Add option to check for deleted files

README.md

@@ -39,19 +39,8 @@ Go to the publish folder
 cd src/Chksum/bin/Release/net7.0/linux-x64/publish
 ```
 
-Copy the libe_sqlite3.so to your /usr/local/lib or /usr/lib
-```bash
-cp libe_sqlite3.so /usr/local/lib
-```
-
 Run executable
 
 ```bash
-LD_LIBRARY_PATH=/usr/local/lib ./Chksum
-```
-
-Info
-
-LD_LIBRARY_PATH=/usr/local/lib is needed to tell the executable where the library is located
-
-Alternately you can put the libe_sqlite3.so into the same folder as the executable
+./Chksum
+```

src/Chksum/Program.cs

@@ -39,6 +39,10 @@ public class Program {
             case "createDB":
                 utils.initializeDB();
                 break;
+            case "checkIfFileWasDeleted":
+                Console.ResetColor();
+                utils.checkIfFileWasDeleted();
+                break;
             case "help":
                 PrintAvailableOptions();
                 break;
@@ -57,6 +61,7 @@ public class Program {
             "checksum",
             "compareChecksums",
             "createDB",
+            "checkIfFileWasDeleted",
             "help"
         };
 

src/Chksum/chksum.cs

@@ -84,7 +84,7 @@ public class ChksumUtils {
                     string pathToFile = Path.GetRelativePath(DatabaseRoot, absolutePathToFile);
                     string fileHash = CalculateMD5(fileName);
 
-                    if (checkIfFileMovedAndUpdatePathToFile(fileHash, fileName, pathToFile) == false && checkIfFileAlreadyExists(fileHash, fileName) == false) {
+                    if (checkIfFileMovedAndUpdatePathToFile(fileHash, fileName, pathToFile) == false && checkIfFileAlreadyExistsInDatabase(fileHash, fileName) == false) {
                         connection.Open();
 
                         var command = connection.CreateCommand();
@@ -104,12 +104,12 @@ public class ChksumUtils {
         }
     }
 
-    private bool checkIfFileAlreadyExists(string fileHash, string pathToFile) {
+    private bool checkIfFileAlreadyExistsInDatabase(string fileHash, string pathToFile) {
         string filehash = string.Empty;
         string pathtofile = string.Empty;
         bool doesExist = false;
 
-        using (var connection = new SqliteConnection("Data Source=" + DatabaseRoot + "chksum.db;Mode=ReadWrite")) {
+        using (var connection = new SqliteConnection("Data Source=" + DatabaseRoot + "chksum.db;Mode=ReadOnly")) {
             connection.Open();
 
             var command = connection.CreateCommand();
@@ -128,9 +128,6 @@ public class ChksumUtils {
         }
 
         if (fileHash == filehash) {
-            Console.WriteLine("Duplicate files found:");
-            Console.WriteLine($"\toriginal\t{pathToFile}");
-            Console.WriteLine($"\tduplicate\t{pathtofile}\n");
             doesExist = true;
         }
         return doesExist;
@@ -177,7 +174,41 @@ public class ChksumUtils {
         }
     }
 
-    public void compareChecksums() {
+    public void checkIfFileWasDeleted() {
+        string pathToFile = string.Empty;
+
+        using (var connection = new SqliteConnection("Data Source=" + DatabaseRoot + "chksum.db;Mode=ReadWrite")) {
+            connection.Open();
+
+            var selectCommand = connection.CreateCommand();
+            selectCommand.CommandText =
+            @"
+                Select pathtofile FROM file
+            ";
+
+            using (var reader = selectCommand.ExecuteReader()) {
+                while (reader.Read()) {
+                    pathToFile = reader.GetString(0);
+                    
+                    if (!File.Exists(pathToFile)) {
+                        var deleteCommand = connection.CreateCommand();
+                        deleteCommand.CommandText =
+                        @"
+                            DELETE FROM file
+                            WHERE pathtofile = $pathtofile
+                        ";
+                        deleteCommand.Parameters.AddWithValue("$pathtofile", pathToFile);
+                        deleteCommand.ExecuteNonQuery();
+
+                        Console.WriteLine("File deleted:");
+                        Console.WriteLine($"\t{pathToFile}\n");
+                    }
+                }
+            }
+        }
+    }
+
+    public void compareChecksums() { // reuse for database comparison
         foreach (var directory in Directory.GetDirectories(Directory.GetCurrentDirectory())) {
             Directory.SetCurrentDirectory(directory); // Set new root
             if (getFileCount() >= 1) {