add businesses CRUD module

src/app.module.ts

@@ -5,12 +5,14 @@ import { AppController } from './app.controller';
 import { AppService } from './app.service';
 import { dataSourceOptions } from './config/typeorm.config';
 import { BusinessCategoriesModule } from './modules/business-categories/business-categories.module';
+import { BusinessesModule } from './modules/businesses/businesses.module';
 
 @Module({
   imports: [
     ConfigModule.forRoot({ isGlobal: true }),
     TypeOrmModule.forRoot(dataSourceOptions),
     BusinessCategoriesModule,
+    BusinessesModule,
   ],
   controllers: [AppController],
   providers: [AppService],

src/modules/businesses/businesses.controller.ts

@@ -0,0 +1,57 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
+import { BusinessEntity } from '../../entities/business.entity';
+import { BusinessesService } from './businesses.service';
+import { CreateBusinessDto } from './dto/create-business.dto';
+import { UpdateBusinessDto } from './dto/update-business.dto';
+
+@Controller('businesses')
+export class BusinessesController {
+  constructor(private readonly service: BusinessesService) {}
+
+  @Get()
+  findAll(
+    @Query('categoryId') categoryId?: string,
+    @Query('isActive') isActive?: string,
+  ): Promise<BusinessEntity[]> {
+    const parsedIsActive =
+      typeof isActive === 'string' ? isActive === 'true' : undefined;
+
+    return this.service.findAll({
+      categoryId,
+      isActive: parsedIsActive,
+    });
+  }
+
+  @Get(':id')
+  findOne(@Param('id') id: string): Promise<BusinessEntity> {
+    return this.service.findOne(id);
+  }
+
+  @Post()
+  create(@Body() payload: CreateBusinessDto): Promise<BusinessEntity> {
+    return this.service.create(payload);
+  }
+
+  @Patch(':id')
+  update(
+    @Param('id') id: string,
+    @Body() payload: UpdateBusinessDto,
+  ): Promise<BusinessEntity> {
+    return this.service.update(id, payload);
+  }
+
+  @Delete(':id')
+  async remove(@Param('id') id: string): Promise<{ success: true }> {
+    await this.service.remove(id);
+    return { success: true };
+  }
+}

src/modules/businesses/businesses.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { BusinessCategoryEntity } from '../../entities/business-category.entity';
+import { BusinessEntity } from '../../entities/business.entity';
+import { BusinessesController } from './businesses.controller';
+import { BusinessesService } from './businesses.service';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([BusinessEntity, BusinessCategoryEntity])],
+  controllers: [BusinessesController],
+  providers: [BusinessesService],
+})
+export class BusinessesModule {}

src/modules/businesses/businesses.service.ts

@@ -0,0 +1,114 @@
+import {
+  ConflictException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { BusinessCategoryEntity } from '../../entities/business-category.entity';
+import { BusinessEntity } from '../../entities/business.entity';
+import { CreateBusinessDto } from './dto/create-business.dto';
+import { UpdateBusinessDto } from './dto/update-business.dto';
+
+type FindAllFilters = {
+  categoryId?: string;
+  isActive?: boolean;
+};
+
+@Injectable()
+export class BusinessesService {
+  constructor(
+    @InjectRepository(BusinessEntity)
+    private readonly repo: Repository<BusinessEntity>,
+    @InjectRepository(BusinessCategoryEntity)
+    private readonly categoryRepo: Repository<BusinessCategoryEntity>,
+  ) {}
+
+  async findAll(filters: FindAllFilters): Promise<BusinessEntity[]> {
+    const query = this.repo
+      .createQueryBuilder('business')
+      .leftJoinAndSelect('business.category', 'category')
+      .orderBy('business.createdAt', 'DESC');
+
+    if (filters.categoryId) {
+      query.andWhere('business.categoryId = :categoryId', {
+        categoryId: filters.categoryId,
+      });
+    }
+
+    if (typeof filters.isActive === 'boolean') {
+      query.andWhere('business.isActive = :isActive', {
+        isActive: filters.isActive,
+      });
+    }
+
+    return query.getMany();
+  }
+
+  async findOne(id: string): Promise<BusinessEntity> {
+    const business = await this.repo.findOne({
+      where: { id },
+      relations: { category: true },
+    });
+    if (!business) {
+      throw new NotFoundException('Business not found');
+    }
+    return business;
+  }
+
+  async create(payload: CreateBusinessDto): Promise<BusinessEntity> {
+    const slugTaken = await this.repo.findOne({ where: { slug: payload.slug } });
+    if (slugTaken) {
+      throw new ConflictException('Slug already exists');
+    }
+
+    await this.ensureCategoryExists(payload.categoryId);
+
+    const entity = this.repo.create({
+      title: payload.title,
+      slug: payload.slug,
+      categoryId: payload.categoryId,
+      description: payload.description ?? null,
+      contactPhone: payload.contactPhone ?? null,
+      address: payload.address ?? null,
+      latitude: payload.latitude ?? null,
+      longitude: payload.longitude ?? null,
+      ownerId: payload.ownerId ?? null,
+      isActive: payload.isActive ?? true,
+    });
+
+    return this.repo.save(entity);
+  }
+
+  async update(id: string, payload: UpdateBusinessDto): Promise<BusinessEntity> {
+    const business = await this.findOne(id);
+
+    if (payload.slug && payload.slug !== business.slug) {
+      const slugTaken = await this.repo.findOne({ where: { slug: payload.slug } });
+      if (slugTaken) {
+        throw new ConflictException('Slug already exists');
+      }
+    }
+
+    if (payload.categoryId && payload.categoryId !== business.categoryId) {
+      await this.ensureCategoryExists(payload.categoryId);
+    }
+
+    Object.assign(business, payload);
+    return this.repo.save(business);
+  }
+
+  async remove(id: string): Promise<void> {
+    const result = await this.repo.delete(id);
+    if (!result.affected) {
+      throw new NotFoundException('Business not found');
+    }
+  }
+
+  private async ensureCategoryExists(categoryId: string): Promise<void> {
+    const category = await this.categoryRepo.findOne({ where: { id: categoryId } });
+    if (!category) {
+      throw new NotFoundException('Business category not found');
+    }
+  }
+}

src/modules/businesses/dto/create-business.dto.ts

@@ -0,0 +1,12 @@
+export class CreateBusinessDto {
+  title!: string;
+  slug!: string;
+  categoryId!: string;
+  description?: string;
+  contactPhone?: string;
+  address?: string;
+  latitude?: number;
+  longitude?: number;
+  ownerId?: string;
+  isActive?: boolean;
+}

src/modules/businesses/dto/update-business.dto.ts

@@ -0,0 +1,12 @@
+export class UpdateBusinessDto {
+  title?: string;
+  slug?: string;
+  categoryId?: string;
+  description?: string | null;
+  contactPhone?: string | null;
+  address?: string | null;
+  latitude?: number | null;
+  longitude?: number | null;
+  ownerId?: string | null;
+  isActive?: boolean;
+}