rename Decoder

boswatch/decoder/zveiDecoder.py

@@ -0,0 +1,65 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+"""!
+    ____  ____  ______       __      __       __       _____
+   / __ )/ __ \/ ___/ |     / /___ _/ /______/ /_     |__  /
+  / __  / / / /\__ \| | /| / / __ `/ __/ ___/ __ \     /_ <
+ / /_/ / /_/ /___/ /| |/ |/ / /_/ / /_/ /__/ / / /   ___/ /
+/_____/\____//____/ |__/|__/\__,_/\__/\___/_/ /_/   /____/
+                German BOS Information Script
+                     by Bastian Schroll
+
+@file:        zvei.py
+@date:        05.01.2018
+@author:      Bastian Schroll
+@description: Decoder class for zvei
+"""
+
+import logging
+import re
+
+from boswatch.packet import Packet
+
+logging.debug("- %s loaded", __name__)
+
+
+class ZveiDecoder:
+    """!ZVEI decoder class
+
+    This class decodes ZVEI data.
+    First step is to validate the data and _check if the format is correct.
+    After that the double-tone-sign 'E' is replaced.
+    In the last step a valid BOSWatch packet is created and returned"""
+
+    @staticmethod
+    def decode(data):
+        """!Decodes ZVEI
+
+        @param data: ZVEI for decoding
+        @return BOSWatch ZVEI packet or None"""
+        if re.search("[0-9E]{5}", data[7:12]):
+            logging.debug("found valid ZVEI")
+
+            bwPacket = Packet()
+            bwPacket.set("mode", "zvei")
+            bwPacket.set("zvei", ZveiDecoder._solveDoubleTone(data[7:12]))
+
+            logging.debug(bwPacket)
+            return bwPacket
+
+        logging.warning("no valid data")
+        return None
+
+    @staticmethod
+    def _solveDoubleTone(data):
+        """!Remove the doubleTone sign (here its the 'E')
+
+        @param data: ZVEI for double tone sign replacement
+        @return Double Tone replaced ZVEI"""
+        if "E" in data:
+            data_old = data
+            for i in range(1, len(data)):
+                if data[i] == "E":
+                    data = data.replace("E", data[i - 1], 1)
+            logging.debug("solve doubleTone: %s -> %s", data_old, data)
+        return data