From a70aa5df4938a6a4459690c4666a5c39a3f5bf98 Mon Sep 17 00:00:00 2001
From: Stephan <5377412+Taschi120@users.noreply.github.com>
Date: Fri, 9 Jul 2021 21:44:02 +0200
Subject: Add #9188: netsave now keeps multiple version around, similar to
 autosave (#9395)

---
 src/network/network_client.cpp |  8 ++------
 src/openttd.cpp                | 20 ++------------------
 src/saveload/saveload.cpp      | 34 ++++++++++++++++++++++++++++++++++
 src/saveload/saveload.h        |  2 ++
 4 files changed, 40 insertions(+), 24 deletions(-)

diff --git a/src/network/network_client.cpp b/src/network/network_client.cpp
index 779ffe6fd..fe4d1249c 100644
--- a/src/network/network_client.cpp
+++ b/src/network/network_client.cpp
@@ -132,12 +132,8 @@ struct PacketReader : LoadFilter {
  */
 void ClientNetworkEmergencySave()
 {
-	if (!_settings_client.gui.autosave_on_network_disconnect) return;
-	if (!_networking) return;
-
-	const char *filename = "netsave.sav";
-	Debug(net, 3, "Performing emergency save: {}", filename);
-	SaveOrLoad(filename, SLO_SAVE, DFT_GAME_FILE, AUTOSAVE_DIR, false);
+	static int _netsave_ctr = 0;
+	DoAutoOrNetsave(_netsave_ctr, true);
 }
 
 
diff --git a/src/openttd.cpp b/src/openttd.cpp
index aba1ae986..904cdbbb1 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1392,24 +1392,8 @@ void StateGameLoop()
  */
 static void DoAutosave()
 {
-	char buf[MAX_PATH];
-
-	if (_settings_client.gui.keep_all_autosave) {
-		GenerateDefaultSaveName(buf, lastof(buf));
-		strecat(buf, ".sav", lastof(buf));
-	} else {
-		static int _autosave_ctr = 0;
-
-		/* generate a savegame name and number according to _settings_client.gui.max_num_autosaves */
-		seprintf(buf, lastof(buf), "autosave%d.sav", _autosave_ctr);
-
-		if (++_autosave_ctr >= _settings_client.gui.max_num_autosaves) _autosave_ctr = 0;
-	}
-
-	Debug(sl, 2, "Autosaving to '{}'", buf);
-	if (SaveOrLoad(buf, SLO_SAVE, DFT_GAME_FILE, AUTOSAVE_DIR) != SL_OK) {
-		ShowErrorMessage(STR_ERROR_AUTOSAVE_FAILED, INVALID_STRING_ID, WL_ERROR);
-	}
+	static int _autosave_ctr = 0;
+	DoAutoOrNetsave(_autosave_ctr);
 }
 
 /**
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index 74978c4db..d771bf526 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -3323,6 +3323,40 @@ SaveOrLoadResult SaveOrLoad(const std::string &filename, SaveLoadOperation fop,
 	}
 }
 
+/**
+ * Create an autosave or netsave.
+ * @param counter A reference to the counter variable to be used for rotating the file name.
+ * @param netsave Indicates if this is a regular autosave or a netsave.
+ */
+void DoAutoOrNetsave(int &counter, bool netsave)
+{
+	char buf[MAX_PATH];
+
+	if (_settings_client.gui.keep_all_autosave) {
+		GenerateDefaultSaveName(buf, lastof(buf));
+		if (!netsave) {
+			strecat(buf, ".sav", lastof(buf));
+		} else {
+			strecat(buf, "-netsave.sav", lastof(buf));
+		}
+	} else {
+		/* Generate a savegame name and number according to _settings_client.gui.max_num_autosaves. */
+		if (!netsave) {
+			seprintf(buf, lastof(buf), "autosave%d.sav", counter);
+		} else {
+			seprintf(buf, lastof(buf), "netsave%d.sav", counter);
+		}
+
+		if (++counter >= _settings_client.gui.max_num_autosaves) counter = 0;
+	}
+
+	Debug(sl, 2, "Autosaving to '{}'", buf);
+	if (SaveOrLoad(buf, SLO_SAVE, DFT_GAME_FILE, AUTOSAVE_DIR) != SL_OK) {
+		ShowErrorMessage(STR_ERROR_AUTOSAVE_FAILED, INVALID_STRING_ID, WL_ERROR);
+	}
+}
+
+
 /** Do a save when exiting the game (_settings_client.gui.autosave_on_exit) */
 void DoExitSave()
 {
diff --git a/src/saveload/saveload.h b/src/saveload/saveload.h
index 7fc802713..d79bc1416 100644
--- a/src/saveload/saveload.h
+++ b/src/saveload/saveload.h
@@ -381,6 +381,8 @@ void WaitTillSaved();
 void ProcessAsyncSaveFinish();
 void DoExitSave();
 
+void DoAutoOrNetsave(int &counter, bool netsave = false);
+
 SaveOrLoadResult SaveWithFilter(struct SaveFilter *writer, bool threaded);
 SaveOrLoadResult LoadWithFilter(struct LoadFilter *reader);
 
-- 
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