screentinker/server/services
ScreenTinker 977407ce99 feat(#146): usage metering + admin-gated Billable Screens report (contract system-of-record)
Implements the ByteTinker-Bold distribution-agreement billing math and surfaces it on a
standalone admin-only route. No UI (the API figure is the deliverable). Server-side only.

Contract math (lib/billing.js, config-driven; defaults ARE the agreement):
- ASD (per device/day) = min(1.0, online_seconds / (hours*3600))   # 28800 default
- BillableScreens (per month) = round-half-up( Sum ASD / days_in_month )
- Flat tier (not marginal): 1-499 $1.50 / 500-999 $1.25 / 1000+ $1.00; cost = screens*rate.
Single global rate card for now (per-tenant is a future concern; noted in code).

Data foundation:
- New durable rollup device_usage_daily(device_id, day 'YYYY-MM-DD', online_seconds),
  index on day. status_log (3d) / telemetry (24h) can't back a billing month.
- Accumulated INCREMENTALLY off the heartbeat tick from the live connection map (same
  source as devices_connected) - never reconstructed from logs. Each tick credits every
  connected device's today-row (min(86400, +elapsed)), chunked + transactional (non-blocking);
  per-tick credit capped (accrualCapSeconds) as a stall/restart guard.
- Retention ~400d, pruned via chunked-prune (pruneUsageDaily in runMaintenance).

API: GET /api/billing/usage?month=YYYY-MM (default current), requirePlatformAdmin, mounted
SEPARATELY from /api/status (billing is revenue data + a heavier aggregate; must not touch
the hot status path). Reads the rollup only. MTD figure averages over COMPLETED days only
(today shown in `daily` but excluded until it completes); is_final + billable_screens_final
appear once the month completes.

Tests (12): ASD math; billable round-half-up; flat tier/cost boundaries; accumulator
(accrues by interval, caps at 86400/day, disconnected doesn't accrue); report MTD-excludes-
today + final-month is_final; retention prune; endpoint authz (admin 200 / non-admin 403 /
anon 401) + billing absent from /api/status. Suite 301/301. First-full-month caveat +
formula in docs/billing.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-01 20:45:27 -05:00
..
activationNudge.js feat(signup): T+3 activation nudge for users with zero paired screens 2026-05-30 20:28:24 -05:00
activity.js feat(workspaces): rename via switcher dropdown - new PATCH /api/workspaces/:id route, per-row pencil affordance in switcher (visible only when caller can_admin), small rename modal with name + slug fields, validation (name <=80 chars, slug ^[a-z0-9]+(?:-[a-z0-9]+)*$ <=60 chars, blank slug -> NULL), 409 on per-org slug collision. Permission gating via new canAdminWorkspace(db, user, ws) helper in lib/permissions.js - reused-ready for future Phase 3 admin actions. /me query now joins organization_members to compute can_admin per accessible_workspaces entry. Drive-by fixes surfaced: (1) activityLogger method filter was missing PATCH, added; (2) routes that operate on a target workspace by URL param need to stamp req.workspaceId from the param so activityLogger captures the right tenant attribution - documented in the route. Smoke fixture: switcher-test@local.test is workspace_admin of Studio A and workspace_editor of Field Crew (no org_owner) so the can_admin true/false split is exercised in one login. 2026-05-12 11:06:55 -05:00
agency-digest.js feat(api): batched email digest for agency uploads (#73) 2026-06-14 13:59:37 -05:00
alerts.js feat(email): Microsoft Graph send + alert spam protection + preferences UI 2026-05-12 18:16:40 -05:00
email.js feat(signup): welcome email + admin signup notification (slice 1) 2026-05-30 14:50:27 -05:00
heartbeat.js feat(#146): usage metering + admin-gated Billable Screens report (contract system-of-record) 2026-07-01 20:45:27 -05:00
loop-lag.js fix(#146) P3.7: coalescer carries the PEAK numeric over the window 2026-06-30 22:10:45 -05:00
scheduler.js feat(scheduling): per-item schedule blocks (#74 dayparting, #75 auto-expire) 2026-06-11 15:46:41 -05:00
signupEmails.js fix(signup): make admin-notify recipient env-driven, not hardcoded 2026-05-30 16:16:33 -05:00