Backend (school-service):
- notification_log table with UNIQUE(event_id, lead_days, audience,
channel) for idempotent re-runs. Status enum sent/failed/skipped.
- internal/notifications/templates.go: per-event-type × audience ×
lead-day-bucket × language templates in 8 languages (de/en/tr/ar/
uk/ru/pl/fr). Fallback chain (lang→de, eventType→andere) so we
never miss a render.
- service.go scans cal_school_event for events whose
(start_date - runDate) appears in notification_lead_days. For each
due (audience, channel) tuple it dispatches via POST to the
Matrix/Email upstreams owned by the colleague's services.
Empty URL → status='skipped', logged for visibility.
- dispatcher.go handles the POST, parent-recipient lookup (joins
parent_account + parent_child + cal_school_event.affected_class_ids),
and writeLog with the unique constraint dropping duplicate runs.
- main.go runs a 1-hour ticker; when time.Hour()==6 it invokes the
scanner for today. Idempotent so transient restarts don't double-
send.
- POST /calendar/notifications/run-now for manual trigger + backfill
(?date=YYYY-MM-DD).
- GET /calendar/events/:id/notifications returns notification_log
rows scoped to the owning teacher.
- MATRIX_SERVICE_URL + EMAIL_SERVICE_URL env vars added (default
empty = stub mode).
Frontend (studio-v2):
- NotificationStatus component fetches /events/:id/notifications and
renders coloured badges per (lead, audience, channel, status).
- DayDetail mounts NotificationStatus inside each event card when
notify_parents or notify_students is set.
Tests:
- 6 new Go unit tests for bucketFor + Render (de/tr/fallback paths)
+ substitute(class_suffix). 89 subtests gesamt.
- 2 new Playwright tests: badge render with mocked log, hidden when
notifications are off.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
school-service additions:
- tt_solution + tt_lesson migration. tt_lesson carries three UNIQUEs
(solution+class, solution+teacher, solution+room per slot) so the
DB itself rejects any double-booking the solver might emit by
mistake.
- Solution CRUD + GET solutions/:id/lessons endpoint with joined
class/subject/teacher/room names for display.
- POST /timetable/solutions creates the row then fires off the
solver-service via HTTP (5s timeout, mark failed if unreachable).
- SOLVER_SERVICE_URL config wired through main.go/handlers.
New service timetable-solver-service:
- Python 3.11 + FastAPI + Timefold Solver 1.21 (Apache-2.0). Dockerfile
bundles OpenJDK 17 since Timefold for Python is a JPype bridge.
- app/domain.py — Timefold @planning_entity Lesson with timeslot+room
as PlanningVariables; @planning_solution Timetable holds problem
facts (rooms/teachers/etc.) AND rule-fact collections.
- app/rules.py — frozen dataclasses mirroring 6 of the 15 tt_
constraint_* tables initially.
- app/constraints.py — ConstraintProvider with 3 universal hard
constraints (no double-booking) + 5 DB-driven constraints
(teacher_unavailable_day/window, teacher_excluded_room,
room_unavailable, room_requires_type) + 1 quality soft constraint
(subject_preferred_period). Remaining 9 constraint types ready to
plug in via the same join pattern.
- app/repository.py — async loaders for stammdaten + rules; builds
one Lesson per (curriculum row × weekly_hours), skipping rows
without a tt_assignment teacher.
- app/runner.py — runs solver in ThreadPoolExecutor so the FastAPI
event loop stays responsive. Updates tt_solution status
pending→running→completed|infeasible|failed.
- app/main.py — POST /api/v1/solve (202 Accepted, background task),
GET /api/v1/jobs/{id}, /health. School-service polls tt_solution
directly instead of GET /jobs for the typical case.
- docker-compose.yml adds the service on port 8095, depending on
core-health-check.
Tests:
- school-service: validator test for CreateTimetableSolutionRequest
(allows empty name).
- solver-service: tests/test_domain.py + tests/test_rules.py cover
construction + hashability of the planning facts. Full solve flow
deferred to Phase 8 integration with seed data.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Benjamin Admin