All files / src/domains/hr/attendance/regularization regularization.service.ts

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import { Injectable, NotFoundException } from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { Model } from 'mongoose';
import {
  AttendanceRegularizationRequest,
  AttendanceRegularizationAction,
  AttendanceCorrection,
  AttendancePunch,
} from '../schemas';
import {
  RequestRegularizationDto,
  ActionRegularizationDto,
} from './dto/regularization.dto';
import { AttendanceCalculationEngine } from '../engine/engine.service';
 
@Injectable()
export class RegularizationService {
  constructor(
    @InjectModel(AttendanceRegularizationRequest.name)
    private requestModel: Model<AttendanceRegularizationRequest>,
    @InjectModel(AttendanceRegularizationAction.name)
    private actionModel: Model<AttendanceRegularizationAction>,
    @InjectModel(AttendanceCorrection.name)
    private correctionModel: Model<AttendanceCorrection>,
    @InjectModel(AttendancePunch.name)
    private punchModel: Model<AttendancePunch>,
    private engine: AttendanceCalculationEngine,
  ) {}
 
  async submitRequest(
    tenantId: string,
    employeeId: string,
    requestDto: RequestRegularizationDto,
  ) {
    const created = new this.requestModel({
      ...requestDto,
      tenantId,
      employeeId,
      submittedAt: new Date(),
    });
    return created.save();
  }
 
  async processAction(
    tenantId: string,
    requestId: string,
    actionDto: ActionRegularizationDto,
    approverId: string,
  ) {
    const request = await this.requestModel
      .findOne({ _id: requestId, tenantId })
      .exec();
    if (!request)
      throw new NotFoundException('Regularization request not found');
 
    request.status = actionDto.action;
    request.resolvedAt = new Date();
    await request.save();
 
    await this.actionModel.create({
      tenantId,
      requestId,
      actionBy: approverId,
      action: actionDto.action,
      comments: actionDto.comments,
    });
 
    // If approved, create Correction Records and invalidate old punches
    if (actionDto.action === 'approved') {
      await this.applyCorrection(tenantId, request, approverId);
      // Re-trigger calculation
      await this.engine.calculateDailyAttendance(
        tenantId,
        request.employeeId,
        request.attendanceDate,
      );
    }
 
    return request;
  }
 
  private async applyCorrection(
    tenantId: string,
    request: AttendanceRegularizationRequest,
    approverId: string,
  ) {
    await this.correctionModel.create({
      tenantId,
      employeeId: request.employeeId,
      attendanceDate: request.attendanceDate,
      regularizationRequestId: request._id,
      correctedCheckIn: request.requestedCheckIn,
      correctedCheckOut: request.requestedCheckOut,
      correctedBy: approverId,
    });
 
    // Mark previous punches for that date as corrected=true so they are ignored by engine
    await this.punchModel.updateMany(
      {
        tenantId,
        employeeId: request.employeeId,
        attendanceDate: request.attendanceDate,
        corrected: false,
      },
      {
        $set: {
          corrected: true,
          correctionReason: `Regularization ${request._id}`,
        },
      },
    );
 
    // Insert new valid punches based on the approved request
    if (request.requestedCheckIn) {
      await this.punchModel.create({
        tenantId,
        employeeId: request.employeeId,
        attendanceDate: request.attendanceDate,
        punchType: 'Check In',
        timestamp: request.requestedCheckIn,
        timezone: 'UTC',
        source: 'Admin',
        createdBy: approverId,
        metadata: { isRegularization: true, requestId: request._id },
      });
    }
 
    if (request.requestedCheckOut) {
      await this.punchModel.create({
        tenantId,
        employeeId: request.employeeId,
        attendanceDate: request.attendanceDate,
        punchType: 'Check Out',
        timestamp: request.requestedCheckOut,
        timezone: 'UTC',
        source: 'Admin',
        createdBy: approverId,
        metadata: { isRegularization: true, requestId: request._id },
      });
    }
  }
 
  async getMyRequests(tenantId: string, employeeId: string) {
    return this.requestModel
      .find({ tenantId, employeeId })
      .sort({ submittedAt: -1 })
      .exec();
  }
 
  async getPendingRequestsForApprover(tenantId: string, approverId: string) {
    // Basic stub. Real life handles complex hierarchies.
    return this.requestModel.find({ tenantId, status: 'pending' }).exec();
  }
}