feat: Add offer price endpoint

src/booking/Offers/OfferTypes.ts

@@ -707,3 +707,76 @@ export interface UpdateOffer {
   family_name: string
   age: number
 }
+
+export type OfferIntendedPaymentMethod =
+  | {
+      /**
+       * The type of payment method intended to use
+       */
+      type: 'card'
+
+      /**
+       * The ID of the card intended to pay with
+       */
+      card_id: string
+    }
+  | {
+      /**
+       * The type of payment method intended to use
+       */
+      type: 'airline_credit'
+
+      /**
+       * The ID of the airline credit intended to pay with
+       */
+      airline_credit_id: string
+    }
+
+export interface OfferIntendedService {
+  /**
+   * The ID of the service to pay for
+   */
+  id: string
+
+  /**
+   * The quantity of the service ID to pay for
+   */
+  quantity: number
+}
+
+export interface GetOfferPricedParams {
+  /**
+   * The ID of the offer
+   */
+  offerId: string
+
+  /**
+   * The payment methods intended to use to pay for the offer
+   */
+  intended_payment_methods: OfferIntendedPaymentMethod[]
+
+  /**
+   * The services intended to book along with the offer
+   */
+  intended_services: OfferIntendedService[]
+}
+
+/**
+ * Represents a priced offer, including the charge and surcharge amounts for the intended payment methods and services
+ */
+export interface OfferPriced extends Offer {
+  /**
+   * The payment methods intended to use to pay for the offer, along with the charge and surcharge amounts
+   */
+  intended_payment_methods: (OfferIntendedPaymentMethod & {
+    charge_currency: string
+    charge_amount: string
+    surcharge_amount: string
+    surcharge_currency: string
+  })[]
+
+  /**
+   * The services intended to book along with the offer
+   */
+  intended_services: OfferIntendedService[]
+}

src/booking/Offers/Offers.spec.ts

@@ -1,7 +1,7 @@
 import nock from 'nock'
 import { Client } from '../../Client'
 import { Duffel } from '../../index'
-import { mockOffer, mockUpdatedOffer } from './mockOffer'
+import { mockOffer, mockOfferPriced, mockUpdatedOffer } from './mockOffer'
 import { Offers } from './Offers'
 
 const duffel = new Duffel({ token: 'mockToken' })
@@ -109,4 +109,30 @@ describe('offers', () => {
       1,
     )
   })
+
+  test('should get offer price', async () => {
+    nock(/(.*)/)
+      .post(`/air/offers/${mockOffer.id}/actions/price`)
+      .reply(200, { data: mockOfferPriced })
+
+    const response = await new Offers(
+      new Client({ token: 'mockToken' }),
+    ).getPriced({
+      offerId: mockOffer.id,
+      intended_payment_methods: [
+        {
+          type: 'card',
+          card_id: 'card_00009htYpSCXrwaB9DnUm0',
+        },
+      ],
+      intended_services: [
+        {
+          id: 'ase_00009UhD4ongolulWd9123',
+          quantity: 1,
+        },
+      ],
+    })
+
+    expect(response.data).toStrictEqual(mockOfferPriced)
+  })
 })

src/booking/Offers/Offers.ts

@@ -2,8 +2,10 @@ import { Client } from '../../Client'
 import { Resource } from '../../Resource'
 import {
   DuffelResponse,
+  GetOfferPricedParams,
   ListOffersParams,
   Offer,
+  OfferPriced,
   LoyaltyProgrammeAccounts,
   UpdateOffer,
 } from '../../types'
@@ -97,4 +99,19 @@ export class Offers extends Resource {
       path: `${this.path}/${offerId}/passengers/${passengerId}`,
       ...(params && { data: params }),
     })
+
+  /**
+   * Price the offer with intended payment methods and intended services. This will return the total amount that will be charged to the customer, including any applicable surcharges.
+   * @param {Object.<GetOfferPricedParams>} params - The intended payment methods and services of the offer
+   * @param {string} params.offerId - Duffel's unique identifier for the offer
+   */
+  public getPriced = async ({
+    offerId,
+    ...params
+  }: GetOfferPricedParams): Promise<DuffelResponse<OfferPriced>> =>
+    this.request({
+      method: 'POST',
+      path: `${this.path}/${offerId}/actions/price`,
+      data: params,
+    })
 }

src/booking/Offers/mockOffer.ts

@@ -1,4 +1,4 @@
-import { Offer } from '../../types'
+import { Offer, OfferPriced } from '../../types'
 
 export const mockOffer: Offer = {
   updated_at: '2020-01-17T10:12:14.545Z',
@@ -275,3 +275,23 @@ export const mockUpdatedOffer = {
   family_name: 'Earhart',
   age: 14,
 }
+
+export const mockOfferPriced: OfferPriced = {
+  ...mockOffer,
+  intended_payment_methods: [
+    {
+      type: 'card',
+      card_id: 'card_00009htYpSCXrwaB9DnUm0',
+      surcharge_amount: '2.50',
+      surcharge_currency: 'GBP',
+      charge_amount: '41.81',
+      charge_currency: 'GBP',
+    },
+  ],
+  intended_services: [
+    {
+      id: 'ase_00009UhD4ongolulWd9123',
+      quantity: 1,
+    },
+  ],
+}