src-tauri/src/main.rs


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#![cfg_attr(
    all(not(debug_assertions), target_os = "windows"),
    windows_subsystem = "windows"
)]

use std::{
    sync::{Arc, Mutex},
    time::Duration,
};

use tauri::{Manager, State};
use tokio::time::sleep;

#[derive(Default)]
struct Counter(Arc<Mutex<i32>>);

fn main() {
    tauri::Builder::default()
        .setup(|app| {
            let app_handle = app.app_handle();
            tauri::async_runtime::spawn(async move {
                loop {
                    sleep(Duration::from_millis(2000)).await;
                    println!("sending backend ping");
                    app_handle.emit_all("backend-ping", "ping").unwrap();
                }
            });

            Ok(())
        })
        .manage(Counter(Default::default()))
        .invoke_handler(tauri::generate_handler![
            hello_world,
            add_count,
            force_panic
        ])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

#[tauri::command]
fn hello_world() -> String {
    "Hello World!!!".to_string()
}

#[tauri::command]
fn add_count(num: i32, counter: State<'_, Counter>) -> String {
    let mut val = counter.0.lock().unwrap();
    *val += num;

    format!("{val}")
}

#[tauri::command]
/// This function's only use is to force a `panic!()`
fn force_panic() {
    panic!("Force panicked!");
}