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pub mod clean;
pub mod raw;
pub mod config_type;
pub use config_type::ConfigType;
use serde::de::DeserializeOwned;
use std::fs;
use std::path::{Path, PathBuf};
use crate::error::AppResult;
use crate::CONFIG_HIERARCHY;
pub trait TomlConfigFile: Sized + Default {
type Raw: Into<Self> + DeserializeOwned;
fn get_type() -> config_type::ConfigType;
fn get_config() -> Self {
parse_config_or_default::<Self::Raw, Self>(Self::get_type().as_filename())
}
}
// searches a list of folders for a given file in order of preference
pub fn search_directories<P>(file_name: &str, directories: &[P]) -> Option<PathBuf>
where
P: AsRef<Path>,
{
directories
.iter()
.map(|path| path.as_ref().join(file_name))
.find(|path| path.exists())
}
pub fn search_config_directories(file_name: &str) -> Option<PathBuf> {
search_directories(file_name, &CONFIG_HIERARCHY)
}
fn parse_file_to_config<T, S>(file_path: &Path) -> AppResult<S>
where
T: DeserializeOwned + Into<S>,
{
let file_contents = fs::read_to_string(file_path)?;
let config = toml::from_str::<T>(&file_contents)?;
Ok(config.into())
}
pub fn parse_config_or_default<T, S>(file_name: &str) -> S
where
T: DeserializeOwned + Into<S>,
S: std::default::Default,
{
match search_config_directories(file_name) {
Some(file_path) => match parse_file_to_config::<T, S>(&file_path) {
Ok(s) => s,
Err(e) => {
eprintln!("Failed to parse {}: {}", file_name, e);
S::default()
}
},
None => S::default(),
}
}
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