Merge pull request #147 from classabbyamp/error-handling

Better command error handling
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0x5c 2020-01-04 01:55:42 -05:00 committed by GitHub
commit e1d4b2eab5
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4 changed files with 78 additions and 20 deletions

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@ -7,6 +7,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
### Added
- Flag emojis to commands with countries.
- Image attribution and description to "image" commands.
- Better user-facing command error handling.
- New key in options.py: pika.

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@ -42,8 +42,12 @@ cat = SimpleNamespace(lookup='Information Lookup',
study='Exam Study',
weather='Land and Space Weather')
emojis = SimpleNamespace(good='',
bad='')
emojis = SimpleNamespace(check_mark='',
x='',
warning='⚠️',
question='',
no_entry='',
bangbang='‼️')
paths = SimpleNamespace(data=Path("./data/"),
resources=Path("./resources/"),
@ -106,7 +110,7 @@ def error_embed_factory(ctx: commands.Context, exception: Exception, debug_mode:
else:
fmtd_ex = traceback.format_exception_only(exception.__class__, exception)
embed = embed_factory(ctx)
embed.title = "Error"
embed.title = "⚠️ Error"
embed.description = "```\n" + '\n'.join(fmtd_ex) + "```"
embed.colour = colours.bad
return embed
@ -124,5 +128,4 @@ async def add_react(msg: discord.Message, react: str):
async def check_if_owner(ctx: commands.Context):
if ctx.author.id in opt.owners_uids:
return True
await add_react(ctx.message, emojis.bad)
return False
raise commands.NotOwner

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@ -106,14 +106,18 @@ class BaseCog(commands.Cog):
embed.set_thumbnail(url=str(self.bot.user.avatar_url))
await ctx.send(embed=embed)
@commands.command(name="ping")
@commands.command(name="ping", aliases=['beep'])
async def _ping(self, ctx: commands.Context):
"""Show the current latency to the discord endpoint."""
content = ctx.message.author.mention if random.random() < 0.05 else ''
embed = cmn.embed_factory(ctx)
embed.title = "**Pong!**"
content = ''
if ctx.invoked_with == "beep":
embed.title = "**Boop!**"
else:
content = ctx.message.author.mention if random.random() < 0.05 else ''
embed.title = "🏓 **Pong!**"
embed.description = f'Current ping is {self.bot.latency*1000:.1f} ms'
await ctx.send(content=content, embed=embed)
await ctx.send(content, embed=embed)
@commands.command(name="changelog", aliases=["clog"])
async def _changelog(self, ctx: commands.Context):
@ -138,6 +142,20 @@ class BaseCog(commands.Cog):
await ctx.send(embed=embed)
@commands.command(name="issue")
async def _issue(self, ctx: commands.Context):
"""Shows how to create an issue for the bot."""
embed = cmn.embed_factory(ctx)
embed.title = "Found a bug? Have a feature request?"
embed.description = ("Submit an issue on the [issue tracker]"
"(https://github.com/classabbyamp/discord-qrm2/issues)!")
await ctx.send(embed=embed)
@commands.command(name="bruce", hidden=True)
async def _b_issue(self, ctx: commands.Context):
"""Shows how to create an issue for the bot."""
await ctx.invoke(self._issue)
@commands.command(name="echo", aliases=["e"], hidden=True)
@commands.check(cmn.check_if_owner)
async def _echo(self, ctx: commands.Context, channel: commands.TextChannelConverter, *, msg: str):

