Initial commit

backends/fs/emscripten/emscripten-fs-factory.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef EMSCRIPTEN
+
+#define FORBIDDEN_SYMBOL_EXCEPTION_getenv
+#define FORBIDDEN_SYMBOL_EXCEPTION_FILE
+#include "backends/fs/emscripten/emscripten-fs-factory.h"
+#include "backends/fs/emscripten/emscripten-posix-fs.h"
+#include "backends/fs/emscripten/http-fs.h"
+#include "common/debug.h"
+#ifdef USE_CLOUD
+#include "backends/fs/emscripten/cloud-fs.h"
+#endif
+
+#include <emscripten.h>
+
+EM_ASYNC_JS(void, _initSettings, (const char *pathPtr), {
+	try {
+		const path = UTF8ToString(pathPtr);
+		const settingsPath = path + "/scummvm.ini";
+		
+		// Mount the filesystem
+		FS.mount(IDBFS, { autoPersist: true }, path);
+		
+		// Sync the filesystem
+		await new Promise((resolve, reject) => {
+			FS.syncfs(true, (err) => err ? reject(err) : resolve());
+		});
+		
+		// Check if settings file exists and download if needed
+		if (!FS.analyzePath(settingsPath).exists) {
+			const response = await fetch("scummvm.ini");
+			if (response.ok) {
+				const text = await response.text();
+				FS.writeFile(settingsPath, text);
+			}
+		}
+	} catch (err) {
+		console.error("Error initializing files:", err);
+		alert("Error initializing files: " + err);
+		throw err;
+	}
+});
+
+EmscriptenFilesystemFactory::EmscriptenFilesystemFactory() {
+	_initSettings(getenv("HOME"));
+	_httpNodes = new Common::HashMap<Common::String, HTTPFilesystemNode *>();
+}
+
+AbstractFSNode *EmscriptenFilesystemFactory::makeCurrentDirectoryFileNode() const {
+	// getcwd() defaults to root on emscripten and ScummVM doesn't use setcwd()
+	return makeRootFileNode();
+}
+
+AbstractFSNode *EmscriptenFilesystemFactory::makeRootFileNode() const {
+	return new EmscriptenPOSIXFilesystemNode("/");
+}
+
+AbstractFSNode *EmscriptenFilesystemFactory::makeFileNodePath(const Common::String &path) const {
+	debug(5, "EmscriptenFilesystemFactory::makeFileNodePath(%s)", path.c_str());
+	assert(!path.empty());
+	if (path.hasPrefix(DATA_PATH)) {
+		if (!_httpNodes->contains(path)) {
+			// finding a node by path requires a http request to the server, so we cache the nodes
+			_httpNodes->setVal(path, new HTTPFilesystemNode(path));
+		}
+		return new HTTPFilesystemNode(*(_httpNodes->getVal(path)));
+#ifdef USE_CLOUD
+	} else if (path.hasPrefix(CLOUD_FS_PATH) && CloudMan.isStorageEnabled()) {
+		return new CloudFilesystemNode(path);
+#endif
+	} else {
+		return new EmscriptenPOSIXFilesystemNode(path);
+	}
+}
+#endif