fix customer code calculate taxes (#922)

* fix: 🐛 calculate taxes customerCode

* build: 👷 changeset

* refactor: ♻️ address feedback

* feat: ✨ add migration

* Empty-Commit

.changeset/fifty-radios-beam.md

@@ -0,0 +1,5 @@
+---
+"saleor-app-taxes": patch
+---
+
+Fixed the issue when user id was not available during tax calculation. Now, to identify the user during tax calculation, we use the user email.

apps/taxes/graphql/fragments/CalculateTaxesEvent.graphql

@@ -10,11 +10,5 @@ fragment CalculateTaxesEvent on Event {
         value
       }
     }
-    issuingPrincipal {
-      __typename
-      ... on User {
-        id
-      }
-    }
   }
 }

apps/taxes/graphql/fragments/TaxBase.graphql

@@ -60,11 +60,14 @@ fragment TaxBase on TaxableObject {
     ...TaxBaseLine
   }
   sourceObject {
+    __typename
     ... on Checkout {
       avataxEntityCode: metafield(key: "avataxEntityCode")
+      email
     }
     ... on Order {
       avataxEntityCode: metafield(key: "avataxEntityCode")
+      userEmail
     }
   }
 }

apps/taxes/scripts/migrations/1.15-taxes-migration.ts

@@ -0,0 +1,15 @@
+/* eslint-disable multiline-comment-style */
+import { checkoutCalculateTaxesSyncWebhook } from "../../src/pages/api/webhooks/checkout-calculate-taxes";
+import { orderCalculateTaxesSyncWebhook } from "../../src/pages/api/webhooks/order-calculate-taxes";
+import { AppWebhookMigrator } from "./app-webhook-migrator";
+
+/**
+ * Contains the migration logic for the Taxes App. In the 1st step, it is expected to only write, not delete. The cleanup will be done in the 2nd step.
+ * @param webhookMigrator - The AppWebhookMigrator instance.
+ */
+export async function migrateTaxes(webhookMigrator: AppWebhookMigrator) {
+  // Migration plan:
+  //  1. Update subscriptionQuery of all calculateTaxes webhooks
+  webhookMigrator.updateWebhookQueryByHandler(orderCalculateTaxesSyncWebhook);
+  webhookMigrator.updateWebhookQueryByHandler(checkoutCalculateTaxesSyncWebhook);
+}

apps/taxes/scripts/migrations/app-webhook-migrator.ts

@@ -8,6 +8,8 @@ type AppWebhookMigratorOptions = {
   mode: "report" | "migrate";
 };
 
+type AppWebhookHandler = SaleorSyncWebhook | SaleorAsyncWebhook;
+
 export class AppWebhookMigrator {
   private appWebhookRepository: AppWebhookRepository;
   private appId: string;
@@ -33,7 +35,7 @@ export class AppWebhookMigrator {
     this.mode = mode;
   }
 
-  private registerWebhookFromHandler(webhookHandler: SaleorSyncWebhook | SaleorAsyncWebhook) {
+  private registerWebhookFromHandler(webhookHandler: AppWebhookHandler) {
     const manifest = webhookHandler.getWebhookManifest(this.apiUrl);
 
     if (!manifest.query) {
@@ -44,6 +46,9 @@ export class AppWebhookMigrator {
       throw new Error("Webhook name is required");
     }
 
+    console.log(`⏳ Webhook ${manifest.name} will be registered`);
+
+    if (this.mode === "migrate") {
       return this.appWebhookRepository.create({
         appId: this.appId,
         name: manifest.name,
@@ -54,6 +59,7 @@ export class AppWebhookMigrator {
         isActive: manifest.isActive ?? true,
       });
     }
+  }
 
   private async deleteWebhookById(webhookId: string) {
     console.log(`⏳ Webhook ${webhookId} will be deleted`);
@@ -119,6 +125,28 @@ export class AppWebhookMigrator {
     await this.deleteWebhookById(webhook.id);
   }
 
+  async updateWebhookQueryByHandler(webhookHandler: AppWebhookHandler) {
+    const webhooks = await this.getAppWebhooks();
+
+    const manifest = webhookHandler.getWebhookManifest(this.apiUrl);
+    const webhookName = manifest.name;
+
+    const webhook = webhooks.find((webhook) => webhook.name === webhookName);
+
+    if (!webhook) {
+      console.log(`🚧 Webhook ${webhookName} not found`);
+
+      return;
+    }
+
+    console.log(`⏳ Webhook ${webhookName} query will be updated`);
+
+    if (this.mode === "migrate") {
+      await this.appWebhookRepository.update(webhook.id, { query: manifest.query });
+      console.log(`✅ Webhook ${webhookName} query updated`);
+    }
+  }
+
   /**
    * Registers a webhook if it doesn't exist based on a handler.
    * @param webhookHandler - The handler of the webhook we want to register.

apps/taxes/scripts/migrations/app-webhook-repository.ts

@@ -14,6 +14,10 @@ import {
   EnableWebhookMutationVariables,
   FetchAppWebhooksDocument,
   FetchAppWebhooksQuery,
+  UpdateAppWebhookDocument,
+  UpdateAppWebhookMutation,
+  UpdateAppWebhookMutationVariables,
+  WebhookUpdateInput,
 } from "../../generated/graphql";
 
 gql`
@@ -55,6 +59,16 @@ gql`
   }
 `;
 
