preserves/implementations/javascript/src/text.ts

import { Value } from './values';

export function stringify(x: any): string {
    if (typeof x?.asPreservesText === 'function') {
        return x.asPreservesText();
    } else {
        try {
            return JSON.stringify(x);
        } catch (_e) {
            return ('' + x).asPreservesText();
        }
    }
}

export function preserves(pieces: TemplateStringsArray, ...values: Value<any>[]): string {
    const result = [pieces[0]];
    values.forEach((v, i) => {
        result.push(stringify(v));
        result.push(pieces[i + 1]);
    });
    return result.join('');
}