Step 5 of the map editor. EditSession becomes the single owner of the constraint
set, replacing the pair of refs step 4 kept alongside it: it now holds the saved
operations too, and `fragment()` assembles the constraints plus every operation
they reference — the shape both preview and save send. That removes the class of
bug that produced the earlier 400, because callers can no longer ship a
constraint whose provenance points at nothing.
Save goes through `expectedDocumentVersion`. A 409 adopts the server's version so
the next attempt is checked against reality, and says which version won instead
of failing silently. Undo of a saved gesture appends an inverse operation rather
than rewriting persisted history; undo of an unsaved one just moves the cursor.
Discard drops unsaved commands, cancels anything in flight, and returns the map
to the baseline.
One gesture mints one operation id, released on pointerup. Reusing an id across
gestures put two operations with the same id in the document, which
validateEditDocument() rejects.
The API test now covers the payload the client actually sends — `constraints` +
`operations` merged into the active document, rather than a whole document — and
asserts that a save survives a reload as `exact`. Sending constraints without
their operations is asserted to be rejected rather than written.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Steps 1-3 of the main map road interval editor.
EditSession keeps the command stack, undo/redo and previewSeq arbitration as
pure logic with no OpenLayers reference, so all of it is unit-tested in node.
Pointer displacement converts to meters through EPSG:4326 and spherical
distance: treating a 3857 delta as meters desyncs the geometry from the cursor
by 1/cos(latitude). Handle drags project onto the axis the manifest declares
and clamp to its range, so the client never writes a coordinate into a road
polygon.
All of it sits behind a directEdit flag that defaults to off. With the flag off
the workbench requests no manifest, creates no extra source and registers no
interaction, so behaviour matches main.
The ol-ext probe passed its three gates but is not adopted for road handles.
Transform translates by the raw pointer delta, so a handle detaches from its
clamped constraint value: a drag reading -24.1 m produced a draft of -5.4 m.
Production needs the handle position derived from the constraint instead, which
means owning the position update, so native OL PointerInteraction will carry
the drag. ol-ext stays out of package.json; the probe is kept as a manual
harness. Reserve handles are unreachable with the current solver, recorded in
research/ rather than worked around.
Also names the dead backend when an API response is empty, instead of
surfacing "Unexpected end of JSON input" from response.json().
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
