searchbot-discord/main.py

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# -*- coding: utf-8 -*-
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# search - a tiny little search utility bot for discord.
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# All original work by taciturasa, with some code by ry00001.
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# Used and modified with permission.
# See LICENSE for license information.
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'''Main File'''
import asyncio
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import json
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import os
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import sys
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from typing import List
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import aiohttp
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import discord
from discord.ext import commands
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import rethinkdb
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from extensions.models import searchexceptions
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class Bot(commands.Bot):
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"""Custom Bot Class that subclasses the commands.ext one"""
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def __init__(self, **options):
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"""Initializes the main parts of the bot."""
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# Initializes parent class
super().__init__(self._get_prefix_new, **options)
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# Setup
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self.extensions_list: List[str] = []
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self.debug_toggle = False
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with open('config.json') as f:
self.config = json.load(f)
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# Info
self.prefix: List[str] = self.config['PREFIX']
self.version: str = self.config['VERSION']
self.description: str = self.config['DESCRIPTION']
self.repo: str = self.config['REPO']
self.support_server: str = self.config['SERVER']
self.perms: int = self.config['PERMS']
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if not self.config['CACHE']:
self.max_messages = None
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# Toggles
self.maintenance: bool = self.config['MAINTENANCE']
self.case_insensitive: bool = self.config['CASE_INSENSITIVE']
self.custom_help: bool = self.config['CUSTOM_HELP']
self.mention_assist: bool = self.config['MENTION_ASSIST']
self.prefixless_dms: bool = self.config['PREFIXLESS_DMS']
# RethinkDB
if self.config['RETHINK']['DB']:
self.re = rethinkdb.RethinkDB()
self.re.set_loop_type('asyncio')
self.rdb: str = self.config['RETHINK']['DB']
self.conn = None
self.rtables: List[str] = []
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def _init_extensions(self):
"""Initializes extensions."""
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# Utils
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# Avoids race conditions with online
utils_dir = os.listdir('extensions/utils')
if 'online.py' in utils_dir:
utils_dir.remove('online.py')
bot.load_extension('extensions.utils.online')
# Rest of utils
for ext in utils_dir:
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if ext.endswith('.py'):
try:
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bot.load_extension(f'extensions.utils.{ext[:-3]}')
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self.extensions_list.append(
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f'extensions.utils.{ext[:-3]}')
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except Exception as e:
print(e)
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# Models
for ext in os.listdir('extensions/models'):
if ext.endswith('.py'):
try:
bot.load_extension(f'extensions.models.{ext[:-3]}')
self.extensions_list.append(
f'extensions.models.{ext[:-3]}')
except Exception as e:
print(e)
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# Extensions
for ext in os.listdir('extensions'):
if ext.endswith('.py'):
try:
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bot.load_extension(f'extensions.{ext[:-3]}')
self.extensions_list.append(
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f'extensions.{ext[:-3]}')
except Exception as e:
print(e)
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async def _init_rethinkdb(self):
"""Initializes RethinkDB."""
# Prerequisites
dbc = self.config['RETHINK']
# Error handling the initialization
try:
# Create connection
self.conn = await self.re.connect(
host=dbc['HOST'],
port=dbc['PORT'],
db=dbc['DB'],
user=dbc['USERNAME'],
password=dbc['PASSWORD']
)
# Create or get database
dbs = await self.re.db_list().run(self.conn)
if self.rdb not in dbs:
print('Database not present. Creating...')
await self.re.db_create(self.rdb).run(self.conn)
# Append any existing tables to rtables
tables = await self.re.db(self.rdb).table_list().run(self.conn)
self.rtables.extend(tables)
# Exit if fails bc bot can't run without db
except Exception as e:
print('RethinkDB init error!\n{}: {}'.format(type(e).__name__, e))
sys.exit(1)
print('RethinkDB initialisation successful.')
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async def _get_prefix_new(self, bot, msg):
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"""More flexible check for prefix."""
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# Adds empty prefix if in DMs
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if isinstance(msg.channel, discord.DMChannel) and self.prefixless_dms:
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plus_empty = self.prefix.copy()
plus_empty.append('')
return commands.when_mentioned_or(*plus_empty)(bot, msg)
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# Keeps regular if not
else:
return commands.when_mentioned_or(*self.prefix)(bot, msg)
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async def on_ready(self):
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"""Initializes the main portion of the bot once it has connected."""
