guild.members: validate nickname on update_nickname

- schemas: add nickname type

litecord/blueprints/guild/members.py

@@ -170,13 +170,17 @@ async def update_nickname(guild_id):
     user_id = await token_check()
     await guild_check(user_id, guild_id)
 
-    j = await request.get_json()
+    j = validate(await request.get_json(), {
+        'nick': {'type': 'nickname'}
+    })
+
+    nick = j['nick'] or None
 
     await app.db.execute("""
     UPDATE members
     SET nickname = $1
     WHERE user_id = $2 AND guild_id = $3
-    """, j['nick'], user_id, guild_id)
+    """, nick, user_id, guild_id)
 
     member = await app.storage.get_member_data_one(guild_id, user_id)
     member.pop('joined_at')

litecord/schemas.py

@@ -127,6 +127,9 @@ class LitecordValidator(Validator):
     def _validate_type_theme(self, value: str) -> bool:
         return value in ['light', 'dark']
 
+    def _validate_type_nickname(self, value: str) -> bool:
+        return isinstance(value, str) and len(value) in range(1, 32)
+
 
 def validate(reqjson: Union[Dict, List], schema: Dict,
              raise_err: bool = True) -> Union[Dict, List]:
@@ -350,10 +353,7 @@ ROLE_UPDATE_POSITION = {
 
 MEMBER_UPDATE = {
     'nick': {
-        'type': 'username',
-        'minlength': 1, 'maxlength': 100,
-        'required': False,
-    },
+        'type': 'nickname', 'required': False},
     'roles': {'type': 'list', 'required': False,
               'schema': {'coerce': int}},
     'mute': {'type': 'boolean', 'required': False},