Error handling (#18)

## Popis:
Spravení error handlingu z 
```py
if error_handling(answers):
            return await message.edit(embed=PollEmbedBase(error_handling(answers)))
```
na 
```py
if len(answer) > Poll.MAX_OPTIONS:
        raise TooManyOptionsError(f"Zadal jsi příliš mnoho odpovědí, můžeš maximálně {Poll.MAX_OPTIONS}!")
```        

## Proč?
Zvýšení čtitelnosti, jednodušší práce s error handlingem a přehlednost.

## Co dodělat?

- [x] #16

.github/workflows/.pre-commit-config.yaml

@@ -0,0 +1,25 @@
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Set up CPython
+      uses: actions/setup-python@v4
+
+    - name: Install dependencies
+      id: install-deps
+      run: |
+          python -m pip install --upgrade pip setuptools wheel ruff 
+    
+    - name: Black format
+      uses: psf/black@stable
+
+    - name: Ruff Check
+      run: ruff check .
+
+
+

cogs/error.py

@@ -1,48 +1,58 @@
-import logging
-
+from discord import Interaction
+from discord.app_commands import CommandInvokeError
 from discord.ext import commands
+from loguru import logger
+
+from src.ui.embeds import ErrorMessage
 
 
 class Error(commands.Cog):
     """Basic class for catching errors and sending a message"""
 
     def __init__(self, bot):
         self.bot = bot
-
-        self.logger = logging.getLogger("discord")
-        handler = logging.FileHandler(
-            filename="discord.log",
-            encoding="utf-8",
-            mode="w",
-        )
-        handler.setFormatter(
-            logging.Formatter("%(asctime)s:%(levelname)s:%(name)s: %(message)s"),
-        )
-        self.logger.addHandler(handler)
+        tree = self.bot.tree
+        self._old_tree_error = tree.on_error
+        tree.on_error = self.on_app_command_error
 
     @commands.Cog.listener()
-    async def on_command_error(
-            self,
-            ctx: commands.Context,
-            error: commands.CommandError,
-    ):
+    async def on_app_command_error(self, interaction: Interaction, error: Exception):
         match error:
-            case commands.MissingPermissions():
-                return await ctx.send("Chybí ti požadovaná práva!")
-
-            case commands.CommandNotFound():
-                return None
-
+            case PrettyError():
+                # if I use only 'error', gives me NoneType. Solved by this
+                logger.error(f"{error.__class__.__name__}: {interaction.command.name}")
+                await error.send()
             case _:
-                self.logger.critical(
-                    f"{ctx.message.id}, {ctx.message.content} | {error}",
+                logger.critical(error)
+                await interaction.response.send_message(
+                    embed=ErrorMessage(
+                        "Tato zpráva by se nikdy zobrazit správně neměla. "
+                        "Jsi borec, že jsi mi dokázal rozbít Jáchyma, nechceš mi o tom napsat do issues na githubu?"
+                    )
                 )
-                print(error)
-                return None
 
-    @commands.Cog.listener()
-    async def on_command(self, ctx: commands.Context):
-        self.logger.info(f"{ctx.message.id} {ctx.message.content}")
+
+class PrettyError(CommandInvokeError):
+    """Pretty errors useful for raise keyword"""
+
+    def __init__(self, message: str, interaction: Interaction, inner_exception: Exception | None = None):
+        super().__init__(interaction.command, inner_exception)
+        self.message = message
+        self.interaction = interaction
+
+    async def send(self):
+        if not self.interaction.response.is_done():
+            await self.interaction.response.send_message(embed=ErrorMessage(self.message))
+        else:
+            await self.interaction.followup.send(embed=ErrorMessage(self.message))
+
+
+class TooManyOptionsError(PrettyError):
+    pass
+
+
+class TooFewOptionsError(PrettyError):
+    pass
 
 
 async def setup(bot):

cogs/morserovka.py

@@ -4,7 +4,6 @@
 from discord import Message, app_commands
 from discord.ext import commands
 