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print('Connected.\n')
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# Prerequisites
if not hasattr(self, 'request'):
self.request = aiohttp.ClientSession()
if not hasattr(self, 'appinfo'):
self.appinfo = await self.application_info()
if self.description == '':
self.description = self.appinfo.description
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# Maintenance Mode
if self.maintenance:
async def presence_task():
await self.change_presence(
activity=discord.Activity(
name="Maintenance",
type=discord.ActivityType.watching
),
status=discord.Status.dnd
)
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else:
async def presence_task():
await self.change_presence(
activity=discord.Activity(
name=f"@{self.user.name}",
type=discord.ActivityType.listening
),
status=discord.Status.online
)
asyncio.create_task(presence_task())
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# NOTE Rethink Entry Point
# Initializes all rethink stuff
if hasattr(self, 'rdb') and not self.rtables:
await self._init_rethinkdb()
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# NOTE Extension Entry Point
# Loads core, which loads all other extensions
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if not self.extensions_list:
self._init_extensions()
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print('Initialized.\n')
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# Logging
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msg = "ALL ENGINES GO!\n"
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msg += "-----------------------------\n"
msg += f"ACCOUNT: {bot.user}\n"
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msg += f"OWNER: {self.appinfo.owner}\n"
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msg += "-----------------------------\n"
print(msg)
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# pylint: disable=no-member
self.logging.info(content=msg, name="On Ready")
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async def on_message(self, message):
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"""Handles what the bot does whenever a message comes across."""
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# Prerequisites
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mentions = [self.user.mention, f'<@!{self.user.id}>']
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ctx = await self.get_context(message)
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# Avoid warnings while loading
if not hasattr(bot, 'appinfo'):
return
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# Handling
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# Turn away bots
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elif message.author.bot:
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return
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# Ignore blocked users
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elif message.author.id in self.config.get('BLOCKED'):
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return
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# Maintenance mode
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elif (
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self.maintenance
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and not message.author.id == bot.appinfo.owner.id
):
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return
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# Empty ping for assistance
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elif message.content in mentions and self.mention_assist:
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assist_msg = (
"**Hi there! How can I help?**\n\n"
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# Two New Lines Here
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f"You may use **{self.user.mention}** `term here` to search, "
f"or **{self.user.mention}** `help` for assistance.")
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await ctx.send(assist_msg)
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# Move on to command handling
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else:
await self.process_commands(message)
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# Creates Bot object
bot = Bot()
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@bot.listen()
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async def on_command_error(ctx, error):
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"""Handles all errors stemming from ext.commands."""
# Lets other cogs handle CommandNotFound.
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# Change this if you want command not found handling.
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if (
isinstance(error, commands.CommandNotFound)
or isinstance(error, commands.CheckFailure)
):
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return
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# Custom message for if an argument is missing.
elif isinstance(error, commands.MissingRequiredArgument):
await ctx.send(
f"**Missing Argument!** A `{error.param.name}` is needed."
)
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elif isinstance(error, searchexceptions.SafesearchFail):
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await ctx.send(
"**Sorry!** That query included language "
"we cannot accept in a non-NSFW channel. "
"Please try again in an NSFW channel."
)
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# Provides a very pretty embed if something's actually a dev's fault.
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elif isinstance(error, commands.CommandInvokeError):
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# Prerequisites
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embed_fallback = (
f"**An error occured: {type(error).__name__}. "
f"Please contact {bot.appinfo.owner}.**"
)
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error_embed = await bot.logging.error( # pylint: disable=no-member
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error, ctx,
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ctx.command.cog.qualified_name if ctx.command.cog.qualified_name
else "DMs"
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)
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# Sending
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await ctx.send(embed_fallback, embed=error_embed)
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# If anything else goes wrong, just go ahead and send it in chat.
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else:
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await bot.logging.error( # pylint: disable=no-member
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error, ctx,
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ctx.command.cog.qualified_name if ctx.command.cog.qualified_name
else "DMs"
)
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await ctx.send(error)
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# NOTE Bot Entry Point
# Starts the bot
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print("Connecting...\n")
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bot.run(bot.config['TOKEN'])