Streamline code

src/Chksum/chksum.cs

@@ -1,11 +1,19 @@
 using System.Reflection;
+using System.Security.Cryptography;
 using Microsoft.Data.Sqlite;
 namespace Chksum.Utils;
 public class ChksumUtils {
 
-    private int getFileCount() {
-        int fileCount = Directory.GetFiles(Directory.GetCurrentDirectory()).Length; // Get file count in current directory
-        return fileCount;
+    private int getTotalFileCount() {
+        int totalFileCount = Directory.GetFiles(Directory.GetCurrentDirectory(), "*", SearchOption.AllDirectories).Length;
+        return totalFileCount - 3; // Remove the program, datbase and library from the totalFileCount
+    }
+
+    private string[] indexFiles() {
+        string[] indexedFiles = Directory.GetFiles(Directory.GetCurrentDirectory(), "*", SearchOption.AllDirectories);
+        string[] filesToExclude = { "Chksum", "chksum.db", "libe_sqlite3.so" };
+        indexedFiles = indexedFiles.Where(file => !filesToExclude.Contains(Path.GetFileName(file))).ToArray();
+        return indexedFiles;
     }
 
     public string DatabaseRoot { get; set; } = string.Empty;
@@ -62,28 +70,35 @@ public class ChksumUtils {
         }
     }
 
-    private string CalculateMD5(string filename) {
-        using (var md5 = System.Security.Cryptography.MD5.Create()) {
-            using (var stream = File.OpenRead(filename)) {
-                var hash = md5.ComputeHash(stream);
-                return BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
+    private Dictionary<string, string> CalculateChecksums(string[] filenames) {
+        Dictionary<string, string> checksums = new Dictionary<string, string>();
+
+        Parallel.ForEach(filenames, (filename, state) => {
+            using (var md5 = MD5.Create()) {
+                using (var stream = File.OpenRead(filename)) {
+                    var hash = md5.ComputeHash(stream);
+                    var checksum = BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
+
+                    lock (checksums) {
+                        checksums.Add(filename, checksum);
+                    }
+                }
             }
-        }
+        });
+
+        return checksums;
     }
 
     public void doTheThing() {
-        foreach (var directory in Directory.GetDirectories(Directory.GetCurrentDirectory())) 
         using (var connection = new SqliteConnection("Data Source=" + DatabaseRoot + "chksum.db;Mode=ReadWrite")) {
-            Directory.SetCurrentDirectory(directory); // Set new root
-            if (getFileCount() >= 1) {
-                DirectoryInfo dir = new DirectoryInfo(Directory.GetCurrentDirectory());
-                FileInfo[] files = dir.GetFiles();
-                foreach (FileInfo file in files) {
-                    string fileName = file.Name;
-                    string absolutePathToFile = Path.GetFullPath(fileName);
+            if (getTotalFileCount() >= 1) {
+                Dictionary<string, string> fileHashes = CalculateChecksums(indexFiles());
+                foreach (var file in fileHashes) {
+                    string absolutePathToFile = file.Key;
+                    string fileName = Path.GetFileName(absolutePathToFile);
                     string pathToFile = Path.GetRelativePath(DatabaseRoot, absolutePathToFile);
-                    string fileHash = CalculateMD5(fileName);
-
+                    string fileHash = file.Value;
+                    
                     if (checkIfFileMovedAndUpdatePathToFile(fileHash, fileName, pathToFile) == false && checkIfFileAlreadyExistsInDatabase(fileHash, fileName) == false) {
                         connection.Open();
 
@@ -100,7 +115,6 @@ public class ChksumUtils {
                     }
                 }
             }
-            doTheThing();
         }
     }