json-joy/esm/json-cli/json-unpack.js

Collection of libraries for building collaborative editing apps.

import { readFileSync } from 'fs';
import { MsgPackDecoderFast } from '@jsonjoy.com/json-pack/lib/msgpack';
import { CborDecoder } from '@jsonjoy.com/json-pack/lib/cbor/CborDecoder';
import * as JSONB from '@jsonjoy.com/json-pack/lib/json-binary';
import arg from 'arg';
const args = arg({
    '--format': String,
    '--cbor': Boolean,
}, {
    argv: process.argv,
});
const ALLOWED_FORMATS = new Set(['msgpack', 'messagepack', 'cbor']);
const format = args['--cbor']
    ? 'cbor'
    : String(args['--format'] ?? 'msgpack').toLowerCase();
if (!ALLOWED_FORMATS.has(format))
    throw new Error(`Unknown format: ${format}`);
try {
    switch (format) {
        case 'msgpack':
        case 'messagepack': {
            const decoder = new MsgPackDecoderFast();
            const buf = readFileSync(0);
            const arr = new Uint8Array(buf.length);
            for (let i = 0; i < buf.length; i++)
                arr[i] = buf[i];
            const decoded = decoder.decode(arr);
            const json = JSONB.stringify(decoded);
            process.stdout.write(json);
            break;
        }
        case 'cbor': {
            const decoder = new CborDecoder();
            const buf = readFileSync(0);
            const arr = new Uint8Array(buf.length);
            for (let i = 0; i < buf.length; i++)
                arr[i] = buf[i];
            const decoded = decoder.decode(arr);
            const json = JSONB.stringify(decoded);
            process.stdout.write(json);
            break;
        }
    }
}
catch (error) {
    const output = error instanceof Error ? error.message : String(error);
    process.stderr.write(output + '\n');
    process.exit(1);
}