basic backup added

added the backup time to config so that users can decide
for how long do they want to keep the data

Next: write tests for the new backup

Author: UrszulaNeuman

dls_barcode/config/barcode_config.py

@@ -44,6 +44,7 @@ def __init__(self, file, file_manager):
 
         self.store_directory = add(DirectoryConfigItem, "Store Directory", default=default_store)
         self.store_capacity = add(IntConfigItem, "Results History Size", default=50)
+        self.backup_time = add(IntConfigItem, "Backup in Weeks", default=3)
 
         self.console_frame = add(BoolConfigItem, "Print Frame Summary", default=False)
         self.slot_images = add(BoolConfigItem, "Save Debug Images", default=False)

dls_barcode/config/barcode_config_dialog.py

@@ -55,6 +55,7 @@ def _init_ui(self):
 
         self.start_group("Store")
         self._add_control(StoreDirectoryConfigControl(cfg.store_directory))
+        add(cfg.backup_time)
         add(cfg.store_capacity)
 
         self.start_group("Debug")

dls_barcode/data_store/backup.py

@@ -9,8 +9,6 @@ class Backup:
     Backup class maintains the short time backaup of records which is kept in the same folder as the store files.
     """
 
-    MAX_BACKUP_TIME = 6   # maximum backup time in weeks
-
     def __init__(self, directory, backup_time):
         self.comms = CommsManager(directory, "backup")
         self.backup_time = backup_time
@@ -31,7 +29,6 @@ def _is_old(self, record):
         tm = time.time()
         record_time = record.timestamp
         delta = tm - record_time
-        backup_time = min(self.backup_time, self.MAX_BACKUP_TIME)
-        weeks = backup_time * 604800  # weeks in seconds
+        weeks = self.backup_time * 604800  # weeks in seconds
         return delta > weeks