Added encryption

cogs/fun/encryption.py

@@ -0,0 +1,34 @@
+import discord
+from discord.ext import commands
+from util import embed
+
+class Encryption(commands.Cog):
+    def __init__(self, client: discord.Client):
+        self.client = client
+    
+    @commands.command(name="rot", description="Applies the ROT encryption", usage="rot [number] [message]")
+    @commands.cooldown(1, 2)
+    async def rot(self, ctx: commands.Context, shift: str, *message: str):
+        if not shift.isnumeric():
+            await ctx.send(embed=embed.make_error_embed(f"{shift} is not a number."))
+            return
+
+        shift = int(shift)
+        if (shift < 1) or (shift > 25):
+            await ctx.send(embed=embed.make_error_embed("That's too much rotation. Stop it."))
+            return
+        
+        old_message = list(' '.join(message))
+        for i in range(0, len(old_message)):
+            if not old_message[i].isalpha():
+                continue
+
+            if old_message[i].isupper():
+                old_message[i] = chr(ord('A') + ((ord(old_message[i]) + shift - ord('A')) % 26))
+            else:
+                old_message[i] = chr(ord('a') + ((ord(old_message[i]) + shift - ord('a')) % 26))
+
+        await ctx.send(''.join(old_message))
+
+def setup(client: discord.Client):
+    client.add_cog(Encryption(client))