Merge branch 'main' into fix-issue-898

6 files changed, 469 insertions, 13 deletions

diff --git a/bot/exts/events/advent_of_code/_cog.py b/bot/exts/events/advent_of_code/_cog.py
index ca60e517..7dd967ec 100644
--- a/bot/exts/events/advent_of_code/_cog.py
+++ b/bot/exts/events/advent_of_code/_cog.py
@@ -2,6 +2,7 @@ import json
 import logging
 from datetime import datetime, timedelta
 from pathlib import Path
+from typing import Optional
 
 import arrow
 import discord
@@ -12,6 +13,7 @@ from bot.constants import (
     AdventOfCode as AocConfig, Channels, Colours, Emojis, Month, Roles, WHITELISTED_CHANNELS,
 )
 from bot.exts.events.advent_of_code import _helpers
+from bot.exts.events.advent_of_code.views.dayandstarview import AoCDropdownView
 from bot.utils.decorators import InChannelCheckFailure, in_month, whitelist_override, with_role
 from bot.utils.extensions import invoke_help_command
 
@@ -150,7 +152,7 @@ class AdventOfCode(commands.Cog):
         else:
             try:
                 join_code = await _helpers.get_public_join_code(author)
-            except _helpers.FetchingLeaderboardFailed:
+            except _helpers.FetchingLeaderboardFailedError:
                 await ctx.send(":x: Failed to get join code! Notified maintainers.")
                 return
 
@@ -185,14 +187,29 @@ class AdventOfCode(commands.Cog):
         brief="Get a snapshot of the PyDis private AoC leaderboard",
     )
     @whitelist_override(channels=AOC_WHITELIST_RESTRICTED)
-    async def aoc_leaderboard(self, ctx: commands.Context) -> None:
-        """Get the current top scorers of the Python Discord Leaderboard."""
+    async def aoc_leaderboard(
+            self,
+            ctx: commands.Context,
+            day_and_star: Optional[bool] = False,
+            maximum_scorers: Optional[int] = 10
+    ) -> None:
+        """
+        Get the current top scorers of the Python Discord Leaderboard.
+
+        Additionally, you can provide an argument `day_and_star` (Boolean) to have the bot send a View
+        that will let you filter by day and star.
+        """
+        if maximum_scorers > AocConfig.max_day_and_star_results or maximum_scorers <= 0:
+            raise commands.BadArgument(
+                f"The maximum number of results you can query is {AocConfig.max_day_and_star_results}"
+            )
         async with ctx.typing():
             try:
                 leaderboard = await _helpers.fetch_leaderboard()
-            except _helpers.FetchingLeaderboardFailed:
+            except _helpers.FetchingLeaderboardFailedError:
                 await ctx.send(":x: Unable to fetch leaderboard!")
                 return
+        if not day_and_star:
 
             number_of_participants = leaderboard["number_of_participants"]
 
@@ -203,6 +220,22 @@ class AdventOfCode(commands.Cog):
             info_embed = _helpers.get_summary_embed(leaderboard)
 
             await ctx.send(content=f"{header}\n\n{table}", embed=info_embed)
+            return
+
+        # This is a dictionary that contains solvers in respect of day, and star.
+        # e.g. 1-1 means the solvers of the first star of the first day and their completion time
+        per_day_and_star = json.loads(leaderboard['leaderboard_per_day_and_star'])
+        view = AoCDropdownView(
+            day_and_star_data=per_day_and_star,
+            maximum_scorers=maximum_scorers,
+            original_author=ctx.author
+        )
+        message = await ctx.send(
+            content="Please select a day and a star to filter by!",
+            view=view
+        )
+        await view.wait()
+        await message.edit(view=None)
 
     @in_month(Month.DECEMBER)
     @adventofcode_group.command(
@@ -231,7 +264,7 @@ class AdventOfCode(commands.Cog):
         """Send an embed with daily completion statistics for the Python Discord leaderboard."""
         try:
             leaderboard = await _helpers.fetch_leaderboard()
-        except _helpers.FetchingLeaderboardFailed:
+        except _helpers.FetchingLeaderboardFailedError:
             await ctx.send(":x: Can't fetch leaderboard for stats right now!")
             return
 