-
 # Klasická morseovka
 
 
@@ -81,10 +80,7 @@ async def zasifruj(self, interaction: discord.Interaction, message: str) -> Mess
     @app_commands.command(name="desifruj", description="Dešifruj text z morserovky!")
     @app_commands.describe(message="Věta nebo slovo pro dešifrování")
     async def desifruj(self, interaction: discord.Interaction, message: str) -> Message:
-        decipher = "".join(
-            self.REVERSED_MORSE_CODE_DICT.get(letter)
-            for letter in re.split(r"\/|\\|\|", message)
-        )
+        decipher = "".join(self.REVERSED_MORSE_CODE_DICT.get(letter) for letter in re.split(r"\/|\\|\|", message))
         return await interaction.response.send_message(decipher)
 
 

cogs/poll_command.py

@@ -2,36 +2,51 @@
 
 import discord
 from discord import app_commands
+from discord.app_commands import Transform, Transformer
 from discord.ext import commands
 from loguru import logger
 
+from cogs.error import TooFewOptionsError, TooManyOptionsError
 from src.db_folder.databases import PollDatabase, VoteButtonDatabase
 from src.jachym import Jachym
 from src.ui.embeds import PollEmbed, PollEmbedBase
 from src.ui.poll import Poll
 from src.ui.poll_view import PollView
 
 
-def error_handling(answer: list[str]) -> str:
-    if len(answer) > Poll.MAX_OPTIONS:
-        return f"Zadal jsi příliš mnoho odpovědí, můžeš maximálně {Poll.MAX_OPTIONS}!"
-    return f"Zadal jsi příliš málo odpovědí, můžeš alespoň {Poll.MIN_OPTIONS}!"
+class OptionsTransformer(Transformer):
+    async def transform(
+        self, interaction: discord.Interaction, option: str
+    ) -> TooManyOptionsError | TooFewOptionsError | list[str]:
+        """
+        Transformer method to transformate a single string to multiple options. If they are not within parameters,
+        raises an error, else returns options.
 
+        Parameters
+        ----------
+            interaction: discord.Interaction
+            option: str
+
+        Returns
+        -------
+            List of strings
+
+        Raises:
+        -------
+            TooManyOptionsError, TooFewOptionsError
+
+        """
+        answers = [option for option in re.split('"|"|“|„', option) if option.strip()]
+        if len(answers) > Poll.MAX_OPTIONS:
+            msg = f"Zadal jsi příliš mnoho odpovědí, můžeš maximálně {Poll.MAX_OPTIONS}!"
+            raise TooManyOptionsError(msg, interaction)
+        if len(answers) < Poll.MIN_OPTIONS:
+            msg = f"Zadal jsi příliš málo odpovědí, můžeš alespoň {Poll.MIN_OPTIONS}!"
+            raise TooFewOptionsError(msg, interaction)
+        return answers
 
-class PollCreate(commands.Cog):
-    POLL_PARAMETERS = {
-        "name": "anketa",
-        "description": "Anketa pro hlasování. Jsou vidět všichni hlasovatelé.",
-        "question": "Otázka, na kterou potřebuješ vědět odpověď",
-        "answer": 'Odpovědi, rozděluješ odpovědi uvozovkou ("), maximálně pouze 10 možností',
-        "help": """
-            Jednoduchá anketa, která obsahuje otázku a odpovědi. Povoleno je 10 možností.
-            """,
-    }
-
-    # Bugfix for iPhone users who have different font for aposthrofe
-    REGEX_PATTERN = ['"', "”", "“", "„"]
 
+class PollCreate(commands.Cog):
     def __init__(self, bot: Jachym):
         self.bot = bot
 
@@ -45,29 +60,19 @@ def __init__(self, bot: Jachym):
         answer='Odpovědi, rozděluješ odpovědi uvozovkou ("), maximálně pouze 10 možností',
     )
     async def pool(
-            self,
-            interaction: discord.Interaction,
-            question: str,
-            answer: str,
+        self,
+        interaction: discord.Interaction,
+        question: str,
+        answer: Transform[list[str, ...], OptionsTransformer],
     ) -> discord.Message:
-        await interaction.response.send_message(
-            embed=PollEmbedBase("Dělám na tom, vydrž!"),
-        )
+        await interaction.response.send_message(embed=PollEmbedBase("Nahrávám anketu..."))
         message = await interaction.original_response()
 
