From 7a8c5c2842e27bf4a3556a943d1f595dadc1fe11 Mon Sep 17 00:00:00 2001
From: Tobias Kohlbau <tobias@kohlbau.de>
Date: Sun, 17 Dec 2017 13:30:24 +0100
Subject: [PATCH] multiplayer: Adds option to pause server

OpenRCT2 does not provide a simple function to pause a server
while no client is connected. This patch adds a so called
"pause_server_if_no_clients" flag within network section of
config.ini. By default this flag is set to false to be backward
compatible with running servers. After setting this flag to
true the game is paused on launch and gets unpaused on first
connection.

Signed-off-by: Tobias Kohlbau <tobias@kohlbau.de>
---
 src/openrct2/config/Config.cpp   |  2 ++
 src/openrct2/config/Config.h     |  1 +
 src/openrct2/network/Network.cpp | 13 +++++++++++++
 3 files changed, 16 insertions(+)

diff --git a/src/openrct2/config/Config.cpp b/src/openrct2/config/Config.cpp
index 1a267c3cb3..437423d744 100644
--- a/src/openrct2/config/Config.cpp
+++ b/src/openrct2/config/Config.cpp
@@ -380,6 +380,7 @@ namespace Config
             model->known_keys_only = reader->GetBoolean("known_keys_only", false);
             model->log_chat = reader->GetBoolean("log_chat", false);
             model->log_server_actions = reader->GetBoolean("log_server_actions", false);
+            model->pause_server_if_no_clients = reader->GetBoolean("pause_server_if_no_clients", false);
         }
     }
 
@@ -404,6 +405,7 @@ namespace Config
         writer->WriteBoolean("known_keys_only", model->known_keys_only);
         writer->WriteBoolean("log_chat", model->log_chat);
         writer->WriteBoolean("log_server_actions", model->log_server_actions);
+        writer->WriteBoolean("pause_server_if_no_clients", model->pause_server_if_no_clients);
     }
 
     static void ReadNotifications(IIniReader * reader)
diff --git a/src/openrct2/config/Config.h b/src/openrct2/config/Config.h
index 23ed4adeaf..f6b1f66b38 100644
--- a/src/openrct2/config/Config.h
+++ b/src/openrct2/config/Config.h
@@ -152,6 +152,7 @@ typedef struct NetworkConfiguration
     bool        known_keys_only;
     bool        log_chat;
     bool        log_server_actions;
+    bool        pause_server_if_no_clients;
 } NetworkConfiguration;
 
 typedef struct NotificationConfiguration
diff --git a/src/openrct2/network/Network.cpp b/src/openrct2/network/Network.cpp
index 26bf788d89..4eed927c3a 100644
--- a/src/openrct2/network/Network.cpp
+++ b/src/openrct2/network/Network.cpp
@@ -351,6 +351,11 @@ bool Network::BeginServer(uint16 port, const char* address)
         _advertiser = CreateServerAdvertiser(listening_port);
     }
 
+    if (gConfigNetwork.pause_server_if_no_clients)
+    {
+        game_do_command(0, 1, 0, 0, GAME_COMMAND_TOGGLE_PAUSE, 0, 0);
+    }
+
     return true;
 }
 
@@ -1502,6 +1507,10 @@ void Network::EnqueueGameAction(const GameAction *action)
 
 void Network::AddClient(ITcpSocket * socket)
 {
+    if (gConfigNetwork.pause_server_if_no_clients && game_is_paused())
+    {
+        game_do_command(0, 1, 0, 0, GAME_COMMAND_TOGGLE_PAUSE, 0, 0);
+    }
     auto connection = std::make_unique<NetworkConnection>();
     connection->Socket = socket;
     char addr[128];
@@ -1540,6 +1549,10 @@ void Network::RemoveClient(std::unique_ptr<NetworkConnection>& connection)
                           return player.get() == connection_player;
                       }), player_list.end());
     client_connection_list.remove(connection);
+    if (gConfigNetwork.pause_server_if_no_clients && game_is_not_paused() && client_connection_list.size() == 0)
+    {
+        game_do_command(0, 1, 0, 0, GAME_COMMAND_TOGGLE_PAUSE, 0, 0);
+    }
     Server_Send_PLAYERLIST();
 }