@@ -267,7 +300,7 @@ class AdventOfCode(commands.Cog):
         async with ctx.typing():
             try:
                 await _helpers.fetch_leaderboard(invalidate_cache=True)
-            except _helpers.FetchingLeaderboardFailed:
+            except _helpers.FetchingLeaderboardFailedError:
                 await ctx.send(":x: Something went wrong while trying to refresh the cache!")
             else:
                 await ctx.send("\N{OK Hand Sign} Refreshed leaderboard cache!")
diff --git a/bot/exts/events/advent_of_code/_helpers.py b/bot/exts/events/advent_of_code/_helpers.py
index 5fedb60f..af64bc81 100644
--- a/bot/exts/events/advent_of_code/_helpers.py
+++ b/bot/exts/events/advent_of_code/_helpers.py
@@ -105,6 +105,7 @@ def _parse_raw_leaderboard_data(raw_leaderboard_data: dict) -> dict:
     # The data we get from the AoC website is structured by member, not by day/star,
     # which means we need to iterate over the members to transpose the data to a per
     # star view. We need that per star view to compute rank scores per star.
+    per_day_star_stats = collections.defaultdict(list)
     for member in raw_leaderboard_data.values():
         name = member["name"] if member["name"] else f"Anonymous #{member['id']}"
         member_id = member["id"]
@@ -122,6 +123,11 @@ def _parse_raw_leaderboard_data(raw_leaderboard_data: dict) -> dict:
                 star_results[(day, star)].append(
                     StarResult(member_id=member_id, completion_time=completion_time)
                 )
+                per_day_star_stats[f"{day}-{star}"].append(
+                    {'completion_time': int(data["get_star_ts"]), 'member_name': name}
+                )
+    for key in per_day_star_stats:
+        per_day_star_stats[key] = sorted(per_day_star_stats[key], key=operator.itemgetter('completion_time'))
 
     # Now that we have a transposed dataset that holds the completion time of all
     # participants per star, we can compute the rank-based scores each participant
@@ -151,7 +157,7 @@ def _parse_raw_leaderboard_data(raw_leaderboard_data: dict) -> dict:
         # this data to JSON in order to cache it in Redis.
         daily_stats[day] = {"star_one": star_one, "star_two": star_two}
 
-    return {"daily_stats": daily_stats, "leaderboard": sorted_leaderboard}
+    return {"daily_stats": daily_stats, "leaderboard": sorted_leaderboard, 'per_day_and_star': per_day_star_stats}
 
 
 def _format_leaderboard(leaderboard: dict[str, dict]) -> str:
@@ -289,6 +295,7 @@ async def fetch_leaderboard(invalidate_cache: bool = False) -> dict:
             "leaderboard_fetched_at": leaderboard_fetched_at,
             "number_of_participants": number_of_participants,
             "daily_stats": json.dumps(parsed_leaderboard_data["daily_stats"]),
+            "leaderboard_per_day_and_star": json.dumps(parsed_leaderboard_data["per_day_and_star"])
         }
 
