feat(stats): reading statistics — session capture wired + /stats page + widget + per-book card

The design parked in the handoff (multi-tier stats off reading_history;
bookorbit-style in data, not looks) is in. The real prerequisite work
was data: reading_history existed but NOTHING wrote to it — the whole
stats feature was sitting on an empty table.

- CAPTURE (no client changes, no repo-boundary crossings): every
  successful progress write through SaveProgress (KOReader + app + web
  + Kobo + offline queue — the one chokepoint) now records one
  reading_history session row: span = the interval since the PREVIOUS
  write instant, pages = positive page delta when both sides know the
  page index, marker rows for first contact. Spans over 2h are kept as
  zero-second markers (overnight suspend→resume, offline flushes must
  not inflate totals) — the honest 'sync cadence, not a stopwatch'
  caveat stays. device_id only when a REAL device row matches (the
  web/app progress path historically stuffs the USER id into DeviceID
  — probe instead of trusting it; FK violation would silently drop
  every capture). Source preserved in device_metadata.

- API: /api/stats/summary?range=7|30|90|year (totals, zero-filled
  daily arrays, streaks, most-active day/weekday, top books, library
  breakdown — one call), /api/stats/this-week (widget: rolling 7d vs
  previous + streak), /api/stats/books/:id (lifetime + recent
  sessions). All bucketed in the user's timezone; finished ≡ any push
  ≥0.995; visible-library lens enforced at source. Legacy
  /api/analytics/* kept untouched. Range windows anchor end-of-day to
  the START of today (blasting the clock time into tomorrow resolved
  'today' a calendar day late — found by the streak test).

- /stats page (sidebar Stats between Progress and Devices, previously
  /analytics was an orphan): range selector, five stat cards, two
  Chart.js v4 charts (daily minutes bar, pages/day line — chunked via
  dynamic import so main.js stays untouched), per-library breakdown,
  most-read list, empty-state explainer. /analytics now 301s to /stats.
  The orphaned analytics.templ + analytics.ts removed (their containers
  and the page JSON never matched; the page was astub).

- Dashboard 'This Week' widget (server-rendered, suppressed on service
  failure) and the book detail 'Your Reading Stats' card (lifetime
  totals of the viewer's own sessions) complete the tiers: per-user
  default, per-library breakdown inline, per-book on the page,
  per-system/admin aggregate parked as before.

