Implement autosave

Models/Handler/DbHandler.cs

@@ -73,8 +73,8 @@ public class DbHandler
     
     private const string InsertIntoResume = "PRAGMA synchronous = OFF; PRAGMA temp_store = MEMORY;" +
                                             " PRAGMA journal_mode = MEMORY; PRAGMA foreign_keys = off;" +
-                                            " INSERT INTO Resume (ThreadNumber, StartRange, EndRange, FirstByte, SecondByte, ThirdByte, FourthByte)" +
-                                            " VALUES (@threadNumber, @startRange, @endRange, @firstByte, @secondByte, @thirdByte, @fourthByte);";
+                                            " INSERT INTO Resume (ThreadNumber, StartRange, EndRange, FirstByte, SecondByte, ThirdByte, FourthByte, Paused, Completed)" +
+                                            " VALUES (@threadNumber, @startRange, @endRange, @firstByte, @secondByte, @thirdByte, @fourthByte, @paused, @completed);";
 
     private const string InsertIntoCompressedDbConnectionString = "PRAGMA synchronous = OFF; PRAGMA temp_store = MEMORY;" +
                                                                    " PRAGMA journal_mode = MEMORY; PRAGMA foreign_keys = off;" +
@@ -86,11 +86,13 @@ public class DbHandler
     private const string ReadFilteredIdsStatement = "SELECT Id FROM Filtered WHERE Id != 0 ORDER BY Id DESC LIMIT 1;";
     private const string ReadFilteredIpStatement = "SELECT Ip1, Ip2, Ip3, Ip4 FROM Filtered WHERE Ip1 == @ip1 AND Ip2 == @ip1 AND Ip3 == @ip1 AND Ip4 == @ip1 ORDER BY Ip1 DESC LIMIT 1;";
     private const string ReadDiscardedSeqIdsStatement = "SELECT seq FROM sqlite_sequence;";
-    private const string ReadAndDeleteResumeStatement = "SELECT * FROM Resume WHERE ThreadNumber == @threadNumber; DELETE FROM RESUME WHERE ThreadNumber == @threadNumber;";
+    private const string ReadResumeStatement = "SELECT * FROM Resume WHERE ThreadNumber == @threadNumber;";
     private const string ReadCompressedDbRowsStatement = "SELECT Rows FROM CompressedDatabases;";
     
     private const string UpdateUnfilteredStatement = "PRAGMA synchronous = OFF; PRAGMA temp_store = MEMORY; PRAGMA journal_mode = MEMORY; PRAGMA foreign_keys = off; UPDATE Unfiltered SET Filtered = 1 WHERE Id == @id;";
     
+    private const string UpdateResumeStatement = "UPDATE Resume SET FirstByte = @firstByte, SecondByte = @secondByte, ThirdByte = @thirdByte, FourthByte = @fourthByte, Paused = @paused, Completed = @completed WHERE ThreadNumber = @threadNumber;";
+    
     private const string ReIndexDatabasesStatement = "REINDEX;";
     
     private const string VacuumDatabasesStatement = "VACUUM;";
@@ -256,7 +258,7 @@ public class DbHandler
                 continue;
             }
             
-            if (i >= 500_000 && !_compressing)
+            if (i >= 5_000_000 && !_compressing)
             {
                 _compressing = true;
                 
@@ -457,19 +459,31 @@ public class DbHandler
     {
         using SqliteConnection connection = new(_resumeConnectionString);
         connection.Open();
-        
-        using SqliteCommand command = new(InsertIntoResume, connection);
+        SqliteCommand command;
+
+        if (resumeObject.Operation == Operations.Insert)
+        {
+            command = new(InsertIntoResume, connection);
+            command.Parameters.AddWithValue("@startRange", resumeObject.StartRange);
+            command.Parameters.AddWithValue("@endRange", resumeObject.EndRange);
+        }
+        else
+        {
+            command = new(UpdateResumeStatement, connection);
+        }
         
         command.Parameters.AddWithValue("@threadNumber", resumeObject.ThreadNumber);
-        command.Parameters.AddWithValue("@startRange", resumeObject.StartRange);
-        command.Parameters.AddWithValue("@endRange", resumeObject.EndRange);
         command.Parameters.AddWithValue("@firstByte", resumeObject.FirstByte);
         command.Parameters.AddWithValue("@secondByte", resumeObject.SecondByte);
         command.Parameters.AddWithValue("@thirdByte", resumeObject.ThirdByte);
         command.Parameters.AddWithValue("@fourthByte", resumeObject.FourthByte);
+        command.Parameters.AddWithValue("@paused", resumeObject.Paused);
+        command.Parameters.AddWithValue("@completed", resumeObject.Completed);
         
         _ = command.ExecuteNonQuery();
         connection.Close();
+        
+        command.Dispose();
     }
 
     private void InsertCompressedDatabase(int threadNumber, long rows)
@@ -739,7 +753,7 @@ public class DbHandler
             using SqliteConnection connection = new(_resumeConnectionString);
             connection.Open();
             
-            using SqliteCommand command = new(ReadAndDeleteResumeStatement, connection);
+            using SqliteCommand command = new(ReadResumeStatement, connection);
             command.Parameters.AddWithValue("@threadNumber", threadNumber);
             
             using SqliteDataReader reader = command.ExecuteReader();
@@ -760,6 +774,8 @@ public class DbHandler
                 resumeObject.SecondByte = reader.GetInt32(4);
                 resumeObject.ThirdByte = reader.GetInt32(5);
                 resumeObject.FourthByte = reader.GetInt32(6);
+                resumeObject.Paused = reader.GetBoolean(7);
+                resumeObject.Completed = reader.GetBoolean(8);
             }
             
             return resumeObject;

Models/Model/Backend/ScannerResumeObject.cs

@@ -9,4 +9,7 @@ public class ScannerResumeObject
     public int ThirdByte { get; set; }
     public int FourthByte { get; set; }
     public int ThreadNumber { get; set; }
+    public Operations Operation { get; set; }
+    public bool Paused { get; set; }
+    public bool Completed { get; set; }
 }