Four defects stacked into one nonsense report: cartridges at 20% claiming four
days, cartridges at 1% claiming weeks.
The root cause is a Zabbix API detail. `limit` caps the whole result set rather
than each item, and the query sorted ascending, so the cap kept the OLDEST rows
in the window. A four-cartridge printer polled every five minutes writes over
100k readings in 90 days; the forecast was fitted to the first few days of that
and nothing since. Every rate was real and every rate described a cartridge
thrown away three months ago. Nothing in the output looks wrong, which is why
it needed pinning in a test rather than a comment.
A 90-day burn rate does not need every individual poll, so a long window now
reads hourly trends - the table meant for this, a tenth of the rows, and kept
longer. Raw history serves short windows and any item a site keeps no trends
for. Both are fetched newest-first with the budget scaled per item.
Second, the countdown was computed from the last stored reading while the level
displayed was the live one, so the two could disagree by a whole cartridge. The
live level is now what the countdown divides. A live level far above the stored
run means it was swapped since the last reading, and that is reported as a
replacement rather than as a collapse in the burn rate.
Third, at or below 5% a cartridge reads as empty rather than as a slow drain.
At 1% losing a tenth of a point a day the arithmetic says ten days. The printer
is out of toner, and it is the first thing to order.
Fourth, the days-left column spanned the printer's rows, so the printer's
soonest figure was printed beside every supply it had. That alone accounts for
the shape of both complaints: a healthy cartridge wearing its neighbour's
deadline, and an empty one wearing a number that belonged to nothing on its row.
Also fixes float-typed supplies vanishing from any printer that also had an
integer-typed one - they live in different history tables and the fetch stopped
at whichever answered first.
Not verified against live data: Zabbix is not reachable from the dev box.
The toner report says what is empty now. It could not say what to order, and
nothing recorded how fast anything drains - every level read was cached for
five minutes and then discarded.
Zabbix has been keeping the history all along; we simply never asked. One
history.get gives both answers, because a cartridge only goes DOWN while it is
in use: a rise is a replacement. Count the rises and you have how many
cartridges a printer has been through; fit a slope to the readings SINCE the
last rise and you have days-to-empty. Fitting across a replacement averages a
spent cartridge with a fresh one and describes neither.
Sorted by days left, which is the point. A cartridge at 60% dropping 5% a day
needs ordering before one sitting at 8% that has not moved in months, and a
level-sorted list ranks those backwards.
It refuses to guess. Too few readings, a level that has not moved enough - many
printers report in 10% steps and sit on a plateau for a fortnight - or a recent
replacement each produce no estimate and say which. Those printers are listed
separately rather than sorted in as 0 or as 999, since a printer without an
estimate is neither urgent nor safe. Estimates show what they rest on, because
"9 days from 21 days of readings" and "9 days from 2 readings" are not the same
claim.
A separate report card, not an extension of the toner report: that one is an
exceptions list a tech acts on today, this is an ordering view read monthly,
and the history query is heavier than the live read it would have slowed down.
The analysis is pure arithmetic over a list of readings, so the 14 tests cover
the noise wobble, the plateau, the swap, junk rows and division by zero without
needing Zabbix. Zabbix being unreachable is reported as such rather than
rendering an empty table that reads as "nothing is due".
Plugins were reaching into internal core paths (shopdb.core.models.*,
shopdb.extensions, shopdb.utils.*), coupling them to core's file layout and
violating the ADR-001 contract. Consolidate onto one versioned surface.
- shopdb.api: expand from 2 helpers to the full plugin import surface -
db, cache; BaseModel, AuditMixin; core models (Asset, AssetType,
AssetStatus, Vendor, Model, Communication, CommunicationType, Location,
Setting, AuditLog, Application, AppVersion, OperatingSystem); response +
pagination helpers; employee_connection. Documented in PLUGIN-HOOKS.md.
- Migrate all 22 plugin source files to import only from shopdb.api (plus
shopdb.plugins.base for the ABC).
- Drop the printers plugin's legacy MachineType dependency: remove
_ensure_legacy_machine_types and the seed_supplies machinetypeid lookup
(Model.machinetypeid is nullable; printers carry type via PrinterType).
- Guard test test_plugins_only_import_contract_surface scans plugin source
and fails on any core import outside shopdb.api / shopdb.plugins.base.
- Scaffold templates updated so generated plugins are contract-pure.
- Bump __contract_version__ 0.2.0 -> 0.3.0 (additive surface expansion;
manifests pin <1.0.0 so they still satisfy).
145 tests pass, naming/style green, app factory boots all 6 plugins.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Rewrite the printer Zabbix integration (Bearer auth, host-by-IP, tag-based
supply lookup, ping) and replace the hardcoded toner table with a
modelsupplies table + CRUD + seed. Add mock Zabbix server, live test
harness, and the Playwright screenshot tooling.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
System Settings:
- Add SystemSettings.vue with Zabbix integration, SMTP/email config, SAML SSO settings
- Add Setting model with key-value storage and typed values
- Add settings API with caching
Audit Logging:
- Add AuditLog model tracking user, IP, action, entity changes
- Add comprehensive audit logging to all CRUD operations:
- Machines, Computers, Equipment, Network devices, VLANs, Subnets
- Printers, USB devices (including checkout/checkin)
- Applications, Settings, Users/Roles
- Track old/new values for all field changes
- Mask sensitive values (passwords, tokens) in logs
User Management:
- Add UsersList.vue with full user CRUD
- Add Role management with granular permissions
- Add 41 predefined permissions across 10 categories
- Add users API with roles and permissions endpoints
Reports:
- Add TonerReport.vue for printer supply monitoring
Dark Mode Fixes:
- Fix map position section in PCForm, PrinterForm
- Fix alert-warning in KnowledgeBaseDetail
- All components now use CSS variables for theming
CLI Commands:
- Add flask seed permissions
- Add flask seed settings
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Flask backend with Vue 3 frontend for shop floor machine management.
Includes database schema export for MySQL shopdb_flask database.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
