From 7879187b60013c5ee9e513968f613a8cf624effb Mon Sep 17 00:00:00 2001
From: Rebecca Richards <rrichards@earnestresearch.com>
Date: Thu, 26 Oct 2023 22:31:05 +0100
Subject: [PATCH] feat: add support for queryDeduplication apollo config option

---
 README.md                                         | 1 +
 docs/content/1.getting-started/2.configuration.md | 1 +
 src/module.ts                                     | 7 +++++--
 src/runtime/plugin.ts                             | 3 ++-
 src/types.d.ts                                    | 8 ++++++++
 5 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index baa0d7d..4b54976 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@
 - Ensure you have the latest LTS version of Node.js installed
 - Run `corepack enable`
 - Install dependencies using `pnpm install`
+- Build the module and prepare the playground `pnpm dev:prepare`
 - Start playground with `pnpm dev`
 
 ## License
diff --git a/docs/content/1.getting-started/2.configuration.md b/docs/content/1.getting-started/2.configuration.md
index 076be71..1228690 100644
--- a/docs/content/1.getting-started/2.configuration.md
+++ b/docs/content/1.getting-started/2.configuration.md
@@ -16,6 +16,7 @@ export default defineNuxtConfig({
     authHeader: 'Authorization',
     tokenStorage: 'cookie',
     proxyCookies: true,
+    queryDeduplication: true,
     clients: {}
   }
 })
diff --git a/src/module.ts b/src/module.ts
index 51eb1f1..6725048 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -36,7 +36,8 @@ export default defineNuxtModule<NuxtApolloConfig<any>>({
       maxAge: 60 * 60 * 24 * 7,
       secure: process.env.NODE_ENV === 'production'
     },
-    clientAwareness: false
+    clientAwareness: false,
+    queryDeduplication: true
   },
   async setup (options, nuxt) {
     if (!options.clients || !Object.keys(options.clients).length) {
@@ -95,9 +96,10 @@ export default defineNuxtModule<NuxtApolloConfig<any>>({
         'import type { ClientConfig } from "@nuxtjs/apollo"',
         'declare const clients: Record<string, ClientConfig>',
         'declare const clientAwareness: boolean',
+        'declare const queryDeduplication: boolean',
         'declare const proxyCookies: boolean',
         'declare const cookieAttributes: ClientConfig[\'cookieAttributes\']',
-        'export default { clients, clientAwareness, proxyCookies, cookieAttributes }'
+        'export default { clients, clientAwareness, queryDeduplication, proxyCookies, cookieAttributes }'
       ].join('\n')
     })
 
@@ -107,6 +109,7 @@ export default defineNuxtModule<NuxtApolloConfig<any>>({
         'export default {',
         ` proxyCookies: ${options.proxyCookies},`,
         ` clientAwareness: ${options.clientAwareness},`,
+        ` queryDeduplication: ${options.queryDeduplication},`,
         ` cookieAttributes: ${JSON.stringify(options.cookieAttributes)},`,
         ` clients: ${JSON.stringify(clients)}`,
         '}'
diff --git a/src/runtime/plugin.ts b/src/runtime/plugin.ts
index 269241a..9ee263d 100644
--- a/src/runtime/plugin.ts
+++ b/src/runtime/plugin.ts
@@ -116,7 +116,8 @@ export default defineNuxtPlugin((nuxtApp) => {
         ? { ssrMode: true }
         : { ssrForceFetchDelay: 100 }),
       connectToDevTools: clientConfig.connectToDevTools || false,
-      defaultOptions: clientConfig?.defaultOptions
+      defaultOptions: clientConfig?.defaultOptions,
+      queryDeduplication: NuxtApollo.queryDeduplication
     })
 
     if (!clients?.default && !NuxtApollo?.clients?.default && key === Object.keys(NuxtApollo.clients)[0]) {
diff --git a/src/types.d.ts b/src/types.d.ts
index 11771b2..da777eb 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -170,4 +170,12 @@ export interface NuxtApolloConfig<T = ClientConfig> {
    * @default false
    */
   clientAwareness?: boolean
+
+  /**
+   * If false, Apollo Client sends every created query to the server,
+   * even if a completely identical query is already in flight.
+   * @type {boolean}
+   * @default true
+   **/
+  queryDeduplication?: boolean;
 }