         # Store the new values in Redis
diff --git a/bot/exts/events/advent_of_code/views/dayandstarview.py b/bot/exts/events/advent_of_code/views/dayandstarview.py
new file mode 100644
index 00000000..243db32e
--- /dev/null
+++ b/bot/exts/events/advent_of_code/views/dayandstarview.py
@@ -0,0 +1,71 @@
+from datetime import datetime
+
+import discord
+
+AOC_DAY_AND_STAR_TEMPLATE = "{rank: >4} | {name:25.25} | {completion_time: >10}"
+
+
+class AoCDropdownView(discord.ui.View):
+    """Interactive view to filter AoC stats by Day and Star."""
+
+    def __init__(self, original_author: discord.Member, day_and_star_data: dict[str: dict], maximum_scorers: int):
+        super().__init__()
+        self.day = 0
+        self.star = 0
+        self.data = day_and_star_data
+        self.maximum_scorers = maximum_scorers
+        self.original_author = original_author
+
+    def generate_output(self) -> str:
+        """Generates a formatted codeblock with AoC statistics based on the currently selected day and star."""
+        header = AOC_DAY_AND_STAR_TEMPLATE.format(
+            rank="Rank",
+            name="Name", completion_time="Completion time (UTC)"
+        )
+        lines = [f"{header}\n{'-' * (len(header) + 2)}"]
+
+        for rank, scorer in enumerate(self.data[f"{self.day}-{self.star}"][:self.maximum_scorers]):
+            time_data = datetime.fromtimestamp(scorer['completion_time']).strftime("%I:%M:%S %p")
+            lines.append(AOC_DAY_AND_STAR_TEMPLATE.format(
+                datastamp="",
+                rank=rank + 1,
+                name=scorer['member_name'],
+                completion_time=time_data)
+            )
+        joined_lines = "\n".join(lines)
+        return f"Statistics for Day: {self.day}, Star: {self.star}.\n ```\n{joined_lines}\n```"
+
+    async def interaction_check(self, interaction: discord.Interaction) -> bool:
+        """Global check to ensure that the interacting user is the user who invoked the command originally."""
+        return interaction.user == self.original_author
+
+    @discord.ui.select(
+        placeholder="Day",
+        options=[discord.SelectOption(label=str(i)) for i in range(1, 26)],
+        custom_id="day_select"
+    )
+    async def day_select(self, select: discord.ui.Select, interaction: discord.Interaction) -> None:
+        """Dropdown to choose a Day of the AoC."""
+        self.day = select.values[0]
+
+    @discord.ui.select(
+        placeholder="Star",
+        options=[discord.SelectOption(label=str(i)) for i in range(1, 3)],
+        custom_id="star_select"
+    )
+    async def star_select(self, select: discord.ui.Select, interaction: discord.Interaction) -> None:
+        """Dropdown to choose either the first or the second star."""
+        self.star = select.values[0]
+
+    @discord.ui.button(label="Fetch", style=discord.ButtonStyle.blurple)
+    async def fetch(self, button: discord.ui.Button, interaction: discord.Interaction) -> None:
+        """Button that fetches the statistics based on the dropdown values."""
+        if self.day == 0 or self.star == 0:
+            await interaction.response.send_message(
+                "You have to select a value from both of the dropdowns!",
+                ephemeral=True
+            )
+        else:
+            await interaction.response.edit_message(content=self.generate_output())
+            self.day = 0
+            self.star = 0
diff --git a/bot/exts/events/hacktoberfest/hacktober-issue-finder.py b/bot/exts/events/hacktoberfest/hacktober-issue-finder.py
index 088e7e43..1774564b 100644
--- a/bot/exts/events/hacktoberfest/hacktober-issue-finder.py
+++ b/bot/exts/events/hacktoberfest/hacktober-issue-finder.py
@@ -100,7 +100,8 @@ class HacktoberIssues(commands.Cog):
         """Format the issue data into a embed."""
         title = issue["title"]
         issue_url = issue["url"].replace("api.", "").replace("/repos/", "/")
-        body = issue["body"]
+        # issues can have empty bodies, which in that case GitHub doesn't include the key in the API response
+        body = issue.get("body", "")
         labels = [label["name"] for label in issue["labels"]]
 
