Everywhere: Hoist the Libraries folder to the top-level

Libraries/LibCore/ResourceImplementationFile.cpp

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2023, Andrew Kaster <akaster@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/LexicalPath.h>
+#include <AK/StringView.h>
+#include <LibCore/DirIterator.h>
+#include <LibCore/Resource.h>
+#include <LibCore/ResourceImplementationFile.h>
+#include <LibCore/System.h>
+
+namespace Core {
+
+ResourceImplementationFile::ResourceImplementationFile(String base_directory)
+    : m_base_directory(move(base_directory))
+{
+}
+
+ErrorOr<NonnullRefPtr<Resource>> ResourceImplementationFile::load_from_resource_scheme_uri(StringView uri)
+{
+    StringView const resource_scheme = "resource://"sv;
+
+    VERIFY(uri.starts_with(resource_scheme));
+
+    auto path = TRY(String::from_utf8(uri.substring_view(resource_scheme.length())));
+    auto full_path = TRY(String::from_byte_string(LexicalPath::join(m_base_directory, path).string()));
+
+    auto st = TRY(System::stat(full_path));
+
+    if (S_ISDIR(st.st_mode))
+        return make_directory_resource(move(path), st.st_mtime);
+
+    return make_resource(path, TRY(MappedFile::map(full_path)), st.st_mtime);
+}
+
+Vector<String> ResourceImplementationFile::child_names_for_resource_scheme(Resource const& resource)
+{
+    Vector<String> children;
+    Core::DirIterator it(resource.filesystem_path().to_byte_string(), Core::DirIterator::SkipParentAndBaseDir);
+    while (it.has_next())
+        children.append(MUST(String::from_byte_string(it.next_path())));
+
+    return children;
+}
+
+String ResourceImplementationFile::filesystem_path_for_resource_scheme(String const& relative_path)
+{
+    return MUST(String::from_byte_string(LexicalPath::join(m_base_directory, relative_path).string()));
+}
+
+}