Added a lot of checks for cfg file

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@2002 b32b6428-25c9-4566-ad07-03861ab6144f

devices/weather/OpenWeatherMap/xaal/owm/gw.py

 import platform
 import time
+import atexit
+import sys
 
 import pyowm
 from pyowm.exceptions import OWMError
@@ -10,6 +12,7 @@ PACKAGE_NAME = "xaal.owm"
 logger = tools.get_logger(PACKAGE_NAME,'DEBUG')
 
 RATE = 300 # update every 5 min
+API_KEY = '3a5989bac31472cd41d69e92838bd454'
 
 def setup_dev(dev):
     dev.vendor_id  = "IHSEV"
@@ -22,21 +25,34 @@ def setup_dev(dev):
 class GW:
     def __init__(self,engine):
         self.eng = engine
-        self.cfg = tools.load_cfg_or_die(PACKAGE_NAME)
+        atexit.register(self._exit)
+        cfg = tools.load_cfg(PACKAGE_NAME)
+        if cfg == None:
+            logger.info('New  config file')
+            cfg = tools.new_cfg(PACKAGE_NAME)
+            cfg.write()
+        if not cfg.get('config',None): cfg['config'] = {}
+        self.cfg = cfg
         self.setup()
 
-    def setup(self):
-        """ create devices, register .."""
+    def get_config_addr(self,key):
+        """ return a new xaal address and flag an update"""
         cfg = self.cfg['config']
+        if cfg.get(key,None) == None:
+            cfg[key] = tools.get_random_uuid()
+            logger.info("New device addr : %s = %s" % (key,cfg[key]))
+        return cfg[key]
 
+    def setup(self):
+        """ create devices, register .."""
         # devices
         self.devs = [] 
-        self.devs.append(devices.thermometer(cfg['temperature']))
-        self.devs.append(devices.hygrometer(cfg['humidity']))
-        self.devs.append(devices.barometer(cfg['pressure']))
-        self.devs.append(devices.windgauge(cfg['wind']))
+        self.devs.append(devices.thermometer(self.get_config_addr('temperature')))
+        self.devs.append(devices.hygrometer(self.get_config_addr('humidity')))
+        self.devs.append(devices.barometer(self.get_config_addr('pressure')))
+        self.devs.append(devices.windgauge(self.get_config_addr('wind')))
         # gw 
-        gw = devices.gateway(cfg['addr'])
+        gw = devices.gateway(self.get_config_addr('addr'))
         gw.attributes['embedded'] = [dev.address for dev in self.devs]
 
         for dev in (self.devs + [gw,]):
@@ -45,7 +61,16 @@ class GW:
         self.eng.add_devices(self.devs + [gw,])
         # OWM stuff
         self.eng.add_timer(self.update,RATE)
-        self.owm = pyowm.OWM(cfg['api_key'])
+        # API Key
+        api_key = self.cfg['config'].get('api_key',None)
+        if not api_key:
+            self.cfg['config']['api_key'] = api_key = API_KEY
+        # Place 
+        self.place = self.cfg['config'].get('place',None)
+        if not self.place:
+            self.cfg['config']['place'] = self.place = 'Brest,FR'
+        # We are ready
+        self.owm = pyowm.OWM(api_key)
 
     def update(self):
         try:
@@ -54,8 +79,7 @@ class GW:
             logger.warn(e)
 
     def _update(self):
-        place = self.cfg['config']['place']
-        weather = self.owm.weather_at_place(place).get_weather()
+        weather = self.owm.weather_at_place(self.place).get_weather()
         self.devs[0].attributes['temperature'] = round(weather.get_temperature(unit='celsius').get('temp',None),1)
         self.devs[1].attributes['humidity']    = weather.get_humidity()
         self.devs[2].attributes['pressure']    = weather.get_pressure().get('press',None)
@@ -64,6 +88,14 @@ class GW:
         self.devs[3].attributes['windStrength'] = wind
         self.devs[3].attributes['windAngle'] = weather.get_wind().get('deg',None)
 
+    def _exit(self):
+        cfg = tools.load_cfg(PACKAGE_NAME)
+        if cfg != self.cfg:
+            logger.info('Saving configuration file')
+            self.cfg.write()
+
+
+
 def init(engine):
     gw = GW(engine)
     return gw