fix #647 weather doesnt run forever if offline on start (#700)

* always run init()

added online/offline_interval to settings of base weather class and accompanying logic

* remove `require(internet)` from `init` methods of both weather modules

* ...

i3pystatus/weather/__init__.py

@@ -171,6 +171,8 @@ class Weather(IntervalModule):
                          'shown by the module) when refreshing weather data. '
                          '**NOTE:** Depending on how quickly the update is '
                          'performed, the icon may not be displayed.'),
+        ('online_interval', 'seconds between updates when online (defaults to interval)'),
+        ('offline_interval', 'seconds between updates when offline (default: 300)'),
         'format',
     )
     required = ('backend',)
@@ -191,6 +193,8 @@ class Weather(IntervalModule):
     color = None
     backend = None
     interval = 1800
+    offline_interval = 300
+    online_interval = None
     refresh_icon = '⟳'
     format = '{current_temp}{temp_unit}[ {update_error}]'
 
@@ -205,6 +209,9 @@ class Weather(IntervalModule):
             user_open(self.backend.forecast_url)
 
     def init(self):
+        if self.online_interval is None:
+            self.online_interval = int(self.interval)
+
         if self.backend is None:
             raise RuntimeError('A backend is required')
 
@@ -239,6 +246,10 @@ class Weather(IntervalModule):
         self.thread.start()
 
     def update_thread(self):
+        if internet():
+            self.interval = self.online_interval
+        else:
+            self.interval = self.offline_interval
         try:
             self.check_weather()
             while True:
@@ -253,7 +264,6 @@ class Weather(IntervalModule):
             )
             self.logger.error(msg, exc_info=True)
 
-    @require(internet)
     def check_weather(self):
         '''
         Check the weather using the configured backend

i3pystatus/weather/weathercom.py

@@ -166,7 +166,6 @@ class Weathercom(WeatherBackend):
     # This will be set in the init based on the passed location code
     forecast_url = None
 
-    @require(internet)
     def init(self):
         if self.location_code is not None:
             # Ensure that the location code is a string, in the event that a

i3pystatus/weather/wunderground.py

@@ -107,7 +107,6 @@ class Wunderground(WeatherBackend):
     station_id = None
     forecast_url = None
 
-    @require(internet)
     def init(self):
         '''
         Use the location_code to perform a geolookup and find the closest