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feat(room-preview): join-rule + encryption chips, Request-to-join for knock rooms
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Room preview (JoinBeforeNavigate -> RoomCard via getRoomSummary) was already
built and, verified after the Synapse 1.156 upgrade, works via the SDK's unstable
im.nheko.summary endpoint (the old 'blocked' flag tested the wrong /v1 path).

Polish the preview card with the summary fields the endpoint returns:
- join-rule chip (Restricted / Ask to join / Invite only / Private; public shows
  none) + an Encrypted badge (from im.nheko.summary.encryption).
- knock-rule rooms now show a 'Request to join' button (mx.knockRoom) instead of a
  plain Join that would fail — mirrors the RoomIntro knock flow.

Props are optional so other RoomCard usages are unaffected. LOTUS_TODO updated:
Room Preview BLOCKED -> done; Synapse 1.155 -> 1.156.0. 738 tests pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Jared Vititoe
2026-07-07 13:36:41 -04:00
parent a3ca951fba
commit 44420220d4
3 changed files with 67 additions and 17 deletions
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LOTUS_TODO.md
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@@ -138,7 +138,7 @@ After Phases A–C the client spec is ~complete. What's left, flagged by **what
- Live Location Sharing (**MSC3489** + **MSC3672** — both `false`)
- Reaction / relation redaction (**MSC3892** — `false`)
- Room preview before joining (**MSC3266** — summary endpoint 404s on 1.155)
- ~~Room preview before joining (MSC3266)~~ — **DONE** (client was always built; unstable `im.nheko.summary` endpoint returns 200 — verified on 1.156)
- Thread subscriptions (**MSC4306** — `false`)
**Niche / low-value (noted, not planned):** E2EE history-key-on-invite (MSC3061), voice broadcast (MSC3888), a native account-deactivation flow (currently delegated to the OIDC provider for OIDC accounts).
@@ -201,17 +201,17 @@ Re-run `/_matrix/client/versions` + `unstable_features` after each Synapse upgra
- **[BLOCKED] Live Location Sharing** (MSC3489 + MSC3672 both `false`) — real-time GPS beacons over the existing static share.
- **[BLOCKED] Reaction/Relation Redaction** (MSC3892 `false`) — remove a reaction without redacting the parent; current full-redaction fallback is acceptable.
- **[BLOCKED] Room Preview before joining** (MSC3266) — `GET /v1/rooms/{id}/summary` returns 404 `M_UNRECOGNIZED` on Synapse 1.155 despite `msc3266_enabled:true`.
- **[DONE 2026-07] Room Preview before joining** (MSC3266) — the client was always built (`JoinBeforeNavigate` → `RoomCard` via `mx.getRoomSummary`). The earlier "blocked" flag was a **misdiagnosis**: it tested `/v1/rooms/{id}/summary` (404), but the SDK calls the *unstable* `im.nheko.summary/summary/{id}` path, which returns **200** with name/topic/members/join_rule. Verified live after the 1.156 upgrade; also added a join-rule/encryption chip + Request-to-join for knock rooms to the preview card.
- **[BLOCKED] Thread Subscriptions** (MSC4306 `false`) — "Follow thread" button (depends on the shipped Thread Panel).
---
## 📖 Reference
### Server Capabilities (as of 2026-06)
### Server Capabilities (as of 2026-07)
- **Homeserver** `matrix.lotusguild.org` · **Synapse** `1.155.0` · **Matrix spec** up to `v1.12` (+ MSC `unstable_features`).
- **MSC ON:** `msc4140` · `msc3771` · `msc3440.stable` · `msc4133.stable` · `simplified_msc3575` · `msc4222` · `msc3266` (flag on but v1 summary 404s) · `msc3401_matrix_rtc`. **OFF/blocked:** `msc4306` · `msc3882` · `msc3912` · `msc4155` · `msc3489`/`msc3672` · `msc3892`.
- **Homeserver** `matrix.lotusguild.org` · **Synapse** `1.156.0+trixie1` (upgraded 2026-07-07 from 1.155; apt package on Debian 13, LXC 151) · **Matrix spec** up to `v1.12` (Synapse still advertises v1.12; MSC features via `unstable_features`).
- **MSC ON:** `msc4140` · `msc3771` · `msc3440.stable` · `msc4133.stable` · `simplified_msc3575` · `msc4222` · `msc3266` (room summary live at unstable `im.nheko.summary/summary/{id}` — 200; the `/v1/rooms/{id}/summary` path is still 404) · `msc3401_matrix_rtc`. **OFF/blocked:** `msc4306` · `msc3882` · `msc3912` · `msc4155` · `msc3489`/`msc3672` · `msc3892`.
- **Live endpoints:** Report User (MSC4260) **200** ✅ · Report Room (MSC4151) ✅.
- **Homeserver access (audits):** Synapse = LXC 151 (`pct exec 151 -- bash`), config `/etc/matrix-synapse/homeserver.yaml`. Web deploy = LXC 106. Voice guard = `voice-limit-guard.py` on LXC 151.
- **SDK notes:** no arbitrary profile-field methods (use `mx.http.authedRequest()` for MSC4133); js-sdk can't per-room filter `/sync`; sanitizer strips `<math>`/MathML; SW exists at `src/sw.ts`; `getMatrixToRoom()` builds invite URLs; EC audio-inject unblocked via the fork's `io.lotus.inject_audio`.