path = (BList)file["path"];
+                string spath = "";
+                foreach (BString elem in path)
+                {
+                    spath += "\\" + elem;
+                }
+                fileNum++;
+                Int64 sz = Int64.Parse(file["length"].ToString());
+                torrentSize += sz;
+                fileList.Add(spath, sz);
+            }
+            add_info(fileNum.ToString() + " file(s), " + FormatSize(torrentSize));
+        }
+
+        private void button2_Click(object sender, EventArgs e)
+        {
+            if (fileNum == 0) return; // .torrent is not loaded
+
+            using (var fbd = new FolderBrowserDialog())
+            {
+                fbd.SelectedPath = torrentFolder;
+                DialogResult result = fbd.ShowDialog();
+                if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
+                {
+                    torrentFolder = fbd.SelectedPath;
+                    deleteSize = 0;
+
+                    textBox2.Text = torrentFolder;
+                    listBoxFiles.Items.Clear();
+
+                    string[] filenames = Directory.GetFiles(torrentFolder, "*", SearchOption.AllDirectories);
+                    foreach (string file in filenames)
+                    {
+                        try
+                        {
+                            Int64 dummy = fileList[file.Substring(torrentFolder.Length)];
+                        }
+                        catch (KeyNotFoundException)
+                        {
+                            add_file(file);
+                            FileInfo fi = new FileInfo(file);
+                            deleteSize += fi.Length;
+                        }
+                    }
+                    textBox3.Text = listBoxFiles.Items.Count.ToString() + " junk file(s) found, " + FormatSize(deleteSize);
+                }
+            }
+        }
+
+        private void button3_Click(object sender, EventArgs e)
+        {
+            if (fileNum > 0 && listBoxFiles.Items.Count > 0)
+            {
+                DialogResult result = MessageBox.Show("Please confirm files removal", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2);
+                if (result == DialogResult.Yes)
+                {
+                    foreach (string file in listBoxFiles.Items)
+                    {
+                        File.Delete(file);
+                    }
+                    listBoxFiles.Items.Clear();
+                    textBox3.Text = "Junk file(s) removed";
+                }
+            }
+        }
+
+        static string FormatSize(Int64 value, int decimalPlaces = 1)
+        {
+            if (value < 0) { return "-" + FormatSize(-value); }
+
+            int i = 0;
+            decimal dValue = (decimal)value;
+            while (Math.Round(dValue, decimalPlaces) >= 1000)
+            {
+                dValue /= 1024;
+                i++;
+            }
+
+            return string.Format("{0:n" + decimalPlaces + "} {1}", dValue, SizeSuffixes[i]);
+        }
+        private void add_info(string str)
+        {
+            if (str != null) listBoxInfo.Items.Add(str);
+        }
+        private void add_info(DateTime dt)
+        {
+            if (dt != null && dt != default(DateTime)) listBoxInfo.Items.Add(dt.ToString());
+        }
+        private void add_file(string str)
+        {
+            if (str != null) listBoxFiles.Items.Add(str);
+        }
+    }
+}