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
  11 mod consts;
  12 mod tests;
  13 mod valheim_controller;
  14
  15 #[derive(Template)]
  16 #[template(path = "main.html")]
  17 struct MainTemplate {
  18     text_status: String,
  19     memory: String,
  20     load_average: String,
  21     uptime: String,
  22     world_size: String
  23 }
  24
  25 const VALUE_UNKNOWN: &str = "-";
  26
  27 #[get("/")]
  28 async fn main_page(config_shared: web::Data<Mutex<Config>>) -> impl Responder {
  29     let config = config_shared.lock().unwrap();
  30
  31     match valheim_controller::get_valheim_executable_information(&config.world_path) {
  32         Some(info) =>
  33             MainTemplate {
  34                 text_status: String::from("Valheim server is up and running :)"),
  35                 memory: info.format_memory(),
  36                 load_average: info.format_load_average(),
  37                 uptime: info.format_uptime(),
  38                 world_size: info.format_world_size()
  39             },
  40         None => {
  41             let value_unknown = String::from(VALUE_UNKNOWN);
  42             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() }
  43         }
  44     }
  45 }
  46
  47 #[derive(Debug, Deserialize, Serialize)]
  48 struct Config {
  49     port: u16,
  50     #[serde(default = "empty_string")]
  51     world_path: String,
  52 }
  53
  54 fn empty_string() -> String { "".to_owned() }
  55
  56 impl Config {
  57     fn default() -> Self {
  58         Config { port: 8082, world_path: String::from("") }
  59     }
  60 }
  61
  62 fn get_exe_name() -> String {
  63     let first_arg = std::env::args().next().unwrap();
  64     let sep: &[_] = &['\\', '/'];
  65     first_arg[first_arg.rfind(sep).unwrap()+1..].to_string()
  66 }
  67
  68 fn load_config() -> Config {
  69     // unwrap_or_else(|_| panic!("Failed to open configuration file {}", consts::FILE_CONF));
  70     match File::open(consts::FILE_CONF) {
  71         Ok(file) => from_reader(file).unwrap_or_else(|_| panic!("Failed to open configuration file {}", consts::FILE_CONF)),
  72         Err(_) => {
  73             let mut file = File::create(consts::FILE_CONF) .unwrap();
  74             let default_config = Config::default();
  75             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.
  76             default_config
  77         }
  78     }
  79 }
  80
  81 #[actix_rt::main]
  82 async fn main() -> std::io::Result<()> {
  83     let config = load_config();
  84     let port = config.port;
  85
  86     if process_args(&config) { return Ok(()) }
  87
  88     println!("Starting Valheim Admin as web server...");
  89
  90     println!("Configuration: {:?}", config);
  91
  92     let config_shared = web::Data::new(Mutex::new(config));
  93
  94     let server =
  95         HttpServer::new(
  96             move || {
  97                 App::new()
  98                     .app_data(config_shared.clone())
  99                     .wrap(middleware::Compress::default())
 100                     .wrap(middleware::Logger::default())
 101                     .service(main_page)
 102                     .service(fs::Files::new("/static", "static").show_files_listing())
 103             }
 104         )
 105         .bind(&format!("0.0.0.0:{}", port))
 106         .unwrap();
 107
 108     server.run().await
 109 }
 110
 111 fn process_args(config: &Config) -> bool {
 112     fn print_usage() {
 113         println!("Usage:");
 114         println!(" {} [--help] [--status]", get_exe_name());
 115     }
 116
 117     let args: Vec<String> = args().collect();
 118
 119     if args.iter().any(|arg| arg == "--help") {
 120         print_usage();
 121         return true
 122     } else if args.iter().any(|arg| arg == "--status") {
 123         println!("{:?}", valheim_controller::get_valheim_executable_information(&config.world_path));
 124         return true
 125     }
 126
 127     false
 128 }