Add our scalars to the package for other developers (#69)

* Add our scalars to the package for other developers

* Update .changeset/swift-olives-beam.md

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update .changeset/swift-olives-beam.md

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update apps/nextjs/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update apps/nextjs/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update apps/nextjs/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/README.md

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/README.md

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/codegen.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

* Update packages/react/src/codegen.helpers.ts

Co-authored-by: Ren Chaturvedi <[email protected]>

Co-authored-by: Ren Chaturvedi <[email protected]>

Author: frehner

Diff for: .changeset/swift-olives-beam.md

@@ -0,0 +1,26 @@
+---
+'@shopify/hydrogen-react': patch
+---
+
+Provide a mapping of Storefront API's custom scalars to their actual types, for use with GraphQL CodeGen.
+
+For example:
+
+```ts
+import {storefrontApiCustomScalars} from '@shopify/hydrogen-react';
+
+const config: CodegenConfig = {
+  // Use the schema that's bundled with @shopify/hydrogen-react
+  schema: './node_modules/@shopify/hydrogen-react/storefront.schema.json',
+  generates: {
+    './gql/': {
+      preset: 'client',
+      plugins: [],
+      config: {
+        // Use the custom scalar definitions that @shopify/hydrogen-react provides to improve the custom scalar types
+        scalars: storefrontApiCustomScalars,
+      },
+    },
+  },
+};
+```

Diff for: apps/nextjs/codegen.ts

@@ -1,16 +1,28 @@
 import type {CodegenConfig} from '@graphql-codegen/cli';
+// Due to issues with TurboRepo and dev dependencies, we can't use this in the monorepo. But if we could, then it would look like this import, and then used below in "scalars"
+// import {storefrontApiCustomScalars} from '@shopify/hydrogen-react';
 
 const config: CodegenConfig = {
   overwrite: true,
-  // a normal app would only need `./node_modules/...` but we're in a monorepo
+  // A normal app would only need `./node_modules/...` but we're in a monorepo
   schema: '../../node_modules/@shopify/hydrogen-react/storefront.schema.json',
   documents: 'pages/**/*.tsx',
-  // @TODO a chance here to provide the settings we use to generate our Types for the schema here as well,
-  // so that the Custom Scalar definitions we have in hydrogen-ui can be used here as well.
   generates: {
     './gql/': {
       preset: 'client',
       plugins: [],
+      config: {
+        // scalars: storefrontApiCustomScalars,
+        scalars: {
+          // Because of the limitations outlined above, these need to be kept in sync with the original definitions in the @shopify/hydrogen-react repo!
+          DateTime: 'string',
+          Decimal: 'string',
+          HTML: 'string',
+          URL: 'string',
+          Color: 'string',
+          UnsignedInt64: 'string',
+        },
+      },
     },
   },
 };

Diff for: apps/nextjs/gql/graphql.ts

@@ -18,29 +18,29 @@ export type Scalars = {
    * For example, "#6A8D48".
    *
    */
-  Color: any;
+  Color: string;
   /**
    * Represents an [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601)-encoded date and time string.
    * For example, 3:50 pm on September 7, 2019 in the time zone of UTC (Coordinated Universal Time) is
    * represented as `"2019-09-07T15:50:00Z`".
    *
    */
-  DateTime: any;
+  DateTime: string;
   /**
    * A signed decimal number, which supports arbitrary precision and is serialized as a string.
    *
    * Example values: `"29.99"`, `"29.999"`.
    *
    */
-  Decimal: any;
+  Decimal: string;
   /**
    * A string containing HTML code. Refer to the [HTML spec](https://html.spec.whatwg.org/#elements-3) for a
    * complete list of HTML elements.
    *
    * Example value: `"<p>Grey cotton knit sweater.</p>"`.
    *
    */
-  HTML: any;
+  HTML: string;
   /**
    * A [JSON](https://www.json.org/json-en.html) object.
    *
@@ -66,14 +66,14 @@ export type Scalars = {
    * (`johns-apparel.myshopify.com`).
    *
    */
-  URL: any;
+  URL: string;
   /**
    * An unsigned 64-bit integer. Represents whole numeric values between 0 and 2^64 - 1 encoded as a string of base-10 digits.
    *
    * Example value: `"50"`.
    *
    */
-  UnsignedInt64: any;
+  UnsignedInt64: string;
 };
 
