New provideApollo() and provideNamedApollo()

Those two providers make it simpler to provide Apollo with options and
flags to the application.

Token injections, `APOLLO_OPTIONS`, `APOLLO_NAMED_OPTIONS` and
`APOLLO_FLAGS` are not needed anymore in application code. Though they
might still be used for custom providing techniques.

`ApolloModule` is deprecated because it brings no value. Especially with
the introduction of the two providing functions.

Author: PowerKiKi

.changeset/green-eels-deny.md

@@ -0,0 +1,5 @@
+---
+'apollo-angular': minor
+---
+
+New `provideApollo()` and `provideNamedApollo()`

packages/apollo-angular/http/tests/http-link.spec.ts

@@ -4,7 +4,7 @@ import { HttpClientModule, HttpHeaders } from '@angular/common/http';
 import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
 import { TestBed } from '@angular/core/testing';
 import { ApolloLink, execute, gql, InMemoryCache } from '@apollo/client/core';
-import { Apollo, ApolloModule } from '../../src';
+import { Apollo } from '../../src';
 import { HttpLink } from '../src/http-link';
 
 const noop = () => {
@@ -17,8 +17,8 @@ describe('HttpLink', () => {
 
   beforeEach(() => {
     TestBed.configureTestingModule({
-      imports: [ApolloModule, HttpClientModule, HttpClientTestingModule],
-      providers: [HttpLink],
+      imports: [HttpClientModule, HttpClientTestingModule],
+      providers: [HttpLink, Apollo],
     });
     httpLink = TestBed.inject(HttpLink);
     httpBackend = TestBed.inject(HttpTestingController);

packages/apollo-angular/schematics/install/files/standalone/graphql.provider.ts

@@ -194,7 +194,16 @@ function importSetup(options: Schema): Rule {
     const mainPath = await getMainFilePath(host, options.project);
     if (isStandaloneApp(host, mainPath)) {
       return addRootProvider(options.project, ({ code, external }) => {
-        return code`${external('graphqlProvider', './graphql.provider')}`;
+        return code`${external('provideApollo', 'apollo-angular')}(() => {
+      const httpLink = inject(${external('HttpLink', 'apollo-angular/http')});
+
+      return {
+        link: httpLink.create({
+          uri: '<%= endpoint %>',
+        }),
+        cache: new ${external('InMemoryCache', '@apollo/client/core')}(),
+      };
+    })`;
       });
     } else {
       await addModuleImportToRootModule(host, 'GraphQLModule', './graphql.module', options.project);

packages/apollo-angular/schematics/install/index.ts

@@ -90,18 +90,10 @@ describe('ng-add with standalone', () => {
     }
   });
 
-  test('should add graphqlProviders with GraphQL setup', async () => {
-    const providerPath = '/projects/apollo/src/app/graphql.provider.ts';
-    expect(tree.files).toContain(providerPath);
-
-    const content = getFileContent(tree, providerPath);
-    expect(content).toMatch('export const graphqlProvider');
-  });
-
-  test('should import the NgModule with GraphQL setup to the root module', async () => {
+  test('should use `provideApollo()` to provide Apollo', async () => {
     const content = getFileContent(tree, '/projects/apollo/src/app/app.config.ts');
 
-    expect(content).toMatch(/import { graphqlProvider } from '.\/graphql.provider'/);
+    expect(content).toMatch(/provideApollo\(\(\) => {/);
   });
 
   test('should import HttpClientModule to the root module', async () => {

packages/apollo-angular/schematics/tests/ng-add.spec.ts

@@ -1,9 +1,52 @@
-import { NgModule } from '@angular/core';
+import { NgModule, Provider } from '@angular/core';
+import { ApolloClientOptions } from '@apollo/client/core';
 import { Apollo } from './apollo';
+import { APOLLO_FLAGS, APOLLO_NAMED_OPTIONS, APOLLO_OPTIONS } from './tokens';
+import { Flags, NamedOptions } from './types';
 
