the prompt and command input works but the history does not

src/components/client/shell/command/list.ts

@@ -1,28 +1,47 @@
-import type { JSX } from "react"
 import { bold } from "../color"
 import { get_working_dir_name_full, set_working_dir, SetDirStatus } from "../fs/fn"
 
-type args = string[]
-type command = JSX.Element | boolean
+import create from "../../elements/create"
 
-function parse_ls(entries: JSX.Element[]) {
-	return <div className="horizontal-display">
+type Term = HTMLElement
+type Args = string[]
 
-	</div>
+function strout(term: Term, s: string) {
+	const p = create("p")
+	p.innerText = s
+	term.appendChild(p)
 }
 
-function cd(args: args): command {
+function clear(term: Term, args: Args): boolean {
+	Array.from(term.children).forEach(node => {
+		if (node.tagName === "DIV") {
+			if (node.className === "shell-prompt") {
+				const input = node.getElementsByClassName("shell-ps1")[0] as HTMLInputElement
+				if (input.disabled || input.value === "clear") {
+					node.remove()
+				}
+			} else {
+				node.remove()
+			}
+		} else if (node.tagName === "P") {
+			node.remove()
+		}
+	})
+	return true
+}
+
+function cd(term: Term, args: Args): boolean {
 	const new_dir_status = set_working_dir(args[1])
 
 	if (new_dir_status === SetDirStatus.NotADirectory) {
-		return <p>{"cd: \""}{bold(args[1])}{"\" is not a directory"}</p>
+		// return <p>{"cd: \""}{bold(args[1])}{"\" is not a directory"}</p>
 	} else if (new_dir_status === SetDirStatus.NotFound) {
-		return <p>{"cd: The directory \""}{bold(args[1])}{"\" does not exist"}</p>
+		// return <p>{"cd: The directory \""}{bold(args[1])}{"\" does not exist"}</p>
 	}
 	return true
 }
 
-function ls(args: args): command {
+function ls(term: Term, args: Args): boolean {
 	// if (args[1] === undefined) {
 	// 	for (const dir_name in working_dir) {
 
@@ -32,22 +51,26 @@ function ls(args: args): command {
 	return true
 }
 
-function pwd(args: args): command {
-	return <p>{`${get_working_dir_name_full()}`}</p>
-}
-
-function cat(args: args): command {
+function pwd(term: Term, args: Args): boolean {
+	strout(term, get_working_dir_name_full())
 	return true
 }
 
-interface commands_list {
-	[index: string]: (args: args) => command
+function cat(term: Term, args: Args): boolean {
+	return true
 }
-const commands: commands_list = {
+
+type Command = (term: Term, args: Args) => boolean
+interface CommandsList {
+	[index: string]: Command,
+}
+const commands: CommandsList = {
+	["clear"]: clear,
 	["cd"]: cd,
 	["ls"]: ls,
 	["pwd"]: pwd,
 	["cat"]: cat,
 }
 
-export default commands
+export default commands
+export { type Command }

src/components/client/shell/command/parse.ts

@@ -0,0 +1,14 @@
+function trim(stdin: string): string {
+	const trimmed_str: string[] = []
+	stdin.split(" ").forEach(s => { if (s !== "") { trimmed_str.push(s) } })
+	return trimmed_str.join(" ")
+}
+
+function to_args(trimmed_str: string): string[] {
+	return trimmed_str.split(" ")
+}
+
+export {
+	trim,
+	to_args
+}

src/components/client/shell/command/run.ts

@@ -1,37 +1,37 @@
-import type { JSX } from "react";
-import commands from "./list";
 import { bold } from "../color";
+import { to_args, trim } from "./parse";
 
-function trim(stdin: string): string {
-	const trimmed_str: string[] = []
-	stdin.split(" ").forEach(s => { if (s !== "") { trimmed_str.push(s) } })
-	return trimmed_str.join(" ")
-}
+import commands, { type Command } from "./list";
+import create from "../../elements/create";
+import history from "../history";
 
-function to_args(trimmed_str: string): string[] {
-	return trimmed_str.split(" ")
-}
+type Term = HTMLElement
 
