region-proxy 1.3.0

A CLI tool to create a SOCKS proxy through AWS EC2 in any region
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use anyhow::{Context, Result};
use serde::{de::DeserializeOwned, Serialize};
use std::fs;
use std::io::ErrorKind;
use std::path::{Path, PathBuf};

pub fn app_dir() -> Result<PathBuf> {
    let home = dirs::home_dir().context("Could not find home directory")?;
    let dir = home.join(".region-proxy");
    fs::create_dir_all(&dir)?;
    Ok(dir)
}

pub fn load_json<T: DeserializeOwned>(path: &Path) -> Result<Option<T>> {
    match fs::read_to_string(path) {
        Ok(content) => Ok(Some(serde_json::from_str(&content)?)),
        Err(e) if e.kind() == ErrorKind::NotFound => Ok(None),
        Err(e) => Err(e.into()),
    }
}

pub fn save_json<T: Serialize>(path: &Path, value: &T) -> Result<()> {
    fs::write(path, serde_json::to_string_pretty(value)?)?;
    Ok(())
}

/// Returns true if a file was removed, false if it did not exist.
pub fn remove_file_if_exists(path: &Path) -> Result<bool> {
    match fs::remove_file(path) {
        Ok(()) => Ok(true),
        Err(e) if e.kind() == ErrorKind::NotFound => Ok(false),
        Err(e) => Err(e.into()),
    }
}