Add QTimer to ensure background jobs are scheduled correctly. (#780)

* Add QTimer to ensure background jobs are scheduled correctly.
* Exclude from App Nap to keep timer enabled.
* Remove notifications for schedule changes, since we do it very often now.

package/vorta.spec

@@ -68,6 +68,7 @@ app = BUNDLE(coll,
                  'CFBundleDisplayName': APP_NAME,
                  'CFBundleIdentifier': APP_ID_DARWIN,
                  'NSHighResolutionCapable': 'True',
+                 'LSAppNapIsDisabled': 'True',
                  'NSRequiresAquaSystemAppearance': 'False',
                  'LSUIElement': '1',
                  'LSMinimumSystemVersion': '10.14',

setup.cfg

@@ -42,7 +42,7 @@ install_requires =
   pyqt5
   peewee
   python-dateutil
-  apscheduler
+  apscheduler < 4.0
   psutil
   setuptools
   secretstorage; sys_platform != 'darwin'

src/vorta/scheduler.py

@@ -1,6 +1,7 @@
 import logging
 from datetime import date, timedelta
 
+from PyQt5 import QtCore
 from apscheduler.schedulers.qt import QtScheduler
 from apscheduler.triggers import cron
 from vorta.borg.check import BorgCheckThread
@@ -15,6 +16,7 @@
 logger = logging.getLogger(__name__)
 
 
+# TODO: refactor to use QtCore.QTimer directly
 class VortaScheduler(QtScheduler):
     def __init__(self, parent):
         super().__init__()
@@ -22,6 +24,12 @@ def __init__(self, parent):
         self.start()
         self.reload()
 
+        # Set timer to make sure background tasks are scheduled
+        self.qt_timer = QtCore.QTimer()
+        self.qt_timer.timeout.connect(self.reload)
+        self.qt_timer.setInterval(45 * 60 * 1000)
+        self.qt_timer.start()
+
     def tr(self, *args, **kwargs):
         scope = self.__class__.__name__
         return translate(scope, *args, **kwargs)
@@ -51,8 +59,6 @@ def reload(self):
                                            minute=profile.schedule_fixed_minute)
             if self.get_job(job_id) is not None and trigger is not None:
                 self.reschedule_job(job_id, trigger=trigger)
-                notifier = VortaNotifications.pick()
-                notifier.deliver(self.tr('Vorta Scheduler'), self.tr('Background scheduler was changed.'))
                 logger.debug('Job for profile %s was rescheduled.', profile.name)
             elif trigger is not None:
                 self.add_job(