All files / src/domains/assets/services asset-assignment.service.ts

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import { Injectable, BadRequestException } from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { Model, Types } from 'mongoose';
import { Asset, AssetAssignment, AssetTransfer } from '../schemas';
 
@Injectable()
export class AssetAssignmentService {
  constructor(
    @InjectModel(Asset.name)
    private readonly assetModel: Model<Asset>,
    @InjectModel(AssetAssignment.name)
    private readonly assignmentModel: Model<AssetAssignment>,
    @InjectModel(AssetTransfer.name)
    private readonly transferModel: Model<AssetTransfer>
  ) {}
 
  async assignAsset(
    tenantId: string,
    assetId: string,
    assigneeType: string,
    assigneeId: string,
    notes?: string
  ): Promise<AssetAssignment> {
    const asset = await this.assetModel.findOne({ _id: assetId, tenantId }).exec();
    if (!asset) throw new BadRequestException('Asset not found');
    if (asset.status === 'assigned' || asset.status === 'disposed') {
      throw new BadRequestException(`Asset status is ${asset.status}. Cannot assign.`);
    }
 
    const assignment = new this.assignmentModel({
      tenantId,
      assetId: new Types.ObjectId(assetId),
      assignedToType: assigneeType,
      assignedToId: assigneeId,
      status: 'pending_acknowledgement',
      notes
    });
 
    asset.status = 'assigned';
    asset.employeeCustodianId = assigneeType === 'Employee' ? assigneeId : undefined;
    asset.departmentId = assigneeType === 'Department' ? assigneeId : undefined;
    await asset.save();
 
    return assignment.save();
  }
 
  async acknowledgeCustody(tenantId: string, assignmentId: string, accept: boolean, notes?: string): Promise<AssetAssignment> {
    const assignment = await this.assignmentModel.findOne({ _id: assignmentId, tenantId }).exec();
    if (!assignment) throw new BadRequestException('Assignment not found');
 
    assignment.status = accept ? 'active' : 'rejected';
    assignment.acknowledgementNotes = notes;
    await assignment.save();
 
    if (!accept) {
      // Revert status to available
      await this.assetModel.updateOne({ _id: assignment.assetId }, { status: 'available', employeeCustodianId: null });
    }
 
    return assignment;
  }
 
  async returnAsset(tenantId: string, assignmentId: string, damageDetails?: string, missingAcc?: string): Promise<AssetAssignment> {
    const assignment = await this.assignmentModel.findOne({ _id: assignmentId, tenantId }).exec();
    if (!assignment) throw new BadRequestException('Assignment not found');
 
    assignment.status = 'returned';
    assignment.returnedAt = new Date();
    assignment.returnNotes = damageDetails || missingAcc ? `Damage: ${damageDetails || 'None'}, Missing: ${missingAcc || 'None'}` : 'Returned in good condition';
    await assignment.save();
 
    await this.assetModel.updateOne({ _id: assignment.assetId }, {
      status: 'available',
      employeeCustodianId: null,
      condition: damageDetails ? 'Damaged' : 'Good'
    });
 
    return assignment;
  }
 
  // Inter-branch relocate transfer
  async initiateTransfer(tenantId: string, assetId: string, fromLoc: string, toLoc: string, requestedBy: string): Promise<AssetTransfer> {
    const asset = await this.assetModel.findOne({ _id: assetId, tenantId }).exec();
    if (!asset) throw new BadRequestException('Asset not found');
 
    const transfer = new this.transferModel({
      tenantId,
      assetId: new Types.ObjectId(assetId),
      fromLocationId: fromLoc,
      toLocationId: toLoc,
      status: 'pending_approval',
      requestedById: requestedBy
    });
 
    return transfer.save();
  }
 
  async approveAndDispatchTransfer(tenantId: string, transferId: string, userId: string): Promise<AssetTransfer> {
    const transfer = await this.transferModel.findOne({ _id: transferId, tenantId }).exec();
    if (!transfer) throw new BadRequestException('Transfer not found');
 
    transfer.status = 'in_transit';
    transfer.approvedById = userId;
    transfer.dispatchedAt = new Date();
    await transfer.save();
 
    await this.assetModel.updateOne({ _id: transfer.assetId }, { status: 'in_transit' });
 
    return transfer;
  }
 
  async receiveTransfer(tenantId: string, transferId: string, notes?: string): Promise<AssetTransfer> {
    const transfer = await this.transferModel.findOne({ _id: transferId, tenantId }).exec();
    if (!transfer) throw new BadRequestException('Transfer not found');
 
    transfer.status = 'completed';
    transfer.receivedAt = new Date();
    await transfer.save();
 
    await this.assetModel.updateOne({ _id: transfer.assetId }, {
      status: 'available',
      locationId: transfer.toLocationId
    });
 
    return transfer;
  }
 
  // exit-clearance auto processing
  async handleEmployeeExit(tenantId: string, employeeId: string): Promise<void> {
    // Find all outstanding custody assignments for this employee
    const activeAssignments = await this.assignmentModel.find({
      tenantId,
      assignedToType: 'Employee',
      assignedToId: employeeId,
      status: { $in: ['pending_acknowledgement', 'active'] }
    }).exec();
 
    // Automatically flag return tasks
    for (const assignment of activeAssignments) {
      assignment.status = 'pending_acknowledgement'; // or trigger recall reminder
      assignment.returnNotes = 'Auto-recalled due to employee exit clearance.';
      await assignment.save();
      
      await this.assetModel.updateOne({ _id: assignment.assetId }, { status: 'in_transit' }); // Flag transit recovery
    }
  }
}