ecn-robots: added Rule class to phba.py

phba.py

@@ -32,3 +32,38 @@ connection_type_equiv = {
     u'hostnossl' : (u'host', u'hostnossl',),
 }
 
+class Rule(object):
+    """
+    A single HBA rule.
+     (?# CONNECTION_TYPE DATABASES USERS CIDR-ADDRESS? METHOD OPTION?)
+    """
+    def __init__(self,
+        ctype, method, users, databases,
+        cidr = None, options = None, comment = None,
+        ):
+        if ctype is not None and ctype not in connection_types:
+            raise ValueError("unknown connection type, '%s'" %(ctype,))
+        if ctype == 'local':
+            if cidr is not None:
+                raise ValueError("cidr must be None for local rules")
+            self.cidr = None
+        else:
+            self.cidr = cidr
+
+        self.ctype = ctype
+
+        if u'all' in users:
+            self.users = (u'all',)
+        else:
+            self.users = users
+
+        if u'all' in databases:
+            self.databases = (u'all',)
+        else:
+            self.databases = databases
+
+        self.method = method
+        self.options = options
+        self.comment = comment
+        self.line = None
+