kovi/
utils.rs

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use serde::{de::DeserializeOwned, Serialize};
use std::{
    fs::{self, File},
    io::{Read, Write},
    path::Path,
};

fn save_data(data: &[u8], file_path: &Path) -> Result<(), Box<dyn std::error::Error>> {
    if let Some(parent) = file_path.parent() {
        if !parent.exists() {
            fs::create_dir_all(parent)?;
        }
    }

    let mut file = File::create(file_path)?;
    file.write_all(data)?;

    Ok(())
}

/// 加载本地json数据，如果没有则保存传入的数据进指定路径
pub fn load_json_data<T, P>(data: T, file_path: P) -> Result<T, Box<dyn std::error::Error>>
where
    T: Serialize + DeserializeOwned,
    P: AsRef<Path>,
{
    if !file_path.as_ref().exists() {
        let serialized_data = serde_json::to_string(&data)?;
        save_data(serialized_data.as_bytes(), file_path.as_ref())?;
        return Ok(data);
    }

    let mut file = File::open(&file_path)?;
    let mut contents = String::new();
    file.read_to_string(&mut contents)?;
    let deserialized_data = serde_json::from_str(&contents)?;

    Ok(deserialized_data)
}

/// 加载本地toml数据，如果没有则保存传入的数据进指定路径
pub fn load_toml_data<T, P>(data: T, file_path: P) -> Result<T, Box<dyn std::error::Error>>
where
    T: Serialize + DeserializeOwned,
    P: AsRef<Path>,
{
    if !file_path.as_ref().exists() {
        let serialized_data = toml::to_string(&data)?;
        save_data(serialized_data.as_bytes(), file_path.as_ref())?;
        return Ok(data);
    }

    let mut file = File::open(file_path)?;
    let mut contents = String::new();
    file.read_to_string(&mut contents)?;
    let deserialized_data = toml::from_str(&contents)?;

    Ok(deserialized_data)
}

/// 将json数据保存在传入的地址
pub fn save_json_data<T, P>(data: &T, file_path: P) -> Result<(), Box<dyn std::error::Error>>
where
    T: Serialize,
    P: AsRef<Path>,
{
    let serialized_data = serde_json::to_string(data)?;
    save_data(serialized_data.as_bytes(), file_path.as_ref())?;
    Ok(())
}

/// 将toml数据保存在传入的地址
pub fn save_toml_data<T, P>(data: &T, file_path: P) -> Result<(), Box<dyn std::error::Error>>
where
    T: Serialize,
    P: AsRef<Path>,
{
    let serialized_data = toml::to_string(data)?;
    save_data(serialized_data.as_bytes(), file_path.as_ref())?;
    Ok(())
}