BackendConnection's ConnectionState enum is now Connecting / Online /
Reconnecting / Offline (PLAN.md §5). The probe loop tracks the first
failure since the last Online and transitions to Reconnecting on any
failed probe, then to Offline once the configurable threshold (30 s
default) is exceeded. The Error state is gone; Reconnecting + the
exposed `error` string subsume its UI role.
ReactiveListModel is the headline QML type:
- QAbstractListModel that GETs `baseUrl + source` for an initial JSON
array and then keeps in sync via an internal MercureClient subscribed
to `topic`.
- Role names are derived dynamically from the first row's keys plus an
internal `pending` boolean role used by optimistic mutations.
- Diff application: upsert (insert-or-update), delete, replace; gap
detection via the envelope `version` field with auto re-fetch.
- `invoke(method, path, body, optimistic)` is the optimistic command
primitive. Generates an Idempotency-Key, applies the local diff,
POST/PATCH/DELETEs with that key, and resolves on the matching
Mercure echo (correlation-key matched in ModelPublisher's envelope).
Rolls back and emits commandFailed on 4xx/5xx, commandTimedOut after
10 s without an echo. Phase 4 packaging will surface configuration
for the timeout.
AppShell.qml is the optional convenience root:
- Reads BackendConnection.connectionState.
- Reconnecting → top banner.
- Offline → modal overlay with the error string and a Retry button
(calls BackendConnection.restart()).
- Wraps user content via `default property alias content`.
Apps that want full chrome control can skip AppShell entirely; the
skeleton's Main.qml keeps its own status display for demonstration
and is unaffected.
ReactiveObject (single-entity twin of ReactiveListModel) is intentionally
deferred — same envelope handling, smaller surface; will land in Phase 2
follow-up or Phase 3 alongside the todo example. Cursor pagination is
similarly deferred (the Phase 2 done criterion uses small lists).
Smoke tested: /healthz + /api/ping round-trip cleanly, zero Mercure 401s,
clean shutdown. composer quality stays green (16 tests, 45 assertions).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Symfony app under framework/skeleton/symfony/: minimal bin/console,
public/index.php, MicroKernel-based src/Kernel.php, services.yaml,
framework/security/mercure config, and a demo App\Controller\PingController
that GETs /api/ping (returning JSON pong) and republishes the same
payload to the Mercure topic app://ping. composer.json uses a path
repository to symlink the bundle from ../../php so local edits are
picked up live.
QML app under framework/skeleton/qml/: top-level CMake that
add_subdirectory's framework/qml, a main.cpp that creates the Qt
process, runs SingleInstance.acquireOrForward before any QML loads,
exposes SingleInstance via context property, and loadFromModule's
Skeleton.Main. Main.qml uses BackendConnection / RestClient /
MercureClient from PhpQml.Bridge and renders status dots, a Ping
button, and an event log.
Caddyfile binds 127.0.0.1:8765, enables in-memory Mercure with a
256-bit dev JWT (matches symfony/.env, lcobucci/jwt requires this).
Makefile wraps build / dev / doctor / clean; scripts/dev.sh starts
FrankenPHP --watch and the Qt host together with explicit PID-based
teardown (process-group `kill 0` proved unreliable when frankenphp's
watch fork reparented).
Bug fixes uncovered in this sub-commit:
- SingleInstance.acquireOrForward: probe-first, then removeServer +
retry-listen. The original loop-with-removeServer-after-failed-bind
silently exited on stale sockets from prior runs.
- Main.qml: MercureClient does NOT inherit BackendConnection.token —
Mercure subscribes anonymously in dev (Caddyfile), and forwarding
the bridge bearer made it 401-loop.
- /api/ping was 500ing because the dev MERCURE_JWT_SECRET was 144 bits;
bumped to 64-char (>=256 bit) to satisfy lcobucci/jwt.
- Linked the framework lib (php_qml_bridge) explicitly in addition to
the QML plugin so SingleInstance.h resolves.
- Auto-generated config/reference.php gitignored.
Smoke verified offscreen: /healthz 200, /api/ping 200, 1 publish, 1
subscriber, zero 401s, clean shutdown with no zombies.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
MercureClient is a single-topic SSE subscriber: opens a long-lived GET
on the hub URL with the topic query and Accept: text/event-stream,
parses the line protocol into update(data, id) signals, and reconnects
with 1s→2s→…→30s exponential backoff on drop. Tracks lastEventId across
reconnects and sends it as Last-Event-ID so the hub can replay missed
messages — backing the "Sleep / wake" path in PLAN.md §3 *Edge cases*.
One client per topic by design; multi-topic aggregation is Phase 2.
RestClient.qml is a Promise-style XMLHttpRequest wrapper. Auto-attaches
an RFC4122-v4 Idempotency-Key to every non-GET request (PLAN.md §4 and
§7) so retries are safe by default. Maps application/problem+json error
bodies into structured rejections for downstream UI.
Standalone CMake build remains green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
BackendConnection (QML singleton via create() factory) reads BRIDGE_URL
and BRIDGE_TOKEN from env, periodically probes <url>/healthz with a 2s
transfer timeout, and exposes a Connecting/Online/Error state machine
plus error/token properties to QML. Bundled-mode startup (spawning the
embedded FrankenPHP child) is a Phase 4 deliverable; restart() is a
no-op for now. tokenRotated signal is reserved for the per-session
secret rotation described in PLAN.md §3.
SingleInstance is C++-only — main() must call acquireOrForward() before
the QML engine boots, so it's exposed via context property rather than
QML_SINGLETON. QLocalServer-based lock with stale-socket detection,
launch-arg forwarding via QDataStream, and the deadlock-avoiding race
fallback specified in §3 *Edge cases*.
CMakeLists.txt declares the PhpQml.Bridge static QML module with both
sources and is dual-mode: stands alone for sanity builds, integrates
via add_subdirectory from the skeleton's top-level CMake (Phase 1
sub-commit 6). Standalone build verified clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Stands up the directory structure Phase 1 fills in over subsequent
sub-commits: framework/php (Composer package php-qml/bridge),
framework/qml (Qt module placeholder), framework/skeleton (Caddyfile +
Makefile stubs), and .gitea/workflows/ci.yml. Root .gitignore covers
the build/composer/Symfony/Qt/CMake/IDE artefacts the rest of Phase 1
will produce. No bundle code, no Qt module sources, no working dev mode
yet — those land in sub-commits 2-7. Spike still in place.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
