add decoders and tests

boswatch/decoder/fms.py

@@ -0,0 +1,74 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+"""!
+    ____  ____  ______       __      __       __       _____
+   / __ )/ __ \/ ___/ |     / /___ _/ /______/ /_     |__  /
+  / __  / / / /\__ \| | /| / / __ `/ __/ ___/ __ \     /_ <
+ / /_/ / /_/ /___/ /| |/ |/ / /_/ / /_/ /__/ / / /   ___/ /
+/_____/\____//____/ |__/|__/\__,_/\__/\___/_/ /_/   /____/
+                German BOS Information Script
+                     by Bastian Schroll
+
+@file:        fms.py
+@date:        06.01.2018
+@author:      Bastian Schroll
+@description: Decoder class for fms
+"""
+
+import logging
+import re
+
+from boswatch.packet import packet
+
+logging.debug("- %s loaded", __name__)
+
+
+class Fms:
+    """!FMS decoder class
+
+    This class decodes FMS data.
+    First step is to validate the data and check if the format is correct.
+    In the last step a valid BOSWatch packet is created and returned"""
+
+    def __init__(self):
+        """!Create a new instance"""
+        logging.debug("FMS decoder started")
+
+    def decode(self, data):
+        """!Decodes FMS
+
+        @param data: FMS for decoding
+        @return BOSWatch FMS packet or None"""
+        if "CRC correct" in data:
+            service = data[19]
+            country = data[36]
+            location = data[61:63]
+            vehicle = data[72:76]
+            status = data[84]
+            direction = data[101]
+            directionText = data[103:110]
+            tacticalInfo = data[114:117]
+            fms_id = service + country + location + vehicle + status + direction
+
+            if re.search("[0-9a-f]{8}[0-9a-f]{1}[01]{1}", fms_id):
+                logging.debug("found valid FMS")
+
+                bwPacket = packet.Packet()
+                bwPacket.setField("mode", "fms")
+                bwPacket.setField("fms", fms_id)
+                bwPacket.setField("service", service)
+                bwPacket.setField("country", country)
+                bwPacket.setField("location", location)
+                bwPacket.setField("vehicle", vehicle)
+                bwPacket.setField("status", status)
+                bwPacket.setField("direction", direction)
+                bwPacket.setField("cirectionText", directionText)
+                bwPacket.setField("tacticalInfo", tacticalInfo)
+
+                logging.debug(bwPacket)
+                return bwPacket
+
+            logging.warning("no valid data")
+            return None
+        logging.warning("CRC Error")
+        return None