Initial commit: ERP system with advance verification fixes

backend/src/modules/customers/customers.service.ts

@@ -0,0 +1,64 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { Customer } from './customer.entity';
+
+@Injectable()
+export class CustomersService {
+  constructor(
+    @InjectRepository(Customer)
+    private customersRepository: Repository<Customer>,
+  ) {}
+
+  async create(customerData: Partial<Customer>): Promise<Customer> {
+    const customer = this.customersRepository.create(customerData);
+    return this.customersRepository.save(customer);
+  }
+
+  async findAll(): Promise<Customer[]> {
+    return this.customersRepository.find();
+  }
+
+  async findOne(id: string): Promise<Customer> {
+    const customer = await this.customersRepository.findOne({ where: { id } });
+    if (!customer) {
+      throw new NotFoundException(`Customer with id ${id} not found`);
+    }
+    return customer;
+  }
+
+  async update(id: string, customerData: Partial<Customer>): Promise<Customer> {
+    const customer = await this.findOne(id);
+    Object.assign(customer, customerData);
+    return this.customersRepository.save(customer);
+  }
+
+  async remove(id: string): Promise<void> {
+    const result = await this.customersRepository.delete(id);
+    if (result.affected === 0) {
+      throw new NotFoundException(`Customer with id ${id} not found`);
+    }
+  }
+
+  async findWithProjects(id: string): Promise<Customer> {
+    const customer = await this.customersRepository.findOne({
+      where: { id },
+      relations: ['projects'],
+    });
+    if (!customer) {
+      throw new NotFoundException(`Customer with id ${id} not found`);
+    }
+    return customer;
+  }
+
+  async findWithQuotations(id: string): Promise<Customer> {
+    const customer = await this.customersRepository.findOne({
+      where: { id },
+      relations: ['quotations'],
+    });
+    if (!customer) {
+      throw new NotFoundException(`Customer with id ${id} not found`);
+    }
+    return customer;
+  }
+}