feat: backend API NestJS + Prisma + JWT auth + todos los módulos

backend/src/locations/locations.controller.ts

@@ -0,0 +1,24 @@
+import { Controller, Get, Param } from '@nestjs/common';
+import { ApiTags } from '@nestjs/swagger';
+import { LocationsService } from './locations.service';
+
+@ApiTags('Locations')
+@Controller('locations')
+export class LocationsController {
+  constructor(private locations: LocationsService) {}
+
+  @Get('countries')
+  getCountries() {
+    return this.locations.getCountries();
+  }
+
+  @Get('countries/:countryId/regions')
+  getRegions(@Param('countryId') id: string) {
+    return this.locations.getRegions(id);
+  }
+
+  @Get('regions/:regionId/cities')
+  getCities(@Param('regionId') id: string) {
+    return this.locations.getCities(id);
+  }
+}

backend/src/locations/locations.module.ts

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+import { Module } from '@nestjs/common';
+import { LocationsService } from './locations.service';
+import { LocationsController } from './locations.controller';
+
+@Module({
+  providers: [LocationsService],
+  controllers: [LocationsController],
+})
+export class LocationsModule {}

backend/src/locations/locations.service.ts

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+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+
+@Injectable()
+export class LocationsService {
+  constructor(private prisma: PrismaService) {}
+
+  getCountries() {
+    return this.prisma.countries.findMany({ include: { regions: { include: { cities: true } } } });
+  }
+
+  getRegions(countryId: string) {
+    return this.prisma.regions.findMany({ where: { country_id: countryId }, include: { cities: true } });
+  }
+
+  getCities(regionId: string) {
+    return this.prisma.cities.findMany({ where: { region_id: regionId } });
+  }
+}