Purchase Order Data & Events

The Purchase Order drop-in uses the event bus to emit and listen to events for communication between drop-ins and external integrations.

Version: 1.0.0

Events reference

Event	Direction	Description
order/data	Emits	Emitted when data is available or changes.
purchase-order/error	Emits	Emitted when an error occurs.
purchase-order/placed	Emits	Emitted when an order is placed.
auth/permissions	Listens	Fired by Auth (auth) when permissions are updated.
purchase-order/data	Emits and listens	Triggered when data is available or changes.
purchase-order/refresh	Emits and listens	Emitted and consumed for internal and external communication.

Event details

The following sections provide detailed information about each event, including its direction, event payload, and usage examples.

auth/permissions (listens)

Fired by Auth (auth) when permissions are updated.

Event payload

{
  admin?: boolean;
  [key: string]: boolean | undefined;
}

Example

import { events } from '@dropins/tools/event-bus.js';

events.on('auth/permissions', (payload) => {
  console.log('auth/permissions event received:', payload);
  // Add your custom logic here
});

order/data (emits)

Emitted when data is available or changes.

Event payload

PurchaseOrderModel['quote']

See PurchaseOrderModel for full type definition.

When triggered

• When the Purchase Order Details page loads with a poRef parameter
• After purchase-order/refresh event (emitted together with purchase-order/data)

Example: Display purchase order details

import { events } from '@dropins/tools/event-bus.js';

events.on('order/data', (payload) => {
  console.log('Purchase order data for Order containers:', payload.data);

  // Initialize Order Drop-In containers with PO data
  displayPurchaseOrderDetailsInOrderContainers(payload.data);

  // Extract purchase order information
  const { number, status, items } = payload.data;
});

Usage scenarios

• Initialize Order Drop-In containers with purchase order data.
• Display purchase order details on the PO Details page.
• Sync PO data after refresh events.
• Update UI when PO data loads.

---

purchase-order/data (emits and listens)

Triggered when data is available or changes.

Event payload

PurchaseOrderModel

See PurchaseOrderModel for full type definition.

When triggered

• After loading a purchase order
• After approving a purchase order
• After rejecting a purchase order
• After canceling a purchase order
• After adding comments to a purchase order
• After updating purchase order status

Example: Example

import { events } from '@dropins/tools/event-bus.js';

events.on('purchase-order/data', (payload) => {
  const po = payload.data;
  console.log('Purchase order updated:', po.number, po.status);

  // Update the UI to reflect current status
  updatePurchaseOrderStatus(po.status);

  // Show approval flow if needed
  if (po.requiresApproval) {
    displayApprovalFlow(po.approvalFlow);
  }
});

Usage scenarios

• Refresh the purchase order details view.
• Update purchase order lists.
• Display the approval flow progress.
• Show status-specific actions.
• Update cached purchase order data.

---

purchase-order/error (emits)

Emitted when an error occurs.

Event payload

Example

import { events } from '@dropins/tools/event-bus.js';

events.on('purchase-order/error', (payload) => {
  console.log('purchase-order/error event received:', payload);
  // Add your custom logic here
});

purchase-order/placed (emits)

Emitted when an order is placed.

Event payload

PurchaseOrderModel

See PurchaseOrderModel for full type definition.

When triggered

• After successfully calling placePurchaseOrder()
• After converting a cart to a purchase order

Example 1: Basic purchase order placement

import { events } from '@dropins/tools/event-bus.js';

events.on('purchase-order/placed', (payload) => {
  const { number: purchaseOrderNumber, status } = payload.data;
  const requiresApproval = status !== "APPROVED";

  console.log(`Purchase order ${purchaseOrderNumber} placed with status: ${status}`);

  // Show appropriate confirmation message
  if (requiresApproval) {
    showMessage('Purchase order submitted for approval');
    redirectToApprovalStatus(purchaseOrderNumber);
  } else {
    showMessage('Purchase order placed successfully');
    redirectToOrderConfirmation(purchaseOrderNumber);
  }

  // Track analytics
  trackPurchaseOrderPlacement(purchaseOrderNumber, requiresApproval);
});

Example 2: Complete checkout workflow with notifications

import { events } from '@dropins/tools/event-bus.js';
import { placePurchaseOrder } from '@dropins/storefront-purchase-order/api.js';

async function completePurchaseOrderCheckout(cartId) {
  try {
    // Show checkout processing
    showCheckoutModal('Processing your purchase order...');

    // Place the purchase order
    await placePurchaseOrder(cartId);

