fix: Added reverse to intent compare and some more explanations

examples/intent.py

@@ -78,9 +78,15 @@
     """
     print()
 
-    compare = ipf.intent.compare_snapshot('$lastLocked')
+    compare = ipf.intent.compare_snapshot('$lastLocked', reverse=False)
     print(tabulate(compare, headers="keys"))
     """
+    Current: The snapshot loaded into the intent class:
+        ipf.intent.load_intent('$last')
+    Other: The snapshot in the comparison:
+        ipf.intent.compare_snapshot('$prev', reverse=True)
+    Reverse (Default: False): Will flip current and other.  Use when class is newest date and compare is an older date.
+    
     name                                                  id  check      current    other    diff
     --------------------------------------------  ----------  -------  ---------  -------  ------
     CDP/LLDP unidirectional                        320633253  total           21       25       4

ipfabric/intent.py

@@ -86,12 +86,12 @@ def get_results(self, intent: IntentCheck, color: Union[str, int], snapshot_id:
         return self.client.fetch_all(intent.api_endpoint, snapshot_id=snapshot_id, reports=intent.web_endpoint,
                                      filters={intent.column: ['color', 'eq', color]})
 
-    def compare_snapshot(self, snapshot_id: str = None):
+    def compare_snapshot(self, snapshot_id: str = None, reverse: bool = False):
         new_intents = {i.name: i for i in self.get_intent_checks(snapshot_id)}
         comparison = list()
         for name, intent in new_intents.items():
             old = self.intent_by_name[name].result
-            compare = old.compare(intent.result)
+            compare = intent.result.compare(old) if reverse else old.compare(intent.result)
             for desc, value in compare.items():
                 n = desc if desc != 'count' else 'total'
                 comparison.append({"name": name, "id": intent.intent_id, "check": n, **value})