-function valid_command(args: string[]): JSX.Element | undefined {
+function valid_command(term: Term, args: string[]) {
 	for (const command_in_list in commands) {
 		const command = args[0]
 		if (command === command_in_list) {
-			return commands[command_in_list](args)
+			return (commands[command_in_list] as Command)(term, args)
 		}
 	}
 	return
 }
 
 function unknown_command(cmd_name: string) {
-	return <p>{"shell: Unknown command: "}{bold(cmd_name)}</p>
+	const unknown_element = create("p")
+	unknown_element.innerText = "shell: Unknown command: "
+	unknown_element.appendChild(bold(cmd_name))
+	return unknown_element
 }
 
-export default function run(stdin: string) {
+export default function run(term: Term, stdin: string) {
 	const args = to_args(trim(stdin))
-	const command = valid_command(args)
+	const valid = valid_command(term, args)
+	const command = args[0] as string
 
-	if (args[0] !== "" && !command) {
-		return unknown_command(args[0])
+	if (command !== "" && !valid) {
+		return unknown_command(command)
 	}
-	return command ? command : <></>
+	history.add(args.join(" "))
+	return false
 }

src/components/client/shell/events.ts

@@ -1,35 +0,0 @@
-import Display from "./prompt"
-import run from "./command/run"
-
-const enum Key {
-	Enter     = "Enter",
-	ArrowUp   = "ArrowUp",
-	ArrowDown = "ArrowDown",
-	Tab       = "Tab"
-}
-
-function keyboard_events(terminal_window: HTMLElement, new_elements_f: newElement) {
-	const terminal_event = (keyboard_event: KeyboardEvent) => {
-		if (keyboard_event.key === Key.Enter) {
-			keyboard_event.preventDefault()
-			const current_prompt = get_current_prompt()
-			if (current_prompt) {
-				const prompt = new_prompt()
-				const output = run(current_prompt.value)
-				new_elements_f([output, prompt])
-				terminal_window.removeEventListener("keydown", terminal_event)
-			}
-		} else if (keyboard_event.key === Key.ArrowUp) {
-			keyboard_event.preventDefault()
-		} else if (keyboard_event.key === Key.ArrowDown) {
-			keyboard_event.preventDefault()
-		} else if (keyboard_event.key === Key.Tab) {
-			keyboard_event.preventDefault()
-		}
-	}
-	terminal_window.addEventListener("keydown", terminal_event)
-}
-
-export {
-	keyboard_events,
-}

src/components/client/shell/fs/fn.ts

@@ -2,7 +2,7 @@ import { Entry, EntryType, fs, type FsEntrySignature } from "./fs"
 
 let working_dir = ["/", "home", "user"]
 
-function get_working_dir_name(): string {
+function get_working_dir_name() {
 	return working_dir[working_dir.length-1]
 }
 
@@ -29,7 +29,7 @@ function iter_fs_to_goal(w_dir_clone: string[]): FsIterEntry {
 
 	for (const w_dir of w_dir_clone) {
 		if (w_dir === "/") { continue }
-		if (next_iter.inner) {
+		if (next_iter && next_iter.inner) {
 			const found = next_iter.inner.find(entry => entry.name === w_dir)
 
 			if (!found) {

src/components/client/shell/prompt.ts

@@ -1,23 +0,0 @@
-import { get_working_dir_name } from "./fs/fn"
-import { cyan, green } from "./color"
-
-const userAgent = navigator.userAgent
-const browser_name_fallible = userAgent.match(/Firefox.\d+[\d.\d]+|Chrome.\d+[\d.\d]+/gm)?.map(f => f.split("/")[0])
-
-let browser_name = "unknown"
-if (browser_name_fallible) {
-	browser_name = browser_name_fallible[0] === "Firefox" ? "gecko" : "chromium"
-}
-
-function working_dir() {
-	const name = get_working_dir_name()
-	return name === "user" ? "~" : name
-}
-
-export default function Display() {
-	const user = cyan("user")
-	const dir = green(working_dir())
-	return <p>{user}@{browser_name} {dir}{"> "}</p>
-}
-
-export { userAgent }

src/components/client/terminal.ts

@@ -1,42 +1,91 @@
-// import { red } from "../shell/color"
-// import { display_prompt, keyboard_events } from "../shell/events"
+import { history_list } from "./shell/history"
 
 import prompt from "./elements/prompt"
-// import run from "./shell/command/run"
+import run from "./shell/command/run"
 
