Symptom (m-reported): /calendar filters don't work.
Root cause: ParseTreeFilter and calendar's ?kind parser both used
`r.URL.Query().Get(key)` to read tag/mgmt/has/status/kind. `Get()`
returns ONLY the first value when a URL has the same key repeated, and
the HTMX filter-strip forms (calendar_section.tmpl, timeline_section,
dashboard_section, graph, bulk) all use `<select multiple name="tag">`
which the browser serialises as `?tag=foo&tag=bar` — repeated params,
not the comma-joined `?tag=foo,bar` the tree page emits from its hidden
input. Every second-and-beyond chip silently dropped on every filter
submission across every page with a multi-select strip; m happened to
catch it on /calendar.
Fix (single helper, four call-site swaps):
- web/server.go parseValues(q, key): collects q[key] (the full slice of
values), joins on comma, runs parseCSV. Accepts both URL shapes:
?tag=foo,bar → ["foo", "bar"]
?tag=foo&tag=bar → ["foo", "bar"]
?tag=foo,bar&tag=baz → ["foo", "bar", "baz"]
- web/tree_filter.go ParseTreeFilter: tag / mgmt / status / has all
switch from `parseCSV(q.Get(...))` to `parseValues(q, ...)`. q / show-
archived / public stay on `q.Get` — they're single-value by design.
- web/calendar.go parseCalendarQuery: ?kind handling drops the bespoke
q.Get + strings.Split + dedup-map and uses `parseValues(..., "kind")`
for the same reason. Behaviour preserved for legacy comma-joined
`?kind=event,doc` AND new repeated-param submission.
Regression test:
- TestCalendarFilterMultiValueTagsFromForm seeds three items — one with
both test tags (A+B), one with only A, one with only B — drops a
dated link on each, then probes `/calendar?tag=A&tag=B`. Before the
fix the A-only note leaked through (the parser kept just tag=A);
after, only the A+B item appears per the AND-across-tags contract.
Full web suite green. Pre-existing db/TestBackfillTagsFromArea failure
unchanged (independent of this change).
Same fix transparently repairs /timeline, /dashboard, /graph, /bulk —
they all consume ParseTreeFilter and shared the bug.
mAi
6f0a318979