+ Added Error manager

Author: caffeine-addictt

src/cogs/error_manager.py

@@ -0,0 +1,83 @@
+import math
+import traceback
+import discord
+from discord.ext import commands
+
+from src.utils import Error, Embeds
+from src.config import Config
+
+
+class ErrorManager(commands.Cog):
+  """hidden"""
+  def __init__(self, client):
+    self.client = client
+
+  @commands.Cog.listener()
+  async def on_ready(self):
+    print('Error manager online')
+
+  @commands.Cog.listener()
+  async def on_command_error(self, ctx, error):
+    prefix = Config.COMMAND_PREFIX
+    embed = Embeds()
+    embed.color = discord.Color.dark_red()
+
+    if isinstance(error, Error):
+      embed.description = error.description
+      for field in error.fields.values():
+        field['inline'] = ('inline' in field) and field['inline'] or False
+        embed.add_field(**field)
+
+    elif isinstance(error, commands.CommandNotFound):
+      embed.description= f'Command not found! `{prefix}help` for a list of commands!'
+
+    elif isinstance(error, commands.BotMissingPermissions):
+      missing = [perm.replace('_', ' ').replace('guild', 'server').title() for perm in error.missing_perms]
+      if len(missing) > 2:
+        fmt = '{}, and {}'.format("**, **".join(missing[:-1]), missing[-1])
+      else:
+        fmt = ' and '.join(missing)
+        embed.description = 'I need the **{}** permission(s) to run this command.'.format(fmt)
+
+    elif isinstance(error, commands.DisabledCommand):
+      embed.description = 'The command has been disabled!'
+
+    elif isinstance(error, commands.CommandOnCooldown):
+      embed.description = 'This command is on cooldown, please retry in {}s.'.format(math.ceil(error.retry_after))
+
+    elif isinstance(error, commands.MissingPermissions):
+      missing = [perm.replace('_', ' ').replace('guild', 'server').title() for perm in error.missing_perms]
+      if len(missing) > 2:
+        fmt = '{}, and {}'.format("**, **".join(missing[:-1]), missing[-1])
+      else:
+        fmt = ' and '.join(missing)
+        embed.description = 'You need the **{}** permission(s) to use this command.'.format(fmt)
+
+    elif isinstance(error, commands.NoPrivateMessage):
+      try:
+        await ctx.author.send('This command cannot be used in direct messages.')
+      except discord.Forbidden:
+        pass
+
+    elif isinstance(error, commands.CheckFailure):
+      embed.description = 'You do not have permission to use this command!'
+
+    elif isinstance(error, commands.UserInputError):
+      embed.description = f'Invalid arguments! `{prefix}help` for a list of commands!'
+      embed.add_field(
+        name = 'Invalid Arguments',
+        value = error,
+        inline = False
+      )
+
+    elif isinstance(error, commands.CommandError): # Custom Error
+      embed.description = str(error)
+
+    await ctx.reply(ctx.author.mention, embed = embed, ephemeral = True)
+    print(error)
+    traceback.print_exc()
+
+
+
+async def setup(client):
+  await client.add_cog(ErrorManager(client))