-const terminal_window = document.querySelector("main")
+let history_index = 0
 
+const term_win_unsafe = document.querySelector("main")
 const enum Key {
-	Enter     = "Enter",
-	ArrowUp   = "ArrowUp",
-	ArrowDown = "ArrowDown",
-	Tab       = "Tab"
-}
-
-function spawnps1(terminal_window_safe: HTMLElement) {
-	const ps1prompt = prompt()
-	terminal_window_safe.appendChild(ps1prompt.body)
-	input_processor(ps1prompt.input)
+	Enter      = "Enter",
+	ArrowRight = "ArrowRight",
+	ArrowUp    = "ArrowUp",
+	ArrowDown  = "ArrowDown",
+	Tab        = "Tab"
 }
 
 type InputClosure = (key_event: KeyboardEvent) => void
-function key_enter(ps1input: HTMLInputElement, key_event: KeyboardEvent, input_closure: InputClosure) {
-	key_event.preventDefault()
-	// run(ps1input.value)
-	ps1input.removeEventListener("keydown", input_closure)
+interface EnterArgs {
+	readonly term_win_safe: HTMLElement,
+	readonly ps1input: HTMLInputElement,
+	readonly closure: InputClosure
+}
+function key_enter(input: EnterArgs) {
+	const unknown_command_msg = run(input.term_win_safe, input.ps1input.value)
+
+	if (unknown_command_msg) {
+		input.term_win_safe.appendChild(unknown_command_msg)
+	}
+	input.ps1input.removeEventListener("keydown", input.closure)
+	spawnps1(input.term_win_safe)
 }
 
-function input_processor(ps1input: HTMLInputElement) {
-	const input_closure = (key_event: KeyboardEvent) => {
-		if (key_event.key === Key.Enter) {
-			key_enter(ps1input, key_event, input_closure)
+function key_up_arrow(ps1input: HTMLInputElement) {
+	const history_item = history_list[history_index]
+	if (history_item) {
+		ps1input.value = history_item
+		history_index+=1
+	}
+}
+
+function key_down_arrow(ps1input: HTMLInputElement) {
+	const history_item = history_list[history_index]
+	if (history_item) {
+		history_index-=1
+		if (history_index === -1) {
+			history_index = 0
+		} else {
+			ps1input.value = history_item
 		}
 	}
-	ps1input.addEventListener("keydown", input_closure)
 }
 
-if (terminal_window) {
-	spawnps1(terminal_window)
+function spawnps1(term_win_safe: HTMLElement) {
+	const ps1prompt = prompt()
+	term_win_safe.appendChild(ps1prompt.body)
+	bind_processor(term_win_safe, ps1prompt.input)
+	history_index = 0
+	ps1prompt.input.focus()
+}
+
+function bind_processor(term_win_safe: HTMLElement, ps1prompt_input: HTMLInputElement) {
+	const input_closure = (key_event: KeyboardEvent) => {
+		if (key_event.key === Key.Enter) {
+			key_event.preventDefault()
+			key_enter({
+				term_win_safe: term_win_safe,
+				ps1input: ps1prompt_input,
+				closure: input_closure
+			})
+		} else if (key_event.key === Key.Tab) {
+			key_event.preventDefault()
+
+		} else if (key_event.key === Key.ArrowRight) {
+			key_event.preventDefault()
+
+		} else if (key_event.key === Key.ArrowUp) {
+			key_event.preventDefault()
+			key_up_arrow(ps1prompt_input)
+		} else if (key_event.key === Key.ArrowDown) {
+			key_event.preventDefault()
+			key_down_arrow(ps1prompt_input)
+		}
+	}
+	ps1prompt_input.addEventListener("keydown", input_closure)
+}
+
+if (term_win_unsafe) {
+	spawnps1(term_win_unsafe)
 } else {
 
 }