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import { Inject } from '@nestjs/common'; |
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import { IQueryBus, QueryHandler } from '@nestjs/cqrs'; |
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import { InjectEntityManager } from '@nestjs/typeorm'; |
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import { EntityManager } from 'typeorm'; |
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import { IUserRepository } from 'src/Domain/HumanResource/User/Repository/IUserRepository'; |
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import { IUserAdministrativeRepository } from 'src/Domain/HumanResource/User/Repository/IUserAdministrativeRepository'; |
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import { LeaveView, PayrollElementsView } from '../View/PayrollElementsView'; |
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import { GetPayrollElementsQuery } from './GetPayrollElementsQuery'; |
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import { MealTicketSummaryView } from '../../MealTicket/Views/MealTicketSummaryView'; |
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import { CountMealTicketPerMonthQuery } from '../../MealTicket/Query/CountMealTicketPerMonthQuery'; |
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@QueryHandler(GetPayrollElementsQuery) |
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export class GetPayrollElementsQueryHandler { |
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constructor( |
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@InjectEntityManager() |
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private readonly manager: EntityManager, |
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@Inject('IQueryBus') |
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private readonly queryBus: IQueryBus, |
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@Inject('IUserRepository') |
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private readonly userRepository: IUserRepository, |
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@Inject('IUserAdministrativeRepository') |
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private readonly userAdministrativeRepository: IUserAdministrativeRepository |
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) {} |
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private async getUserMealTickets(): Promise<Map<string, number>> { |
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const currentDate = new Date(); |
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// NOTE: this code suffers from the "N+1 queries" problem, as we fetch the meal tickets count |
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// for each user. But we wanted to reuse the existing meal ticket calculation logic, |
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// which exists in JavaScript code. |
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// Ideally we would move the meal ticket calculation logic to the database. |
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const mealTicketsByUserId = new Map<string, number>(); |
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const _users = await this.userRepository.findUsers(false); |
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for (let user of _users) { |
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const userAdministrative = await this.userAdministrativeRepository.findOneByUserId( |
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user.getId() |
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); |
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if (userAdministrative.getLeavingDate() !== null) { |
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// User is not working here anymore, don't include them in the payroll elements. |
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continue; |
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} |
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const monthSummaries: MealTicketSummaryView[] = await this.queryBus.execute( |
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new CountMealTicketPerMonthQuery(user, currentDate) |
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); |
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const thisMonthSummary = monthSummaries.find( |
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view => view.month === currentDate.getMonth() |
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); |
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mealTicketsByUserId.set(user.getId(), thisMonthSummary.total); |
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} |
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return mealTicketsByUserId; |
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} |
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public async execute( |
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_: GetPayrollElementsQuery |
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): Promise<PayrollElementsView[]> { |
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const sql = ` |
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SELECT |
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"user".id AS "userId", |
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"firstName", |
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"lastName", |
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"executivePosition", |
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"joiningDate", |
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"leavingDate", |
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"annualEarnings", |
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("annualEarnings" / 12) AS "monthlyEarnings", |
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"workingTime", |
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"transportFee", |
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"healthInsurance", |
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( |
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SELECT |
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COALESCE(SUM(leave.time / 60.0 / 7.0), 0) |
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FROM leave_request |
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INNER JOIN leave ON leave."leaveRequestId" = leave_request.id |
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INNER JOIN "user" AS u ON u.id = leave_request."userId" AND u.id = "user".id |
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WHERE leave_request.status = 'accepted' |
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AND leave_request.type = 'paid' |
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AND u.id = "user".id |
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) AS "totalPaidLeaves", |
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( |
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SELECT |
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COALESCE(SUM(leave.time / 60.0 / 7.0), 0) |
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FROM leave_request |
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INNER JOIN leave ON leave."leaveRequestId" = leave_request.id |
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INNER JOIN "user" AS u ON u.id = leave_request."userId" AND u.id = "user".id |
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WHERE leave_request.status = 'accepted' |
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AND leave_request.type = 'unpaid' |
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) AS "totalUnpaidLeaves", |
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( |
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SELECT |
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COALESCE(SUM(leave.time / 60.0 / 7.0), 0) |
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FROM leave_request |
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INNER JOIN leave ON leave."leaveRequestId" = leave_request.id |
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INNER JOIN "user" AS u ON u.id = leave_request."userId" AND u.id = "user".id |
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WHERE leave_request.status = 'accepted' |
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AND leave_request.type = 'medical' |
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) AS "totalMedicalLeaves", |
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( |
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SELECT |
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COALESCE(SUM(leave.time / 60.0 / 7.0), 0) |
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FROM leave_request |
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INNER JOIN leave ON leave."leaveRequestId" = leave_request.id |
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INNER JOIN "user" AS u ON u.id = leave_request."userId" AND u.id = "user".id |
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WHERE leave_request.status = 'accepted' |
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AND leave_request.type = 'special' |
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) AS "totalSpecialLeaves" |
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FROM "user" |
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INNER JOIN user_administrative AS user_a ON "user"."userAdministrativeId" = user_a.id |
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WHERE user_a."leavingDate" IS NULL; |
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`; |
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const rows = await this.manager.query(sql); |
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const leaveSql = ` |
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SELECT |
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"user".id AS "userId", |
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"startDate", |
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"endDate" |
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FROM leave_request |
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INNER JOIN "user" ON "user".id = leave_request."userId" |
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WHERE leave_request.status = 'accepted' |
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ORDER BY "startDate"; |
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`; |
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const leaveRows = await this.manager.query(leaveSql); |
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const mealTicketsByUserId = await this.getUserMealTickets(); |
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return rows.map( |
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({ |
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userId, |
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firstName, |
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lastName, |
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executivePosition, |
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joiningDate, |
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leavingDate, |
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annualEarnings, |
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monthlyEarnings, |
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workingTime, |
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transportFee, |
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healthInsurance, |
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totalPaidLeaves, |
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totalUnpaidLeaves, |
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totalMedicalLeaves, |
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totalSpecialLeaves |
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}) => { |
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const leaves = leaveRows |
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.filter(({ userId: leaveUserId }) => leaveUserId === userId) |
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.map(({ startDate, endDate }) => new LeaveView(startDate, endDate)); |
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const mealTickets = mealTicketsByUserId.get(userId); |
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return new PayrollElementsView( |
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userId, |
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firstName, |
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lastName, |
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executivePosition, |
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joiningDate, |
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leavingDate, |
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+annualEarnings * 0.01, |
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+monthlyEarnings * 0.01, |
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workingTime, |
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+transportFee * 0.01, |
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mealTickets, |
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healthInsurance, |
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+totalPaidLeaves, |
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+totalUnpaidLeaves, |
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+totalMedicalLeaves, |
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+totalSpecialLeaves, |
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leaves |
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); |
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} |
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); |
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} |
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} |
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fairnesscoop /
permacoop
