backend/src/main.rs

   1 extern crate askama;
   2
   3 use std::{ sync::Mutex, env::args, fs::File, io::prelude::* };
   4
   5 use actix_files as fs;
   6 use actix_web::{ get, web, Responder, middleware, App, HttpServer };
   7 use askama::Template;
   8 use ron::{ de::from_reader, ser::{ to_string_pretty, PrettyConfig } };
   9 use serde::{ Deserialize, Serialize };
  10 use cached::proc_macro::cached;
  11
  12 mod consts;
  13 mod tests;
  14 mod valheim_controller;
  15
  16 #[derive(Template)]
  17 #[template(path = "main.html")]
  18 struct MainTemplate {
  19     text_status: String,
  20     memory: String,
  21     load_average: String,
  22     uptime: String,
  23     world_size: String,
  24     nb_of_players: u32,
  25     last_backup: String,
  26 }
  27
  28 const VALUE_UNKNOWN: &str = "-";
  29
  30 #[cached(size = 1, time = 10)]
  31 fn get_valheim_executable_information_cached(world_path: String) -> Option<valheim_controller::ValheimExe> {
  32     valheim_controller::get_valheim_executable_information(&world_path)
  33 }
  34
  35 #[get("/")]
  36 async fn main_page(config_shared: web::Data<Mutex<Config>>) -> impl Responder {
  37     let config = config_shared.lock().unwrap();
  38
  39     match get_valheim_executable_information_cached(config.world_path.clone()) {
  40         Some(info) =>
  41             MainTemplate {
  42                 text_status: String::from("Valheim server is up and running :)"),
  43                 memory: info.format_memory(),
  44                 load_average: info.format_load_average(),
  45                 uptime: info.format_uptime(),
  46                 world_size: info.format_world_size(),
  47                 nb_of_players: info.get_nb_of_player(),
  48                 last_backup: info.format_last_backup()
  49             },
  50         None => {
  51             let value_unknown = String::from(VALUE_UNKNOWN);
  52             MainTemplate { text_status: String::from("Valheim server is down :("), memory: value_unknown.clone(), load_average: value_unknown.clone(), uptime: value_unknown.clone(), world_size: value_unknown.clone(), nb_of_players: 0, last_backup: value_unknown.clone() }
  53         }
  54     }
  55 }
  56
  57 #[derive(Debug, Deserialize, Serialize)]
  58 struct Config {
  59     port: u16,
  60
  61     #[serde(default = "empty_string")]
  62     world_path: String,
  63
  64     #[serde(default = "empty_string")]
  65     backup_path: String,
  66 }
  67
  68 fn empty_string() -> String { "".to_owned() }
  69
  70 impl Config {
  71     fn default() -> Self {
  72         Config { port: 8082, world_path: String::from(""), backup_path: String::from("") }
  73     }
  74 }
  75
  76 fn get_exe_name() -> String {
  77     let first_arg = std::env::args().next().unwrap();
  78     let sep: &[_] = &['\\', '/'];
  79     first_arg[first_arg.rfind(sep).unwrap()+1..].to_string()
  80 }
  81
  82 fn load_config() -> Config {
  83     // unwrap_or_else(|_| panic!("Failed to open configuration file {}", consts::FILE_CONF));
  84     match File::open(consts::FILE_CONF) {
  85         Ok(file) => from_reader(file).unwrap_or_else(|_| panic!("Failed to open configuration file {}", consts::FILE_CONF)),
  86         Err(_) => {
  87             let mut file = File::create(consts::FILE_CONF) .unwrap();
  88             let default_config = Config::default();
  89             file.write_all(to_string_pretty(&default_config, PrettyConfig::new()).unwrap().as_bytes()).unwrap(); // We do not use 'to_writer' because it can't pretty format the output.
  90             default_config
  91         }
  92     }
  93 }
  94
  95 #[actix_rt::main]
  96 async fn main() -> std::io::Result<()> {
  97     let config = load_config();
  98     let port = config.port;
  99
 100     if process_args(&config) { return Ok(()) }
 101
 102     println!("Starting Valheim Admin as web server...");
 103
 104     println!("Configuration: {:?}", config);
 105
 106     let config_shared = web::Data::new(Mutex::new(config));
 107
 108     let server =
 109         HttpServer::new(
 110             move || {
 111                 App::new()
 112                     .app_data(config_shared.clone())
 113                     .wrap(middleware::Compress::default())
 114                     .wrap(middleware::Logger::default())
 115                     .service(main_page)
 116                     .service(fs::Files::new("/static", "static").show_files_listing())
 117             }
 118         )
 119         .bind(&format!("0.0.0.0:{}", port))
 120         .unwrap();
 121
 122     server.run().await
 123 }
 124
 125 fn process_args(config: &Config) -> bool {
 126     fn print_usage() {
 127         println!("Usage:");
 128         println!(" {} [--help] [--status]", get_exe_name());
 129     }
 130
 131     let args: Vec<String> = args().collect();
 132
 133     if args.iter().any(|arg| arg == "--help") {
 134         print_usage();
 135         return true
 136     } else if args.iter().any(|arg| arg == "--status") {
 137         println!("{:?}", valheim_controller::get_valheim_executable_information(&config.world_path, &config.backup_path));
 138         return true
 139     }
 140
 141     false
 142 }