From 0bd9684348d9bc9d6a0f95691ad6ce3e4f2f47ef Mon Sep 17 00:00:00 2001
From: Jean-Claude Graf <mail@jeanclaudegraf.ch>
Date: Wed, 22 Apr 2020 19:32:43 +0200
Subject: [PATCH] NEW: Ip change detector

---
 IpManager.py | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 IpManager.py

diff --git a/IpManager.py b/IpManager.py
new file mode 100644
index 0000000..4588aeb
--- /dev/null
+++ b/IpManager.py
@@ -0,0 +1,73 @@
+#!/bin/env python
+
+import requests
+import logging
+import os
+
+logger = logging.getLogger(__file__)
+
+class IpManager():
+    
+    ipFile = None
+
+    def __init__(self, ipFile):
+        logger.debug('Initialozing IpManager')
+
+        self.ipFile = ipFile
+
+    def _getLastIp(self):
+        """
+            Extracts the ip from the ipFile, and creates the file if it does not exist
+        """
+
+        logger.debug('getLastIp called')
+
+        try:
+            with open(self.ipFile, 'r') as f:
+                ip = f.read()
+           
+            logger.info(f'Found ip {ip}')
+            return ip
+
+        except FileNotFoundError:
+            logger.info('IP File not found, creating new one')
+            open(self.ipFile, 'a').close()
+            return None
+
+        except Exception as e:
+            logger.error(f'Error: {str(e)}') 
+            return None
+
+    def _storeNewIp(self, ip):
+        """
+            Stores the ip in the ipFile
+        """
+        logger.debug(f'Store {ip} to file')
+
+        with open(self.ipFile, 'w') as f:
+            f.write(ip)
+
+    
+    def _fetchCurrentIp(self):
+        logger.debug('Fetching current ip')
+        current = requests.get('https://api.ipify.org').text.strip()
+
+        logger.debug(f'current ip is {current}')
+
+        return current
+
+    def hasIpChanged(self):
+        """
+            Checks if the ip has changed and returns it if so, else return False
+        """
+
+        last = self._getLastIp()
+        current = self._fetchCurrentIp()
+
+        if last is None or last != current:
+            logger.debug(f'Ip has changed from {last} to {current}')
+            self._storeNewIp(current)
+
+            return current
+
+        return None