tessera-ctl/.planning/phases/07-dkv-fleet-module/07-01-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech_stack, key_files, decisions, metrics

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	decisions	metrics
07-dkv-fleet-module	01	dkv-backend-foundation	dkv pdf-parse prisma nestjs schedule imapflow xlsx	requires provides affects CalendarModule PrismaModule DkvParserService DkvModuleConfig DkvVehicleMaster DkvInvoiceHistory SmtpConfig ScheduleModule CalendarCryptoService (exported) apps/api/package.json apps/api/prisma/schema.prisma apps/api/src/app.module.ts apps/api/src/calendar/calendar.module.ts	added patterns imapflow@1.4.3 pdf-parse@2.4.5 xlsx@0.18.5 pdf-parse v2 class API: new PDFParse({data:buffer}).getText().destroy() DKV PDF dual-format parser: tab-split (single-tx) + columnar transpose (multi-tx) German number parsing: replace(/./ g,'').replace(',','.') ScheduleModule.forRoot() for dynamic cron job support CalendarCryptoService re-exported for DKV credential encryption	created modified apps/api/src/dkv/dkv.types.ts apps/api/src/dkv/dkv-parser.service.ts apps/api/src/dkv/dkv-parser.validate.ts apps/api/package.json apps/api/prisma/schema.prisma apps/api/src/app.module.ts apps/api/src/calendar/calendar.module.ts pnpm-lock.yaml	DKV PDF uses two extraction formats: single-tx (tab-separated row) vs multi-tx (columnar transpose) — both handled KM and Produkt are merged into single tab field in single-tx format (no tab between them in PDF layout) Vehicle block regex: /VEHICLE:\s+([A-Z0-9 ._-]+?)\s+CARD NO.:\s+(\S+)/ reliably matches all 27 vehicles Multi-tx columnar: n = count of consecutive date-lines at block start; groups indexed as 0×n..n-1 per column DB push via docker exec tessera-ctl-api-1 (DB port not exposed to host) prisma generate runs successfully on host (postinstall script)	duration completed tasks files_created files_modified 13min 2026-06-26T17:36:00Z 3 3 5

Phase 07 Plan 01: DKV Backend Foundation — Deps + Schema + PDF Parser Summary

DKV backend foundation established: three npm packages installed (imapflow, pdf-parse, xlsx), four Prisma tables pushed to live PostgreSQL, ScheduleModule registered in AppModule, CalendarCryptoService re-exported, and the highest-risk component (PDF parser) empirically validated against the real April 2026 DKV invoice — 27 vehicle blocks, 66 transactions extracted, DKV-02 parsing risk retired.

Tasks Completed

Task	Name	Commit	Key Files
1	Package legitimacy gate	(human-verify, no commit)	—
2	Install deps, add Prisma models, wire ScheduleModule + crypto	c4b39cc	package.json, schema.prisma, app.module.ts, calendar.module.ts, dkv.types.ts
3	Push schema to live DB	(no code commit — DB op only)	Database: 4 new tables created
4	DKV PDF parser — validate + implement service	6235aaf	dkv-parser.validate.ts, dkv-parser.service.ts

Verification Results

• imapflow + pdf-parse + xlsx loadable: PASS
• grep -c "^model " apps/api/prisma/schema.prisma → 15 (was 11, +4 new): PASS
• ScheduleModule.forRoot() in AppModule: PASS
• CalendarCryptoService in CalendarModule exports: PASS
• prisma db push (2nd run): "The database is already in sync" PASS
• dkv-parser.validate.ts exits 0: 27 vehicle blocks, 66 transactions PASS
• pnpm --filter @tessera/api type-check exits 0: PASS

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Research Pattern 4 regex replaced with dual-format tab parser

• Found during: Task 4
• Issue: Research Pattern 4 used a space-based regex (/(\d{2}\.\d{2}\.\d{4})\s+(.+?)\s{2,}([\d.,]+)\s+km\s+(\S+)\s+([\d.,]+)\s+(\w+)/g) that assumed km suffix after the odometer value and whitespace-based column separation. Actual invoice.pdf uses tab-separated fields; there is no km text; single-tx and multi-tx formats differ structurally.
• Fix: Replaced with a dual-format dispatcher:
  • Single-TX: Tab-split → fields[5] = "KM PRODUKT" (km and product merged in one tab cell), fields[6] = "CODE UNIT", fields[7] = menge
  • Multi-TX (columnar): Count leading date lines → n; extract groups at offsets 0×n, 2×n (orts), 5×n (kms), 6×n (products), 8×n (units), 9×n (quantities), 12×n (brutto), 13×n (netto)
• Files modified: apps/api/src/dkv/dkv-parser.validate.ts, apps/api/src/dkv/dkv-parser.service.ts
• Commits: 6235aaf

2. [Rule 3 - Blocking] Temporary debug-pdf.ts removed before type-check

• Found during: Task 4
• Issue: Debug script used top-level await which TypeScript rejects under the API's CommonJS module target.
• Fix: Deleted before committing (it was a scratch file, never staged).

PDF Parser: Empirical Results vs Research Assumptions

Research Assumption	Actual Format (invoice.pdf)	Resolution
{ data: buffer } LoadParameters	CONFIRMED: pdf-parse v2 accepts { data: Buffer }	Assumption A1 VERIFIED
VEHICLE: / CARD NO.: markers	CONFIRMED: exact strings present, all 27 vehicles matched	Assumption A2 PARTIALLY verified
Space/whitespace column separation	WRONG: tabs separate columns in single-tx format	Regex rewritten
NNN.NNN km suffix pattern	WRONG: no "km" text in extracted PDF; odometer is bare number	Regex rewritten
Single regex for all transactions	WRONG: two distinct formats (single-tx tabs vs multi-tx columnar)	Dual-format dispatcher

Actual vehicle count from invoice.pdf: 27 (matches expected from CONTEXT.md) Actual transaction count: 66 across 27 vehicles (varies 1–7 per vehicle)

DB push method used: docker exec tessera-ctl-api-1 sh -c "cd /app/apps/api && npx prisma db push --skip-generate" — same as Phase 05 pattern. Note: prisma generate ran on host (postinstall), but container generate failed due to permission error on node_modules/.pnpm/prisma*/. Host-side generation is sufficient for downstream type-check.

Known Stubs

None — all functionality in this plan is fully implemented and empirically validated.

Threat Flags

None. All STRIDE threats in the plan's threat register were mitigated:

• T-07-SC: Package legitimacy gate (Task 1 human-verify) cleared by user.
• T-07-01: destroy() called after every PDF extraction.
• T-07-02: Generic error messages only on parse failure — no PDF content in logs.

Self-Check: PASSED

Files verified present:

• apps/api/src/dkv/dkv.types.ts ✓
• apps/api/src/dkv/dkv-parser.service.ts ✓
• apps/api/src/dkv/dkv-parser.validate.ts ✓

Commits verified in git log:

• c4b39cc ✓ (feat(07-01): install DKV deps...)
• 6235aaf ✓ (feat(07-01): DKV PDF parser...)