Error handling, API caching (thanks @GlitterButts)

jarvis/cogs/admin.py

@@ -17,7 +17,7 @@ class AdminCog(commands.Cog):
         self.db = DBManager(config.mongo)
 
     @commands.command(name="ban")
-    @commands.has_permissions(administrator=True)
+    @commands.has_permissions(ban_members=True)
     async def _ban(self, ctx, user: User = None, reason=None):
         if not user or user == ctx.message.author:
             await ctx.send("You cannot ban yourself.")
@@ -36,7 +36,7 @@ class AdminCog(commands.Cog):
         )
 
     @commands.command(name="kick")
-    @commands.has_permissions(administrator=True)
+    @commands.has_permissions(kick_members=True)
     async def _kick(self, ctx, user: User = None, reason=None):
         if not user or user == ctx.message.author:
             await ctx.send("You cannot kick yourself.")
@@ -50,15 +50,10 @@ class AdminCog(commands.Cog):
         )
         await ctx.guild.kick(user, reason=reason)
         await ctx.send(
-            f"{user.name} has been banned from {guild_name}."
+            f"{user.name} has been kicked from {guild_name}."
             + f"Reason:\n{reason}"
         )
 
-    @commands.Cog.listener()
-    async def on_command_error(self, ctx, error):
-        if isinstance(error, commands.errors.MissingPermissions):
-            await ctx.send("I'm afraid I can't let you do that.")
-
 
 def setup(bot):
     bot.add_cog(AdminCog(bot))

jarvis/cogs/dbrand.py

@@ -22,6 +22,7 @@ class DbrandCog(commands.Cog):
         self._session = aiohttp.ClientSession()
         self._session.headers.update({"Content-Type": "application/json"})
         self.api_url = get_config().urls["dbrand_shipping"]
+        self.cache = {}
 
     @commands.group(name="db", aliases=["dbrand"], pass_context=True)
     async def _db(self, ctx):
@@ -72,16 +73,16 @@ class DbrandCog(commands.Cog):
             if len(matches) > 0:
                 search = matches[0]
         dest = search
-        api_link = self.api_url + dest
+        if not self.cache.contains(dest):
-        try:
+            api_link = self.api_url + dest
             data = await self._session.get(api_link)
-        except Exception as e:
+            if 200 <= data.status < 400:
-            print(e)
+                data = await data.json()
+            else:
+                data = None
+            self.cache.update(dest)
+        data = self.cache.get(dest)
         fields = None
-        if 200 <= data.status < 400:
-            data = await data.json()
-        else:
-            data = None
         if (
             data is not None
             and data["is_valid"]

jarvis/cogs/dev.py

@@ -300,13 +300,6 @@ class DevCog(commands.Cog):
 
         del args, code
 
-    @commands.Cog.listener()
-    async def on_command_error(self, ctx, error):
-        if isinstance(error, commands.errors.MissingPermissions):
-            await ctx.send("I'm afraid I can't let you do that.")
-        else:
-            await ctx.send(f"Error processing command:\n```{error}```")
-
 
 def setup(bot):
     bot.add_cog(DevCog(bot))

jarvis/cogs/error.py

@@ -0,0 +1,22 @@
+import jarvis
+from discord.ext import commands
+
+
+class ErrorHandlerCog(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot
+
+    @commands.Cog.listener()
+    async def on_command_error(self, ctx, error):
+        if isinstance(error, commands.errors.MissingPermissions):
+            await ctx.send("I'm afraid I can't let you do that.")
+        elif isinstance(error, commands.errors.CommandNotFound):
+            await ctx.send(
+                "Command does not exist. Run `>help` to get a list of commands"
+            )
+        else:
+            await ctx.send(f"Error processing command:\n```{error}```")
+
+
+def setup(bot):
+    bot.add_cog(ErrorHandlerCog(bot))

jarvis/cogs/owner.py

@@ -150,11 +150,6 @@ class OwnerCog(commands.Cog):
         reload_config()
         await ctx.send("System refreshed")
 
-    @commands.Cog.listener()
-    async def on_command_error(self, ctx, error):
-        if isinstance(error, commands.errors.MissingPermissions):
-            await ctx.send("I'm afraid I can't let you do that.")
-
 
 def setup(bot):
     bot.add_cog(OwnerCog(bot))