wren/glyph Public Public: anyone can read this; nobody can change it.

/**

 * The app in a terminal. The forge runs this on a pty when someone `ssh`es

 * to the app, over the same data as the page and through the same actions,

 * as the account at the keyboard. A terminal cannot show a drawing, so it

 * keeps the list: j/k move, n asks for a new one, d removes the one under

 * the cursor, r reloads, q leaves. The page shows what was drawn.

 */

import {

  deleteDrawing,

  listDrawings,

  startDrawing,

  svgsOf,

  type Drawing,

} from "./actions.ts";

import { openDb } from "./db.ts";

import { drawerFromEnv, setDrawer } from "./draw.ts";

import { dataDir, publicOrigin, ssh, title, where } from "./env.ts";

import { nameOf } from "./glyph.ts";

import { whoAtTty } from "./who.ts";

const db = openDb();

const drawer = drawerFromEnv(dataDir);

if (drawer !== undefined) setDrawer(drawer);

const me = whoAtTty();

const esc = "\x1b[";

const dim = (s: string): string => `${esc}2m${s}${esc}0m`;

const bold = (s: string): string => `${esc}1m${s}${esc}0m`;

const out = (s: string): void => {

  process.stdout.write(s);

};

let cursor = 0;

let typing: string | undefined;

let said = "";

const drawings = (): Drawing[] => {

  const listed = listDrawings(db, me);

  return listed.ok ? listed.value : [];

};

const state = (d: Drawing): string =>

  d.status === "done"

    ? svgsOf(d).map(nameOf).join(" · ")

    : d.status === "drawing"

      ? "drawing…"

      : `failed: ${d.error ?? ""}`;

function draw(): void {

  const rows = drawings();

  const lines = [

    `${bold(title)}  ${dim(where)}  ${dim(me.role === "anon" ? "guest" : `${me.name}${me.role === "admin" ? " (admin)" : ""}`)}`,

    ssh === undefined ? "" : dim(`connect: ${ssh}`),

    dim(`see them at ${publicOrigin}`),

    "",

  ];

  if (rows.length === 0)

    lines.push(dim(me.role === "anon" ? "Sign in to draw." : "Nothing drawn yet. Press n."));

  rows.forEach((d, i) => {

    const prompt = i === cursor ? bold(d.prompt) : d.prompt;

    lines.push(`${i === cursor ? "▸" : " "} ${prompt}  ${dim(`${d.kind} · ${state(d)}`)}`);

  });

  lines.push("");

  if (typing !== undefined) lines.push(`Draw: ${typing}${esc}7m ${esc}0m`);

  else if (said !== "") lines.push(said);

  else lines.push(dim("j/k move · n new · d delete · r reload · q quit"));

  out(`${esc}2J${esc}H${lines.join("\r\n")}`);

}

process.stdin.setRawMode?.(true);

process.stdin.resume();

process.stdin.setEncoding("utf8");

draw();

// Claude answers in this process too: redraw now and then while one is out.

setInterval(() => {

  if (typing === undefined && drawings().some((d) => d.status === "drawing")) draw();

}, 3000);

process.stdin.on("data", (key: string) => {

  said = "";

  if (typing !== undefined) {

    if (key === "\r") {

      const started = startDrawing(db, me, { prompt: typing });

      said = started.ok ? "Drawing… it shows here and on the page when Claude is done." : started.message;

      typing = undefined;

      cursor = 0;

    } else if (key === "\x1b") typing = undefined;

    else if (key === "\x7f") typing = typing.slice(0, -1);

    else if (key >= " ") typing += key;

    draw();

    return;

  }

  if (key === "q" || key === "\x03") {

    out(`${esc}2J${esc}H`);

    process.exit(0);

  }

  const rows = drawings();

  if (key === "j" || key === "\x1b[B") cursor = Math.min(cursor + 1, Math.max(0, rows.length - 1));

  if (key === "k" || key === "\x1b[A") cursor = Math.max(cursor - 1, 0);

  if (key === "n") {

    if (me.role === "anon") said = "Sign in to draw.";

    else typing = "";

  }

  if (key === "d") {

    const d = rows[cursor];

    if (d === undefined) said = "Nothing to remove.";

    else {

      const removed = deleteDrawing(db, me, { id: d.id });

      if (!removed.ok) said = removed.message;

      cursor = Math.min(cursor, Math.max(0, rows.length - 2));

    }

  }

  draw();

});

process.stdout.on("resize", draw);