Use case: old owner sells the device to a friend. Friend holds the BOOT
button to wipe NVS, joins the device's AP, sets new WiFi. The old
owner's account is still bound to the MAC server-side, so without
explicit consent the friend would silently take over (or, worse, the
old owner's photos would keep displaying until claim).
Flow now:
- GET /setup/{mac} detects MAC bound to anyone and renders a
"Claim this frame as my own" checkbox + a banner explaining what
the takeover wipes. Both register and login panels carry the
checkbox; submitting either form without it bounces back through
the index with a session-flashed error.
- DeviceService::linkToUser now requires allowClaim=true to
transfer ownership. Without it, throws DeviceClaimRequiredException
that the controller catches and turns into the bounce-with-error.
- On a successful claim, the takeover wipes:
* old image-device approvals
* device_image_history rows for the device
* name, wakeTimes, currentImage*, lockedImage, nextPollExpectedAt
so the new owner starts from a fresh slate, not inheriting the
seller's "Living Room / 4:30 AM" preset.
- Already-logged-in user visiting /setup/{mac} for someone else's
device falls through to the form (instead of silently transferring
on page load) so the checkbox is the only path.
Test matrix:
- SetupControllerTest: 5 new functional cases — checkbox renders for
bound MACs, register/login without checkbox bounce + retain old
ownership, register WITH checkbox transfers + purges, logged-in
other-user falls through to form.
- DeviceServiceTest: 3 new unit cases — throw without consent,
isClaimedByAnotherUser true/false matrix, takeover resets device
state.
Coverage: 99.70% lines / 98.19% methods backend, 333 frontend tests
green via ddev tests.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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