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use std::path::PathBuf;

use crate::rh_name;

pub trait OsDirs {
    fn app_path(&self, filename: &str) -> Option<PathBuf>;
    fn app_config_directory(&self) -> Option<PathBuf>;
    fn config_directory(&self) -> Option<PathBuf>;
}

#[derive(Default)]
pub struct DefaultOsDirs;

impl OsDirs for DefaultOsDirs {
    fn app_path(&self, filename: &str) -> Option<PathBuf> {
        self.app_config_directory().map(|path| path.join(filename))
    }

    fn app_config_directory(&self) -> Option<PathBuf> {
        self.config_directory().map(|path| path.join(rh_name!()))
    }

    fn config_directory(&self) -> Option<PathBuf> {
        dirs::config_dir()
    }
}