feat: add rollback button

src/recorder.py

@@ -9,7 +9,7 @@ from PyQt6.QtCore import QObject, QThread, QTimer, pyqtSignal, pyqtSlot
 from PyQt6.QtGui import QKeyEvent
 from PyQt6.QtWidgets import QMainWindow
 
-from src.command import CarControl, Command, ControlCommand, RecordingCommand
+from src.command import ApplySnapshotCommand, CarControl, Command, ControlCommand, RecordingCommand, ResetCommand
 from src.record_file import RecordFile
 from src.recorder_ui import Ui_Recorder
 from src.snapshot import Snapshot
@@ -203,7 +203,19 @@ class RecorderWindow(Ui_Recorder, QMainWindow):
         self.send_command(RecordingCommand(self.recording))
 
     def rollback(self):
-        pass
+        rollback_by: int = self.forgetSnapshotNumber.value()
+        rollback_by = max(0, min(rollback_by, len(self.snapshots) - 1))
+
+        self.snapshots = self.snapshots[:-rollback_by]
+        self.nbrSnapshotSaved.setText(str(len(self.snapshots)))
+
+        if len(self.snapshots) == 0:
+            self.send_command(ResetCommand())
+        else:
+            self.send_command(ApplySnapshotCommand(self.snapshots[-1]))
+
+        if self.recording:
+            self.toggle_record()
 
     def toggle_autopilot(self):
         self.autopiloting = not self.autopiloting