         embed = discord.Embed(title=title)
diff --git a/bot/exts/utilities/challenges.py b/bot/exts/utilities/challenges.py
new file mode 100644
index 00000000..234eb0be
--- /dev/null
+++ b/bot/exts/utilities/challenges.py
@@ -0,0 +1,335 @@
+import logging
+from asyncio import to_thread
+from random import choice
+from typing import Union
+
+from bs4 import BeautifulSoup
+from discord import Embed, Interaction, SelectOption, ui
+from discord.ext import commands
+
+from bot.bot import Bot
+from bot.constants import Colours, Emojis, NEGATIVE_REPLIES
+
+log = logging.getLogger(__name__)
+API_ROOT = "https://www.codewars.com/api/v1/code-challenges/{kata_id}"
+
+# Map difficulty for the kata to color we want to display in the embed.
+# These colors are representative of the colors that each kyu's level represents on codewars.com
+MAPPING_OF_KYU = {
+    8: 0xdddbda, 7: 0xdddbda, 6: 0xecb613, 5: 0xecb613,
+    4: 0x3c7ebb, 3: 0x3c7ebb, 2: 0x866cc7, 1: 0x866cc7
+}
+
+# Supported languages for a kata on codewars.com
+SUPPORTED_LANGUAGES = {
+    "stable": [
+        "c", "c#", "c++", "clojure", "coffeescript", "coq", "crystal", "dart", "elixir",
+        "f#", "go", "groovy", "haskell", "java", "javascript", "kotlin", "lean", "lua", "nasm",
+        "php", "python", "racket", "ruby", "rust", "scala", "shell", "sql", "swift", "typescript"
+    ],
+    "beta": [
+        "agda", "bf", "cfml", "cobol", "commonlisp", "elm", "erlang", "factor",
+        "forth", "fortran", "haxe", "idris", "julia", "nim", "objective-c", "ocaml",
+        "pascal", "perl", "powershell", "prolog", "purescript", "r", "raku", "reason", "solidity", "vb.net"
+    ]
+}
+
+
+class InformationDropdown(ui.Select):
+    """A dropdown inheriting from ui.Select that allows finding out other information about the kata."""
+
+    def __init__(self, language_embed: Embed, tags_embed: Embed, other_info_embed: Embed, main_embed: Embed):
+        options = [
+            SelectOption(
+                label="Main Information",
+                description="See the kata's difficulty, description, etc.",
+                emoji="🌎"
+            ),
+            SelectOption(
+                label="Languages",
+                description="See what languages this kata supports!",
+                emoji=Emojis.reddit_post_text
+            ),
+            SelectOption(
+                label="Tags",
+                description="See what categories this kata falls under!",
+                emoji=Emojis.stackoverflow_tag
+            ),
+            SelectOption(
+                label="Other Information",
+                description="See how other people performed on this kata and more!",
+                emoji="ℹ"
+            )
+        ]
+
+        # We map the option label to the embed instance so that it can be easily looked up later in O(1)
+        self.mapping_of_embeds = {
+            "Main Information": main_embed,
+            "Languages": language_embed,
+            "Tags": tags_embed,
+            "Other Information": other_info_embed,
+        }
+
+        super().__init__(
+            placeholder="See more information regarding this kata",
+            min_values=1,
+            max_values=1,
+            options=options
+        )
+
+    async def callback(self, interaction: Interaction) -> None:
+        """Callback for when someone clicks on a dropdown."""
+        # Edit the message to the embed selected in the option
+        # The `original_message` attribute is set just after the message is sent with the view.
+        # The attribute is not set during initialization.
+        result_embed = self.mapping_of_embeds[self.values[0]]
+        await self.original_message.edit(embed=result_embed)
+
+
+class Challenges(commands.Cog):
+    """
+    Cog for the challenge command.
+
+    The challenge command pulls a random kata from codewars.com.
+    A kata is the name for a challenge, specific to codewars.com.
+
+    The challenge command also has filters to customize the kata that is given.
+    You can specify the language the kata should be from, difficulty and topic of the kata.
+    """
+
+    def __init__(self, bot: Bot):
+        self.bot = bot
+
+    async def kata_id(self, search_link: str, params: dict) -> Union[str, Embed]:
+        """
+        Uses bs4 to get the HTML code for the page of katas, where the page is the link of the formatted `search_link`.
+
+        This will webscrape the search page with `search_link` and then get the ID of a kata for the
+        codewars.com API to use.
+        """
+        async with self.bot.http_session.get(search_link, params=params) as response:
+            if response.status != 200:
+                error_embed = Embed(
+                    title=choice(NEGATIVE_REPLIES),
+                    description="We ran into an error when getting the kata from codewars.com, try again later.",
+                    color=Colours.soft_red
+                )
+                log.error(f"Unexpected response from codewars.com, status code: {response.status}")
+                return error_embed
+
+            soup = BeautifulSoup(await response.text(), features="lxml")
+            first_kata_div = await to_thread(soup.find_all, "div", class_="item-title px-0")
+
+            if not first_kata_div:
+                raise commands.BadArgument("No katas could be found with the filters provided.")
+            elif len(first_kata_div) >= 3:
+                first_kata_div = choice(first_kata_div[:3])
+            elif "q=" not in search_link:
+                first_kata_div = choice(first_kata_div)
+            else:
+                first_kata_div = first_kata_div[0]
+
+            # There are numerous divs before arriving at the id of the kata, which can be used for the link.
+            first_kata_id = first_kata_div.a["href"].split("/")[-1]
+            return first_kata_id
+
+    async def kata_information(self, kata_id: str) -> Union[dict, Embed]:
+        """
+        Returns the information about the Kata.
+
+        Uses the codewars.com API to get information about the kata using `kata_id`.
+        """
+        async with self.bot.http_session.get(API_ROOT.format(kata_id=kata_id)) as response:
+            if response.status != 200:
+                error_embed = Embed(
+                    title=choice(NEGATIVE_REPLIES),
+                    description="We ran into an error when getting the kata information, try again later.",
+                    color=Colours.soft_red
+                )
+                log.error(f"Unexpected response from codewars.com/api/v1, status code: {response.status}")
+                return error_embed
+
+            return await response.json()
+
+    @staticmethod
+    def main_embed(kata_information: dict) -> Embed:
+        """Creates the main embed which displays the name, difficulty and description of the kata."""
+        kata_description = kata_information["description"]
+        kata_url = f"https://codewars.com/kata/{kata_information['id']}"
+
+        # Ensuring it isn't over the length 1024
+        if len(kata_description) > 1024:
+            kata_description = "\n".join(kata_description[:1000].split("\n")[:-1]) + "..."
+            kata_description += f" [continue reading]({kata_url})"
