Add reminders module, add and help command

extensions/__init__.py

@@ -5,3 +5,4 @@ bot.load_extension("extensions.speak")
 bot.load_extension("extensions.extension")
 bot.load_extension("extensions.purge")
 bot.load_extension("extensions.poll")
+bot.load_extension("extensions.reminders")

extensions/reminders.py

@@ -0,0 +1,106 @@
+import re
+from datetime import datetime, timedelta
+
+from discord.ext import commands
+from discord import Embed
+from discord.ext.commands import CommandNotFound, BadArgument, MissingRequiredArgument
+from discord.ext import tasks
+
+from bot_bde.logger import logger
+
+
+extension_name = "reminders"
+logger = logger.getChild(extension_name)
+
+
+async def reminder_exec(coro):
+    await coro
+
+
+def time_pars(s: str) -> timedelta:
+    match = re.fullmatch(r"(?:([0-9]+)W)*(?:([0-9]+)D)*(?:([0-9]+)H)*(?:([0-9]+)M)*(?:([0-9]+)S)*", s.upper().replace(" ", "").strip())
+    if match:
+        w, d, h, m, s = match.groups()
+        if any([w, d, h, m, s]):
+            w, d, h, m, s = [i if i else 0 for i in [w, d, h, m, s]]
+            return timedelta(weeks=int(w), days=int(d), hours=int(h), minutes=int(m), seconds=int(s))
+    raise BadArgument()
+
+
+class Reminders(commands.Cog):
+    def __init__(self, bot: commands.Bot):
+        self.bot = bot
+        self.tasks = []
+
+    @commands.group("reminder", pass_context=True)
+    @commands.guild_only()
+    async def reminder(self, ctx: commands.Context):
+        if ctx.invoked_subcommand is None:
+            raise CommandNotFound()
+
+    @reminder.group("help", pass_context=True)
+    @commands.guild_only()
+    async def reminder_help(self, ctx: commands.Context):
+        embed = Embed(title="Reminder help")
+        embed.add_field(name="speak add <message> <time>", value="Add a reminder to your reminders list\n"
+                                                                 "Time: ?D?H?M?S", inline=False)
+        await ctx.send(embed=embed)
+
+    @reminder.group("add", pass_context=True)
+    @commands.guild_only()
+    async def reminder_add(self, ctx: commands.Context, message: str, time: str):
+        time = time_pars(time)
+        self.tasks.append({
+            "date": datetime.now() + time,
+            "coro": ctx.send(ctx.author.mention + " reminder !\n" + message)
+        })
+
+        hours, seconds = divmod(time.seconds, 3600)
+        minutes, seconds = divmod(seconds, 60)
+        await ctx.send(f"""Remind you in {f"{time.days}d {hours}h {minutes}m {seconds}s"
+            if time.days > 0 else f"{hours}h {minutes}m {seconds}s"
+            if hours > 0 else f"{minutes}m {seconds}s"
+            if minutes > 0 else f"{seconds}s"} !""")
+
+    @tasks.loop(minutes=1)
+    async def reminders_loop(self):
+        print("loop")
+        for i, t in enumerate(self.tasks):
+            if t["date"] <= datetime.now():
+                self.bot.loop.create_task(reminder_exec(t["coro"]))
+                del self.tasks[i]
+
+    @commands.Cog.listener()
+    async def on_command_error(self, ctx: commands.Context, error):
+        if ctx.invoked_with == extension_name or \
+                (ctx.command.root_parent is not None and ctx.command.root_parent.name == "reminder"):
+            if isinstance(error, CommandNotFound)\
+                    or isinstance(error, BadArgument)\
+                    or isinstance(error, MissingRequiredArgument):
+                await ctx.message.add_reaction("\u2753")
+                await ctx.message.delete(delay=30)
+            else:
+                await ctx.send("An error occurred !")
+                raise error
+
+
+def setup(bot):
+    logger.info(f"Loading...")
+    try:
+        reminders = Reminders(bot)
+        bot.add_cog(reminders)
+        reminders.reminders_loop.start()
+    except Exception as e:
+        logger.error(f"Error loading: {e}")
+    else:
+        logger.info(f"Load successful")
+
+
+def teardown(bot):
+    logger.info(f"Unloading...")
+    try:
+        bot.remove_cog("Reminders")
+    except Exception as e:
+        logger.error(f"Error unloading: {e}")
+    else:
+        logger.info(f"Unload successful")