-export const PROVIDERS = [Apollo];
-
+/**
+ * This is deprecated and will be removed in the next major version, because
+ * Angular is moving toward a moduleless ecosystem.
+ *
+ * Instead, use either `provideApollo()` or `provideNamedApollo()`.
+ *
+ * @deprecated
+ */
 @NgModule({
-  providers: PROVIDERS,
+  providers: [Apollo],
 })
 export class ApolloModule {}
+
+export function provideApollo<TCacheShape = any>(
+  optionsFactory: () => ApolloClientOptions<TCacheShape>,
+  flags: Flags = {},
+): Provider {
+  return [
+    Apollo,
+    {
+      provide: APOLLO_OPTIONS,
+      useFactory: optionsFactory,
+    },
+    {
+      provide: APOLLO_FLAGS,
+      useValue: flags,
+    },
+  ];
+}
+
+export function provideNamedApollo(
+  optionsFactory: () => NamedOptions,
+  flags: Flags = {},
+): Provider {
+  return [
+    Apollo,
+    {
+      provide: APOLLO_NAMED_OPTIONS,
+      useFactory: optionsFactory,
+    },
+    {
+      provide: APOLLO_FLAGS,
+      useValue: flags,
+    },
+  ];
+}

packages/apollo-angular/src/apollo-module.ts

@@ -1,5 +1,5 @@
 export type { TypedDocumentNode } from '@apollo/client/core';
-export { ApolloModule } from './apollo-module';
+export { ApolloModule, provideApollo, provideNamedApollo } from './apollo-module';
 export { Apollo, ApolloBase } from './apollo';
 export { QueryRef, QueryRefFromDocument } from './query-ref';
 export { Query } from './query';

packages/apollo-angular/src/index.ts

@@ -1,6 +1,6 @@
 import * as api from '../src';
 import { Apollo } from '../src/apollo';
-import { ApolloModule } from '../src/apollo-module';
+import { ApolloModule, provideApollo, provideNamedApollo } from '../src/apollo-module';
 import { gql, graphql } from '../src/gql';
 import { QueryRef } from '../src/query-ref';
 
@@ -14,6 +14,12 @@ describe('public api', () => {
   test('should export ApolloModule', () => {
     expect(api.ApolloModule).toBe(ApolloModule);
   });
+  test('should export provideApollo', () => {
+    expect(api.provideApollo).toBe(provideApollo);
+  });
+  test('should export provideNamedApollo', () => {
+    expect(api.provideNamedApollo).toBe(provideNamedApollo);
+  });
   test('should export gql', () => {
     expect(api.gql).toBe(gql);
   });

packages/apollo-angular/tests/index.spec.ts

@@ -2,23 +2,20 @@ import { HttpClientModule } from '@angular/common/http';
 import { TestBed } from '@angular/core/testing';
 import { InMemoryCache } from '@apollo/client/core';
 import { mockSingleLink } from '@apollo/client/testing';
-import { Apollo, APOLLO_OPTIONS, ApolloModule } from '../src';
+import { Apollo, provideApollo } from '../src';
 
 describe('Integration', () => {
   describe('default', () => {
     beforeEach(() => {
       TestBed.configureTestingModule({
-        imports: [ApolloModule, HttpClientModule],
+        imports: [HttpClientModule],
         providers: [
-          {
-            provide: APOLLO_OPTIONS,
-            useFactory: () => {
-              return {
-                link: mockSingleLink(),
-                cache: new InMemoryCache(),
-              };
-            },
-          },
+          provideApollo(() => {
+            return {
+              link: mockSingleLink(),
+              cache: new InMemoryCache(),
+            };
+          }),
         ],
       });
     });

packages/apollo-angular/tests/integration.spec.ts

@@ -1,14 +1,25 @@
+import { provideApollo } from 'apollo-angular';
+import { HttpLink } from 'apollo-angular/http';
 import { provideHttpClient } from '@angular/common/http';
-import { ApplicationConfig, provideZoneChangeDetection } from '@angular/core';
+import { ApplicationConfig, inject, provideZoneChangeDetection } from '@angular/core';
 import { provideRouter } from '@angular/router';
+import { InMemoryCache } from '@apollo/client/core';
 import { routes } from './app.routes';
-import { graphqlProvider } from './graphql.provider';
 
 export const appConfig: ApplicationConfig = {
   providers: [
     provideZoneChangeDetection({ eventCoalescing: true }),
     provideRouter(routes),
     provideHttpClient(),
-    graphqlProvider,
+    provideApollo(() => {
+      const httpLink = inject(HttpLink);
+
+      return {
+        link: httpLink.create({
+          uri: 'https://swapi-graphql.netlify.app/.netlify/functions/index',
+        }),
+        cache: new InMemoryCache(),
+      };
+    }),
   ],
 };