feat(web): read admin lanes from the durable pass log, not a poller snapshot (#145)
The Lanes page now projects store.LatestLanePasses and the owner-window outcomes (store.LanePassOutcomes) into per-Site rows instead of reading an in-memory Poller snapshot, so a deploy answers the instant the store is up. Browser configuration is a config fact and reachability is derived from recent browser-Site passes inside latest.RefuseBackoff. This atomically deletes the in-memory path in the same commit that makes the page read the DB: latest/status.go (LaneState, Status, LaneStatus, recordLaneState) and the web.LaneReporter seam plus fakeLanes are gone, and latest.refuseBackoff is renamed latest.RefuseBackoff at every callsite. ownerWindow (#142) is referenced, never declared (contract C2)
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@@ -6,18 +6,9 @@ import (
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"strconv"
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"time"
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"bookmarkmanager/backend/internal/latest"
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"bookmarkmanager/backend/internal/store"
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)
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// LaneReporter is the administrative page's whole window onto the running
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// poller: one snapshot of Poll Lane state, copied out of memory on request.
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// The Poller satisfies it in production and a fake with fixed values satisfies
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// it in tests, so the page's tests need neither a poller nor a Site.
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type LaneReporter interface {
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LaneStatus() latest.Status
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}
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// adminView is the shared shell data for an administrative page and the roster
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// fragment returned after a Reader action.
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type adminView struct {
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@@ -29,50 +20,6 @@ type adminView struct {
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Lanes lanesView
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}
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// lanesView is the Lane status block: one row per Site that has run, plus the
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// browser fact, which is shared by the three browser Sites rather than held
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// once per Site.
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type lanesView struct {
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Rows []laneRow
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// PollerOff means no poller is running at all (disabled by config, or its
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// client could not be built). The browser line must not answer "not
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// configured" then: the sidecar is not the reason nothing is polled.
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PollerOff bool
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BrowserConfigured bool
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BrowserReachable bool
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}
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// laneRow is one Lane formatted for reading rather than for arithmetic: the
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// template renders strings and flags, and every judgement about what they mean
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// is made here.
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type laneRow struct {
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Site string
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Due int
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Ran string
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// Checked is how many Series the last pass read. Due without Checked is a
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// Lane that has stopped working; the two figures side by side are what
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// separate that from a Lane with nothing to do.
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Checked int
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// Gap is empty when no pass has reached the pace yet, so the row omits the
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// figure instead of stating a zero.
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Gap string
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Clamped bool
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Refusing bool
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// BrowserLost marks a Lane whose pages can only be read through the
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// sidecar while the sidecar is unreachable — including the case where none
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// is configured, which stops those Series just as completely.
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BrowserLost bool
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// Stalled marks a Lane with Series waiting that its last pass did not read
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// — the difference between a stopped Lane and a quiet one (story 13). A
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// browser Lane holding Chrome asleep under the wake thresholds is neither,
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// so it carries Asleep instead and never Stalled.
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Stalled bool
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Asleep bool
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// Attention is the one flag the template colours on, so an unhealthy Lane
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// is found at a glance rather than read for.
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Attention bool
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}
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// adminRoute pairs a route pattern with its handler so the route list and the
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// gate cannot drift apart.
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type adminRoute struct {
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@@ -126,11 +73,6 @@ func (h *Handler) admin(w http.ResponseWriter, r *http.Request) {
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h.renderAdmin(w, adminView{Page: "overview"})
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}
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// adminLanes renders the page that hosts the live Lane fragment.
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func (h *Handler) adminLanes(w http.ResponseWriter, r *http.Request) {
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h.renderAdmin(w, adminView{Page: "lanes", Lanes: h.lanesView()})
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}
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// adminReaders renders the Reader roster on its own bookmarkable page.
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func (h *Handler) adminReaders(w http.ResponseWriter, r *http.Request) {
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readers, err := h.store.Readers()
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@@ -152,65 +94,6 @@ func (h *Handler) renderAdmin(w http.ResponseWriter, view adminView) {
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h.render(w, http.StatusOK, "admin", view)
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}
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// uiLanes answers the status block's own refresh. Only the block refreshes on a
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// timer; the roster re-renders after an action, as it always has.
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func (h *Handler) uiLanes(w http.ResponseWriter, r *http.Request) {
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h.render(w, http.StatusOK, "lanes", h.lanesView())
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}
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// lanesView copies the poller's snapshot into display form. A nil reporter (no
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// poller running) and a poller no Lane has reported to yet are the same thing
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// to the page: no data, which it must say rather than draw as confident zeroes
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// — an empty page a few seconds after a restart must not read as a stopped one.
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func (h *Handler) lanesView() lanesView {
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if h.lanes == nil {
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return lanesView{PollerOff: true}
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}
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snap := h.lanes.LaneStatus()
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v := lanesView{
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Rows: make([]laneRow, 0, len(snap.Lanes)),
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BrowserConfigured: snap.BrowserConfigured,
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BrowserReachable: snap.BrowserReachable,
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}
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now := time.Now()
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for _, l := range snap.Lanes {
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lost := l.Browser && !snap.BrowserReachable
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// Series waiting and none read is the shape of a Lane that has stopped
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// working, as distinct from one that is quiet for want of work — or one
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// deliberately leaving Chrome asleep until its group gathers.
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stalled := l.Due > 0 && l.Checked == 0 && !l.Asleep
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gap := ""
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if l.Gap > 0 {
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gap = l.Gap.Truncate(time.Second).String()
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}
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v.Rows = append(v.Rows, laneRow{
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Site: l.Site,
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Due: l.Due,
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Ran: since(now, l.LastRun),
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Checked: l.Checked,
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Gap: gap,
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Clamped: l.Clamped,
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Refusing: l.Refusing,
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BrowserLost: lost,
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Stalled: stalled,
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Asleep: l.Asleep,
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Attention: l.Clamped || l.Refusing || lost || stalled,
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})
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}
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return v
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}
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// since formats how long ago a Lane last ran, at second resolution: the block
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// refreshes every thirty seconds, so anything finer is noise the owner would
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// have to ignore.
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func since(now, then time.Time) string {
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d := now.Sub(then).Truncate(time.Second)
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if d < time.Second {
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return "just now"
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}
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return d.String() + " ago"
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}
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// revokeReaderSessions logs one Reader out of every browser they are signed in
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// on. The owner gate is the route's, not this handler's.
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func (h *Handler) revokeReaderSessions(w http.ResponseWriter, r *http.Request) {
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