Improved error handling for MC username lookups

Geoffrey.py

@@ -44,7 +44,8 @@ async def on_command_error(error, ctx):
     elif isinstance(error.original, NoPermissionError):
         error_str = 'You don\'t have permission for that cool command.'
     elif isinstance(error.original, UsernameLookupFailed):
-        error_str = error.original.__doc__
+        error_str = 'Your user name was not found, either Mojang is having a fucky wucky ' \
+                    'or your nickname is not set correctly. *stares at the Mods*'
     elif isinstance(error.original, PlayerNotFound):
         error_str = 'Make sure to use ?register first you ding dong.'
     elif isinstance(error.original, EntryNameNotUniqueError):
@@ -64,7 +65,7 @@ def update_user_names(bot_commands):
     session = bot_commands.interface.database.Session()
     print("Updating MC usernames...")
     player_list = session.query(Player).all()
-
+    
     for player in player_list:
         player.name = grab_playername(player.mc_uuid)
 
@@ -89,8 +90,9 @@ if __name__ == '__main__':
     for extension in extensions:
         try:
             bot.load_extension(extension)
-        except Exception as e:
+        except:
             print('Failed to load extension {}'.format(extension))
+
     update_user_names(bot_commands)
     bot.run(TOKEN)
 

MinecraftAccountInfoGrabber.py

@@ -8,20 +8,27 @@ username_lookup_url = 'https://api.mojang.com/user/profiles/{}/names'
 
 
 def grab_json(url):
-    return requests.get(url).json()
-
-
-def grab_UUID(username):
     try:
-        player_data = grab_json(uuid_lookup_url.format(username))
-        return player_data['id']
+        json = requests.get(url).json()
+        if 'error' in json:
+            raise UsernameLookupFailed
+
     except JSONDecodeError:
         raise UsernameLookupFailed
 
+    return json
+
+def grab_UUID(username):
+    player_data = grab_json(uuid_lookup_url.format(username))
+    return player_data['id']
 
 def grab_playername(uuid):
     player_data = grab_json(username_lookup_url.format(uuid))
 
-    last_index = len(player_data)-1
+    if len(player_data) == 0:
+        raise UsernameLookupFailed
+    else:
+        last_index = len(player_data)-1
+
     return player_data[last_index]['name']
 

test_minecraftInfoGrabber.py

@@ -1,5 +1,6 @@
 from unittest import TestCase
 from MinecraftAccountInfoGrabber import *
+from BotErrors import UsernameLookupFailed
 
 
 class TestMinecraftInfoGrabber(TestCase):
@@ -12,3 +13,6 @@ class TestMinecraftInfoGrabber(TestCase):
 
     def test_grab_playername_wrong_case(self):
         self.assertEqual(grab_UUID('zerohd'), 'fe7e84132570458892032b69ff188bc3')
+
+    def test_grab_invalid_player(self):
+        self.assertRaises(UsernameLookupFailed, grab_UUID, 'lsdlkjsljglfjgldkj')