Initial commit: MV Rent car rental management system
Spring Boot + Thymeleaf app: fleet, drivers, vendors, bookings, billing/ settlements, payments, maintenance, inspections, reviews, telematics, audit log, staff/user management, and separate admin/vendor/driver portals. Includes Docker Compose deployment (app + Postgres). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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athul rd
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# Car Rental Management System — Implementation Plan
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> Status: **DRAFT for review** · Date: 2026-06-26
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> Baseline: Spring Boot 3.3.4 · Java 17 · Thymeleaf · PostgreSQL · Spring Security (admin + customer chains, Google OAuth2)
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> Purpose: turn the current customer-booking + admin-CRUD app into the full multi-party platform described in the feature spec.
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---
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## 1. Scope summary
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The current app covers ~25–30% of the spec (customer-facing booking + basic admin car/booking CRUD).
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This plan adds the four missing pillars — **Driver, Vendor, Billing/Settlement, Reporting** — plus the
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**Organization/config** foundation and enrichment of Fleet, Customer, and Booking.
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Current coverage vs target:
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| Area | Now | Target |
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|---|---|---|
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| Organization / Config | ~20% | Org profile, staff users + permissions, tax/currency/commission config, category masters |
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| Fleet & Car | ~45% | + year, colour, ownership, feature tags, hourly/monthly rates, documents+expiry, maintenance |
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| Driver | 0% | full module |
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| Vendor | 0% | full module + vendor login + settlement |
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| Customer | ~50% | + categories (Individual/Company/Corporate), GST/billing |
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| Trip Booking | ~40% | + with-driver, hours/months, tax & driver charges, invoice |
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| Billing/Settlement | ~5% | invoices, commission, settlements, profit split |
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| Reporting | 0% | filtered reports + Excel/PDF export, dashboards |
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| Customer page | ~55% | richer filters + driver option |
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---
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## 2. Target architecture
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- **Single Spring Boot modular-monolith** (no microservices). Package-by-feature:
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`org`, `fleet`, `driver`, `vendor`, `customer`, `booking`, `billing`, `reporting`, `web`, `security`, `config`.
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- **Three security filter chains** (extends today's pattern):
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1. `/admin/**` → staff (ROLE_ADMIN, ROLE_STAFF) — existing admin chain, expanded
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2. `/vendor/**` → ROLE_VENDOR — **new** vendor portal chain
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3. everything else → customers + Google OAuth (existing customer chain)
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- **Persistence**: PostgreSQL + JPA. Move `ddl-auto=update` → **Flyway migrations** (versioned schema; required once money/settlement tables exist).
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- **Money**: always `BigDecimal`, scale 2, currency from config. Never `double`.
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- **Exports**: Apache POI (Excel), OpenPDF or Flying Saucer (HTML→PDF) for invoices/statements/reports.
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- **Server-side rendering** stays Thymeleaf; add small JS for dynamic price calc on the customer page.
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---
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## 3. Role & permission model
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Replace the 2-value `Role` enum with a richer model:
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```
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Role (enum): ADMIN, STAFF, VENDOR, CUSTOMER
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Permission (enum): MANAGE_FLEET, MANAGE_DRIVERS, MANAGE_VENDORS, MANAGE_BOOKINGS,
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MANAGE_BILLING, VIEW_REPORTS, MANAGE_CONFIG, MANAGE_USERS
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```
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- `ADMIN` = all permissions. `STAFF` = a configurable subset (stored per-user).
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- `VENDOR` = scoped to own data only (own cars, own trips, own settlements).
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- Authorization: method-level `@PreAuthorize("hasAuthority('MANAGE_FLEET')")` on services/controllers.
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---
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## 4. Domain model (entities & key fields)
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New entities in **bold**; modified existing in _italics_.
