Cell edits now actually persist. Row-level batch save fires on
row-blur (selection moves to a different row); the request is one
PUT with the full merged row (server-side data + client drafts)
and If-Match: <etag> for optimistic concurrency. Conflict and
validation responses are surfaced inline; drafts are NEVER silently
discarded — when the server says no, the user's typing stays put
until they explicitly reload or replay.
Architecture (per the research synthesis from earlier in this
sequence):
- ETag tracking: context.js readRows captures the per-row ETag
from HttpFileHandle's response header on the initial GET.
Stashed at row.etag alongside row.data and row.yamlUrl. Phase 3
reads it; later phases (undo replay) inherit it.
- Row-blur trigger: editor.js setSelected calls a new
notifySelectionChanged() hook after selection lands. save.js's
onSelectionChanged tracks _previousSelectedRowId; when it
changes AND the previous row had drafts, fires saveRow(prevId).
Fire-and-forget — don't block the user's flow on the network.
- save.saveRow flow:
1. mergeRow(row.data, drafts) → full updated row.
2. js-yaml dump → wire body.
3. PUT row.yamlUrl, body, headers={Content-Type, If-Match}.
4. Branch on response status:
- 200/201 → success: clear drafts + invalid marks, capture
new ETag from response, replace row.data with merged.
- 202 → outbox queued (downstream client offline):
clear drafts (the outbox owns them now), mark row queued.
- 412 → stale: drafts STAY; mark row stale; show
status-bar prompt with [Use mine] / [Reload] buttons.
- 422 → server validation failed; body has
{errors: [{path, message}]}; mark each cell invalid via
a red-corner CSS marker + title-attribute tooltip.
- other → mark errored; drafts stay.
- Conflict resolution UX:
- "Use mine" replays the user's drafts onto fresh server
state. Re-GETs the row to learn the new ETag + new server
data, replaces row.data with the fresh server values, then
re-PUTs the merge of fresh + drafts. This is client-side
field-level last-writer-wins: fields the user did NOT
touch get the server's new values automatically; only
fields the user changed override server state. No JSON
Patch endpoint required — pure client logic on top of the
existing whole-row PUT path.
- "Reload" drops drafts entirely, re-GETs the row, repaints.
- Validation error display: per-cell red-corner triangle
(Excel-style) plus title-attribute tooltip on hover. Marker
keyed off data-col-idx + the column's field; survives until
the next edit on that cell or the next paint() cycle.
- beforeunload safety net: any rows with drafts at unload time
get one fire-and-forget save attempt. Modern browsers limit
what beforeunload can do; a follow-up could add fetch's
keepalive flag for a more reliable last-shot.
UI surfaces:
- Per-row state classes drive a left-border swatch in the first
cell:
--dirty subtle blue (uncommitted changes)
--saving muted grey (PUT in flight)
--queued warm yellow (outbox accepted)
--invalid orange (server 422)
--stale warning amber (server 412 — also tints row bg)
--errored red (other failure — also tints row bg)
These re-apply across re-paints via save.markAllDirtyRows()
called from main.js's paint() hook (innerHTML='' wipes them).
- #table-status doubles as the conflict prompt host. When a row
goes stale, the bar shows
"This row was changed by someone else. [Use mine] [Reload] [×]"
and the row-id it's bound to is stored on data-row-id so a
successful reload of that row dismisses the prompt.
Outbox (downstream client) interaction:
The cache layer's PUT-replay queue intercepts saves transparently.
On local network failure the cache returns 202 with
X-ZDDC-Cache: queued; we treat 202 as "succeeded for now" —
drafts clear (the outbox owns them and will replay), but the
row stays marked --queued so the user knows the write hasn't
reached upstream yet. When the cache replays and gets a
real 200/201/412/etc., the row state will reflect that on next
read (next paint cycle / page refresh).
Tests (4 new Phase 3 specs, total 31 in tests/tables.spec.js):
- row-blur fires PUT with merged drafts + If-Match. Edit a
cell in row 0, Enter (commits + moves to row 1). Verifies
PUT went out with the right URL, the merged YAML body
contains the new value AND the unchanged fields, and the
If-Match header carries the original ETag.
- 412 conflict marks row stale + shows status prompt. Verifies
the row gains the stale class, the status bar appears with
both [Use mine] and [Reload] buttons, AND the draft is
preserved (never silently dropped on conflict).
- 422 validation errors mark cells invalid. Verifies multiple
field errors → multiple red-corner cells.
- Reload button drops drafts and refreshes. Verifies the bar
hides and drafts clear after a successful reload GET.
Setup: a small page.route helper intercepts http://test.local/*
PUTs and GETs, lets each test queue the next response via
window.__nextResponse, and captures requests at
window.__capturedRequests for inspection. Test fixtures use
absolute http URLs in row.yamlUrl so the route catches them.
Bundle size: 127 KB → 134 KB.
Files:
- tables/js/save.js (new) — saveRow, useMine, reload, status
prompt, row-state markers, beforeunload flush.
- tables/js/editor.js — notifySelectionChanged hook.
- tables/js/context.js — etag + yamlUrl on each row.
- tables/js/main.js — paint() re-applies dirty markers via
save.markAllDirtyRows; exposes app.repaint for save callbacks.
- tables/build.sh — save.js in concat list.
- tables/css/table.css — row-state classes + invalid-cell corner
+ status-bar prompt styling.
- zddc/internal/handler/tables.html — regenerated bundle.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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