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

import React from "react";
import { Location } from "../../Locations/Location";
import Grid from "@mui/material/Grid";
import Typography from "@mui/material/Typography";
import Button from "@mui/material/Button";

interface IProps {
  Location: Location;
  Difficulty: number;
  MaxLevel: number;
  start: () => void;
  cancel: () => void;
}

function arrowPart(color: string, length: number): JSX.Element {
  let arrow = "";
  if (length <= 0) length = 0;
  else if (length > 13) length = 13;
  else {
    length--;
    arrow = ">";
  }
  return (
    <span style={{ color: color }}>
      {"=".repeat(length)}
      {arrow}
      {" ".repeat(13 - arrow.length - length)}
    </span>
  );
}

function coloredArrow(difficulty: number): JSX.Element {
  if (difficulty === 0) {
    return (
      <span style={{ color: "white" }}>
        {">"}
        {" ".repeat(38)}
      </span>
    );
  } else {
    return (
      <>
        {arrowPart("white", difficulty * 13)}
        {arrowPart("orange", (difficulty - 1) * 13)}
        {arrowPart("red", (difficulty - 2) * 13)}
      </>
    );
  }
}

export function Intro(props: IProps): React.ReactElement {
  return (
    <>
      <Grid container spacing={3}>
        <Grid item xs={10}>
          <Typography variant="h4">Infiltrating {props.Location.name}</Typography>
        </Grid>
        <Grid item xs={10}>
          <Typography variant="h5" color="primary">
            Maximum level: {props.MaxLevel}
          </Typography>
        </Grid>
        <Grid item xs={10}>
          <Typography sx={{ lineHeight: "1em", whiteSpace: "pre" }}>[{coloredArrow(props.Difficulty)}]</Typography>
          <Typography
            sx={{ lineHeight: "1em", whiteSpace: "pre" }}
          >{` ^            ^            ^           ^`}</Typography>
          <Typography
            sx={{ lineHeight: "1em", whiteSpace: "pre" }}
          >{` Trivial    Normal        Hard    Impossible`}</Typography>
        </Grid>
        <Grid item xs={10}>
          <Typography>
            Infiltration is a series of short minigames that get progressively harder. You take damage for failing them.
            Reaching the maximum level rewards you with intel you can trade for money or reputation.
          </Typography>
          <br />
          <Typography>
            The minigames you play are randomly selected. It might take you few tries to get used to them.
          </Typography>
          <br />
          <Typography>No game require use of the mouse.</Typography>
          <br />
          <Typography>Spacebar is the default action/confirm button.</Typography>
          <br />
          <Typography>Everything that uses arrow can also use WASD</Typography>
          <br />
          <Typography>Sometimes the rest of the keyboard is used.</Typography>
        </Grid>
        <Grid item xs={3}>
          <Button onClick={props.start}>Start</Button>
        </Grid>
        <Grid item xs={3}>
          <Button onClick={props.cancel}>Cancel</Button>
        </Grid>
      </Grid>
    </>
  );
}