3 files changed, 51 insertions, 3 deletions
diff --git a/bot/utils/converters.py b/bot/utils/converters.py
index 72b64848..9e9616d8 100644
--- a/bot/utils/converters.py
+++ b/bot/utils/converters.py
@@ -85,3 +85,32 @@ class DateConverter(commands.Converter):
                 f"Can't convert `{argument}` to `datetime` in format `YYYY-MM-DD` or `int` in SOL."
             )
         return date
+
+
+class Subreddit(commands.Converter):
+    """Forces a string to begin with "r/" and checks if it's a valid subreddit."""
+
+    @staticmethod
+    async def convert(ctx: commands.Context, sub: str) -> str:
+        """
+        Force sub to begin with "r/" and check if it's a valid subreddit.
+
+        If sub is a valid subreddit, return it prepended with "r/"
+        """
+        sub = sub.lower()
+
+        if not sub.startswith("r/"):
+            sub = f"r/{sub}"
+
+        resp = await ctx.bot.http_session.get(
+            "https://www.reddit.com/subreddits/search.json",
+            params={"q": sub}
+        )
+
+        json = await resp.json()
+        if not json["data"]["children"]:
+            raise commands.BadArgument(
+                f"The subreddit `{sub}` either doesn't exist, or it has no posts."
+            )
+
+        return sub
diff --git a/bot/utils/messages.py b/bot/utils/messages.py
new file mode 100644
index 00000000..a6c035f9
--- /dev/null
+++ b/bot/utils/messages.py
@@ -0,0 +1,19 @@
+import re
+from typing import Optional
+
+
+def sub_clyde(username: Optional[str]) -> Optional[str]:
+    """
+    Replace "e"/"E" in any "clyde" in `username` with a Cyrillic "е"/"E" and return the new string.
+
+    Discord disallows "clyde" anywhere in the username for webhooks. It will return a 400.
+    Return None only if `username` is None.
+    """
+    def replace_e(match: re.Match) -> str:
+        char = "е" if match[2] == "e" else "Е"
+        return match[1] + char
+
+    if username:
+        return re.sub(r"(clyd)(e)", replace_e, username, flags=re.I)
+    else:
+        return username  # Empty string or None
diff --git a/bot/utils/pagination.py b/bot/utils/pagination.py
index e0dc25b4..742281d7 100644
--- a/bot/utils/pagination.py
+++ b/bot/utils/pagination.py
@@ -4,6 +4,7 @@ from typing import Iterable, List, Optional, Tuple
 
 from discord import Embed, Member, Reaction
 from discord.abc import User
+from discord.embeds import EmptyEmbed
 from discord.ext.commands import Context, Paginator
 
 from bot.constants import Emojis
@@ -419,9 +420,8 @@ class ImagePaginator(Paginator):
             await message.edit(embed=embed)
             embed.description = paginator.pages[current_page]
 
-            image = paginator.images[current_page]
-            if image:
-                embed.set_image(url=image)
+            image = paginator.images[current_page] or EmptyEmbed
+            embed.set_image(url=image)
 
             embed.set_footer(text=f"Page {current_page + 1}/{len(paginator.pages)}")
             log.debug(f"Got {reaction_type} page reaction - changing to page {current_page + 1}/{len(paginator.pages)}")