bitburner-src/src/Infiltration/ui/SlashGame.tsx

import React, { useState, useEffect } from 'react';
import Grid from '@material-ui/core/Grid';
import { IMinigameProps } from "./IMinigameProps";
import { KeyHandler } from "./KeyHandler";
import { GameTimer } from "./GameTimer";
import { interpolate } from "./Difficulty";

interface Difficulty {
    [key: string]: number;
    window: number;
}

const difficulties: {
    Trivial: Difficulty;
    Normal: Difficulty;
    Hard: Difficulty;
    Impossible: Difficulty;
} = {
    Trivial: {window: 600},
    Normal: {window: 325},
    Hard: {window: 250},
    Impossible: {window: 150},
}

export function SlashGame(props: IMinigameProps): React.ReactElement {
    const difficulty: Difficulty = {window: 0};
    interpolate(difficulties, props.difficulty, difficulty);
    const [guarding, setGuarding] = useState(true);

    function press(event: React.KeyboardEvent<HTMLElement>): void {
        event.preventDefault();
        if(event.keyCode !== 32) return;
        if(guarding) {
            props.onFailure();
        } else {
            props.onSuccess();
        }
    }

    useEffect(() => {
        let id2 = -1;
        const id = window.setTimeout(() => {
            setGuarding(false);
            id2 = window.setTimeout(()=>setGuarding(true), difficulty.window)
        }, Math.random()*3250+1500);
        return () => {
            clearInterval(id);
            if(id2 !== -1) clearInterval(id2);
        }
    }, []);

    return (<Grid container spacing={3}>
        <GameTimer millis={5000} onExpire={props.onFailure} />
        <Grid item xs={12}>
            <h1 className={"noselect"}>Slash when his guard is down!</h1>
            <p style={{fontSize: '5em'}}>{guarding ? "!Guarding!" : "!ATTACKING!"}</p>
            <KeyHandler onKeyDown={press} onFailure={props.onFailure} />
        </Grid>
    </Grid>)
}