251120:1700 Backend T3.4
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import {
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Injectable,
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NotFoundException,
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BadRequestException,
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InternalServerErrorException,
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} from '@nestjs/common';
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import { InjectRepository } from '@nestjs/typeorm';
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import { Repository, DataSource } from 'typeorm';
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// Entities
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import { Correspondence } from './entities/correspondence.entity.js';
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import { CorrespondenceRevision } from './entities/correspondence-revision.entity.js';
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import { CorrespondenceType } from './entities/correspondence-type.entity.js';
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import { CorrespondenceStatus } from './entities/correspondence-status.entity.js';
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import { RoutingTemplate } from './entities/routing-template.entity.js';
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import { CorrespondenceRouting } from './entities/correspondence-routing.entity.js';
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import { User } from '../user/entities/user.entity.js';
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// DTOs
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import { CreateCorrespondenceDto } from './dto/create-correspondence.dto.js';
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// Services
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import { DocumentNumberingService } from '../document-numbering/document-numbering.service.js';
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import { JsonSchemaService } from '../json-schema/json-schema.service.js';
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import { WorkflowEngineService } from '../workflow-engine/workflow-engine.service.js';
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@Injectable()
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export class CorrespondenceService {
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constructor(
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@InjectRepository(Correspondence)
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private correspondenceRepo: Repository<Correspondence>,
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@InjectRepository(CorrespondenceRevision)
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private revisionRepo: Repository<CorrespondenceRevision>,
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@InjectRepository(CorrespondenceType)
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private typeRepo: Repository<CorrespondenceType>,
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@InjectRepository(CorrespondenceStatus)
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private statusRepo: Repository<CorrespondenceStatus>,
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@InjectRepository(RoutingTemplate)
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private templateRepo: Repository<RoutingTemplate>,
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@InjectRepository(CorrespondenceRouting)
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private routingRepo: Repository<CorrespondenceRouting>,
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private numberingService: DocumentNumberingService,
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private jsonSchemaService: JsonSchemaService,
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private workflowEngine: WorkflowEngineService,
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private dataSource: DataSource,
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) {}
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/**
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* สร้างเอกสารใหม่ (Create Correspondence)
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* - ตรวจสอบสิทธิ์และข้อมูลพื้นฐาน
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* - Validate JSON Details ตาม Type
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* - ขอเลขที่เอกสาร (Redis Lock)
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* - บันทึกข้อมูลลง DB (Transaction)
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*/
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async create(createDto: CreateCorrespondenceDto, user: User) {
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// 1. ตรวจสอบข้อมูลพื้นฐาน (Type, Status, Org)
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const type = await this.typeRepo.findOne({
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where: { id: createDto.typeId },
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});
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if (!type) throw new NotFoundException('Document Type not found');
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const statusDraft = await this.statusRepo.findOne({
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where: { statusCode: 'DRAFT' },
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});
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if (!statusDraft) {
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throw new InternalServerErrorException(
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'Status DRAFT not found in Master Data',
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);
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}
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const userOrgId = user.primaryOrganizationId;
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if (!userOrgId) {
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throw new BadRequestException(
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'User must belong to an organization to create documents',
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);
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}
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// 2. Validate JSON Details (ถ้ามี)
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if (createDto.details) {
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try {
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// ใช้ Type Code เป็น Key ในการค้นหา Schema (เช่น 'RFA', 'LETTER')
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await this.jsonSchemaService.validate(type.typeCode, createDto.details);
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} catch (error: any) {
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// บันทึก Warning หรือ Throw Error ตามนโยบาย (ในที่นี้ให้ผ่านไปก่อนถ้ายังไม่สร้าง Schema)
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console.warn(
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`Schema validation warning for ${type.typeCode}: ${error.message}`,
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);
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}
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}
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// 3. เริ่ม Transaction
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const queryRunner = this.dataSource.createQueryRunner();
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await queryRunner.connect();
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await queryRunner.startTransaction();
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try {
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// 3.1 ขอเลขที่เอกสาร (Double-Lock Mechanism)
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// Mock ค่า replacements ไว้ก่อน (จริงๆ ต้อง Join เอา Org Code มา)
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const docNumber = await this.numberingService.generateNextNumber(
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createDto.projectId,
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userOrgId,
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createDto.typeId,
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new Date().getFullYear(),
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{
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TYPE_CODE: type.typeCode,
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ORG_CODE: 'ORG', // TODO: Fetch real organization code
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},
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);
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// 3.2 สร้าง Correspondence (หัวจดหมาย)
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const correspondence = queryRunner.manager.create(Correspondence, {
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correspondenceNumber: docNumber,
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correspondenceTypeId: createDto.typeId,
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projectId: createDto.projectId,
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originatorId: userOrgId,
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isInternal: createDto.isInternal || false,
