commit be14648dfd1fa786c8c6ba91af774781603603b7
Author: Hipstercat <tasty@hipstercat.fr>
Date:   Mon Sep 28 03:40:13 2020 +0200

    init

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+data/
+venv/
+.idea/
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diff --git a/cogs/sacrifice/__init__.py b/cogs/sacrifice/__init__.py
new file mode 100644
index 0000000..c3c7839
--- /dev/null
+++ b/cogs/sacrifice/__init__.py
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+from .sacrifice import SacrificeCog
+import asyncio
+
+
+def setup(bot):
+    n = SacrificeCog(bot)
+    bot.add_cog(n)
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diff --git a/cogs/sacrifice/sacrifice.py b/cogs/sacrifice/sacrifice.py
new file mode 100644
index 0000000..2214aa1
--- /dev/null
+++ b/cogs/sacrifice/sacrifice.py
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+import math
+
+from redbot.core import commands
+from redbot.core import Config, checks
+import discord
+import re
+
+
+class SacrificeCog(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot
+        self.config = Config.get_conf(self, identifier=154776548)
+        default_global = {
+            "elo": {},
+            "tracked_msgs": {}
+        }
+        self.config.register_global(**default_global)
+
+    @staticmethod
+    def is_valid_winloss(s):
+        r = r"[wWlL]+"
+        regx = re.compile(r)
+        fm = regx.fullmatch(s)
+        return fm
+
+    async def get_rank(self, discord_id: str):
+        elos = await self.config.elo()
+        if discord_id not in elos:
+            return None, None
+        sorted_players = sorted(elos, key=elos.get, reverse=True)
+        return sorted_players.index(discord_id) + 1, len(sorted_players)
+
+    @commands.Cog.listener()
+    async def on_raw_reaction_add(self, payload):
+        tracked = await self.config.tracked_msgs()
+        print(str(payload.message_id))
+        print(tracked.keys())
+        if str(payload.message_id) in tracked.keys():
+            # fetch channel
+            channel = await self.bot.fetch_channel(531832488901738508)  # channel
+            if not channel:
+                print("not channel")
+                tracked.remove(payload.message_id)
+                await self.config.tracked_msgs.set(tracked)
+                return
+            # fetch msg
+            orig_msg = await channel.fetch_message(payload.message_id)
+            if not orig_msg:
+                print("not msg")
+                tracked.remove(payload.message_id)
+                await self.config.tracked_msgs.set(tracked)
+                return
+            opponents = orig_msg.mentions
+            if not opponents:
+                print("not opponent")
+                tracked.remove(payload.message_id)
+                await self.config.tracked_msgs.set(tracked)
+                return
+
+            opponent = opponents[0]
+
+            print("not yet")
+            print(str(payload.user_id))
+            print(str(opponent.id))
+            print(payload.emoji)
+            if str(payload.user_id) == str(opponent.id) and payload.emoji.name == "👍":
+                print("true")
+                outcome = orig_msg.content.split(" ")[2]
+                print(outcome)  # DEBUG
+                if SacrificeCog.is_valid_winloss(outcome):
+                    for c in outcome:
+                        if c.lower() == "w":
+                            await self.win(str(orig_msg.author.id), str(opponent.id))
+                        elif c.lower() == "l":
+                            await self.win(str(opponent.id), str(orig_msg.author.id))
+
+                    new_elo = await self.get_elo(str(orig_msg.author.id))
+                    new_elo_2 = await self.get_elo(str(opponent.id))
+
+                    bot_msg = await channel.fetch_message(tracked[str(payload.message_id)])
+
+                    await bot_msg.edit(content="**%s**, your new ELO is: **%s**\n**%s**, your new ELO is: **%s**" % (
+                        orig_msg.author.mention, round(new_elo), opponent.mention, round(new_elo_2))
+                    )
+
+                    del tracked[str(payload.message_id)]
+                    await self.config.tracked_msgs.set(tracked)
+                    return
+                else:
+                    print("not valid winloss: %s" % outcome)
+        else:
+            print("not tracked")
+
+    async def track_msg(self, orig_message_id: str, bot_msg_id: str):
+        tracked = await self.config.tracked_msgs()
+        tracked[orig_message_id] = bot_msg_id
+        await self.config.tracked_msgs.set(tracked)
+
+    @commands.command()
+    async def rank(self, ctx, opponent: discord.Member = None, winloss: str = None):
+        author_id = str(ctx.author.id)
+        if not opponent and not winloss:
+            # send elo to player
+            rank, count = await self.get_rank(author_id)
+            if rank:
+                elo = await self.get_elo(author_id)
+                await ctx.send("**%s**, your ELO is: **%s** (ranked #%s/%s)" % (ctx.author.mention, round(elo), rank, count))
+            else:
+                await ctx.send("**%s**, you are not ranked yet" % ctx.author.mention)
+            return
+        elif opponent and not winloss:
+            # show opponent rank
+            opponent_id = str(opponent.id)
+            rank, count = await self.get_rank(opponent_id)
+            if rank:
+                elo = await self.get_elo(opponent_id)
+                await ctx.send("**%s**' ELO is: **%s** (ranked #%s/%s)" % (opponent.display_name, round(elo), rank, count))
+            else:
+                await ctx.send("**%s** is not ranked yet" % opponent.display_name)
+            return
+        elif opponent and winloss:
+            if not SacrificeCog.is_valid_winloss(winloss):
+                await ctx.send("Invalid win/losses")
+                return
+
+            bot_msg = await ctx.send("Waiting for %s' :thumbsup: reaction to previous message..." % opponent.display_name)
+            await self.track_msg(str(ctx.message.id), str(bot_msg.id))
+            return
+
+    @staticmethod
+    def expection(d):
+        return 1/(1+math.pow(10, -d/400))  # https://fr.wikipedia.org/wiki/Classement_Elo#Relation_entre_diff%C3%A9rence_de_points_Elo_et_probabilit%C3%A9_de_gain
+
+    async def win(self, winner_id: str, looser_id: str) -> None:
+        elo_winner = await self.get_elo(winner_id)
+        elo_looser = await self.get_elo(looser_id)
+        diff = elo_winner - elo_looser
+        expection_winner = SacrificeCog.expection(diff)
+        expection_looser = SacrificeCog.expection(-diff)
+        k_winner = 40  # TODO: should be lowered after many games
+        k_looser = 40  # TODO: should be lowered after many games
+        new_elo_winner = elo_winner + k_winner * (1 - expection_winner)
+        print("%s = %s + %s * (1 - %s)" % (new_elo_winner, elo_winner, k_winner, expection_winner))
+        new_elo_looser = elo_looser + k_looser * (0 - expection_looser)
+        await self.save_elo({winner_id: new_elo_winner, looser_id: new_elo_looser})
+
+    async def save_elo(self, scores: dict) -> None:
+        elos = await self.config.elo()
+        elos.update(scores)
+        print(scores)
+        print(elos)
+        await self.config.elo.set(elos)
+
+    async def get_elo(self, discord_id: str) -> int:
+        elos = await self.config.elo()
+        if discord_id in elos:
+            return elos[discord_id]
+        else:
+            # calculate new elo
+            return 1500
diff --git a/requirements.txt b/requirements.txt
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--- /dev/null
+++ b/requirements.txt
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+Red-DiscordBot
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