All files / src/domains/hr/organization branch.service.ts

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import {
  Injectable,
  NotFoundException,
  BadRequestException,
  ConflictException,
} from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { Model } from 'mongoose';
import { Branch } from './schemas/branch.schema';
import { AuditLogService } from '../../../platform/audit/audit-log.service';
import { EventBusService } from '../../../platform/events/event-bus.service';
 
@Injectable()
export class BranchService {
  constructor(
    @InjectModel(Branch.name) private readonly branchModel: Model<Branch>,
    private readonly auditLog: AuditLogService,
    private readonly eventBus: EventBusService,
  ) {}
 
  async create(tenantId: string, data: any, userId: string) {
    const existing = await this.branchModel
      .findOne({ tenantId, branchCode: data.branchCode })
      .exec();
    if (existing)
      throw new ConflictException(
        `Branch code ${data.branchCode} already exists.`,
      );
 
    if (data.parentBranchId) {
      const parent = await this.branchModel
        .findOne({ tenantId, _id: data.parentBranchId })
        .exec();
      if (!parent)
        throw new BadRequestException(
          'Parent branch not found in this tenant.',
        );
    }
 
    const branch = await this.branchModel.create({
      ...data,
      tenantId,
      createdBy: userId,
    });
 
    await this.auditLog.log({
      tenantId,
      userId,
      action: 'CREATE',
      resource: 'Branch',
      resourceId: branch.id,
      newValues: data,
      moduleName: 'HR',
    });
    await this.eventBus.publish(
      'hr.branch.created.v1',
      { tenantId, branchId: branch.id },
      tenantId,
    );
    return branch;
  }
 
  async findAll(tenantId: string, filters?: any) {
    const query: any = { tenantId, deletedAt: null };
    if (filters?.status) query.status = filters.status;
    return this.branchModel.find(query).sort({ branchName: 1 }).lean().exec();
  }
 
  async findOne(tenantId: string, id: string) {
    const branch = await this.branchModel
      .findOne({ tenantId, _id: id, deletedAt: null })
      .lean()
      .exec();
    if (!branch) throw new NotFoundException('Branch not found');
    return branch;
  }
 
  async update(tenantId: string, id: string, data: any, userId: string) {
    const branch = await this.branchModel
      .findOne({ tenantId, _id: id, deletedAt: null })
      .exec();
    if (!branch) throw new NotFoundException('Branch not found');
 
    if (data.branchCode && data.branchCode !== branch.branchCode) {
      const dup = await this.branchModel
        .findOne({ tenantId, branchCode: data.branchCode })
        .exec();
      if (dup)
        throw new ConflictException(
          `Branch code ${data.branchCode} already exists.`,
        );
    }
 
    const oldValues = branch.toObject();
    Object.assign(branch, data, { updatedBy: userId });
    await branch.save();
 
    await this.auditLog.log({
      tenantId,
      userId,
      action: 'UPDATE',
      resource: 'Branch',
      resourceId: branch.id,
      oldValues,
      newValues: data,
      moduleName: 'HR',
    });
    await this.eventBus.publish(
      'hr.branch.updated.v1',
      { tenantId, branchId: branch.id },
      tenantId,
    );
    return branch;
  }
 
  async delete(
    tenantId: string,
    id: string,
    userId: string,
    employeeModel?: Model<any>,
  ) {
    const branch = await this.branchModel
      .findOne({ tenantId, _id: id, deletedAt: null })
      .exec();
    if (!branch) throw new NotFoundException('Branch not found');
 
    if (employeeModel) {
      const activeCount = await employeeModel.countDocuments({
        tenantId,
        branchId: id,
        employmentStatus: { $nin: ['terminated', 'archived'] },
      });
      if (activeCount > 0)
        throw new BadRequestException(
          'Cannot delete branch with active employees.',
        );
    }
 
    branch.deletedAt = new Date();
    branch.updatedBy = userId;
    await branch.save();
 
    await this.auditLog.log({
      tenantId,
      userId,
      action: 'DELETE',
      resource: 'Branch',
      resourceId: branch.id,
      moduleName: 'HR',
    });
    return { success: true };
  }
}