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### 4.1 Organization / Config
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- **Organization** — name, legalName, logoUrl, address, gstNumber, contactEmail, phone, currencyCode
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- **SystemConfig** (singleton) — currencyCode, defaultTaxPercent, defaultCommissionPercent,
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defaultDriverDailyCharge, invoicePrefix, settlementCycle (WEEKLY/MONTHLY)
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- **Category** (generic master) — `type` (VEHICLE / DRIVER / CUSTOMER), name, description, active
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→ replaces hard-coded enums so categories are admin-configurable
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- _User_ — add `permissions` (set), `vendor` (nullable FK for vendor-portal users)
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### 4.2 Fleet
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- _Car_ — add: `yearOfRegistration`, `colour`, `ownership` (OWNED / VENDOR), `vendor` (nullable FK),
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`hourlyRate`, `dailyRate` (rename pricePerDay), `monthlyRate`, `unitsTotal`,
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`featureTags` (AC, GPS, … as a set/element-collection), `status` (ACTIVE / MAINTENANCE / RETIRED)
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- **CarDocument** — car FK, docType (RC / INSURANCE / PERMIT / POLLUTION), fileUrl, issuedDate, expiryDate
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- **CarPhoto** — car FK, url, sortOrder (gallery instead of single imageUrl)
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### 4.3 Driver
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- **Driver** — name, phone, licenceNumber, licenceExpiry, yearsExperience, category (FK Category),
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employmentType (EMPLOYED / VENDOR), vendor (nullable FK), hourlyCharge, dailyCharge, monthlyCharge,
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status (AVAILABLE / ON_TRIP / OFF), photoUrl
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- **DriverDocument** — driver FK, docType, fileUrl, expiryDate
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- Trip history derived from `Booking` where `driver = X`
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### 4.4 Vendor
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- **Vendor** — name, contactPerson, phone, email, address, gstNumber,
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bankAccount/settlementDetails, commissionPercent (nullable → overrides global), active
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- Vendor login = a `User` with ROLE_VENDOR linked to the Vendor
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- **VendorSettlement** — vendor FK, periodStart, periodEnd, grossRevenue, commissionAmount,
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driverCharges, netPayable, status (DRAFT / FINALISED / PAID), generatedAt
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### 4.5 Customer
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- _User_ (customer) — add: `customerCategory` (INDIVIDUAL / COMPANY / CORPORATE),
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`companyName`, `gstNumber`, `billingAddress`, `contactPersons` (for company/corporate)
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### 4.6 Booking & Billing
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- _Booking_ — add: `driver` (nullable FK), `withDriver` (bool), `rentalUnit` (HOUR / DAY / MONTH),
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`quantity` (units of the period), `vehicleCharge`, `driverCharge`, `taxPercent`, `taxAmount`,
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`commissionPercent`, `commissionAmount`, `revenueOwner` (OWNED / VENDOR), `vendor` (nullable FK)
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- **Invoice** — booking FK, invoiceNumber, issuedAt, lineItems, subtotal, tax, total, pdfUrl
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- **CommissionRule** — scope (GLOBAL / VENDOR / VEHICLE), refId, percent
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(resolution order: vehicle → vendor → global)
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### 4.7 ER overview (relationships)
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```
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Organization 1─* User
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User *─1 Vendor (vendor-portal users) Vendor 1─* Car
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Vendor 1─* Driver Car 1─* CarDocument / CarPhoto
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Category 1─* Car / Driver / User(customer) Driver 1─* DriverDocument
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Customer(User) 1─* Booking Car 1─* Booking
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Driver 1─* Booking (optional) Booking 1─1 Invoice
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Vendor 1─* Booking (revenue attribution) Vendor 1─* VendorSettlement
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```
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---
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## 5. Calculation rules (single source of truth)
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```
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periodCount = ceil(duration in chosen unit) // HOUR / DAY / MONTH
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vehicleCharge = rate(unit) × periodCount × units
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driverCharge = withDriver ? driverRate(unit) × periodCount : 0
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subtotal = vehicleCharge + driverCharge
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taxAmount = subtotal × taxPercent/100
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total = subtotal + taxAmount
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// Vendor settlement (per vendor trip)
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commissionPercent = resolve(vehicle → vendor → global)
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commissionAmount = vehicleCharge × commissionPercent/100
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netVendorPayable = vehicleCharge − commissionAmount + (vendorDriverCharge − orgDriverMargin)
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// Owned vs vendor profit split tracked via Booking.revenueOwner
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```
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All money `BigDecimal`, `RoundingMode.HALF_UP`, scale 2, currency from `SystemConfig`.
