netter_core 0.1.1

Core for Netter project
Documentation 
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use serde::{Deserialize, Serialize};

const STATE_FILE: &str = "SERVER_STATE.json";

#[derive(Serialize, Deserialize)]
pub struct ServerState {
    pub kind: String,
    pub pid: u32,
    pub host: String,
    pub port: u16,
}

pub fn save_state(kind: String, host: String, port: u16) -> Result<(), Box<dyn std::error::Error>> {
    let state = ServerState {
        kind,
        pid: std::process::id(),
        host,
        port,
    };
    let serialized = serde_json::to_string(&state)?;
    std::fs::write(&STATE_FILE, serialized)
        .map_err(|e| format!("Failed to write in state file: {e}"))?;

    Ok(())
}

pub fn load_state() -> Option<ServerState> {
    if let Ok(data) = std::fs::read_to_string(&STATE_FILE) {
        serde_json::from_str(&data).ok()
    } else {
        None
    }
}

pub fn delete_file() -> Result<(), Box<dyn std::error::Error>> {
    std::fs::remove_file(&STATE_FILE)
        .map_err(|e| format!("Failed to delete state file: {e}"))?;
    Ok(())
}