-        answers = [
-            answer
-            for answer in re.split("|".join(self.REGEX_PATTERN), answer)
-            if answer.strip()
-        ]
-        if error_handling(answers):
-            return await message.edit(embed=PollEmbedBase(error_handling(answers)))
-
         poll = Poll(
             message_id=message.id,
             channel_id=message.channel.id,
             question=question,
-            options=answers,
+            options=answer,
             user_id=interaction.user.id,
         )
 

cogs/sync_command.py

@@ -16,10 +16,10 @@ def __init__(self, bot: "Jachym"):
     @commands.guild_only()
     @commands.is_owner()
     async def sync(
-            self,
-            ctx: Context,
-            guilds: Greedy[discord.Guild],
-            spec: Literal["-", "*", "^"] | None = None,
+        self,
+        ctx: Context,
+        guilds: Greedy[discord.Guild],
+        spec: Literal["-", "*", "^"] | None = None,
     ) -> None:
         """
         A command to sync all slash commands to servers user requires. Works like this:

pyproject.toml

@@ -1,11 +1,23 @@
 [tool.ruff]
 
-select = ["ALL"]
-
-ignore = [
-    "D", # Ignore docstrings
-    "E501", # Line too long, let Black handle this
-    "ANN", # typing, let mypy handle tis
-    "INP001" # Namespace package eeeeh
+select = [
+    "E",   # pycodestyle
+    "F",   # pyflakes
+    "UP",  # pyupgrade,
+    "I",   # isort
+    "UP", # pyupgrade
+    "ASYNC",
+    "BLE", # Blind Exception
+    "T20", # Found a print!
+    "RET", # Unnecessary return
+    "SIM", # Simplify
+]
+exclude = [
+    "tests",
 ]
 
+line-length = 120
+
+[tool.black]
+
+line-length = 120

readme.md

@@ -1,4 +1,3 @@
-r
 <h1 align=center>
 <img src="fotky/Jáchym.png" alt="Logo Jáchyma">
 <br>

src/db_folder/databases.py

@@ -1,11 +1,14 @@
 from collections.abc import AsyncIterator
+from typing import TYPE_CHECKING
 
 import aiomysql
 import discord.errors
 from discord import Message
 from loguru import logger
 
-from src.jachym import Jachym
+if TYPE_CHECKING:
+    from src.jachym import Jachym
+
 from src.ui.poll import Poll
 
 
@@ -68,7 +71,7 @@ async def fetch_all_answers(self, message_id) -> list[str]:
         tuple_of_tuples_db = await self.fetch_all_values(sql, value)
         return [answer for tupl in tuple_of_tuples_db for answer in tupl]
 
-    async def fetch_all_polls(self, bot: Jachym) -> AsyncIterator[Poll and Message]:
+    async def fetch_all_polls(self, bot: "Jachym") -> AsyncIterator[Poll and Message]:
         sql = "SELECT * FROM `Poll`"
         polls = await self.fetch_all_values(sql)
 
@@ -102,26 +105,21 @@ def __init__(self, pool: aiomysql.pool.Pool):
 
     async def add_options(self, discord_poll: Poll):
         sql = "INSERT INTO `VoteButtons`(message_id, answers) VALUES (%s, %s)"
-        values = [
-            (discord_poll.message_id, vote_option)
-            for vote_option in discord_poll.options
-        ]
+        values = [(discord_poll.message_id, vote_option) for vote_option in discord_poll.options]
         await self.commit_many_values(sql, values)
 
-    async def add_user(self, message_id: Poll, user: int, index: int):
+    async def add_user(self, discord_poll: Poll, user: int, index: int):
         sql = "INSERT INTO `Answers`(message_id, vote_user, iter_index) VALUES (%s, %s, %s)"
-        values = (message_id, user, index)
+        values = (discord_poll.message_id, user, index)
         await self.commit_value(sql, values)
 
-    async def remove_user(self, message_id: Poll, user: int, index: int):
+    async def remove_user(self, discord_poll: Poll, user: int, index: int):
         sql = "DELETE FROM `Answers` WHERE message_id = %s AND vote_user = %s AND iter_index = %s"
-        value = (message_id, user, index)
+        value = (discord_poll.message_id, user, index)
         await self.commit_value(sql, value)
 
     async def fetch_all_users(self, poll: Poll, index: int) -> set[int]:
-        sql = (
-            "SELECT vote_user FROM `Answers` WHERE message_id = %s AND iter_index = %s"
-        )
+        sql = "SELECT vote_user FROM `Answers` WHERE message_id = %s AND iter_index = %s"
 
         values = (poll.message_id, index)
         users_voted_for = await self.fetch_all_values(sql, values)