harmony/opnsense-config/src/config/manager/local_file.rs

use crate::config::check_hash;
use crate::config::manager::ConfigManager;
use crate::error::Error;
use async_trait::async_trait;
use std::fs;

#[derive(Debug)]
pub struct LocalFileConfigManager {
    file_path: String,
}

impl LocalFileConfigManager {
    pub fn new(file_path: String) -> Self {
        Self { file_path }
    }
}

#[async_trait]
impl ConfigManager for LocalFileConfigManager {
    async fn load_as_str(&self) -> Result<String, Error> {
        Ok(fs::read_to_string(&self.file_path)?)
    }

    async fn save_config(&self, content: &str, hash: &str) -> Result<(), Error> {
        let current_content = self.load_as_str().await?;
        if !check_hash(&current_content, hash) {
            return Err(Error::Config(format!(
                "OPNSense config file changed since loading it! Hash when loading : {hash}"
            )));
        }
        Ok(fs::write(&self.file_path, content)?)
    }

    async fn apply_new_config(&self, content: &str, hash: &str) -> Result<(), Error> {
        self.save_config(content, hash).await
    }
}