implement player count display

.gitignore

@@ -17,3 +17,4 @@ static/moment.js
 *.sqlite
 *.png
 blacklist.json
+servers.json

README.md

@@ -32,6 +32,22 @@ Players can be blacklisted by name via a *blacklist.json* file in the project ro
         "blacklist" : ["name", "name_2"]
     }
 
+# Adding servers for player count live info
+Source-Servers can be added via the *servers.json*-file:
+
+    [
+        {
+            "name" : "server_1",
+            "host" : "example.com",
+            "port" : 27015
+        },
+        {
+            ...
+        }
+    ]
+    
+*Python-valve* is required if this file exists.
+
 # Preview
 ![open-web-leaderboard](https://media.atlantishq.de/leaderboard-github-picture.png)
 

server.py

@@ -20,6 +20,7 @@ cache = fcache.Cache(app, config={'CACHE_TYPE': 'simple'})
 cache.init_app(app)
 
 SEGMENT=100
+SERVERS=list()
 
 
 
@@ -29,6 +30,27 @@ def prettifyMinMaxY(computedMin, computedMax):
     else:
         return (computedMin - 100, 4000)
 
+@app.route("/players-online")
+def playersOnline():
+    '''Calc and return the online players'''
+
+    playerTotal = 0
+    error       = ""
+
+    for s in SERVERS:
+        try:
+            with valve.source.a2s.ServerQuerier((args.host, args.port)) as server:
+                playerTotal += int(server.info()["player_count"])
+        except NoResponseError:
+            error = "Server Unreachable"
+        except Exception as e:
+            error = str(e)
+
+    retDict = { "player_total" : playerTotal, "error" : error }
+    return flask.Response(json.dumps(retDict), 200, mimetype='application/json')
+            
+    
+
 @app.route("/round-info")
 def singleRound():
     '''Display info about a single round itdentified by it's timestamp'''
@@ -252,7 +274,12 @@ def send_js(path):
 
 @app.before_first_request
 def init():
-    pass
+    SERVERS_FILE = "servers.json"
+    if os.path.isfile(SERVERS_FILE):
+        import valve.source.a2s
+        from valve.source import NoResponseError
+        with open(SERVERS_FILE) as f:
+            SERVERS = json.load(f)
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description='Start open-leaderboard', \

templates/base.html

@@ -10,6 +10,21 @@
         {% include 'navbar_leaderboard.html' %}
 
         <div class="container mt-3 mb-3" role="main">
+            <div id="playerDisplay" class="playerDisplay mb-3 mt-2">
+                <script>
+                    fetch("/players-online").then(
+                            response => response.json()
+                        ).then(
+                            data => { 
+                                if(data["error"] == ""){
+                                    document.getElementById("playerDisplay").innerHTML = "Players Online: " + data["player_total"]
+                                }else{
+                                    document.getElementById("playerDisplay").innerHTML = "Players Online: (error)" + data["error"]
+                                }
+                            }
+                        )
+                </script>
+            </div>
             <table id="tableMain" class="table table-striped table-bordered table-sm"
                     cellspacing="0">
                 <thead>