Add extension invite

db/InviteRole.py

@@ -0,0 +1,14 @@
+from db import Base
+from sqlalchemy import Column, BigInteger, String
+
+
+class InviteRole(Base):
+    __tablename__ = "invite_role"
+    guild_id = Column(BigInteger, primary_key=True)
+    invite_code = Column(String, primary_key=True)
+    role_id = Column(BigInteger, nullable=False)
+
+    def __init__(self, guild_id: int, invite_code: str, role_id: int):
+        self.guild_id = guild_id
+        self.role_id = role_id
+        self.invite_code = invite_code

db/__init__.py

@@ -12,4 +12,5 @@ from db.RoRec import RoRec
 from db.Polls import Polls
 from db.Warn import Warn
 from db.WarnAction import WarnAction
+from db.InviteRole import InviteRole
 Base.metadata.create_all(engine)

extensions/__init__.py

@@ -11,3 +11,4 @@ bot.load_extension("extensions.rorec")
 bot.load_extension("extensions.warn")
 bot.load_extension("extensions.pcp")
 bot.load_extension("extensions.tex")
+bot.load_extension("extensions.invite")

extensions/invite.py

@@ -0,0 +1,134 @@
+import re
+
+from discord import Embed, Member, Guild
+from discord.errors import Forbidden
+from discord.ext import commands
+from discord.ext.commands import BadArgument
+
+import db
+from administrator.logger import logger
+
+extension_name = "invite"
+logger = logger.getChild(extension_name)
+role_mention_re = re.compile(r"<@&[0-9]+>")
+channel_mention_re = re.compile(r"<#[0-9]+>")
+
+
+class Invite(commands.Cog):
+    def __init__(self, bot: commands.Bot):
+        self.bot = bot
+        self.invites = {}
+        self.bot.loop.create_task(self.update_invites())
+
+    def description(self):
+        return "Get role from a special invite link"
+
+    @commands.group("invite", pass_context=True)
+    @commands.guild_only()
+    @commands.has_guild_permissions(administrator=True)
+    async def invite(self, ctx: commands.Context):
+        if ctx.invoked_subcommand is None:
+            await ctx.invoke(self.invite_help)
+
+    @invite.group("help", pass_context=True)
+    async def invite_help(self, ctx: commands.Context):
+        embed = Embed(title="Invite help")
+        embed.add_field(name="invite create <#channel> <@role>", value="Create a invite link to a role", inline=False)
+        embed.add_field(name="invite delete <code>", value="Remove a invite", inline=False)
+        await ctx.send(embed=embed)
+
+    @invite.group("create", pass_context=True)
+    async def invite_add(self, ctx: commands.Context, channel: str, role: str):
+        if not channel_mention_re.fullmatch(channel) or len(ctx.message.channel_mentions) != 1 or\
+                not role_mention_re.fullmatch(role) or len(ctx.message.role_mentions) != 1:
+            raise BadArgument()
+
+        inv = await ctx.message.channel_mentions[0].create_invite()
+        s = db.Session()
+        s.add(db.InviteRole(ctx.guild.id, inv.code, ctx.message.role_mentions[0].id))
+        s.commit()
+        s.close()
+        await ctx.send(f"Invite created: `{inv.url}`")
+
+    @invite.group("delete", pass_context=True)
+    async def invite_delete(self, ctx: commands.Context, code: str):
+        inv = next(filter(lambda i: i.code == code, await ctx.guild.invites()), None)
+        if not inv:
+            raise BadArgument()
+
+        s = db.Session()
+        invite_role = s.query(db.InviteRole).get({"guild_id": ctx.guild.id, "invite_code": code})
+        if not invite_role:
+            s.close()
+            raise BadArgument()
+        s.delete(invite_role)
+        s.commit()
+        s.close()
+        await inv.delete()
+        await ctx.message.add_reaction("\U0001f44d")
+
+    async def update_invites(self):
+        for g in self.bot.guilds:
+            self.invites[g.id] = await g.invites()
+
+    @commands.Cog.listener()
+    async def on_ready(self):
+        await self.update_invites()
+
+    @commands.Cog.listener()
+    async def on_member_join(self, member: Member):
+        user_invites = await member.guild.invites()
+        for i in self.invites[member.guild.id]:
+            for ui in user_invites:
+                if i.code == ui.code and i.uses < ui.uses:
+                    s = db.Session()
+                    invite_role = s.query(db.InviteRole).get({"guild_id": member.guild.id, "invite_code": i.code})
+                    s.close()
+                    if invite_role:
+                        try:
+                            await member.add_roles(member.guild.get_role(invite_role.role_id))
+                        except Forbidden:
+                            pass
+        self.invites[member.guild.id] = user_invites
+
+    @commands.Cog.listener()
+    async def on_invite_delete(self, invite):
+        s = db.Session()
+        invite_role = s.query(db.InviteRole).get({"guild_id": invite.guild.id, "invite_code": invite.code})
+        if invite_role:
+            s.delete(invite_role)
+            s.commit()
+        s.close()
+
+    @commands.Cog.listener()
+    async def on_guild_join(self, guild: Guild):
+        self.invites[guild.id] = await guild.invites()
+
+    @commands.Cog.listener()
+    async def on_guild_remove(self, guild: Guild):
+        s = db.Session()
+        for g in s.query(db.InviteRole).filter(db.InviteRole.guild_id == guild.id).all():
+            s.delete(g)
+        s.commit()
+        s.close()
+        del self.invites[guild.id]
+
+
+def setup(bot):
+    logger.info(f"Loading...")
+    try:
+        bot.add_cog(Invite(bot))
+    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("Invite")
+    except Exception as e:
+        logger.error(f"Error unloading: {e}")
+    else:
+        logger.info(f"Unload successful")