bot.py

from discord.ext import commands
from bb8.embed import CardImage
from bb8.search import Search
from bb8.swdestinydb import SWDestinyDBClient

import logging
import os

DISCORD_TOKEN = os.environ.get("DISCORD_TOKEN")

db_client = SWDestinyDBClient()
search = Search(db_client)

class BB8(commands.Bot):

    def __init__(self, extensions, search, **options):
        super().__init__(**options)
        self.initial_extensions = extensions
        self.search = search

        self.load_extensions()

    def load_extensions(self):
        for extension in self.initial_extensions:
            self.load_extension(extension)
            print(f'Loaded extension {extension}')

    async def on_ready(self, *_):       
        print(f"Logged in as {self.user} with id {self.user.id}")


def main():
    bot = BB8(
        extensions=['bb8.cards'],
        search=search,
        command_prefix="!", 
        description="Provides useful commands for Star Wars Destiny fans."
    )
    bot.run(DISCORD_TOKEN)


if __name__ == "__main__":
    main()

cards.py

from discord.ext import commands
from .embed import CardImage

import re


class SWCardSearch:    
    # Regex to parse card mentions from regular messages.
    PATTERN = r"\[\[(.+)\]\]"

    def __init__(self, bot):
        self.bot = bot

    @commands.command(description="Search for card on Star Wars Destiny DB")
    async def card(self, *, terms):        
        card = self.bot.search.find_card(terms)

        if card:
            embed = CardImage(card).render()
            await self.bot.say(embed=embed)

    async def on_message(self, message):        
        if message.author.bot:
            return

        queries = set(re.findall(SWCardSearch.PATTERN, message.content))
        for query in queries:
            card = self.bot.search.find_card(query)

            if card:
                await self.bot.send_message(message.channel, card["imagesrc"])
            else:
                await self.bot.send_message(message.channel, f"No card found. :(")

        await self.bot.process_commands(message) 


def setup(bot):
    bot.add_cog(SWCardSearch(bot))