more work

src/gui_qt/lib/backup.py

@@ -39,20 +39,28 @@ class BackupManager(QtCore.QObject):
             pid = self._pid
 
         con = sqlite3.connect(DB_FILE)
-        cursor = con.execute('DELETE FROM sessions WHERE pid = ?;', (pid,))
+        cursor = con.cursor()
+
+        res = cursor.execute('DELETE FROM sessions WHERE pid = ?;', (pid,))
+        con.commit()
+
+        self.delete_db_if_empty()
+
+    def delete_db_if_empty(self):
+        con = sqlite3.connect(DB_FILE)
+        cursor = con.cursor()
         res = cursor.execute('SELECT COUNT(sessions.pid) FROM sessions GROUP BY sessions.pid;')
         con.commit()
+
         remaining_processes = res.fetchone()
         con.close()
 
         if remaining_processes is None:
-            self.delete_db()
-
-    def delete_db(self):
-        Path(DB_FILE).unlink()
+            Path(DB_FILE).unlink()
 
     def close(self):
         self.remove_entry()
+        self.delete_db_if_empty()
 
     def search_unsaved(self):
         con = sqlite3.connect(DB_FILE)
@@ -70,7 +78,9 @@ class BackupManager(QtCore.QObject):
             except ProcessLookupError:
                 missing_processes.append((pid, fname))
 
-        return missing_processes
+        if missing_processes:
+            msg = QtWidgets.QMessageBox()
+            msg.exec()
 
     def update_last_save(self):
         con = sqlite3.connect(DB_FILE)