+
+        kata_embed = Embed(
+            title=kata_information["name"],
+            description=kata_description,
+            color=MAPPING_OF_KYU[int(kata_information["rank"]["name"].replace(" kyu", ""))],
+            url=kata_url
+        )
+        kata_embed.add_field(name="Difficulty", value=kata_information["rank"]["name"], inline=False)
+        return kata_embed
+
+    @staticmethod
+    def language_embed(kata_information: dict) -> Embed:
+        """Creates the 'language embed' which displays all languages the kata supports."""
+        kata_url = f"https://codewars.com/kata/{kata_information['id']}"
+
+        languages = "\n".join(map(str.title, kata_information["languages"]))
+        language_embed = Embed(
+            title=kata_information["name"],
+            description=f"```yaml\nSupported Languages:\n{languages}\n```",
+            color=Colours.python_blue,
+            url=kata_url
+        )
+        return language_embed
+
+    @staticmethod
+    def tags_embed(kata_information: dict) -> Embed:
+        """
+        Creates the 'tags embed' which displays all the tags of the Kata.
+
+        Tags explain what the kata is about, this is what codewars.com calls categories.
+        """
+        kata_url = f"https://codewars.com/kata/{kata_information['id']}"
+
+        tags = "\n".join(kata_information["tags"])
+        tags_embed = Embed(
+            title=kata_information["name"],
+            description=f"```yaml\nTags:\n{tags}\n```",
+            color=Colours.grass_green,
+            url=kata_url
+        )
+        return tags_embed
+
+    @staticmethod
+    def miscellaneous_embed(kata_information: dict) -> Embed:
+        """
+        Creates the 'other information embed' which displays miscellaneous information about the kata.
+
+        This embed shows statistics such as the total number of people who completed the kata,
+        the total number of stars of the kata, etc.
+        """
+        kata_url = f"https://codewars.com/kata/{kata_information['id']}"
+
+        embed = Embed(
+            title=kata_information["name"],
+            description="```nim\nOther Information\n```",
+            color=Colours.grass_green,
+            url=kata_url
+        )
+        embed.add_field(
+            name="`Total Score`",
+            value=f"```css\n{kata_information['voteScore']}\n```",
+            inline=False
+        )
+        embed.add_field(
+            name="`Total Stars`",
+            value=f"```css\n{kata_information['totalStars']}\n```",
+            inline=False
+        )
+        embed.add_field(
+            name="`Total Completed`",
+            value=f"```css\n{kata_information['totalCompleted']}\n```",
+            inline=False
+        )
+        embed.add_field(
+            name="`Total Attempts`",
+            value=f"```css\n{kata_information['totalAttempts']}\n```",
+            inline=False
+        )
+        return embed
+
+    @staticmethod
+    def create_view(dropdown: InformationDropdown, link: str) -> ui.View:
+        """
+        Creates the discord.py View for the Discord message components (dropdowns and buttons).
+
+        The discord UI is implemented onto the embed, where the user can choose what information about the kata they
+        want, along with a link button to the kata itself.
+        """
+        view = ui.View()
+        view.add_item(dropdown)
+        view.add_item(ui.Button(label="View the Kata", url=link))
+        return view
+
+    @commands.command(aliases=["kata"])
+    @commands.cooldown(1, 5, commands.BucketType.user)
+    async def challenge(self, ctx: commands.Context, language: str = "python", *, query: str = None) -> None:
+        """
+        The challenge command pulls a random kata (challenge) from codewars.com.
+
+        The different ways to use this command are:
+        `.challenge <language>` - Pulls a random challenge within that language's scope.
+        `.challenge <language> <difficulty>` - The difficulty can be from 1-8,
+        1 being the hardest, 8 being the easiest. This pulls a random challenge within that difficulty & language.
+        `.challenge <language> <query>` - Pulls a random challenge with the query provided under the language
+        `.challenge <language> <query>, <difficulty>` - Pulls a random challenge with the query provided,
+        under that difficulty within the language's scope.
+        """
+        if language.lower() not in SUPPORTED_LANGUAGES["stable"] + SUPPORTED_LANGUAGES["beta"]:
+            raise commands.BadArgument("This is not a recognized language on codewars.com!")
+
+        get_kata_link = f"https://codewars.com/kata/search/{language}"
+        params = {}
+
+        if language and not query:
+            level = f"-{choice([1, 2, 3, 4, 5, 6, 7, 8])}"
+            params["r[]"] = level
+        elif "," in query:
+            query_splitted = query.split("," if ", " not in query else ", ")
+
+            if len(query_splitted) > 2:
+                raise commands.BadArgument(
+                    "There can only be one comma within the query, separating the difficulty and the query itself."
+                )
+
+            query, level = query_splitted
+            params["q"] = query
+            params["r[]"] = f"-{level}"
+        elif query.isnumeric():
+            params["r[]"] = f"-{query}"
+        else:
+            params["q"] = query
+
+        params["beta"] = str(language in SUPPORTED_LANGUAGES["beta"]).lower()
+
+        first_kata_id = await self.kata_id(get_kata_link, params)
+        if isinstance(first_kata_id, Embed):
+            # We ran into an error when retrieving the website link
+            await ctx.send(embed=first_kata_id)
+            return
+
+        kata_information = await self.kata_information(first_kata_id)
+        if isinstance(kata_information, Embed):
+            # Something went wrong when trying to fetch the kata information
+            await ctx.d(embed=kata_information)
+            return
+
+        kata_embed = self.main_embed(kata_information)
+        language_embed = self.language_embed(kata_information)
+        tags_embed = self.tags_embed(kata_information)
+        miscellaneous_embed = self.miscellaneous_embed(kata_information)
+
+        dropdown = InformationDropdown(
+            main_embed=kata_embed,
+            language_embed=language_embed,
+            tags_embed=tags_embed,
+            other_info_embed=miscellaneous_embed
+        )
+        kata_view = self.create_view(dropdown, f"https://codewars.com/kata/{first_kata_id}")
+        original_message = await ctx.send(
+            embed=kata_embed,
+            view=kata_view
+        )
+        dropdown.original_message = original_message
+
+        wait_for_kata = await kata_view.wait()
+        if wait_for_kata:
+            await original_message.edit(embed=kata_embed, view=None)
+
+
+def setup(bot: Bot) -> None:
+    """Load the Challenges cog."""
+    bot.add_cog(Challenges(bot))
diff --git a/bot/exts/utilities/issues.py b/bot/exts/utilities/issues.py
index 8a7ebed0..36655e1b 100644
--- a/bot/exts/utilities/issues.py
+++ b/bot/exts/utilities/issues.py
@@ -185,7 +185,7 @@ class Issues(commands.Cog):
         return resp
 
