1// The sample map songs load (`samples('jev-samples/strudel.json')`), from the
2// repo's samples/ folder, one folder per sound. One builder for both of its
3// makers: the site's route (pages/jev-samples/strudel.json.js, from Vite's
4// glob) and the headless tools measuring a worktree's own samples
5// (tools/worktree-samples/, from the disk), so the two cannot drift.
6
7// The files a sound is made of. The site's glob names the same list (a glob
8// pattern must be a literal there); sampleMap.test.mjs holds the two together.
9export const SAMPLE_EXTENSIONS = ['mp3', 'wav', 'ogg'];
10
11// `files`: [path, url] pairs, `path` ending in `samples/<sound>/<file>`,
12// `url` where the page fetches it. Strudel prefixes every entry with
13// `_base`, so a url's leading slash and query are dropped.
14export function sampleMap(files) {
15  const map = { _base: '/' };
16  for (const [path, url] of [...files].sort(([a], [b]) => a.localeCompare(b))) {
17    const sound = path.split('/').at(-2);
18    (map[sound] ??= []).push(url.replace(/^\//, '').replace(/\?.*$/, ''));
19  }
20  return map;
21}