Add client, room and center args to set_modes

New arguments to make specifying the target machines more flexible when
changing their boot mode (known as "set client mode"). These argument
are optional although any of them must be used to specify some target.

	--client IP
	--room id
	--center id

The arguments can be specified several times like "--client ip --client
ip --room id --room id --room id", etc.

Center or room id can be obtained via /scopes.

As of this patch, set_modes does iterate through the whole /scopes
output and then filters ips with those that were specified by user.

cli/objects/modes.py

@@ -18,18 +18,28 @@ class OgModes():
 	@staticmethod
 	def set_modes(rest, args):
 		parser = argparse.ArgumentParser()
-		parser.add_argument('--scope-id',
-				    nargs=1,
-				    required=True,
-				    help='ID of the scope')
-		parser.add_argument('--scope-type',
-				    nargs=1,
-				    required=True,
-				    help='Type of the scope')
+		group = parser.add_argument_group('clients', 'Client selection args')
+		group.add_argument('--center',
+				   type=int,
+				   action='append',
+				   default=[],
+				   required=False,
+				   help='Clients from given center')
+		group.add_argument('--room',
+				   type=int,
+				   action='append',
+				   default=[],
+				   required=False,
+				   help='Clients from given room')
+		group.add_argument('--client',
+				   action='append',
+				   default=[],
+				   required=False,
+				   help='Specific client IP')
 		parser.add_argument('--mode',
 				    nargs=1,
 				    required=True,
-				    help='Mode for the scope')
+				    help='Boot mode to be set')
 		parsed_args = parser.parse_args(args)
 
 		def scope_lookup(scope_id, scope_type, d):
@@ -54,15 +64,20 @@ class OgModes():
 
 		r = rest.get('/scopes')
 		scopes = r.json()
-		found_scope = scope_lookup(int(parsed_args.scope_id[0]),
-					   parsed_args.scope_type[0],
-					   scopes)
+		ips = set()
 
-		if found_scope is None:
-			print("Scope not found")
+		for center in parsed_args.center:
+			center_scope = scope_lookup(center, 'center', scopes)
+			ips.update(ips_in_scope(center_scope))
+		for room in parsed_args.room:
+			room_scope = scope_lookup(room, 'room', scopes)
+			ips.update(ips_in_scope(room_scope))
+		for l in parsed_args.client:
+			ips.add(l)
+
+		if not ips:
+			print("No clients found")
 			return None
 
-		ips = ips_in_scope(found_scope)
-
-		payload = {'clients': ips, 'mode': parsed_args.mode[0]}
+		payload = {'clients': list(ips), 'mode': parsed_args.mode[0]}
 		r = rest.post('/mode', payload=payload)