shark/tidepool-utils/fumen-replay.js

import { argv } from 'node:process'
import { readFile } from 'node:fs/promises'
import { encoder as fumenEncoder } from 'tetris-fumen'
import { Simul } from './lib/sim.js'

export async function main(args) {
    if (args.length < 1) {
        throw new Error('no input file specified');
    }

    let buf = await readFile(args[0]);
    let data = JSON.parse(buf.toString('utf-8'));
    if (!data.moves) {
        throw new Error('cannot generate replay without moves; pass --list-moves flag to tidepool');
    }

    let sim = new Simul(data.seed, data.config);
    let pages = [];
    for (let move of data.moves) {
        let mino = {
            type: move.type,
            rotation: {
                N: 'spawn',
                E: 'right',
                S: 'reverse',
                W: 'left',
            }[move.r],
            x: move.x,
            y: move.y,
        };
        pages.push(sim.play(mino));
    }

    console.log(fumenEncoder.encode(pages));
}

main(argv.slice(2));