Move extractable file types to new library

BinaryObjectScanner.FileType/InstallShieldCAB.cs

@@ -0,0 +1,87 @@
+using System;
+using System.IO;
+using System.Text.RegularExpressions;
+using BinaryObjectScanner.Interfaces;
+using UnshieldSharp.Cabinet;
+
+namespace BinaryObjectScanner.FileType
+{
+    /// <summary>
+    /// InstallShield cabinet file
+    /// </summary>
+    public class InstallShieldCAB : IExtractable
+    {
+        /// <inheritdoc/>
+        public string Extract(string file, bool includeDebug)
+        {
+            if (!File.Exists(file))
+                return null;
+
+            using (var fs = File.Open(file, FileMode.Open, FileAccess.Read, FileShare.Read))
+            {
+                return Extract(fs, file, includeDebug);
+            }
+        }
+
+        /// <inheritdoc/>
+        public string Extract(Stream stream, string file, bool includeDebug)
+        {
+            // Get the name of the first cabinet file or header
+            string directory = Path.GetDirectoryName(file);
+            string noExtension = Path.GetFileNameWithoutExtension(file);
+            string filenamePattern = Path.Combine(directory, noExtension);
+            filenamePattern = new Regex(@"\d+$").Replace(filenamePattern, string.Empty);
+
+            bool cabinetHeaderExists = File.Exists(Path.Combine(directory, filenamePattern + "1.hdr"));
+            bool shouldScanCabinet = cabinetHeaderExists
+                ? file.Equals(Path.Combine(directory, filenamePattern + "1.hdr"), StringComparison.OrdinalIgnoreCase)
+                : file.Equals(Path.Combine(directory, filenamePattern + "1.cab"), StringComparison.OrdinalIgnoreCase);
+
+            // If we have anything but the first file
+            if (!shouldScanCabinet)
+                return null;
+
+            try
+            {
+                // Create a temp output directory
+                string tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+                Directory.CreateDirectory(tempPath);
+
+                InstallShieldCabinet cabfile = InstallShieldCabinet.Open(file);
+                for (int i = 0; i < cabfile.FileCount; i++)
+                {
+                    try
+                    {
+                        // Check if the file is valid first
+                        if (!cabfile.FileIsValid(i))
+                            continue;
+
+                        string tempFile;
+                        try
+                        {
+                            string filename = cabfile.FileName(i);
+                            tempFile = Path.Combine(tempPath, filename);
+                        }
+                        catch
+                        {
+                            tempFile = Path.Combine(tempPath, $"BAD_FILENAME{i}");
+                        }
+
+                        cabfile.FileSave(i, tempFile);
+                    }
+                    catch (Exception ex)
+                    {
+                        if (includeDebug) Console.WriteLine(ex);
+                    }
+                }
+
+                return tempPath;
+            }
+            catch (Exception ex)
+            {
+                if (includeDebug) Console.WriteLine(ex);
+                return null;
+            }
+        }
+    }
+}