58
main.py
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@ -8,6 +8,9 @@ This file is part of discord-qrm2 and is released under the terms of the GNU
General Public License, version 2.
"""
import sys
import traceback
from datetime import time, datetime
import random
from types import SimpleNamespace
@ -42,6 +45,8 @@ bot = commands.Bot(command_prefix=opt.prefix,
bot.qrm = SimpleNamespace()
bot.qrm.session = aiohttp.ClientSession(headers={'User-Agent': f'discord-qrm2/{info.release}'})
bot.qrm.debug_mode = debug_mode
# --- Commands ---
@ -51,7 +56,7 @@ async def _restart_bot(ctx: commands.Context):
"""Restarts the bot."""
await bot.qrm.session.close()
global exit_code
await cmn.add_react(ctx.message, cmn.emojis.good)
await cmn.add_react(ctx.message, cmn.emojis.check_mark)
print(f"[**] Restarting! Requested by {ctx.author}.")
exit_code = 42 # Signals to the wrapper script that the bot needs to be restarted.
await bot.logout()
@ -63,7 +68,7 @@ async def _shutdown_bot(ctx: commands.Context):
"""Shuts down the bot."""
await bot.qrm.session.close()
global exit_code
await cmn.add_react(ctx.message, cmn.emojis.good)
await cmn.add_react(ctx.message, cmn.emojis.check_mark)
print(f"[**] Shutting down! Requested by {ctx.author}.")
exit_code = 0 # Signals to the wrapper script that the bot should not be restarted.
await bot.logout()
@ -92,9 +97,9 @@ async def _extctl_list(ctx: commands.Context):
async def _extctl_load(ctx: commands.Context, extension: str):
try:
bot.load_extension(ext_dir + "." + extension)
await cmn.add_react(ctx.message, cmn.emojis.good)
await cmn.add_react(ctx.message, cmn.emojis.check_mark)
except commands.ExtensionError as ex:
embed = cmn.error_embed_factory(ctx, ex, debug_mode)
embed = cmn.error_embed_factory(ctx, ex, bot.qrm.debug_mode)
await ctx.send(embed=embed)
@ -106,9 +111,9 @@ async def _extctl_reload(ctx: commands.Context, extension: str):
await cmn.add_react(ctx.message, pika)
try:
bot.reload_extension(ext_dir + "." + extension)
await cmn.add_react(ctx.message, cmn.emojis.good)
await cmn.add_react(ctx.message, cmn.emojis.check_mark)
except commands.ExtensionError as ex:
embed = cmn.error_embed_factory(ctx, ex, debug_mode)
embed = cmn.error_embed_factory(ctx, ex, bot.qrm.debug_mode)
await ctx.send(embed=embed)
@ -116,9 +121,9 @@ async def _extctl_reload(ctx: commands.Context, extension: str):
async def _extctl_unload(ctx: commands.Context, extension: str):
try:
bot.unload_extension(ext_dir + "." + extension)
await cmn.add_react(ctx.message, cmn.emojis.good)
await cmn.add_react(ctx.message, cmn.emojis.check_mark)
except commands.ExtensionError as ex:
embed = cmn.error_embed_factory(ctx, ex, debug_mode)
embed = cmn.error_embed_factory(ctx, ex, bot.qrm.debug_mode)
await ctx.send(embed=embed)
@ -146,6 +151,37 @@ async def on_message(message):
await bot.process_commands(message)
@bot.event
async def on_command_error(ctx: commands.Context, err: commands.CommandError):
if isinstance(err, commands.UserInputError):
await cmn.add_react(ctx.message, cmn.emojis.warning)
await ctx.send_help(ctx.command)
elif isinstance(err, commands.CommandNotFound) and not ctx.invoked_with.startswith("?"):
await cmn.add_react(ctx.message, cmn.emojis.question)
elif isinstance(err, commands.CheckFailure):
# Add handling of other subclasses of CheckFailure as needed.
if isinstance(err, commands.NotOwner):
await cmn.add_react(ctx.message, cmn.emojis.no_entry)
else:
await cmn.add_react(ctx.message, cmn.emojis.x)
elif isinstance(err, commands.DisabledCommand):
await cmn.add_react(ctx.message, cmn.emojis.bangbang)
elif isinstance(err, (commands.CommandInvokeError, commands.ConversionError)):
# Emulating discord.py's default beaviour.
print('Ignoring exception in command {}:'.format(ctx.command), file=sys.stderr)
traceback.print_exception(type(err), err, err.__traceback__, file=sys.stderr)
embed = cmn.error_embed_factory(ctx, err.original, bot.qrm.debug_mode)
embed.description += f"\n`{type(err).__name__}`"
await cmn.add_react(ctx.message, cmn.emojis.warning)
await ctx.send(embed=embed)
else:
# Emulating discord.py's default beaviour. (safest bet)
print('Ignoring exception in command {}:'.format(ctx.command), file=sys.stderr)
traceback.print_exception(type(err), err, err.__traceback__, file=sys.stderr)
await cmn.add_react(ctx.message, cmn.emojis.warning)
# --- Tasks ---
@tasks.loop(minutes=5)
@ -194,19 +230,19 @@ try:
except discord.LoginFailure as ex:
# Miscellaneous authentications errors: borked token and co
if debug_mode:
if bot.qrm.debug_mode:
raise
raise SystemExit("Error: Failed to authenticate: {}".format(ex))
except discord.ConnectionClosed as ex:
# When the connection to the gateway (websocket) is closed
if debug_mode:
if bot.qrm.debug_mode:
raise
raise SystemExit("Error: Discord gateway connection closed: [Code {}] {}".format(ex.code, ex.reason))
except ConnectionResetError as ex:
# More generic connection reset error
if debug_mode:
if bot.qrm.debug_mode:
raise
raise SystemExit("ConnectionResetError: {}".format(ex))