    // Listen for successful placement
    events.once('purchase-order/placed', async (payload) => {
      const { number: purchaseOrderNumber, status } = payload.data;
      const requiresApproval = status !== "APPROVED";

      // Close processing modal
      hideCheckoutModal();

      // Clear cart UI
      clearCartDisplay();

      // Show success modal with details
      if (requiresApproval) {
        showSuccessModal({
          title: 'Purchase Order Submitted',
          message: `Your purchase order #${purchaseOrderNumber} has been submitted for approval.`,
          details: [
            `Status: Pending Approval`,
            `You will be notified when it's reviewed.`,
            `Track your order in the Purchase Orders section.`
          ],
          primaryAction: {
            label: 'View Purchase Order',
            onClick: () => window.location.href = `/purchase-orders/${purchaseOrderNumber}`
          },
          secondaryAction: {
            label: 'Continue Shopping',
            onClick: () => window.location.href = '/products'
          }
        });

        // Send notification email
        await sendNotification({
          type: 'purchase-order-submitted',
          purchaseOrderNumber,
          approvers: payload.data.approvers
        });

      } else {
        showSuccessModal({
          title: 'Order Placed Successfully',
          message: `Your purchase order #${purchaseOrderNumber} has been placed.`,
          details: [
            `Status: ${status}`,
            `You will receive a confirmation email shortly.`
          ],
          primaryAction: {
            label: 'View Order',
            onClick: () => window.location.href = `/orders/${purchaseOrderNumber}`
          }
        });
      }

      // Track conversion
      trackConversion({
        type: 'purchase-order',
        orderNumber: purchaseOrderNumber,
        requiresApproval,
        value: payload.data.total,
        currency: payload.data.currency
      });

      // Update user's PO history count
      incrementPurchaseOrderCount();
    });

  } catch (error) {
    hideCheckoutModal();
    showErrorModal({
      title: 'Failed to Place Purchase Order',
      message: error.message || 'An error occurred while processing your order.',
      action: {
        label: 'Try Again',
        onClick: () => completePurchaseOrderCheckout(cartId)
      }
    });
    console.error('Purchase order placement error:', error);
  }
}

Example 3: Multi-approval workflow dashboard

import { events } from '@dropins/tools/event-bus.js';

// Dashboard for tracking all purchase orders
class PurchaseOrderDashboard {
  constructor() {
    this.pendingOrders = [];
    this.completedOrders = [];

    // Listen for new purchase orders
    events.on('purchase-order/placed', this.handleNewOrder.bind(this));
    events.on('purchase-order/data', this.handleOrderUpdate.bind(this));

    this.init();
  }

  async init() {
    await this.loadExistingOrders();
    this.render();
  }

  handleNewOrder(payload) {
    const { number: purchaseOrderNumber, status } = payload.data;
    const requiresApproval = status !== "APPROVED";

    const order = {
      number: purchaseOrderNumber,
      status: status,
      requiresApproval,
      placedAt: new Date(),
      ...payload.data
    };

    if (requiresApproval) {
      this.pendingOrders.unshift(order);

      // Show real-time notification
      this.showNotificationBanner({
        type: 'info',
        message: `New PO #${purchaseOrderNumber} awaiting approval`,
        action: () => this.viewOrder(purchaseOrderNumber)
      });

      // Play notification sound
      this.playNotificationSound();

      // Update pending count badge
      this.updatePendingBadge(this.pendingOrders.length);

    } else {
      this.completedOrders.unshift(order);
    }

    // Refresh dashboard display
    this.render();
  }

  handleOrderUpdate(payload) {
    const updatedOrder = payload.data;

    // Remove from pending if approved/rejected
    if (['approved', 'rejected', 'canceled'].includes(updatedOrder.status)) {
      this.pendingOrders = this.pendingOrders.filter(
        o => o.number !== updatedOrder.number
      );
      this.completedOrders.unshift(updatedOrder);
      this.updatePendingBadge(this.pendingOrders.length);
    }

    this.render();
  }

  render() {
    document.querySelector('#pending-orders').innerHTML =
      this.renderOrderList(this.pendingOrders, 'pending');
    document.querySelector('#completed-orders').innerHTML =
      this.renderOrderList(this.completedOrders, 'completed');
  }

  renderOrderList(orders, type) {
    if (orders.length === 0) {
      return `<div class="empty-state">No ${type} purchase orders</div>`;
    }

    return orders.map(order => `
      <div class="order-card" data-order="${order.number}">
        <div class="order-header">
          <span class="order-number">#${order.number}</span>
          <span class="order-status status-${order.status}">${order.status}</span>
        </div>
        <div class="order-details">
          <span>Total: ${order.total}</span>
          <span>Date: ${formatDate(order.placedAt)}</span>
        </div>
      </div>
    `).join('');
  }

