All files / src/domains/mdm/application/services master-data-version.service.ts

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import {
  Injectable,
  Logger,
  NotFoundException,
  BadRequestException,
} from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { Model } from 'mongoose';
import { MasterDataVersion } from '../../infrastructure/schemas/master-data-record.schema';
import { MasterDataRecord } from '../../infrastructure/schemas/master-data-record.schema';
 
@Injectable()
export class MasterDataVersionService {
  private readonly logger = new Logger(MasterDataVersionService.name);
 
  constructor(
    @InjectModel(MasterDataVersion.name)
    private readonly versionModel: Model<MasterDataVersion>,
    @InjectModel(MasterDataRecord.name)
    private readonly recordModel: Model<MasterDataRecord>,
  ) {}
 
  async createSnapshot(
    recordId: string,
    changeReason?: string,
    publishedBy?: string,
  ): Promise<any> {
    const record = await this.recordModel.findById(recordId).lean().exec();
    if (!record) throw new NotFoundException(`Record not found: ${recordId}`);
 
    const lastVersion = await this.versionModel
      .findOne({ recordId: record._id })
      .sort({ versionNumber: -1 })
      .lean()
      .exec();
    const nextVersion = (lastVersion?.versionNumber || 0) + 1;
 
    // Supersede previous version
    if (lastVersion) {
      await this.versionModel.updateOne(
        { _id: lastVersion._id },
        { $set: { status: 'superseded', effectiveTo: new Date() } },
      );
    }
 
    const version = await this.versionModel.create({
      recordId: record._id,
      definitionKey: record.definitionKey,
      recordCode: record.recordCode,
      versionNumber: nextVersion,
      snapshotData: { ...record, _id: undefined },
      changeReason,
      status: 'published',
      publishedBy,
      publishedAt: new Date(),
      effectiveFrom: new Date(),
    });
 
    // Update record version counter
    await this.recordModel.updateOne(
      { _id: record._id },
      { $set: { version: nextVersion, currentVersionId: version._id } },
    );
 
    this.logger.log(
      `Version ${nextVersion} created for ${record.definitionKey}/${record.recordCode}`,
    );
    return this.toDTO(version);
  }
 
  async getVersionHistory(recordId: string): Promise<any[]> {
    const versions = await this.versionModel
      .find({ recordId })
      .sort({ versionNumber: -1 })
      .lean()
      .exec();
    return versions.map((v) => this.toDTO(v));
  }
 
  async getVersion(recordId: string, versionNumber: number): Promise<any> {
    const version = await this.versionModel
      .findOne({ recordId, versionNumber })
      .lean()
      .exec();
    if (!version)
      throw new NotFoundException(
        `Version ${versionNumber} not found for record ${recordId}`,
      );
    return this.toDTO(version);
  }
 
  async rollback(
    recordId: string,
    targetVersionNumber: number,
    userId: string,
  ): Promise<any> {
    const version = await this.versionModel
      .findOne({ recordId, versionNumber: targetVersionNumber })
      .lean()
      .exec();
    if (!version)
      throw new NotFoundException(`Version ${targetVersionNumber} not found`);
 
    const record = await this.recordModel.findById(recordId).exec();
    if (!record) throw new NotFoundException(`Record not found: ${recordId}`);
    if (record.systemManaged)
      throw new BadRequestException('Cannot rollback a system-managed record');
 
    // Apply snapshot data back to the record
    const snapshot = version.snapshotData || {};
    record.recordName = snapshot.recordName || record.recordName;
    record.shortName = snapshot.shortName;
    record.description = snapshot.description;
    record.attributes = snapshot.attributes || {};
    record.metadata = snapshot.metadata || {};
    record.updatedBy = userId as any;
    await record.save();
 
    // Create a new version reflecting the rollback
    await this.createSnapshot(
      recordId,
      `Rollback to version ${targetVersionNumber}`,
      userId,
    );
 
    this.logger.log(
      `Rolled back record ${recordId} to version ${targetVersionNumber}`,
    );
    return this.toDTO(record);
  }
 
  private toDTO(doc: any): any {
    const obj = doc.toObject ? doc.toObject() : doc;
    return {
      id: obj._id?.toString(),
      recordId: obj.recordId?.toString(),
      definitionKey: obj.definitionKey,
      recordCode: obj.recordCode,
      versionNumber: obj.versionNumber,
      snapshotData: obj.snapshotData,
      changeReason: obj.changeReason,
      status: obj.status,
      publishedBy: obj.publishedBy?.toString(),
      publishedAt: obj.publishedAt,
      effectiveFrom: obj.effectiveFrom,
      effectiveTo: obj.effectiveTo,
      createdAt: obj.createdAt,
    };
  }
}