Implement proper error handling within each cog

Description

Currently, our cogs lack comprehensive error handling, which can lead to unexpected behavior and poor user experience when errors occur.

Objectives

Implement global error handlers for each cog
Add specific error handling for individual commands
Improve logging for error tracking and debugging
Provide user-friendly error messages

Tasks

[ ] Implement cog_command_error method in each cog to handle general command errors
[ ] Add try-except blocks in complex methods to catch and handle specific exceptions
[ ] Implement custom exception classes for cog-specific errors if necessary
[ ] Add error handling for API calls and external services interactions
[ ] Implement proper logging for all caught exceptions
[ ] Create user-friendly error messages for common error scenarios
[ ] Add error handling for database operations (if applicable)
[ ] Implement rate limiting error handling
[ ] Handle Discord API errors gracefully

Implementation Details

Global Error Handler

For each cog, implement a cog_command_error method:

async def cog_command_error(self, ctx, error):
    if isinstance(error, commands.CommandOnCooldown):
        await ctx.send(f"This command is on cooldown. Try again in {error.retry_after:.2f} seconds.")
    elif isinstance(error, commands.MissingRequiredArgument):
        await ctx.send(f"Missing required argument: {error.param}")
    else:
        await ctx.send("An error occurred while processing the command.")

    logging.error(f"An error occurred in {ctx.command}: {str(error)}")

Specific Command Error Handling

For individual commands that may raise specific exceptions:

@commands.command()
async def example_command(self, ctx):
    try:
        # Command logic here
        result = await self.some_operation()
    except SomeSpecificError as e:
        await ctx.send(f"A specific error occurred: {str(e)}")
        logging.error(f"SomeSpecificError in example_command: {str(e)}")
    except Exception as e:
        await ctx.send("An unexpected error occurred.")
        logging.exception(f"Unexpected error in example_command: {str(e)}")

Acceptance Criteria

All cogs have a global error handler implemented
Each command with potential for specific errors has try-except blocks
All caught exceptions are logged with appropriate detail
Users receive informative, friendly messages for common error scenarios
Sensitive information is not exposed in user-facing error messages
Error handling does not significantly impact performance

Additional Considerations

Consider implementing a custom error formatting utility for consistency across cogs
Evaluate the need for a centralized error tracking system (e.g., Sentry)
Ensure error messages are internationalized if the bot supports multiple languages

branhoff / hooter-the-tutor

Implement proper error handling within each cog #17