From 40f85073420460b4e8ed20b7f0d3b56712d8a732 Mon Sep 17 00:00:00 2001
From: Sergii Pylypenko <x.pelya.x@gmail.com>
Date: Sun, 19 Dec 2021 02:37:05 +0200
Subject: [PATCH] Emscripten: Download savegames automatically

---
 src/openttd.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/openttd.cpp b/src/openttd.cpp
index a4adfa6b3d..5399062575 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1158,6 +1158,26 @@ void ProcessCloudSaveFromVideoThread()
 		int status = 0;
 #ifdef __ANDROID__
 		status = SDL_ANDROID_CloudSave(_file_to_saveload.name.c_str(), lastPart, "OpenTTD", lastPart, screenshotFile.c_str(), playedTime);
+#endif
+#ifdef __EMSCRIPTEN__
+		FILE *ff = fopen(_file_to_saveload.name.c_str(), "rb");
+		if (ff) {
+			fseek(ff, 0, SEEK_END);
+			long size = ftell(ff);
+			std::unique_ptr<byte[]> data(new byte[size]);
+			fseek(ff, 0, SEEK_SET);
+			fread(data.get(), 1, size, ff);
+			fclose(ff);
+			EM_ASM( {
+				const blob = new Blob([new Uint8Array(Module.HEAPU8.buffer, $0, $1)], {type: "application/octet-stream"});
+				const elem = window.document.createElement("a");
+				elem.href = window.URL.createObjectURL(blob);
+				elem.download = UTF8ToString($2);
+				document.body.appendChild(elem);
+				elem.click();
+				document.body.removeChild(elem);
+			}, data.get(), size, lastPart );
+		}
 #endif
 		if (_settings_client.gui.save_to_network == 2) {
 			_settings_client.gui.save_to_network = status ? 1 : 0;