Start and delete game: check if the user has rights to execute the command

GameFiles/Game.py

@@ -42,6 +42,9 @@ class Game:
 	def get_gm_role(self) -> discord.Role:
 		return self.guild.get_role(self.get_gm_role_id())
 
+	def is_gm(self, user: discord.Member) -> bool:
+		return self.get_gm_role() in user.roles
+
 	def get_game_category_id(self) -> int:
 		return self.config["category"]
 

SecretBot.py

@@ -76,11 +76,12 @@ class SecretBot(commands.Cog):
 			raise utils.CheckFailDoNotNotify
 		return True
 
-	async def check_is_administrator_or_owner(self, ctx: commands.Context):
+	@staticmethod
+	async def check_is_administrator(ctx: commands.Context):
 		"""
-		Verify if the user has administrator rights or if it is the bot's owner. Notifies the user and raises utils.CheckFailDoNotNotify if not.
+		If the user that sent the command is not an administrator of the server, notify them and raise utils.CheckFailDoNotNotify.
 		"""
-		if not (ctx.author.guild_permissions.administrator or await self.bot.is_owner(ctx.author)):
+		if not utils.is_administrator(ctx.author):
 			await ctx.reply(f":dragon_face: You have no power here!")
 			raise utils.CheckFailDoNotNotify
 
@@ -90,6 +91,7 @@ class SecretBot(commands.Cog):
 
 	@commands.command("StartGame")
 	async def start_game(self, ctx: commands.Context, gm_role: discord.Role, player_role: discord.Role):
+		await self.check_is_administrator(ctx)
 		game = self.games_file[ctx.guild]
 		if game.is_started():
 			await ctx.reply(":x: a game is already running")
@@ -102,10 +104,13 @@ class SecretBot(commands.Cog):
 	async def delete_game(self, ctx: commands.Context):
 		game = self.games_file[ctx.guild]
 		if game.is_started():
-			gm_role = game.get_gm_role()
-			await game.delete(ctx.guild)
-			await ctx.guild.get_member(self.bot.user.id).remove_roles(gm_role)
-			await ctx.reply(":white_check_mark: Game deleted!")
+			if game.is_gm(ctx.author) or utils.is_administrator(ctx.author):
+				gm_role = game.get_gm_role()
+				await game.delete(ctx.guild)
+				await ctx.guild.get_member(self.bot.user.id).remove_roles(gm_role)
+				await ctx.reply(":white_check_mark: Game deleted!")
+			else:
+				await ctx.reply(f":dragon_face: You have no power here!")
 		else:
 			await ctx.reply(":x: Game is not running")
 

utils.py

@@ -10,6 +10,14 @@ class CheckFailDoNotNotify(commands.CheckFailure):
 	"""
 	pass
 
+
+def is_administrator(member: discord.Member) -> bool:
+	"""
+	:return: Whether the given guild member has administrator powers
+	"""
+	return member.guild_permissions.administrator
+
+
 @singledispatch
 def to_string(obj) -> str:
 	"""