 /**
@@ -6845,7 +6845,7 @@ export enum WeightUnit {
 export type IndexQueryQueryVariables = Exact<{ [key: string]: never; }>;
 
 
-export type IndexQueryQuery = { __typename?: 'QueryRoot', shop: { __typename?: 'Shop', name: string }, products: { __typename?: 'ProductConnection', nodes: Array<{ __typename?: 'Product', id: string, title: string, publishedAt: any, handle: string, variants: { __typename?: 'ProductVariantConnection', nodes: Array<{ __typename?: 'ProductVariant', id: string, image?: { __typename?: 'Image', url: any, altText?: string | null, width?: number | null, height?: number | null } | null }> } }> } };
+export type IndexQueryQuery = { __typename?: 'QueryRoot', shop: { __typename?: 'Shop', name: string }, products: { __typename?: 'ProductConnection', nodes: Array<{ __typename?: 'Product', id: string, title: string, publishedAt: string, handle: string, variants: { __typename?: 'ProductVariantConnection', nodes: Array<{ __typename?: 'ProductVariant', id: string, image?: { __typename?: 'Image', url: string, altText?: string | null, width?: number | null, height?: number | null } | null }> } }> } };
 
 
 export const IndexQueryDocument = {"kind":"Document","definitions":[{"kind":"OperationDefinition","operation":"query","name":{"kind":"Name","value":"IndexQuery"},"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"shop"},"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"name"}}]}},{"kind":"Field","name":{"kind":"Name","value":"products"},"arguments":[{"kind":"Argument","name":{"kind":"Name","value":"first"},"value":{"kind":"IntValue","value":"1"}}],"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"nodes"},"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"id"}},{"kind":"Field","name":{"kind":"Name","value":"title"}},{"kind":"Field","name":{"kind":"Name","value":"publishedAt"}},{"kind":"Field","name":{"kind":"Name","value":"handle"}},{"kind":"Field","name":{"kind":"Name","value":"variants"},"arguments":[{"kind":"Argument","name":{"kind":"Name","value":"first"},"value":{"kind":"IntValue","value":"1"}}],"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"nodes"},"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"id"}},{"kind":"Field","name":{"kind":"Name","value":"image"},"selectionSet":{"kind":"SelectionSet","selections":[{"kind":"Field","name":{"kind":"Name","value":"url"}},{"kind":"Field","name":{"kind":"Name","value":"altText"}},{"kind":"Field","name":{"kind":"Name","value":"width"}},{"kind":"Field","name":{"kind":"Name","value":"height"}}]}}]}}]}}]}}]}}]}}]} as unknown as DocumentNode<IndexQueryQuery, IndexQueryQueryVariables>;

Diff for: packages/react/README.md

@@ -154,6 +154,29 @@ If you're having trouble getting it to work, then consult our [troubleshooting s
 
 Improve your development experience by adding strong typing to Storefront API responses. The following are some options for doing this.
 
+## GraphQL CodeGen
+
+To use GraphQL CodeGen, follow [their guide](https://the-guild.dev/graphql/codegen/docs/getting-started/installation) to get started. Then, when you have a `codegen.ts` file, you can modify the following lines in the codegen object to improve the CodgeGen experience:
+
+```ts
+import {storefrontApiCustomScalars} from '@shopify/hydrogen-react';
+
+const config: CodegenConfig = {
+  // Use the schema that's bundled with @shopify/hydrogen-react
+  schema: './node_modules/@shopify/hydrogen-react/storefront.schema.json',
+  generates: {
+    './gql/': {
+      preset: 'client',
+      plugins: [],
+      config: {
+        // Use the custom scalar definitions that @shopify/hydrogen-react provides to improve the types
+        scalars: storefrontApiCustomScalars,
+      },
+    },
+  },
+};
+```
+
 ### Use the `StorefrontApiResponseError` and `StorefrontApiResponseOk` helpers
 
 The following is an example:

