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Stage 7a of ~/next/improve-downloads.md: pausing within a session, on the
targets that can actually do it. Resuming across a reload is 7b.
A paused transfer holds **nothing**. Its slot goes back to the node the moment
it stops and resuming rejoins the queue at the tail, because anything else lets
one member close a node by pausing four downloads and going to lunch. So the
lease is taken inside the run loop rather than before it, and pause is refused
outright for a transfer that could not ask for another one.
Resuming is exact rather than approximate: the pipeline stops between two
chunks and never inside one, so what is on disk is always a whole number of
chunks and `fromChunk` is a verified position. The failure mode being avoided
is a file that looks complete and is quietly corrupt.
The target has to survive it, so a pause no longer reaches the `abort()` that a
failure does -- that would delete Electron's `.part` or the file just created in
the granted folder, leaving nothing to continue. And the in-memory fallback
keeps its accumulated chunks rather than starting a second array.
The button is drawn only where the target says it can. A service-worker stream
says no, in its own code and for its own reasons: the browser is already writing
an HTTP response into its own download folder, not feeding it stalls that
download where we cannot see or resume it, and an idle worker is terminated
within seconds. Firefox and Safari therefore keep cancel and get no pause, which
is the decision recorded in §6.5.
Cancelling a paused transfer ends it. A paused run is parked on a promise;
without waking it the row said "cancelled" over work that had not stopped and a
target that was still open.
Six cases, each checked against the unfixed source. Hub suite 842 passed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGdheDLxGReuKHga3BtST
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Selecting four files on Chrome produced a Save As dialog for the first, then
one for the second only after that file had finished, while the last two timed
out; on a later attempt the three remaining transfers appeared frozen.
Two things were going on. Opening the target inside `prepare` had removed the
accidental serialisation that `for (…) await downloadFile(e)` used to provide,
so `_openTargetInTurn` now queues the openings — but a queue whose head is an
unanswered dialog is a head-of-line block, which is what the "freeze" was.
The code already recovered from a picker with no gesture behind it by streaming
instead, on the `SecurityError` Chrome throws. That branch was never reached:
Chrome does not throw, it shows the dialog anyway and waits for a human. So
anything that has to wait its turn is now marked `batched`, and a batched
opening prefers the streamed path whatever the download mode says. The first
file of a batch — the one actually holding the gesture — still gets its dialog,
so the preference is honoured where it can be. For the rest there is no gesture
left to spend and nothing is lost by streaming: the file still lands on disk,
in the browser's own download folder. Only the choice of folder goes, and it
was not on offer. If the worker does not answer, a batched download falls back
to the dialog rather than failing.
Also logs which path led to a dialog. A dialog is the one outcome nobody can
diagnose after the fact — it looks the same whether it was asked for or fallen
back to — and the report this fixes needed three test cycles to narrow. The two
harnesses that lift `_openDownloadTarget` as text now route console.info to
stderr, since they parse stdout as JSON.
Measured against the deployed hub in Chrome 152: the streamed path serves the
hidden iframe in 2-3 ms on a normal load, after a hard reload (via the
`mbdl-claim` recovery already in `_claimController`), and twice in the same
document. Hub suite 824 passed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGdheDLxGReuKHga3BtST
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Clicking Download produced nothing — no row, no icon, no panel — for as long as
it took to open somewhere to write, and then several rows at once. The streamed
path waits for the worker twice; a Save As dialog waits for a person. The row
was created after that, so the slowest part of a download happened with nothing
on screen to say it had begun.
The store gains a `prepare` step, distinct from `run`, and the order is now:
row, then target, then slot.
That last part is why the obvious fix was wrong. Taking the slot first would let
the row appear immediately, and it was tried this morning: a granted slot has to
be taken up within the node's deadline, opening a target can outlast it, and
three downloads became one. (The diagnosis at the time blamed that ordering for
revocations which were in fact a missing `touch()` call — the revert was right
for the wrong reason.) `makeLease` is called after `prepare` succeeds, never
before.
Three behaviours fall out, each with a test:
- a dismissed dialog leaves nothing behind. `prepare` returning false drops
the row: nothing started, so nothing should remain on screen to explain it;
- the row takes the name the file was actually saved under, once known;
- a refusal above the memory ceiling fails the row that is already there,
rather than creating one to kill it.
`preparing` counts as live everywhere — badge, cancel, clearFinished, and
`_busy`, since closing a transport under a preparing transfer strands it exactly
as under a queued one. Six places asked "is this finished?" and were drifting
apart; there is one definition now.
Two mistakes in the tests, worth the note: one counted positions in an output
array by hand and was one out, which reads exactly like a failing assertion
about the code — the values are tagged now, not indexed. And
test_zip_size_limit.py's stub did not run `prepare`, so it no longer reached the
size check the file is about; it now behaves like the real store.
819 hub, 1169 node, 0 failed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGdheDLxGReuKHga3BtST
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Steps 5 and 6 of ~/next/improve-downloads.md. The node has handed out slots
since step 2 and nothing asked for one; now the client does, and the panel shows
what is happening.
`transport.openTransfer()` returns a Lease: `acquire()` resolves when the node
grants, `release()` gives it back exactly once, and nothing else in the client
speaks to the node about slots. Whether a node hands out slots is read from the
handshake ack rather than guessed from a timeout — "no answer yet" and "this
node will never answer" are indistinguishable in time, and guessing wrong either
stalls every download or defeats the cap.
Two things exist only because a queue can lie: a watchdog re-asks when a pushed
grant does not arrive (the node is idempotent on `tr`, so asking again is free),
and a grant for a transfer the page has forgotten is handed straight back rather
than held until the node's deadline.
