searchbot-discord/main.py
2020-04-06 12:26:15 -04:00

302 lines
9.5 KiB
Python

# -*- coding: utf-8 -*-
# search - a tiny little search utility bot for discord.
# All original work by taciturasa, with some code by ry00001.
# Used and modified with permission.
# See LICENSE for license information.
'''Main File'''
import json
import os
import sys
from typing import List
import aiohttp
import discord
from discord.ext import commands
import rethinkdb
from extensions.models import SearchExceptions
class Bot(commands.Bot):
"""Custom Bot Class that subclasses the commands.ext one"""
def __init__(self, **options):
"""Initializes the main parts of the bot."""
# Initializes parent class
super().__init__(self._get_prefix_new, **options)
# Setup
self.extensions_list: List[str] = []
self.debug_toggle = False
with open('config.json') as f:
self.config = json.load(f)
# 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']
if not self.config['CACHE']:
self.max_messages = None
# 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] = []
def _init_extensions(self):
"""Initializes extensions."""
# Utils
# 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:
if ext.endswith('.py'):
try:
bot.load_extension(f'extensions.utils.{ext[:-3]}')
self.extensions_list.append(
f'extensions.utils.{ext[:-3]}')
except Exception as e:
print(e)
# 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)
# Extensions
for ext in os.listdir('extensions'):
if ext.endswith('.py'):
try:
bot.load_extension(f'extensions.{ext[:-3]}')
self.extensions_list.append(
f'extensions.{ext[:-3]}')
except Exception as e:
print(e)
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.')
async def _get_prefix_new(self, bot, msg):
"""More flexible check for prefix."""
# Adds empty prefix if in DMs
if isinstance(msg.channel, discord.DMChannel) and self.prefixless_dms:
plus_empty = self.prefix.copy()
plus_empty.append('')
return commands.when_mentioned_or(*plus_empty)(bot, msg)
# Keeps regular if not
else:
return commands.when_mentioned_or(*self.prefix)(bot, msg)
async def on_ready(self):
"""Initializes the main portion of the bot once it has connected."""
print('Connected.\n')
# 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
# Maintenance Mode
if self.maintenance:
await self.change_presence(
activity=discord.Activity(
name="Maintenance",
type=discord.ActivityType.watching
),
status=discord.Status.dnd
)
else:
await self.change_presence(
activity=discord.Activity(
name=f"@{self.user.name}",
type=discord.ActivityType.listening
),
status=discord.Status.online
)
# NOTE Rethink Entry Point
# Initializes all rethink stuff
if hasattr(self, 'rdb') and not self.rtables:
await self._init_rethinkdb()
# NOTE Extension Entry Point
# Loads core, which loads all other extensions
if not self.extensions_list:
self._init_extensions()
print('Initialized.\n')
# Logging
msg = "ALL ENGINES GO!\n"
msg += "-----------------------------\n"
msg += f"ACCOUNT: {bot.user}\n"
msg += f"OWNER: {self.appinfo.owner}\n"
msg += "-----------------------------\n"
print(msg)
await self.logging.info(content=msg, name="On Ready")
async def on_message(self, message):
"""Handles what the bot does whenever a message comes across."""
# Prerequisites
mentions = [self.user.mention, f'<@!{self.user.id}>']
ctx = await self.get_context(message)
# Avoid warnings while loading
if not hasattr(bot, 'appinfo'):
return
# Handling
# Turn away bots
elif message.author.bot:
return
# Ignore blocked users
elif message.author.id in self.config.get('BLOCKED'):
return
# Maintenance mode
elif (
self.maintenance
and not message.author.id == bot.appinfo.owner.id
):
return
# Empty ping for assistance
elif message.content in mentions and self.mention_assist:
assist_msg = (
"**Hi there! How can I help?**\n\n"
# Two New Lines Here
f"You may use **{self.user.mention}** `term here` to search, "
f"or **{self.user.mention}** `help` for assistance.")
await ctx.send(assist_msg)
# Move on to command handling
else:
await self.process_commands(message)
# Creates Bot object
bot = Bot()
@bot.listen()
async def on_command_error(ctx, error):
"""Handles all errors stemming from ext.commands."""
# Lets other cogs handle CommandNotFound.
# Change this if you want command not found handling.
if (
isinstance(error, commands.CommandNotFound)
or isinstance(error, commands.CheckFailure)
):
return
# 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."
)
elif isinstance(error, SearchExceptions.SafesearchFail):
await ctx.send(
"**Sorry!** That query included language "
"we cannot accept in a non-NSFW channel. "
"Please try again in an NSFW channel."
)
# Provides a very pretty embed if something's actually a dev's fault.
elif isinstance(error, commands.CommandInvokeError):
# Prerequisites
embed_fallback = (
f"**An error occured: {type(error).__name__}. "
f"Please contact {bot.appinfo.owner}.**"
)
error_embed = await bot.logging.error(
error, ctx,
ctx.command.cog.qualified_name if ctx.command.cog.qualified_name
else "DMs"
)
# Sending
await ctx.send(embed_fallback, embed=error_embed)
# If anything else goes wrong, just go ahead and send it in chat.
else:
await bot.logging.error(
error, ctx,
ctx.command.cog.qualified_name if ctx.command.cog.qualified_name
else "DMs"
)
await ctx.send(error)
# NOTE Bot Entry Point
# Starts the bot
print("Connecting...\n")
bot.run(bot.config['TOKEN'])