qrm2/exts/morse.py

"""
Morse Code extension for qrm
---
Copyright (C) 2019-2020 Abigail Gold, 0x5c

This file is part of discord-qrm2 and is released under the terms of
the GNU General Public License, version 2.
"""


import discord.ext.commands as commands

import common as cmn
from resources import morse


class MorseCog(commands.Cog):
    def __init__(self, bot: commands.Bot):
        self.bot = bot

    @commands.command(name="morse", aliases=["cw"], category=cmn.cat.ref)
    async def _morse(self, ctx: commands.Context, *, msg: str):
        """Converts ASCII to international morse code."""
        with ctx.typing():
            result = ""
            for char in msg.upper():
                try:
                    result += morse.morse[char]
                except KeyError:
                    result += "<?>"
                result += " "
            embed = cmn.embed_factory(ctx)
            embed.title = f"Morse Code for {msg}"
            embed.description = "**" + result + "**"
            embed.colour = cmn.colours.good
        await ctx.send(embed=embed)

    @commands.command(name="unmorse", aliases=["demorse", "uncw", "decw"], category=cmn.cat.ref)
    async def _unmorse(self, ctx: commands.Context, *, msg: str):
        """Converts international morse code to ASCII."""
        with ctx.typing():
            result = ""
            msg0 = msg
            msg = msg.split("/")
            msg = [m.split() for m in msg]
            for word in msg:
                for char in word:
                    try:
                        result += morse.ascii[char]
                    except KeyError:
                        result += "<?>"
                result += " "
            embed = cmn.embed_factory(ctx)
            embed.title = f"ASCII for {msg0}"
            embed.description = result
            embed.colour = cmn.colours.good
        await ctx.send(embed=embed)

    @commands.command(name="cwweight", aliases=["weight", "cww"], category=cmn.cat.ref)
    async def _weight(self, ctx: commands.Context, *, msg: str):
        """Calculates the CW Weight of a callsign or message."""
        embed = cmn.embed_factory(ctx)
        with ctx.typing():
            msg = msg.upper()
            weight = 0
            for char in msg:
                try:
                    cw_char = morse.morse[char].replace("-", "==")
                    weight += len(cw_char) * 2 + 2
                except KeyError:
                    embed.title = "Error in calculation of CW weight"
                    embed.description = f"Unknown character `{char}` in message"
                    embed.colour = cmn.colours.bad
                    await ctx.send(embed=embed)
                    return
            embed.title = f"CW Weight of {msg}"
            embed.description = f"The CW weight is **{weight}**"
            embed.colour = cmn.colours.good
        await ctx.send(embed=embed)


def setup(bot: commands.Bot):
    bot.add_cog(MorseCog(bot))