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createdBy: user.user_id,
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});
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const savedCorr = await queryRunner.manager.save(correspondence);
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// 3.3 สร้าง Revision แรก (Rev 0)
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const revision = queryRunner.manager.create(CorrespondenceRevision, {
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correspondenceId: savedCorr.id,
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revisionNumber: 0,
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revisionLabel: 'A',
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isCurrent: true,
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statusId: statusDraft.id,
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title: createDto.title,
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details: createDto.details,
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createdBy: user.user_id,
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});
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await queryRunner.manager.save(revision);
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// 4. Commit Transaction
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await queryRunner.commitTransaction();
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return {
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...savedCorr,
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currentRevision: revision,
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};
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} catch (err) {
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// Rollback หากเกิดข้อผิดพลาด
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await queryRunner.rollbackTransaction();
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throw err;
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} finally {
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await queryRunner.release();
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}
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}
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/**
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* ดึงข้อมูลเอกสารทั้งหมด (สำหรับ List Page)
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*/
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async findAll() {
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return this.correspondenceRepo.find({
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relations: ['revisions', 'type', 'project', 'originator'],
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order: { createdAt: 'DESC' },
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});
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}
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/**
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* ดึงข้อมูลเอกสารรายตัว (Detail Page)
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*/
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async findOne(id: number) {
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const correspondence = await this.correspondenceRepo.findOne({
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where: { id },
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relations: ['revisions', 'type', 'project', 'originator'],
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});
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if (!correspondence) {
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throw new NotFoundException(`Correspondence with ID ${id} not found`);
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}
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return correspondence;
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}
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/**
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* ส่งเอกสาร (Submit) เพื่อเริ่ม Workflow การอนุมัติ/ส่งต่อ
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*/
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async submit(correspondenceId: number, templateId: number, user: User) {
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// 1. ดึงข้อมูลเอกสารและหา Revision ปัจจุบัน
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const correspondence = await this.correspondenceRepo.findOne({
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where: { id: correspondenceId },
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relations: ['revisions'],
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});
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if (!correspondence) {
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throw new NotFoundException('Correspondence not found');
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}
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// หา Revision ที่เป็น current
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const currentRevision = correspondence.revisions?.find((r) => r.isCurrent);
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if (!currentRevision) {
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throw new NotFoundException('Current revision not found');
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}
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// 2. ดึงข้อมูล Template และ Steps
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const template = await this.templateRepo.findOne({
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where: { id: templateId },
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relations: ['steps'],
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order: { steps: { sequence: 'ASC' } },
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});
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if (!template || !template.steps?.length) {
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throw new BadRequestException(
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'Invalid routing template or no steps defined',
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);
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}
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// 3. เริ่ม Transaction
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const queryRunner = this.dataSource.createQueryRunner();
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await queryRunner.connect();
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await queryRunner.startTransaction();
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try {
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const firstStep = template.steps[0];
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// 3.1 สร้าง Routing Record แรก (Log การส่งต่อ)
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const routing = queryRunner.manager.create(CorrespondenceRouting, {
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correspondenceId: currentRevision.id, // เชื่อมกับ Revision ID
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sequence: 1,
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fromOrganizationId: user.primaryOrganizationId,
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toOrganizationId: firstStep.toOrganizationId,
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stepPurpose: firstStep.stepPurpose,
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status: 'SENT', // สถานะเริ่มต้นของการส่ง
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dueDate: new Date(
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Date.now() + (firstStep.expectedDays || 7) * 24 * 60 * 60 * 1000,
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),
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processedByUserId: user.user_id, // ผู้ส่ง (User ปัจจุบัน)
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processedAt: new Date(),
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});
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await queryRunner.manager.save(routing);
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// 3.2 (Optional) อัปเดตสถานะของ Revision เป็น 'SUBMITTED'
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// const statusSubmitted = await this.statusRepo.findOne({ where: { statusCode: 'SUBMITTED' } });
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// if (statusSubmitted) {
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// currentRevision.statusId = statusSubmitted.id;
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// await queryRunner.manager.save(currentRevision);
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// }
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await queryRunner.commitTransaction();
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return routing;
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} catch (err) {
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await queryRunner.rollbackTransaction();
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throw err;
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} finally {
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await queryRunner.release();
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}
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}
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}
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