introduce a wrapper to provide a system class that manages the environment

aman/System.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+
+import glob
+import os
+import sys
+
+from aman.com.Euroscope import Euroscope
+from aman.config.AircraftPerformance import AircraftPerformance
+from aman.config.Airport import Airport
+import aman.config.System
+
+class System:
+    def findConfigPath():
+        envvar = os.environ.get('AMAN_CONFIG_PATH')
+        if None == envvar:
+            print('No AMAN_CONFIG_PATH in environment variables found. Using execution directory.')
+            path = os.getcwd()
+        else:
+            print('AMAN_CONFIG_PATH found.')
+            path = envvar
+
+        print('Config-path: ' + path)
+        return path
+
+    def __init__(self):
+        # default initialization of members
+        self.systemConfig = None
+        self.aircraftPerformance = None
+        self.receiver = None
+
+        configPath = System.findConfigPath()
+
+        # read all system relevant configuration files
+        self.systemConfig = aman.config.System.System(os.path.join(configPath, 'System.ini'))
+        print('Parsed System.ini')
+
+        # read the aircraft performance data
+        self.aircraftPerformance = AircraftPerformance(os.path.join(configPath, 'PerformanceData.ini'))
+        if None == self.aircraftPerformance:
+            sys.stderr.write('No aircraft performance data found!')
+            sys.exit(-1)
+        else:
+            print('Parsed PerformanceData.ini. Extracted ' + str(len(self.aircraftPerformance.aircrafts)) + ' aircrafts')
+
+        # find the airport configurations and create the workers
+        airportsPath = os.path.join(os.path.join(configPath, 'airports'), '*.ini')
+        for file in glob.glob(airportsPath):
+            icao = os.path.splitext(os.path.basename(file))[0]
+
+            print('Parsing planner configuration for ' + icao)
+            airportConfig = Airport(file, icao)
+
+        # create the EuroScope receiver
+        self.receiver = Euroscope(configPath, self.systemConfig.Server)
+
+    def __del__(self):
+        if None != self.receiver:
+            del self.receiver
+        self.receiver = None