Add excpetion handling and fix actions palcement in schema

teamswebhook.py

@@ -1,13 +1,12 @@
 #!/usr/bin/env python
 
-import json, os, httplib, urllib, ssl, copy
+import json, httplib, urllib, ssl, copy
 
 # import stock icons
 try:
     stock_icons = json.loads(open('icons.json','r').read())
 except:
-    print('Unable to load icon file')
-    os._exit(1)
+    raise Exception('Unable to load icon file')
 
 # The Actual class
 class MessageCard:
@@ -18,7 +17,6 @@ class MessageCard:
         '@context': 'http://schema.org/extensions',
         'summary': '',
         'sections': [],
-        'potentialAction': []
     }
 
     action_button_template = {
@@ -41,8 +39,7 @@ class MessageCard:
         try:
             self.SetupTLS(tls_verify_host,tls_verify_mode)
         except:
-            print('Unable to setup TLS/SSL Context')
-            os._exit(1)
+            raise Exception('Unable to setup TLS/SSL Context')
 
     def SetupTLS(self,tls_verify_host,tls_verify_mode):
         self.tls_ctx = ssl.create_default_context()
@@ -54,11 +51,13 @@ class MessageCard:
         if isinstance(data_array,dict):
             for key, value in data_array.items():
                 self.facts.append({'name': key, 'value': value})
-        if isinstance(data_array,list):
+        elif isinstance(data_array,list):
             for fact in data_array:
                 if isinstance(fact,dict):
                     for key, value in fact.items():
                         self.facts.append({'name': key, 'value': value})
+        else:
+            raise Exception('No data provided for facts')
 
     def AddButton(self, action_array):
         " Add a button, expects a dict with action_name, button_label and post_uri "
@@ -79,10 +78,7 @@ class MessageCard:
                 raise Exception('post_uri not present')
             self.actions.append(thisAction)
         else:
-            self.error = 'No data provided for action'
-            return False
-
-
+            raise Exception('No data provided for action')
 
     def GenerateCard(self):
         " Generate the JSON for the card "
@@ -92,7 +88,7 @@ class MessageCard:
         self.card['sections'][0]['activitySubtitle'] = self.subtitle
         self.card['sections'][0]['activityImage'] = self.icon
         self.card['sections'][0]['facts'] = self.facts
-        self.card['sections'][0]['potentialAction'] = self.actions
+        self.card['potentialAction'] = self.actions
         self.card['sections'][0]['markdown'] = 'true'
         self.card['summary'] = self.title
 
@@ -101,8 +97,7 @@ class MessageCard:
         self.GenerateCard()
         uri = self.channel_uri.split('/')
         if not len(uri) == 8:
-            self.error = 'Invalid Channel URI'
-            return False
+            raise Exception('Invalid Channel URI')
         endpoint = uri[2]
         del uri[2], uri[1], uri[0]
         uri = '/' + str('/'.join(uri))
@@ -110,13 +105,11 @@ class MessageCard:
         try:
             hookconnection = httplib.HTTPSConnection(endpoint, context=self.tls_ctx)
         except:
-            self.error = 'Unable to open connection'
-            return False
+            raise Exception('Unable to open connection')
         hookconnection.request('POST',uri,json.dumps(self.card))
         self.response = hookconnection.getresponse()
         #print(self.response.read())
 
-
     def PrintJSON(self):
         " Print the JSON of the card "
         self.GenerateCard()