     @whitelist_override(channels=WHITELISTED_CHANNELS, categories=WHITELISTED_CATEGORIES)
-    @commands.command(aliases=("pr",))
+    @commands.command(aliases=("issues", "pr", "prs"))
     async def issue(
         self,
         ctx: commands.Context,
@@ -197,14 +197,23 @@ class Issues(commands.Cog):
         # Remove duplicates
         numbers = set(numbers)
 
-        if len(numbers) > MAXIMUM_ISSUES:
-            embed = discord.Embed(
+        err_message = None
+        if not numbers:
+            err_message = "You must have at least one issue/PR!"
+
+        elif len(numbers) > MAXIMUM_ISSUES:
+            err_message = f"Too many issues/PRs! (maximum of {MAXIMUM_ISSUES})"
+
+        # If there's an error with command invocation then send an error embed
+        if err_message is not None:
+            err_embed = discord.Embed(
                 title=random.choice(ERROR_REPLIES),
                 color=Colours.soft_red,
-                description=f"Too many issues/PRs! (maximum of {MAXIMUM_ISSUES})"
+                description=err_message
             )
-            await ctx.send(embed=embed)
+            await ctx.send(embed=err_embed)
             await invoke_help_command(ctx)
+            return
 
         results = [await self.fetch_issues(number, repository, user) for number in numbers]
         await ctx.send(embed=self.format_embed(results, user, repository))