codemonument_bx 0.3.5

// This file contains logic to get the actual configuration itself

use std::env;
use std::fs;
use std::path::Path;

pub const DEFAULT_BX_CFG_PATH: &str = "./bx.toml";
pub const DEFAULT_BONNIE_CFG_PATH: &str = "./bonnie.toml";

pub fn get_cfg() -> Result<String, String> {
	let path = resolve_cfg_path(
		env::var("BX_CONF").ok().as_deref(),
		env::var("BONNIE_CONF").ok().as_deref(),
		Path::new(DEFAULT_BX_CFG_PATH).exists(),
	);
	let cfg_string = fs::read_to_string(&path);
	match cfg_string {
		Ok(cfg_string) => Ok(cfg_string),
		Err(_) => Err(format!("Error reading configuration file at '{}', make sure the file is present in this directory and you have the permissions to read it.", path))
	}
}

pub fn resolve_cfg_path(
	bx_conf: Option<&str>,
	bonnie_conf: Option<&str>,
	bx_toml_exists: bool,
) -> String {
	if let Some(path) = bx_conf {
		return path.to_string();
	}
	if let Some(path) = bonnie_conf {
		return path.to_string();
	}
	if bx_toml_exists {
		DEFAULT_BX_CFG_PATH.to_string()
	} else {
		DEFAULT_BONNIE_CFG_PATH.to_string()
	}
}

#[cfg(test)]
mod tests {
	use super::*;

	#[test]
	fn bx_conf_takes_priority() {
		let result = resolve_cfg_path(Some("/bx/path"), Some("/bonnie/path"), true);
		assert_eq!(result, "/bx/path");
	}

	#[test]
	fn bonnie_conf_used_when_bx_conf_not_set() {
		let result = resolve_cfg_path(None, Some("/bonnie/path"), true);
		assert_eq!(result, "/bonnie/path");
	}

	#[test]
	fn bx_toml_used_when_no_env_vars_and_exists() {
		let result = resolve_cfg_path(None, None, true);
		assert_eq!(result, DEFAULT_BX_CFG_PATH);
	}

	#[test]
	fn bonnie_toml_used_when_no_env_vars_and_bx_toml_missing() {
		let result = resolve_cfg_path(None, None, false);
		assert_eq!(result, DEFAULT_BONNIE_CFG_PATH);
	}
}