issue126-backup (#198)

reworked autosave, closes #126; update with restart

bin/evaluate.py

@@ -2,6 +2,7 @@
 
 import sys
 import pathlib
+import os
 sys.path.append(str(pathlib.Path(__file__).absolute().parent.parent / 'src'))
 
 from nmreval.configs import check_for_config
@@ -16,12 +17,45 @@ from nmreval.lib.logger import handle_exception
 sys.excepthook = handle_exception
 
 from gui_qt import App
+from gui_qt.Qt import QtCore
 
-app = App(['Team Rocket FTW!'])
+app = App(['NMReval'])
 
 from gui_qt.main.mainwindow import NMRMainWindow
+from gui_qt.lib.backup import BackupManager
+
+
+def do_autosave():
+    # autosave and update timestamp in db
+    success = mplQt.autosave()
+    if success:
+        backuping.update_last_save()
+
+# autosave stuff: keep track of instance and their backup files
+backuping = BackupManager()
+
+# look for autosaves in DB without running programs
+files = backuping.search_unsaved()
+
+# tell everyone what autosave files belongs to this process
+pid = os.getpid()
+bck_name = backuping.create_entry(pid)
+mplQt = NMRMainWindow(bck_file=bck_name)
+
+# one manual autosave to create the file
+do_autosave()
+
+# load all selected autosaves to program
+for f in files:
+    mplQt.management.load_files(f)
+    f.unlink()
+
+timer = QtCore.QTimer()
+timer.timeout.connect(do_autosave)
+timer.start(3 * 60 * 1000)
+
+app.aboutToQuit.connect(backuping.close)
 
-mplQt = NMRMainWindow()
 mplQt.show()
 
 sys.exit(app.exec())