Make a new misc games cog for smaller games, and add shiritori to it

cogs/games.py

@@ -0,0 +1,70 @@
+from discord.ext import commands
+
+import utils
+
+
+class Games(commands.Cog):
+
+    @commands.guild_only()
+    @utils.can_run(send_messages=True)
+    @commands.command(aliases=["word_chain"])
+    async def shiritori(self, ctx, *, start_word):
+        """
+        Starts a game of Shiritori, in which the last letter of the last word given
+        has to be the first letter of the next word given. For example, if the word given is
+        apple, then the next word can be elephant because apple ends in e and elephant begins in e
+
+        The last player who entered a word cannot be the next person who enters a word
+        """
+        def grab_letter(word, last=True):
+            iterator = reversed(word) if last else iter(word)
+
+            for char in iterator:
+                if char.isalpha():
+                    return char
+
+        def check(message):
+            # Ensure it's in the same channel
+            if message.channel != ctx.channel:
+                return False
+            # Ensure we aren't listening to a bot (like ourselves for example)
+            elif message.author.bot:
+                return False
+            # The last person who gave a message cannot be the next one as well
+            elif last_author is not None and message.author == last_author:
+                return False
+            else:
+                return True
+
+        # The info for the last word used
+        last_word = start_word
+        last_letter = grab_letter(start_word)
+        last_author = ctx.author
+        words_used = [start_word]
+
+        # Add the reaction to the first message, to show we've started
+        await ctx.message.add_reaction("✅")
+
+        while True:
+            message = await ctx.bot.wait_for("message", check=check)
+
+            # Grab the first letter of this new word
+            first_letter = grab_letter(message.content, last=False)
+
+            if first_letter != last_letter:
+                break
+
+            # As long as we got a valid message, and the letter matches, then we're all good. Continue on
+            last_word = message.content
+            last_letter = grab_letter(message.content)
+            last_author = message.author
+            words_used.append(last_word)
+            await message.add_reaction("✅")
+
+        # If we're here, game over, someone messed up
+        await message.add_reaction("❌")
+        await ctx.send(f"Wrong! {message.author.mention} is a loser!")
+
+
+def setup(bot):
+    bot.add_cog(Games())