Diff for: packages/react/codegen.ts

@@ -0,0 +1,58 @@
+import {CodegenConfig} from '@graphql-codegen/cli';
+// Because this file is processed only in TypeScript, we can make one exception for not using an extension here.
+// eslint-disable-next-line import/extensions
+import {storefrontApiCustomScalars} from './src/codegen.helpers';
+
+const config: CodegenConfig = {
+  overwrite: true,
+  schema: {
+    'https://hydrogen-preview.myshopify.com/api/2022-10/graphql.json': {
+      headers: {
+        'X-Shopify-Storefront-Access-Token': '3b580e70970c4528da70c98e097c2fa0',
+        'content-type': 'application/json',
+      },
+    },
+  },
+  generates: {
+    // The generated base types
+    'src/storefront-api-types.d.ts': {
+      plugins: [
+        {
+          add: {
+            content: `
+              /** 
+               * THIS FILE IS AUTO-GENERATED, DO NOT EDIT
+               * Based on Storefront API 2022-10
+               * If changes need to happen to the types defined in this file, then generally the Storefront API needs to update. After it's updated, you can run \`yarn graphql-types\`.
+               * Except custom Scalars, which are defined in the \`codegen.ts\` file
+               */
+              /* eslint-disable */`,
+          },
+        },
+        {
+          typescript: {
+            useTypeImports: true,
+            // If a default type for a scalar isn't set, then instead of 'any' we set to 'unknown' for better type safety.
+            defaultScalarType: 'unknown',
+            useImplementingTypes: true,
+            enumsAsTypes: true,
+            // Define how the Storefront API's custom scalars map to TypeScript types
+            scalars: storefrontApiCustomScalars,
+          },
+        },
+      ],
+    },
+    // The schema file, which is the local representation of the GraphQL endpoint
+    './storefront.schema.json': {
+      plugins: [
+        {
+          introspection: {
+            minify: true,
+          },
+        },
+      ],
+    },
+  },
+};
+
+export default config;

Diff for: packages/react/codegen.yml

@@ -91,7 +91,7 @@
     "build:tsc:es": "tsc --emitDeclarationOnly --project tsconfig.typeoutput.json",
     "copy-storefront-types": "cpy ./src/storefront-api-types.d.ts ./dist/types/ --flat",
     "format": "prettier --write \"src/**/*\"",
-    "graphql-types": "graphql-codegen --config codegen.yml && yarn format",
+    "graphql-types": "graphql-codegen --config codegen.ts && yarn format",
     "prepack": "yarn build",
     "test": "vitest",
     "test:ci": "vitest run --coverage",

Diff for: packages/react/package.json

@@ -4,7 +4,7 @@ import {useCart} from './CartProvider.js';
 import {useProduct} from './ProductProvider.js';
 import {BaseButton, BaseButtonProps} from './BaseButton.js';
 
-interface AddToCartButtonProps {
+export interface AddToCartButtonProps {
   /** An array of cart line attributes that belong to the item being added to the cart. */
   attributes?: {
     key: string;

Diff for: packages/react/src/AddToCartButton.tsx

@@ -0,0 +1,10 @@
+/** Meant to be used with GraphQL CodeGen to type the Storefront API's custom scalars correctly */
+export const storefrontApiCustomScalars = {
+  // Keep in sync with the definitions in the app/nextjs/codegen.ts!
+  DateTime: 'string',
+  Decimal: 'string',
+  HTML: 'string',
+  URL: 'string',
+  Color: 'string',
+  UnsignedInt64: 'string',
+};

Diff for: packages/react/src/codegen.helpers.ts

@@ -9,6 +9,7 @@ export type {
 } from './cart-types.js';
 export {CartCheckoutButton} from './CartCheckoutButton.js';
 export {CartProvider, useCart} from './CartProvider.js';
+export {storefrontApiCustomScalars} from './codegen.helpers.js';
 export {ExternalVideo} from './ExternalVideo.js';
 export {flattenConnection} from './flatten-connection.js';
 export {Image} from './Image.js';

Diff for: packages/react/src/index.ts

@@ -2,7 +2,7 @@
  * THIS FILE IS AUTO-GENERATED, DO NOT EDIT
  * Based on Storefront API 2022-10
  * If changes need to happen to the types defined in this file, then generally the Storefront API needs to update, and then you can run `yarn graphql-types`
- * Except custom Scalars, which are defined in the `codegen.yml` file
+ * Except custom Scalars, which are defined in the `codegen.ts` file
  */
 /* eslint-disable */
 export type Maybe<T> = T | null;