Add allow and deny command to chan and move main command to create

extensions/chan.py

@@ -1,10 +1,10 @@
 from discord.ext import commands
-from discord import Embed, TextChannel
-from discord.ext.commands import CommandNotFound, MissingRequiredArgument
+from discord import Embed, TextChannel, VoiceChannel
+from discord.abc import GuildChannel
+from discord.ext.commands import CommandNotFound, MissingRequiredArgument, CheckFailure, BadArgument
 
 from bot_bde.logger import logger
 
-
 extension_name = "chan"
 logger = logger.getChild(extension_name)
 REACTIONS = []
@@ -13,6 +13,29 @@ for i in range(10):
 REACTIONS.append("\U0001F51F")
 
 
+def check_editable_chan():
+    async def predicate(ctx: commands.Context):
+        if len(ctx.message.channel_mentions) == 0:
+            return False
+        elif len(ctx.message.channel_mentions) > 1:
+            return False
+        elif len(ctx.message.role_mentions) == 0 and len(ctx.message.mentions) == 0:
+            return False
+        else:
+            return True
+
+    return commands.check(predicate)
+
+
+def chan_permissions(chan: GuildChannel, allow: bool):
+    if type(chan) == TextChannel:
+        return dict(read_messages=allow, send_messages=allow)
+    elif type(chan) == VoiceChannel:
+        return dict(connect=allow, speak=allow)
+    else:
+        raise BadArgument("Chan type Invalid")
+
+
 class Chan(commands.Cog):
     def __init__(self, bot: commands.Bot):
         self.bot = bot
@@ -20,10 +43,13 @@ class Chan(commands.Cog):
 
     @commands.group("chan", pass_context=True)
     @commands.guild_only()
-    async def chan(self, ctx: commands.Context, name: str):
-        if name == "help":
+    async def chan(self, ctx: commands.Context):
+        if ctx.invoked_subcommand is None:
             await ctx.invoke(self.chan_help)
-        else:
+
+    @chan.group("create", pass_context=True)
+    @commands.guild_only()
+    async def chan_create(self, ctx: commands.Context, name: str):
         chan: TextChannel = await ctx.guild.create_text_channel(name)
         if len(ctx.message.role_mentions) != 0 or len(ctx.message.mentions) != 0:
             await chan.set_permissions(ctx.guild.default_role, read_messages=False, send_messages=False)
@@ -32,13 +58,47 @@ class Chan(commands.Cog):
             for m in ctx.message.mentions:
                 await chan.set_permissions(m, read_messages=True, send_messages=True)
 
+    @chan.group("deny", pass_context=True)
+    @commands.guild_only()
+    @check_editable_chan()
+    async def chan_deny(self, ctx: commands.Context):
+        for r in ctx.message.role_mentions:
+            await ctx.message.channel_mentions[0].set_permissions(r,
+                                                                  **chan_permissions(ctx.message.channel_mentions[0],
+                                                                                     False))
+        for m in ctx.message.mentions:
+            await ctx.message.channel_mentions[0].set_permissions(m,
+                                                                  **chan_permissions(ctx.message.channel_mentions[0],
+                                                                                     False))
+
+    @chan.group("allow", pass_context=True)
+    @commands.guild_only()
+    @check_editable_chan()
+    async def allow_deny(self, ctx: commands.Context):
+        for r in ctx.message.role_mentions:
+            await ctx.message.channel_mentions[0].set_permissions(r,
+                                                                  **chan_permissions(ctx.message.channel_mentions[0],
+                                                                                     True))
+        for m in ctx.message.mentions:
+            await ctx.message.channel_mentions[0].set_permissions(m,
+                                                                  **chan_permissions(ctx.message.channel_mentions[0],
+                                                                                     True))
+
     @chan.group("help", pass_context=True)
     @commands.guild_only()
     async def chan_help(self, ctx: commands.Context):
         embed = Embed(title="chan help")
-        embed.add_field(name="chan <name> [@role|@user]",
+        embed.add_field(name="chan create <name> [@role|@user]",
                         value="Create a new chan, the roles and/or users mentioned will be the only one permitted to "
-                              "read and write in the chan\n",
+                              "read and write in the chan",
+                        inline=False)
+        embed.add_field(name="chan deny <@chan> <@role|@user>",
+                        value="Edit chan permission, the roles and/or users mentioned will be deny for read and write "
+                              "in the chan",
+                        inline=False)
+        embed.add_field(name="chan allow <@chan> <@role|@user>",
+                        value="Edit chan permission, the roles and/or users mentioned will be allow to read and write "
+                              "in the chan",
                         inline=False)
         await ctx.send(embed=embed)
 
@@ -49,7 +109,7 @@ class Chan(commands.Cog):
             if isinstance(error, CommandNotFound):
                 await ctx.message.add_reaction("\u2753")
                 await ctx.message.delete(delay=30)
-            if isinstance(error, MissingRequiredArgument):
+            if isinstance(error, MissingRequiredArgument) or isinstance(error, CheckFailure):
                 await ctx.message.add_reaction("\u274C")
                 await ctx.message.delete(delay=30)
             else: