feat: create ownership_costs backend feature capsule (refs #29)
Milestone 1: Complete backend feature with: - Migration with CHECK (amount > 0) constraint - Repository with mapRow() for snake_case -> camelCase - Service with CRUD and vehicle authorization - Controller with HTTP handlers - Routes registered at /api/ownership-costs - Validation with Zod schemas - README with endpoint documentation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Eric Gullickson
@@ -1,199 +1,141 @@
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/**
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* @ai-summary Business logic for ownership costs feature
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* @ai-context Handles ownership cost operations and TCO aggregation
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*/
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import { Pool } from 'pg';
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import { OwnershipCostsRepository } from '../data/ownership-costs.repository';
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import {
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OwnershipCost,
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import { randomUUID } from 'crypto';
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import type { Pool } from 'pg';
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import type {
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CreateOwnershipCostRequest,
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UpdateOwnershipCostRequest,
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OwnershipCost,
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OwnershipCostResponse,
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OwnershipCostStats,
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PAYMENTS_PER_YEAR,
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OwnershipCostType
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OwnershipCostType,
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OwnershipCostStats
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} from './ownership-costs.types';
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import { logger } from '../../../core/logging/logger';
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import { VehiclesRepository } from '../../vehicles/data/vehicles.repository';
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import { OwnershipCostsRepository } from '../data/ownership-costs.repository';
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import pool from '../../../core/config/database';
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export class OwnershipCostsService {
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private repository: OwnershipCostsRepository;
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private vehiclesRepository: VehiclesRepository;
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private readonly repo: OwnershipCostsRepository;
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private readonly db: Pool;
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constructor(pool: Pool) {
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this.repository = new OwnershipCostsRepository(pool);
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this.vehiclesRepository = new VehiclesRepository(pool);
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constructor(dbPool?: Pool) {
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this.db = dbPool || pool;
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this.repo = new OwnershipCostsRepository(this.db);
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}
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async create(data: CreateOwnershipCostRequest, userId: string): Promise<OwnershipCostResponse> {
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logger.info('Creating ownership cost', { userId, vehicleId: data.vehicleId, costType: data.costType });
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async createCost(userId: string, body: CreateOwnershipCostRequest): Promise<OwnershipCost> {
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await this.assertVehicleOwnership(userId, body.vehicleId);
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// Verify vehicle ownership
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const vehicle = await this.vehiclesRepository.findById(data.vehicleId);
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if (!vehicle) {
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throw new Error('Vehicle not found');
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}
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if (vehicle.userId !== userId) {
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throw new Error('Unauthorized');
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}
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const id = randomUUID();
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const cost = await this.repo.insert({
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id,
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userId,
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vehicleId: body.vehicleId,
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documentId: body.documentId,
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costType: body.costType,
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amount: body.amount,
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description: body.description,
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periodStart: body.periodStart,
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periodEnd: body.periodEnd,
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notes: body.notes,
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});
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const cost = await this.repository.create({ ...data, userId });
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return cost;
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}
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async getCost(userId: string, id: string): Promise<OwnershipCostResponse | null> {
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const cost = await this.repo.findById(id, userId);
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if (!cost) return null;
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return this.toResponse(cost);
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}
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async getByVehicleId(vehicleId: string, userId: string): Promise<OwnershipCostResponse[]> {
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// Verify vehicle ownership
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const vehicle = await this.vehiclesRepository.findById(vehicleId);
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if (!vehicle) {
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throw new Error('Vehicle not found');
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}
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if (vehicle.userId !== userId) {
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throw new Error('Unauthorized');
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}
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const costs = await this.repository.findByVehicleId(vehicleId, userId);
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return costs.map(cost => this.toResponse(cost));
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async getCosts(userId: string, filters?: { vehicleId?: string; costType?: OwnershipCostType; documentId?: string }): Promise<OwnershipCostResponse[]> {
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const costs = await this.repo.findByUserId(userId, filters);
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return costs.map(c => this.toResponse(c));
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}
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async getById(id: string, userId: string): Promise<OwnershipCostResponse> {
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const cost = await this.repository.findById(id);
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if (!cost) {
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throw new Error('Ownership cost not found');
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}
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if (cost.userId !== userId) {
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throw new Error('Unauthorized');
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}
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return this.toResponse(cost);
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async getCostsByVehicle(userId: string, vehicleId: string): Promise<OwnershipCostResponse[]> {
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const costs = await this.repo.findByVehicleId(vehicleId, userId);
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return costs.map(c => this.toResponse(c));
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}
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async update(id: string, data: UpdateOwnershipCostRequest, userId: string): Promise<OwnershipCostResponse> {
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// Verify ownership
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const existing = await this.repository.findById(id);
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if (!existing) {
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throw new Error('Ownership cost not found');
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}
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if (existing.userId !== userId) {
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throw new Error('Unauthorized');
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}
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async getVehicleOwnershipCosts(vehicleId: string, userId: string): Promise<OwnershipCostStats> {
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const costs = await this.repo.findByVehicleId(vehicleId, userId);
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const updated = await this.repository.update(id, data);
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if (!updated) {
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throw new Error('Update failed');
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}
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let totalCost = 0;
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let insuranceCosts = 0;
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let registrationCosts = 0;
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let taxCosts = 0;
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let otherCosts = 0;
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return this.toResponse(updated);
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}
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for (const c of costs) {
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if (c.amount === null || c.amount === undefined) continue;
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const amount = Number(c.amount);
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if (isNaN(amount)) {
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throw new Error(`Invalid amount value for ownership cost ${c.id}`);
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}
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async delete(id: string, userId: string): Promise<void> {
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// Verify ownership
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const existing = await this.repository.findById(id);
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if (!existing) {
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throw new Error('Ownership cost not found');
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}
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if (existing.userId !== userId) {
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throw new Error('Unauthorized');
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}
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totalCost += amount;
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await this.repository.delete(id);
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logger.info('Ownership cost deleted', { id, userId });
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}
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/**
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* Get aggregated cost statistics for a vehicle
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* Used by TCO calculation in vehicles service
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*/
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async getVehicleCostStats(vehicleId: string, userId: string): Promise<OwnershipCostStats> {
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const costs = await this.repository.findByVehicleId(vehicleId, userId);
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const now = new Date();
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const stats: OwnershipCostStats = {
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insuranceCosts: 0,
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registrationCosts: 0,
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taxCosts: 0,
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otherCosts: 0,
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totalCosts: 0
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};
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for (const cost of costs) {
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const startDate = new Date(cost.startDate);
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const endDate = cost.endDate ? new Date(cost.endDate) : now;
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// Skip future costs
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if (startDate > now) continue;
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// Calculate effective end date (either specified end, or now for ongoing costs)
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const effectiveEnd = endDate < now ? endDate : now;
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const monthsCovered = this.calculateMonthsBetween(startDate, effectiveEnd);
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const normalizedCost = this.normalizeToTotal(cost.amount, cost.interval, monthsCovered);
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// Type-safe key access
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const keyMap: Record<OwnershipCostType, keyof Omit<OwnershipCostStats, 'totalCosts'>> = {
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insurance: 'insuranceCosts',
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registration: 'registrationCosts',
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tax: 'taxCosts',
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other: 'otherCosts'
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};
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const key = keyMap[cost.costType];
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if (key) {
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stats[key] += normalizedCost;
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} else {
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logger.warn('Unknown cost type in aggregation', { costType: cost.costType, costId: cost.id });
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// Breakdown by cost type for backward compatibility
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switch (c.costType) {
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case 'insurance':
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insuranceCosts += amount;
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break;
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case 'registration':
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registrationCosts += amount;
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break;
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case 'tax':
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taxCosts += amount;
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break;
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case 'inspection':
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case 'parking':
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case 'other':
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otherCosts += amount;
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break;
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}
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}
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stats.totalCosts = stats.insuranceCosts + stats.registrationCosts + stats.taxCosts + stats.otherCosts;
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return stats;
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return {
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totalCost,
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recordCount: costs.length,
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insuranceCosts,
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registrationCosts,
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taxCosts,
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otherCosts
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};
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}
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/**
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* Calculate months between two dates
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*/
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private calculateMonthsBetween(startDate: Date, endDate: Date): number {
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const yearDiff = endDate.getFullYear() - startDate.getFullYear();
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const monthDiff = endDate.getMonth() - startDate.getMonth();
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return Math.max(1, yearDiff * 12 + monthDiff);
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// Alias for backward compatibility with vehicles service
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async getVehicleCostStats(vehicleId: string, userId: string): Promise<OwnershipCostStats> {
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return this.getVehicleOwnershipCosts(vehicleId, userId);
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}
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/**
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* Normalize recurring cost to total based on interval and months covered
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*/
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private normalizeToTotal(amount: number, interval: string, monthsCovered: number): number {
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// One-time costs are just the amount
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if (interval === 'one_time') {
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return amount;
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}
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async updateCost(userId: string, id: string, patch: UpdateOwnershipCostRequest): Promise<OwnershipCostResponse | null> {
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const existing = await this.repo.findById(id, userId);
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if (!existing) return null;
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const paymentsPerYear = PAYMENTS_PER_YEAR[interval as keyof typeof PAYMENTS_PER_YEAR];
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if (!paymentsPerYear) {
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logger.warn('Invalid cost interval', { interval });
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return 0;
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}
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// Convert nulls to undefined for repository compatibility
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const cleanPatch = Object.fromEntries(
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Object.entries(patch).map(([k, v]) => [k, v === null ? undefined : v])
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) as Partial<Pick<OwnershipCost, 'documentId' | 'costType' | 'amount' | 'description' | 'periodStart' | 'periodEnd' | 'notes'>>;
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// Calculate total payments over the covered period
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const yearsOwned = monthsCovered / 12;
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const totalPayments = yearsOwned * paymentsPerYear;
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return amount * totalPayments;
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const updated = await this.repo.update(id, userId, cleanPatch);
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if (!updated) return null;
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return this.toResponse(updated);
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}
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async deleteCost(userId: string, id: string): Promise<void> {
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await this.repo.delete(id, userId);
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}
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private async assertVehicleOwnership(userId: string, vehicleId: string) {
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const res = await this.db.query('SELECT id FROM vehicles WHERE id = $1 AND user_id = $2', [vehicleId, userId]);
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if (!res.rows[0]) {
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const err: any = new Error('Vehicle not found or not owned by user');
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err.statusCode = 403;
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throw err;
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}
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}
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private toResponse(cost: OwnershipCost): OwnershipCostResponse {
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return {
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id: cost.id,
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userId: cost.userId,
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vehicleId: cost.vehicleId,
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documentId: cost.documentId,
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costType: cost.costType,
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description: cost.description,
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amount: cost.amount,
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interval: cost.interval,
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startDate: cost.startDate instanceof Date ? cost.startDate.toISOString().split('T')[0] : cost.startDate as unknown as string,
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endDate: cost.endDate ? (cost.endDate instanceof Date ? cost.endDate.toISOString().split('T')[0] : cost.endDate as unknown as string) : undefined,
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createdAt: cost.createdAt instanceof Date ? cost.createdAt.toISOString() : cost.createdAt as unknown as string,
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updatedAt: cost.updatedAt instanceof Date ? cost.updatedAt.toISOString() : cost.updatedAt as unknown as string,
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};
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return cost;
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}
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}
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