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import readline, { Key } from 'node:readline';
import chalk from "chalk";
readline.emitKeypressEvents(process.stdin);
const logs: string[] = [];
function onexit() {
console.clear()
console.log("\nQuitting meower CL")
for (const log of logs) {
console.log(log)
}
}
abstract class Element {
focusable: boolean = false;
focused: boolean = false;
screen: Screen;
abstract render(): void;
onkeypres(key: Key): void {};
}
class Text extends Element {
text: string;
constructor(text: string) {
super();
this.text = text;
}
render() {
process.stdout.write(this.text)
}
}
class Input extends Element {
focusable: boolean = true;
value: string = "";
isPassword: boolean = false;
render(): void {
let text = this.value
if (this.isPassword) text = text.replace(/[^]/g, '*');
if (this.focused) text += "_"
console.log(text)
}
onkeypres(key: Key): void {
//@ts-ignore
if (key.meta || key.code || ["return", "backspace"].includes(key.name)) {
switch (key.name) {
case "return":
this.focused = false;
const focusableIDs = Object.keys(this.screen.getFocusable());
const focusedIndex = focusableIDs.indexOf(this.screen.focusedElementId);
this.screen.focus(focusableIDs[(focusedIndex - 1) % focusableIDs.length]);
break;
case "backspace":
const prevValue = '' + this.value
// logs.push(`doing backspace : before ${prevValue}, after ${prevValue.substring(0, prevValue.length - 1)} : 0-${prevValue.length - 1}`)
this.value = prevValue.substring(0, prevValue.length - 1)
break;
}
return;
}
if (!key.sequence || key.sequence.length > 1 || key.name != key.sequence?.toLowerCase()) return;
this.value += key.sequence;
}
constructor(isPassword: boolean, ) {
super()
this.isPassword = isPassword
}
}
class Button extends Text {
focusable: boolean = true;
constructor (text: string) {
super(text)
}
render(): void {
console.log(`(${(this.focused ? chalk.bgWhite : a=>a)(this.text)})`)
}
}
class Screen {
elements: Map<string, Element> = new Map<string, Element>();
name: string;
focusedElementId: string = '';
constructor(name: string) {
this.name = name
}
addElement(name: string, element: Element) {
if(this.elements.has(name)) throw new Error();
element.screen = this;
this.elements.set(name, element);
}
render() {
console.clear()
this.elements.forEach(element => {
element.render()
});
}
getFocusable() {
return Object.fromEntries([...this.elements.entries()].filter(([k, v]) => v.focusable))
}
getElements() {
return Object.fromEntries([...this.elements.entries()])
}
focus(id: string) {
this.elements.forEach(e => e.focused = false);
const focusElem = this.elements.get(id) as Element
focusElem.focused = true;
this.focusedElementId = id
}
getFocusedElement(): Element|undefined {
return this.focusedElementId ? this.elements.get(this.focusedElementId) as Element : undefined
}
}
// TODO: add focus change with arrows
const screen = new Screen("login");
screen.addElement('username-label', new Text("Username: \n"));
screen.addElement('username-input', new Input(false))
screen.addElement('password-label', new Text("Password: \n"));
screen.addElement('password-input', new Input(true))
screen.addElement('done-btn', new Button("Done"))
screen.focus('username-input')
if (process.stdin.isTTY) process.stdin.setRawMode(true); // makes the terminal send stdin without the user pressing enter
process.stdin.on('keypress', (chunk, key) => {
const focusableIDs = Object.keys(screen.getFocusable());
const focusedIndex = focusableIDs.indexOf(screen.focusedElementId);
if (key && key.name == 'escape') {
onexit();
process.exit();
}
if (['up', 'left'].includes(key.name)) {
// logs.push(`Got up key, moving focus upward ${focusedIndex} ${(focusedIndex - 1) % focusableIDs.length}`)
screen.focus(focusableIDs[(focusedIndex - 1) % focusableIDs.length]);
return screen.render()
}
if (['down', 'right'].includes(key.name)) {
// logs.push(`Got down key, moving focus downward ${focusedIndex} ${(focusedIndex + 1) % focusableIDs.length}`)
screen.focus(focusableIDs[(focusedIndex + 1) % focusableIDs.length]);
return screen.render()
}
// logs.push("pressed key, data: " + JSON.stringify(key))
if (!screen.focusedElementId) return;
const focusedElement = screen.getFocusedElement();
focusedElement?.onkeypres(key)
screen.render()
});
screen.render()
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