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Client-side only: every file is still its own standard m.image/m.video event, so Element and friends keep seeing N plain images. In Lotus a run of media from one sender — contiguous, ≤ 60 s apart, no reply/thread/edit relation, up to 10 — renders once, at its last event, as a 2–4 column grid of square thumbnails (blurhash placeholder, video play badge, tap-to-load when media auto-load is off). A member with reactions or a thread closes its group so those stay visible under the rendered event. Tapping a tile opens the lightbox on just that group in send order (←/→, zoom, download, jump). "Show separately" splits a group back into individual messages for the session; "Show as gallery" undoes it. Planning is lazy per render pass (utils/mediaGroups.ts, unit-tested): the first media event met plans its whole run in both directions, so a virtual window that starts mid-run agrees with one that starts before it. Verified: 5 files dropped at once in an encrypted room — both sender and recipient see one 5-tile grid with decrypted thumbnails; desktop + phone; a reaction on photo 3 yields [1–3]+👍 and [4–5]. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
120 lines
3.6 KiB
TypeScript
120 lines
3.6 KiB
TypeScript
import { describe, it } from 'node:test';
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import assert from 'node:assert/strict';
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import { GroupCandidate, findMediaRun, planMediaGroups, splitRun } from './mediaGroups';
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const media = (
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sender: string,
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ts: number,
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extra: Partial<GroupCandidate> = {},
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): GroupCandidate => ({
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sender,
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ts,
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kind: 'media',
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hasRelation: false,
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redacted: false,
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mustEnd: false,
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...extra,
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});
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const text = (sender: string, ts: number): GroupCandidate => ({
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...media(sender, ts),
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kind: 'other',
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});
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const skip = (ts: number): GroupCandidate => ({ ...media('x', ts), kind: 'skip' });
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const seq = (items: GroupCandidate[]) => (i: number) => items[i];
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describe('findMediaRun', () => {
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it('collects contiguous same-sender media within the gap, from any member', () => {
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const at = seq([
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text('a', 0),
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media('a', 1000),
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media('a', 2000),
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media('a', 3000),
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text('a', 4000),
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]);
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assert.deepEqual(findMediaRun(at, 1), [1, 2, 3]);
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assert.deepEqual(findMediaRun(at, 2), [1, 2, 3]);
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assert.deepEqual(findMediaRun(at, 3), [1, 2, 3]);
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});
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it('breaks on a different sender, text in between, or a long gap', () => {
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const at = seq([
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media('a', 0),
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media('b', 1000),
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media('a', 2000),
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text('a', 2500),
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media('a', 3000),
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media('a', 70_000),
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]);
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assert.deepEqual(findMediaRun(at, 0), [0]);
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assert.deepEqual(findMediaRun(at, 2), [2]);
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assert.deepEqual(findMediaRun(at, 4), [4]);
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assert.deepEqual(findMediaRun(at, 5), [5]);
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});
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it('skips invisible filler such as reactions and edits', () => {
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const at = seq([media('a', 0), skip(100), skip(200), media('a', 1000)]);
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assert.deepEqual(findMediaRun(at, 0), [0, 3]);
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});
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it('never groups replies, thread messages, edits or redacted events', () => {
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const at = seq([
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media('a', 0),
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media('a', 500, { hasRelation: true }),
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media('a', 1000),
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media('a', 1500, { redacted: true }),
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]);
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assert.deepEqual(findMediaRun(at, 0), [0]);
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assert.deepEqual(findMediaRun(at, 1), []);
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assert.deepEqual(findMediaRun(at, 2), [2]);
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});
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it('measures the gap between consecutive members, not from the first', () => {
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const at = seq([media('a', 0), media('a', 50_000), media('a', 100_000)]);
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assert.deepEqual(findMediaRun(at, 0), [0, 1, 2]);
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});
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});
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describe('splitRun', () => {
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it('caps group size and drops singles', () => {
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const items = Array.from({ length: 12 }, (_, i) => media('a', i * 1000));
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const groups = splitRun(
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Array.from({ length: 12 }, (_, i) => i),
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seq(items),
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10,
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);
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assert.deepEqual(groups, [
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[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
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[10, 11],
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]);
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assert.deepEqual(splitRun([0, 1, 2, 3], seq(items), 3), [[0, 1, 2]]);
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});
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it('closes a group at a member with reactions so they stay visible', () => {
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const items = [
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media('a', 0),
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media('a', 1000, { mustEnd: true }),
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media('a', 2000),
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media('a', 3000),
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];
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assert.deepEqual(splitRun([0, 1, 2, 3], seq(items)), [
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[0, 1],
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[2, 3],
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]);
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});
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});
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describe('planMediaGroups', () => {
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it('marks only the last member as the renderer', () => {
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const at = seq([media('a', 0), media('a', 1000), media('a', 2000)]);
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const plan = planMediaGroups(at, 1);
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assert.equal(plan.get(0)?.renders, false);
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assert.equal(plan.get(1)?.renders, false);
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assert.equal(plan.get(2)?.renders, true);
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assert.deepEqual(plan.get(2)?.members, [0, 1, 2]);
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});
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it('returns an empty plan for a lone image', () => {
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assert.equal(planMediaGroups(seq([text('a', 0), media('a', 1000)]), 1).size, 0);
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});
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});
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