From 59a054a524604e924aa9e54f837c8bd4d090c0f2 Mon Sep 17 00:00:00 2001
From: Greg Burri <greg.burri@gmail.com>
Date: Mon, 22 Mar 2021 11:01:11 +0100
Subject: [PATCH] Show player names (WIP)

---
 backend/src/main.rs               | 13 ++++++++---
 backend/src/valheim_controller.rs | 39 +++++++++++++++++++++++--------
 backend/templates/main.html       |  2 +-
 3 files changed, 40 insertions(+), 14 deletions(-)

diff --git a/backend/src/main.rs b/backend/src/main.rs
index 8ea0819..c186c3f 100644
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -21,7 +21,7 @@ struct MainTemplate {
     load_average: String,
     uptime: String,
     world_size: String,
-    nb_of_players: u32,
+    active_players: String,
     last_backup: String,
 }
 
@@ -44,12 +44,19 @@ async fn main_page(config_shared: web::Data<Mutex<Config>>) -> impl Responder {
                 load_average: info.format_load_average(),
                 uptime: info.format_uptime(),
                 world_size: info.format_world_size(),
-                nb_of_players: info.get_nb_of_player(),
+                active_players: info.format_active_players(),
                 last_backup: info.format_last_backup()
             },
         None => {
             let value_unknown = String::from(VALUE_UNKNOWN);
-            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() }
+            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(),
+                active_players: value_unknown.clone(),
+                last_backup: value_unknown.clone() }
         }
     }
 }
diff --git a/backend/src/valheim_controller.rs b/backend/src/valheim_controller.rs
index f11f7f4..0aa92de 100644
--- a/backend/src/valheim_controller.rs
+++ b/backend/src/valheim_controller.rs
@@ -13,7 +13,7 @@ pub struct ValheimExe {
     load_average_5min: f64, // [%].
     uptime: u64, // [s].
     world_size: u64, // [B].
-    nb_of_players: u32,
+    active_players: Vec<String>,
     last_backup: Option<SystemTime>,
 }
 
@@ -37,8 +37,8 @@ impl ValheimExe {
         format_byte_size(self.world_size, 2)
     }
 
-    pub fn get_nb_of_player(&self) -> u32 {
-        self.nb_of_players
+    pub fn format_active_players(&self) -> String {
+        self.active_players.join(", ")
     }
 
     pub fn format_last_backup(&self) -> String {
@@ -73,36 +73,55 @@ fn format_byte_size(bytes: u64, precision: usize) -> String {
 const VALHEIM_PROCESS_NAME: &str = "valheim_server";
 
 #[cfg(target_os = "linux")]
-fn get_number_of_players() -> u32 {
+fn get_active_players() -> Vec<String> {
     let mut journal =
         journal::OpenOptions::default().current_user(true).open().unwrap();
 
     journal.seek_tail().unwrap();
 
+    let mut number_of_connections = -1;
+    let mut players : Vec<String> = Vec::new();
+
     loop {
         match journal.previous_entry() {
             Ok(Some(entry)) => {
                 if let (Some(unit), Some(mess)) = (entry.get("_SYSTEMD_UNIT"), entry.get("MESSAGE")) {
                     if unit == "valheim.service" {
-                        if let Some(pos) = mess.find("Connections") {
+                        //"Got character ZDOID from {}"
+                        if let Some(pos) = mess.find("Got character ZDOID from") {
+                            let character_str = mess.get(pos+25..).unwrap();
+                            if let Some(pos_end) = character_str.find(" : ") {
+                                let player_name = String::from(character_str.get(0..pos_end));
+                                if !players.contains(player_name) {
+                                    players.push(player_name);
+                                    if players.len() == number_of_connections {
+                                        return players;
+                                    }
+                                }
+                            }
+                        }
+                        else if let Some(pos) = mess.find("Connections") {
                             let nb_of_connections_str = mess.get(pos+12..).unwrap();
                             if let Some(pos_end) = nb_of_connections_str.find(' ') {
                                 if let Ok(n) = nb_of_connections_str.get(0..pos_end).unwrap().parse() {
-                                    return n;
+                                    number_of_connections = n;
+                                    if players.len() >= number_of_connections {
+                                        return players;
+                                    }
                                 }
                             }
                         }
                     }
                 }
             },
-            _ => return 0
+            _ => return players
         }
     }
 }
 
 #[cfg(target_os = "windows")]
-fn get_number_of_players() -> u32 {
-    0
+fn get_active_players() -> Vec<String> {
+    Vec::new()
 }
 
 fn get_last_backup_datetime(backup_path: &str) -> Option<SystemTime> {
@@ -136,7 +155,7 @@ pub fn get_valheim_executable_information(world_path: &str, backup_path: &str) -
                 load_average_5min: system.get_load_average().five / system.get_processors().len() as f64 * 100.,
                 uptime: std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_secs() - process.start_time(),
                 world_size,
-                nb_of_players: get_number_of_players(),
+                active_players: get_active_players(),
                 last_backup: get_last_backup_datetime(backup_path)
             }
         )
diff --git a/backend/templates/main.html b/backend/templates/main.html
index aef9992..7e7eff4 100644
--- a/backend/templates/main.html
+++ b/backend/templates/main.html
@@ -11,7 +11,7 @@
         <div class="container">
             <h1>{{ text_status }}</h1>
             <table>
-                <tr><td>Number of active players</td><td>{{ nb_of_players }}</td>
+                <tr><td>Active players</td><td>{{ active_players }}</td>
                 <tr><td>World size</td><td>{{ world_size }}</td></tr>
                 <tr><td>Memory used</td><td>{{ memory }}</td></tr>
                 <tr><td>Load average (5 min)</td><td>{{ load_average }}</td></tr>
-- 
2.45.2