From 8c1c94a2748da1beeeae43f028f11abf64bef276 Mon Sep 17 00:00:00 2001
From: Dustin Pianalto <dustin@djpianalto.com>
Date: Sun, 15 Dec 2019 22:46:05 -0900
Subject: [PATCH] Add functionality for prefixes to be case insensitive

---
 geeksbot/imports/geeksbot.py | 73 ++++++++++++++++++++++++++++++++++++
 geeksbot/imports/strings.py  | 11 ++++++
 2 files changed, 84 insertions(+)
 create mode 100644 geeksbot/imports/strings.py

diff --git a/geeksbot/imports/geeksbot.py b/geeksbot/imports/geeksbot.py
index bb3656c..7e881de 100644
--- a/geeksbot/imports/geeksbot.py
+++ b/geeksbot/imports/geeksbot.py
@@ -6,6 +6,8 @@ import logging
 
 import discord
 from discord.ext import commands
+from discord.ext.commands.context import Context
+from geeksbot.imports.strings import MyStringView
 import redis
 import aiohttp
 
@@ -69,6 +71,77 @@ class Geeksbot(commands.Bot):
     async def get_prefixes(self, bot, message):
         return self.default_prefix.casefold()
 
+    async def get_context(self, message, *, cls=Context):
+        r"""|coro|
+
+        Returns the invocation context from the message.
+
+        This is a more low-level counter-part for :meth:`.process_commands`
+        to allow users more fine grained control over the processing.
+
+        The returned context is not guaranteed to be a valid invocation
+        context, :attr:`.Context.valid` must be checked to make sure it is.
+        If the context is not valid then it is not a valid candidate to be
+        invoked under :meth:`~.Bot.invoke`.
+
+        Parameters
+        -----------
+        message: :class:`discord.Message`
+            The message to get the invocation context from.
+        cls
+            The factory class that will be used to create the context.
+            By default, this is :class:`.Context`. Should a custom
+            class be provided, it must be similar enough to :class:`.Context`\'s
+            interface.
+
+        Returns
+        --------
+        :class:`.Context`
+            The invocation context. The type of this can change via the
+            ``cls`` parameter.
+        """
+
+        view = MyStringView(message.content)
+        ctx = cls(prefix=None, view=view, bot=self, message=message)
+
+        if self._skip_check(message.author.id, self.user.id):
+            return ctx
+
+        prefix = await self.get_prefix(message)
+        invoked_prefix = prefix
+
+        if isinstance(prefix, str):
+            if not view.skip_string(prefix):
+                return ctx
+        else:
+            try:
+                # if the context class' __init__ consumes something from the view this
+                # will be wrong.  That seems unreasonable though.
+                if message.content.casefold().startswith(tuple(prefix)):
+                    invoked_prefix = discord.utils.find(view.skip_string, prefix)
+                else:
+                    return ctx
+
+            except TypeError:
+                if not isinstance(prefix, list):
+                    raise TypeError("get_prefix must return either a string or a list of string, "
+                                    "not {}".format(prefix.__class__.__name__))
+
+                # It's possible a bad command_prefix got us here.
+                for value in prefix:
+                    if not isinstance(value, str):
+                        raise TypeError("Iterable command_prefix or list returned from get_prefix must "
+                                        "contain only strings, not {}".format(value.__class__.__name__))
+
+                # Getting here shouldn't happen
+                raise
+
+        invoker = view.get_word()
+        ctx.invoked_with = invoker
+        ctx.prefix = invoked_prefix
+        ctx.command = self.all_commands.get(invoker)
+        return ctx
+
     async def close(self):
         try:
             await super().close()
diff --git a/geeksbot/imports/strings.py b/geeksbot/imports/strings.py
new file mode 100644
index 0000000..2d4a53b
--- /dev/null
+++ b/geeksbot/imports/strings.py
@@ -0,0 +1,11 @@
+from discord.ext.commands.view import StringView
+
+
+class MyStringView(StringView):
+    def skip_string(self, string):
+        strlen = len(string)
+        if self.buffer[self.index:self.index + strlen].casefold() == string:
+            self.previous = self.index
+            self.index += strlen
+            return True
+        return False