fumble 0.6.1

an oxidized implementation of the original clumsy tool, designed to simulate adverse network conditions on Windows systems.
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use crate::cli::settings::bandwidth::BandwidthOptions;
use crate::cli::settings::delay::DelayOptions;
use crate::cli::settings::drop::DropOptions;
use crate::cli::settings::duplicate::DuplicateOptions;
use crate::cli::settings::reorder::ReorderOptions;
use crate::cli::settings::tamper::TamperOptions;
use crate::cli::settings::throttle::ThrottleOptions;
use crate::cli::utils::serialization::serialize_option;
use clap::Parser;
use serde::{Deserialize, Serialize};
use std::io::Write;
use std::path::Path;
use std::{fs, io};

#[derive(Parser, Debug, Serialize, Deserialize, Default)]
pub struct PacketManipulationSettings {
    #[command(flatten)]
    #[serde(serialize_with = "serialize_option")]
    pub drop: Option<DropOptions>,

    #[command(flatten)]
    #[serde(default, serialize_with = "serialize_option")]
    pub delay: Option<DelayOptions>,

    #[command(flatten)]
    #[serde(serialize_with = "serialize_option")]
    pub throttle: Option<ThrottleOptions>,

    #[command(flatten)]
    #[serde(serialize_with = "serialize_option")]
    pub reorder: Option<ReorderOptions>,

    #[command(flatten)]
    #[serde(serialize_with = "serialize_option")]
    pub tamper: Option<TamperOptions>,

    #[command(flatten)]
    #[serde(serialize_with = "serialize_option")]
    pub duplicate: Option<DuplicateOptions>,

    #[command(flatten)]
    #[serde(serialize_with = "serialize_option")]
    pub bandwidth: Option<BandwidthOptions>,
}

impl PacketManipulationSettings {
    /// Load configuration from a TOML file
    pub fn load_from_file<P: AsRef<Path>>(path: P) -> io::Result<Self> {
        let content = fs::read_to_string(path)?;
        let config =
            toml::from_str(&content).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
        Ok(config)
    }

    /// Save current configuration to a TOML file
    pub fn save_to_file<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
        let content = toml::to_string_pretty(self)
            .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
        let mut file = fs::File::create(path)?;
        file.write_all(content.as_bytes())?;
        Ok(())
    }

    /// Create a default configuration file with all fields set to default values
    /// but commented out
    pub fn create_default_config_file<P: AsRef<Path>>(path: P) -> io::Result<()> {
        let default_cli = Self::default();

        // Serialize the default configuration to TOML
        let serialized = toml::to_string_pretty(&default_cli)
            .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;

        // Comment out all lines
        let commented_out = serialized
            .lines()
            .map(|line| {
                if line.trim().is_empty() || line.starts_with('[') {
                    line.to_string()
                } else {
                    format!("# {}", line)
                }
            })
            .collect::<Vec<String>>()
            .join("\n");

        let mut file = fs::File::create(path)?;
        file.write_all(commented_out.as_bytes())?;
        Ok(())
    }
}