+gql`
+  mutation UpdateAppWebhook($id: ID!, $input: WebhookUpdateInput!) {
+    webhookUpdate(id: $id, input: $input) {
+      webhook {
+        id
+      }
+    }
+  }
+`;
+
 gql`
   mutation DeleteAppWebhook($id: ID!) {
     webhookDelete(id: $id) {
@@ -168,4 +182,21 @@ export class AppWebhookRepository {
 
     return data?.webhookDelete?.webhook?.id;
   }
+
+  async update(id: string, input: WebhookUpdateInput) {
+    const { error, data } = await this.client
+      .mutation<UpdateAppWebhookMutation>(UpdateAppWebhookDocument, {
+        id,
+        input,
+      } as UpdateAppWebhookMutationVariables)
+      .toPromise();
+
+    if (error) {
+      console.log(`❌ Was not able to update webhook ${id}`, error.message);
+
+      throw error;
+    }
+
+    return data?.webhookUpdate?.webhook?.id;
+  }
 }

apps/taxes/scripts/migrations/run-migration.ts

@@ -3,7 +3,7 @@
 import * as dotenv from "dotenv";
 import { createAppWebhookMigrator } from "./app-webhook-migrator";
 import { fetchCloudAplEnvs, verifyRequiredEnvs } from "./migration-utils";
-import { migrateTaxes } from "./1.13-taxes-migration";
+import { migrateTaxes } from "./1.15-taxes-migration";
 
 dotenv.config();
 

apps/taxes/scripts/migrations/run-report.ts

@@ -3,7 +3,7 @@
 import * as dotenv from "dotenv";
 import { createAppWebhookMigrator } from "./app-webhook-migrator";
 import { fetchCloudAplEnvs, verifyRequiredEnvs } from "./migration-utils";
-import { migrateTaxes } from "./1.13-taxes-migration";
+import { migrateTaxes } from "./1.15-taxes-migration";
 
 dotenv.config();
 

apps/taxes/src/modules/avatax/calculate-taxes/avatax-calculate-taxes-mock-generator.ts

@@ -107,6 +107,8 @@ const defaultTaxBase: TaxBase = {
   ],
   sourceObject: {
     avataxEntityCode: null,
+    __typename: "Checkout",
+    email: "test@saleor.io",
   },
 };
 

apps/taxes/src/modules/avatax/calculate-taxes/avatax-calculate-taxes-payload-transformer.test.ts

@@ -66,8 +66,10 @@ describe("AvataxCalculateTaxesPayloadTransformer", () => {
 
     expect(payload.model.discount).toEqual(0);
   });
-  it("when no issuingPrincipal.id, throws an error", async () => {
-    const taxBaseMock = mockGenerator.generateTaxBase();
+  it("when no email in sourceObject, throws an error", async () => {
+    const taxBaseMock = mockGenerator.generateTaxBase({
+      sourceObject: { email: undefined, __typename: "Checkout" },
+    });
     const matchesMock = mockGenerator.generateTaxCodeMatches();
 
     const payloadMock = {

apps/taxes/src/modules/avatax/calculate-taxes/avatax-calculate-taxes-payload-transformer.ts

@@ -21,6 +21,19 @@ export class AvataxCalculateTaxesPayloadTransformer {
     return DocumentType.SalesOrder;
   }
 
+  // During the checkout process, it appears the customer id is not always available. We can use the email address instead.
+  private resolveCustomerCode(payload: CalculateTaxesPayload): string {
+    if (payload.taxBase.sourceObject.__typename === "Checkout") {
+      return taxProviderUtils.resolveStringOrThrow(payload.taxBase.sourceObject.email);
+    }
+
+    if (payload.taxBase.sourceObject.__typename === "Order") {
+      return taxProviderUtils.resolveStringOrThrow(payload.taxBase.sourceObject.userEmail);
+    }
+
+    throw new Error("Cannot resolve customer code");
+  }
+
   async transform(
     payload: CalculateTaxesPayload,
     avataxConfig: AvataxConfig,
@@ -33,9 +46,7 @@ export class AvataxCalculateTaxesPayloadTransformer {
       payload.taxBase.sourceObject.avataxEntityCode,
     );
 
-    const customerCode = taxProviderUtils.resolveStringOrThrow(
-      payload.issuingPrincipal?.__typename === "User" ? payload.issuingPrincipal.id : undefined,
-    );
+    const customerCode = this.resolveCustomerCode(payload);
 
     return {
       model: {

apps/taxes/src/modules/taxjar/calculate-taxes/taxjar-calculate-taxes-mock-generator.ts

@@ -96,6 +96,8 @@ const taxIncludedTaxBase: TaxBase = {
   ],
   sourceObject: {
     avataxEntityCode: null,
+    __typename: "Checkout",
+    email: "test@saleor.io",
   },
 };
 
@@ -191,6 +193,8 @@ const taxExcludedTaxBase: TaxBase = {
   ],
   sourceObject: {
     avataxEntityCode: null,
+    __typename: "Checkout",
+    email: "test@saleor.io",
   },
 };