schemas: use coerce to Feature instead of guild_features type

cleaner to write code for.

 - admin_api.features: support that

litecord/blueprints/admin_api/features.py

@@ -16,6 +16,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
+from typing import List
 
 from quart import Blueprint, current_app as app, jsonify, request
 
@@ -27,6 +28,11 @@ from litecord.enums import Feature
 bp = Blueprint('features_admin', __name__)
 
 
+async def _features_from_req() -> List[str]:
+    j = validate(await request.get_json(), FEATURES)
+    return [feature.value for feature in j['features']]
+
+
 async def _features(guild_id: int):
     return jsonify({
         'features': await app.storage.guild_features(guild_id)
@@ -45,8 +51,7 @@ async def _update_features(guild_id: int, features: list):
 async def replace_features(guild_id: int):
     """Replace the feature list in a guild"""
     await admin_check()
-    j = validate(await request.get_json(), FEATURES)
-    features = j['features']
+    features = await _features_from_req()
 
     # yes, we need to pass it to a set and then to a list before
     # doing anything, since the api client might just
@@ -59,9 +64,8 @@ async def replace_features(guild_id: int):
 async def insert_features(guild_id: int):
     """Insert a feature on a guild."""
     await admin_check()
-    j = validate(await request.get_json(), FEATURES)
+    to_add = await _features_from_req()
 
-    to_add = j['features']
     features = await app.storage.guild_features(guild_id)
     features = set(features)
 
@@ -77,8 +81,7 @@ async def insert_features(guild_id: int):
 async def remove_feature(guild_id: int):
     """Remove a feature from a guild"""
     await admin_check()
-    j = validate(await request.get_json(), FEATURES)
-    to_remove = j['features']
+    to_remove = await _features_from_req()
     features = await app.storage.guild_features(guild_id)
 
     for feature in to_remove:

litecord/schemas.py

@@ -28,7 +28,7 @@ from .permissions import Permissions
 from .types import Color
 from .enums import (
     ActivityType, StatusType, ExplicitFilter, RelationshipType,
-    MessageNotifications, ChannelType, VerificationLevel, Features
+    MessageNotifications, ChannelType, VerificationLevel, Feature
 )
 
 from litecord.embed.schemas import EMBED_OBJECT
@@ -145,9 +145,6 @@ class LitecordValidator(Validator):
     def _validate_type_nickname(self, value: str) -> bool:
         return isinstance(value, str) and (len(value) < 32)
 
-    def _validate_type_guild_feature(self, value: str) -> bool:
-        return value in Features.values()
-
 
 def validate(reqjson: Union[Dict, List], schema: Dict,
              raise_err: bool = True) -> Dict:
@@ -662,6 +659,6 @@ GET_MENTIONS = {
 FEATURES = {
     'features': {
         'type': 'list', 'required': True,
-        'schema': {'type': 'guild_feature'}
+        'schema': {'coerce': Feature}
     }
 }