  showNotificationBanner(options) {
    // Show slide-in notification
    const banner = document.createElement('div');
    banner.className = `notification-banner notification-${options.type}`;
    banner.innerHTML = `
      <span>${options.message}</span>
      <button onclick="this.parentElement.remove()">×</button>
    `;
    if (options.action) {
      banner.onclick = options.action;
    }
    document.body.appendChild(banner);
    setTimeout(() => banner.remove(), 5000);
  }

  playNotificationSound() {
    const audio = new Audio('/sounds/notification.mp3');
    audio.play().catch(() => {});
  }

  updatePendingBadge(count) {
    const badge = document.querySelector('.pending-count-badge');
    if (badge) {
      badge.textContent = count;
      badge.style.display = count > 0 ? 'block' : 'none';
    }
  }

  viewOrder(orderNumber) {
    window.location.href = `/purchase-orders/${orderNumber}`;
  }

  async loadExistingOrders() {
    // Load existing orders from API
    const { pendingOrders, completedOrders } = await fetchPurchaseOrders();
    this.pendingOrders = pendingOrders;
    this.completedOrders = completedOrders;
  }
}

// Initialize dashboard
const dashboard = new PurchaseOrderDashboard();

Usage scenarios

• Display success confirmation with order details.
• Redirect to the success page (approval or direct order).
• Clear shopping cart after successful placement.
• Send email notifications to approvers.
• Track analytics and conversion events.
• Update purchase order history and counts.
• Show real-time notifications for new orders.
• Update dashboard widgets and badges.
• Trigger approval workflow notifications.
• Log purchase order creation for audit.
• Update budget tracking systems.
• Sync with ERP/accounting systems.

---

purchase-order/refresh (emits and listens)

Emitted and consumed for internal and external communication.

Event payload

Boolean

When triggered

• After approval rule changes
• After permission updates
• On user request (manual refresh)
• After significant state changes

Example: Example

import { events } from '@dropins/tools/event-bus.js';

// Emit refresh event
events.emit('purchase-order/refresh', {
  purchaseOrderId: 'PO123456'
});

// Listen for refresh requests
events.on('purchase-order/refresh', async (payload) => {
  if (payload.data.purchaseOrderId) {
    // Refresh specific purchase order
    await refreshPurchaseOrder(payload.data.purchaseOrderId);
  } else {
    // Refresh all purchase orders
    await refreshAllPurchaseOrders();
  }
});

Usage scenarios

• Force reload after external updates.
• Implement pull-to-refresh functionality.
• Sync data after background changes.
• Refresh after approval rule modifications.

---

Listening to events

All Purchase Order events are emitted through the centralized event bus. Subscribe to events using the events.on() method:

import { events } from '@dropins/tools/event-bus.js';

// Listen to purchase order lifecycle events
events.on('purchase-order/placed', handlePurchaseOrderPlaced);
events.on('purchase-order/data', handlePurchaseOrderData);
events.on('purchase-order/refresh', handleRefreshRequest);

// Remove listeners when done
events.off('purchase-order/placed', handlePurchaseOrderPlaced);

Tip

Event listeners remain active until explicitly removed with events.off(). Clean up listeners when components unmount to prevent memory leaks.

Note

Purchase order events integrate with the standard Order drop-in events. A purchase order that completes the approval process will emit both purchase-order/data and order/data events.

Related documentation

• Functions - API functions that emit these events
• Containers - UI components that respond to events
• Event bus documentation - Learn more about the event system

Data Models

The following data models are used in event payloads for this drop-in.

PurchaseOrderModel

Used in: order/data, purchase-order/data, purchase-order/placed.

interface PurchaseOrderModel {
  typename: string;
  uid: string;
  number: string;
  status: string;
  availableActions: string[];
  approvalFlow:
    | {
        ruleName: string;
        events: Array<{
          message: string;
          name: string;
          role: string;
          status: string;
          updatedAt: string;
        }>;
      }[]
    | [];
  comments?: Array<{
    uid: string;
    createdAt: string;
    author: {
      firstname: string;
      lastname: string;
      email: string;
    };
    text: string;
  }>;
  createdAt: string;
  updatedAt: string;
  createdBy: {
    firstname: string;
    lastname: string;
    email: string;
  };
  historyLog?: Array<{
    activity: string;
    createdAt: string;
    message: string;
    uid: string;
  }>;
  quote: QuoteProps | null;
  order: {
    orderNumber: string;
    id: string;
  };
}