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---
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## 6. Screen inventory
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**Admin / Staff (`/admin`)**
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- Dashboard (KPIs + owned-vs-vendor split), Fleet (list/form + docs/photos/maintenance),
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Drivers (list/form/profile + trip history), Vendors (list/form + settlements),
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Customers (list/detail), Bookings (list/detail/assign-driver/invoice),
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Billing & Settlements, Reports (filter + export), Settings (org, config, categories, staff & permissions)
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**Vendor portal (`/vendor`)** — new
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- Login, Dashboard (own trips/revenue), My Cars, My Drivers, Trips (period filter),
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Settlements (view + export PDF/Excel)
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**Customer page (public)**
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- Home, Car listing **with filters** (category, date, seating, transmission, price, driver option) + live price,
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Car detail, Booking (with/without driver + category), Register/Login, My Bookings + invoices
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---
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## 7. Phased delivery plan
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Each phase is independently shippable and ends with a working app + tests.
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### Phase 0 — Foundations (enablers)
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- Add Flyway; convert current schema to `V1__baseline.sql`; turn off `ddl-auto`
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- Expand `Role` + add `Permission`; method security
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- `Organization` + `SystemConfig` + `Category` master; Settings screens
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- Replace hard-coded category enums with `Category` lookups (keep enums as seed data)
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### Phase 1 — Fleet enrichment
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- Car: year, colour, ownership, feature tags, hourly/daily/monthly rates, units, status(maintenance)
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- CarDocument + CarPhoto with expiry tracking + expiry warnings on dashboard
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- Maintenance blocking in availability logic
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### Phase 2 — Driver module
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- Driver entity + documents + categories + charges + availability
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- Driver list/form/profile + trip history; driver-availability check
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### Phase 3 — Vendor module
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- Vendor onboarding + ROLE_VENDOR login + vendor filter chain (`/vendor/**`)
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- Vendor dashboard (own cars/drivers/trips); commission config (global/vendor/vehicle)
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### Phase 4 — Booking upgrades
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- With/without driver + driver category assignment
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- Hourly/daily/monthly periods; tax + driver-charge calc; revenue attribution
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- Driver double-booking prevention; invoice generation (PDF)
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### Phase 5 — Billing & settlement
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- Invoices/receipts for customers
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- Vendor settlement aggregation per cycle + statement (Excel + PDF) + profit split
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### Phase 6 — Reporting
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- Filtered reports (date, vehicle, category, driver, vendor, customer category, ownership, status)
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- Excel + PDF export; summary dashboard (owned vs vendor); vendor-wise & driver-wise reports
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### Phase 7 — Customer page polish
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- Full filter set + live cost-by-duration; with-driver booking flow; responsive QA
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---
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## 8. Dependencies to add
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- `flyway-core` + `flyway-database-postgresql`
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- `org.apache.poi:poi-ooxml` (Excel)
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- `com.github.librepdf:openpdf` **or** `org.xhtmlrenderer:flying-saucer-pdf` (PDF from Thymeleaf)
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- (already present: web, security, oauth2-client, data-jpa, validation, thymeleaf, postgresql, lombok)
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---
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## 9. Cross-cutting concerns
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- **Migrations**: every schema change via Flyway; never edit a shipped migration.
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- **Validation**: bean validation + show `th:errors` on all admin/vendor forms (current admin forms lack this).
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- **Auditing**: `createdAt/updatedAt/createdBy` via JPA auditing on money-bearing entities.
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- **Performance**: fix N+1 in booking/report queries with fetch-joins; add pagination to all admin tables.
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- **Files**: documents/photos need storage — decide local disk vs S3-compatible (config-driven path).
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- **Testing**: service-layer unit tests for all calc rules; `@WebMvcTest` for access control per chain.
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- **Seed data**: keep `DataInitializer` for org/config/admin + demo vendor/driver/cars.
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---
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## 10. Decisions (LOCKED — 2026-06-26, recommended defaults accepted)
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1. **File storage** → **local filesystem** (config-driven path) for v1.
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2. **PDF library** → **Flying Saucer** (Thymeleaf HTML/CSS → PDF).
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3. **Tenancy** → **single organization** per install.
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4. **Staff permissions** → **per-user permission checkboxes** (granular `Permission` set).
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5. **Settlement cycle** → **monthly** default.
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6. **Bookings** → **day/month** for v1 (hourly *rate fields* stored, hourly *booking flow* deferred).
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### Deviation from §7
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- **Flyway is deferred** to a later hardening phase. During active development the app keeps
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`spring.jpa.hibernate.ddl-auto=update`, which additively creates the new tables/columns without
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disrupting the running PostgreSQL database. Flyway baseline will be introduced before production.
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> Plan locked. Implementation started with Phase 0 — Foundations.
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