move rfwfs into rt

src/rt/rfwfs/library.ts

@@ -0,0 +1,85 @@
+import { type FsDirectory, type FsEntry } from "./core"
+
+import fstree from "./tree"
+import index from "./index"
+
+let cached_dir = fstree[0] //start at root
+let working_path = ["/", "home", "user"]
+
+const clone_working_path = () => [...working_path]
+
+function get_working_dir_name() {
+	return working_path[working_path.length-1]
+}
+
+function get_working_dir_name_full(): string {
+	const w_dir_clone = clone_working_path()
+	const root = w_dir_clone.shift()
+	if (root) {
+		return root+w_dir_clone.join("/")
+	}
+	return "shift-error"
+}
+
+const enum SetDirStatus {
+	Valid,
+	NotFound,
+	NotADirectory,
+	Invalid
+}
+interface FsIterEntry {
+	readonly entry: FsDirectory | null,
+	readonly status: SetDirStatus
+}
+function find_fs_dir(working_dir_path_clone: string[], find_dir_name: string): FsIterEntry {
+	let cached_dir_clone = cached_dir.inner
+
+	for (let path_i = 0; path_i<working_dir_path_clone.length; path_i++) {
+		if (cached_dir_clone) {
+			let cached_dir_file_names: string[] = []
+			cached_dir_clone.forEach((file, file_i) => cached_dir_file_names.push(file.name))
+
+			const search_result = index.binary(cached_dir_clone, fstree[0])
+
+			if (working_dir_path_clone[path_i] === find_dir_name) {
+				cached_dir_clone = cached_dir_clone
+				if (path_i === working_dir_path_clone.length) {
+					const search_result = index.binary(cached_dir_file_names, find_dir_name)
+					if (search_result) {
+
+					}
+				} else {
+					continue
+				}
+			}
+		}
+		return { entry: null, status: SetDirStatus.Invalid }
+	}
+	return { entry: null, status: SetDirStatus.NotFound }
+}
+
+function set_working_dir(name: string): SetDirStatus {
+	if (name === ".") { return SetDirStatus.Valid }
+
+	const w_dir_clone = clone_working_path()
+	if (name === "..") {
+		w_dir_clone.pop()
+
+	} else {
+		w_dir_clone.push(name)
+	}
+
+
+}
+
+function get_working_dir_entries(): FsEntry[] {
+
+}
+
+export {
+	get_working_dir_name,
+	get_working_dir_name_full,
+	get_working_dir_entries,
+	set_working_dir,
+	SetDirStatus
+}