Tests: statistics_test.go (capture semantics at the chokepoint,
tz/day buckets, zero-fill, streak math, finished detection, range
validation, auth gate, widget, per-book lifetime). Full suite PASS.
This commit is contained in:
John O'Keefe committed 2026-10-14 12:46:38 -04:00
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package templates
templ Stats(user User) {
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>Reading Stats - Bookhoard</title>
<script src="/static/htmx.min.js"></script>
<link href="/static/style.css" rel="stylesheet"/>
<link rel="icon" type="image/svg+xml" href="/static/favicon.svg"/>
</head>
<body x-data="stats" x-init="initStatsPage()" class="theme-{ user.Theme }">
@Header(user, "/stats")
<div class="mx-auto container px-4 sm:px-6 lg:px-8 py-8">
<div class="mb-8">
<div class="flex items-center gap-3 mb-1">
<span class="grid place-items-center h-10 w-10 rounded-xl" style="background-color: var(--accent-muted); color: var(--accent);">
@Icon("chart", "h-5 w-5")
</span>
<h1 class="text-2xl font-bold tracking-tight" style="color: var(--text-primary)">Reading Stats</h1>
</div>
<p class="text-sm" style="color: var(--text-secondary)">Days are bucketed in your timezone ({ user.Timezone }) · totals derive from your devices' sync pushes, not a stopwatch.</p>
</div>
<div class="card p-4 mb-6 flex flex-wrap items-center justify-between gap-3">
<div class="flex gap-2" id="stats-range-selector">
<button data-range="7" @click="selectRange('7')" class="stats-range-btn btn btn-secondary text-sm">Last 7 days</button>
<button data-range="30" @click="selectRange('30')" class="stats-range-btn btn btn-secondary text-sm">30 days</button>
<button data-range="90" @click="selectRange('90')" class="stats-range-btn btn btn-secondary text-sm">90 days</button>
<button data-range="year" @click="selectRange('year')" class="stats-range-btn btn btn-secondary text-sm">This year</button>
</div>
<p class="text-xs" style="color: var(--text-secondary)" id="stats-window-label"></p>
</div>
<div class="grid grid-cols-2 lg:grid-cols-5 gap-4 mb-8">
<div class="stat-card">
<h3 class="text-xs font-semibold uppercase tracking-wide mb-2" style="color: var(--text-secondary)">Reading Time</h3>
<p id="stats-total-minutes" class="text-3xl font-bold" style="color: var(--accent)">–</p>
</div>
<div class="stat-card">
<h3 class="text-xs font-semibold uppercase tracking-wide mb-2" style="color: var(--text-secondary)">Pages</h3>
<p id="stats-total-pages" class="text-3xl font-bold" style="color: var(--accent)">–</p>
</div>
<div class="stat-card">
<h3 class="text-xs font-semibold uppercase tracking-wide mb-2" style="color: var(--text-secondary)">Streaks</h3>
<p id="stats-streaks" class="text-lg font-bold leading-tight mt-1" style="color: var(--text-primary)">–</p>
</div>
<div class="stat-card">
<h3 class="text-xs font-semibold uppercase tracking-wide mb-2" style="color: var(--text-secondary)">Books Finished</h3>
<p id="stats-books-finished" class="text-3xl font-bold" style="color: var(--accent)">–</p>
</div>
<div class="stat-card">
<h3 class="text-xs font-semibold uppercase tracking-wide mb-2" style="color: var(--text-secondary)">Most Active</h3>
<p id="stats-most-active" class="text-sm font-bold leading-snug mt-2" style="color: var(--text-primary)">–</p>
</div>
</div>
<div class="grid grid-cols-1 lg:grid-cols-2 gap-6 mb-8">
<div class="card p-6">
<h3 class="text-sm font-semibold uppercase tracking-wide mb-4" style="color: var(--text-secondary)">Daily Reading Minutes</h3>
<div class="h-64">
<canvas id="stats-daily-minutes-chart"></canvas>
</div>
</div>
<div class="card p-6">
<h3 class="text-sm font-semibold uppercase tracking-wide mb-4" style="color: var(--text-secondary)">Pages per Day</h3>
<div class="h-64">
<canvas id="stats-daily-pages-chart"></canvas>
</div>
</div>
</div>
<div class="grid grid-cols-1 lg:grid-cols-2 gap-6 mb-8">
<div class="card p-6">
<h3 class="text-sm font-semibold uppercase tracking-wide mb-4" style="color: var(--text-secondary)">By Library</h3>
<div id="stats-library-breakdown" class="space-y-3">
<div class="text-center py-6 text-sm" style="color: var(--text-secondary)">Loading…</div>
</div>
</div>
<div class="card p-6">
<h3 class="text-sm font-semibold uppercase tracking-wide mb-4" style="color: var(--text-secondary)">Most Read</h3>
<div id="stats-top-books" class="space-y-3">
<div class="text-center py-6 text-sm" style="color: var(--text-secondary)">Loading…</div>
</div>
</div>
</div>
<div id="stats-empty" class="card p-8 text-center hidden">
<p class="text-sm mb-2" style="color: var(--text-primary)">No reading sessions recorded in this range yet.</p>
<p class="text-xs" style="color: var(--text-secondary)">Sessions are captured every time a device syncs reading progress (KOReader, the app, the web reader).</p>
</div>
</div>
@ErrorToast("")
</body>
</html>
}