The slot is asked for **after** there is somewhere to write, and that ordering
is load-bearing: opening a target takes thirty seconds of streamed-download
timeouts, or as long as somebody leaves a Save As dialog open, and a grant not
taken up in time is revoked. Moving it earlier looked better and broke three
downloads into one. Pinned by a test.
The panel groups by state — running, waiting, finished — rather than re-sorting a
flat list, so a row moves only when its own state does. The ETA is withheld until
the speed window holds real measurement: a figure from the first two chunks
swings between four seconds and an hour, and people plan around the first number
they see. One live region announces state changes and not progress.
Three silent paths closed on the way: a download refused for want of a user
gesture (a browser grants one file picker per gesture, and downloading three
files is one gesture) now falls back to the streamed path, which needs none; a
click with no connection says so instead of doing nothing at all; and a queued
transfer counts as busy, so a transport is never closed under one that is
waiting for a grant that could then never arrive.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGdheDLxGReuKHga3BtST
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`test_a_folder_name_carries_no_trailing_slash` sliced from the first
`dir-row` in files-app.js. Since the parent-directory row was added, that
is the ".." row, whose only cell is an ellipsis — so the slice contained
no `${d}` and the test failed on a name it had never looked at. The
directory row itself has always rendered `${d}` with no trailing slash.
Anchored on `key=${full}` instead, with an assertion that the anchor
still lands on a `dir-row` so the next move fails loudly rather than
silently reading the wrong markup again.
Pre-existing: it fails the same way on main.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011pvMdvLBG92jyhvD5pD6us
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GroupPage's 6620-line app.js carried Chat and Files wedged in directly, with
no way to add another group-level app without touching the shell itself. It
is now app.js (routing, non-group pages) plus nine focused files — apps.js
(the registry), chat-app.js, files-app.js, video-player.js, group-page.js
(the shell), group-settings.js, hub-client.js, icon.js and file-utils.js —
with docs/apps.md as the checklist for adding one (Videos/Music/Photos are
sketched there, not built).
Node side gained the matching enablement mechanism, mirroring
member_upload exactly: a roster setting, a signed apps_enabled op enforced
by _has_admin_authority, exposed in the handshake ack. Operators toggle
applications per group from Settings, which also gained a small reorder:
Invite, Pairing, Applications, Shared directories, Uploads, danger zone,
Your devices, Members.
Two bugs surfaced during the split, both missing an import across the new
file boundary and invisible to node --check or a module-load probe since
they only throw when the code path actually runs:
- group-page.js called onRefreshAuth on a stale-token handshake rejection,
but app.js never imported refreshAccessToken from hub-client.js — so a
brand new member (including a group's own creator) hit "Not a member of
this group" and the retry silently failed, throwing before it could
refresh the token.
- chat-app.js called getLocale() for message timestamps without importing
it from i18n.js. Opening Chat on a group with real messages threw mid-
render; uncaught, that appears to wedge Preact's render scheduler, so
every button on the page stopped responding until reload.
Caught the second class of bug with a proper no-undef audit across all
split files (a temporarily installed ESLint 9, since the system one is too
old to parse this codebase's syntax) rather than trusting grep. 827 tests
pass; 6 new ones cover the apps_enabled policy.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016SF6RKNBKg9qejmoMJ9ybA
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the widget
**"Zone sensible" said nothing.** The heading is now the name of the action in
it — "Quitter le groupe", or "Supprimer le groupe" for the owner, who sees a
different button. Worth stating because it is not quite what was asked for: a
fixed "Quitter le groupe" would have sat above a delete button for whoever owns
the group. The red goes with it; only the button is red, which is where the
warning belongs. `members.danger_title` is gone from all ten locales rather than
left behind unread.
**A folder name no longer ends in a slash.** The folder icon in the cell beside
it already says what it is.
**The transfers widget turns green while transfers run.** The badge counts them,
but a count has to be read; colour is what carries from across the room, which
is the point of a widget in the nav bar rather than on the page. Derived from
the live list on every render, so there is no state that can forget to clear
when the last transfer ends.
The class is set in `app.js` and coloured in `style.css` — either alone does
nothing and neither fails loudly, so there is a test for each half.
848 tests pass.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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per-row menus
Downloads and uploads were state inside GroupPage. Leaving a group
unmounted the component, its cleanup closed the DataChannel, and a
half-written file was all you had — which is also why only one thing
could be in flight at a time.
They live in a module-level store now. A group page hands its transport
over on the way out rather than closing it, and the last transfer using
it closes it; signing out is the one thing that cancels everything,
because those transfers are moving data on a token about to stop being
ours. The store is plain JavaScript with no browser globals, so
test_transfers.py runs it under Node and pins the parts that are timing
and lifetime rather than markup: that a cancel stops the work instead of
greying out a row, that a stalled transfer reads as stalled rather than
reporting its own historical average, and that a released transport is
closed by the last transfer and not before.
The widget by the bell shows each transfer with its rate and a cancel
button, so the Files panel no longer carries progress bars — you can
watch a 40 GB archive from the chat, or from another group.
Selection replaces the per-row menu: a Select toggle puts checkboxes on
files and folders, and ⋮ Actions acts on what is ticked. Ticks survive
walking into another folder, so a selection can span directories.
Downloads start together and run together. Videos offer Play only — View
did the same thing, which is the sort of duplication that makes people
wonder what the difference is.
Uploads had to become parallel-safe for any of this to mean anything:
their acks were matched by arrival order, so two at once credited each
other's progress. The node names the file in every ack, so they are keyed
by name now — with the same file twice refused, since the node keys its
own upload state that way too.
Two mistakes worth recording. The selection column went into the body
rows and not the header, because that edit matched nothing and I had not
made it assert; the columns were misaligned until a screenshot showed it.
And the Actions menu opened leftwards from a button at the right edge of
the toolbar, half of it off-screen.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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