feat(realtime): Expose store and pubsub for easier access (#9138)

**Problem**
We want to be able to do things like invalidate the live query store
from outside of a full graphql request - so without access to the
context which these properties are typically attached to.

Eg: Watching a file for changes and then invalidating a query when that
file updates.

**Changes**
1. Expose the pubsub and liveQueryStore from the realtime package
2. Minor renaming to make the exporting more convenient 

**Outstanding**
1. We may wish to do a future refactor to prevent inadvertent mutations
of these but this does not need to be done right now.

packages/realtime/src/graphql/index.ts

@@ -4,6 +4,8 @@ export {
   liveDirectiveTypeDefs,
   InMemoryLiveQueryStore,
   RedisLiveQueryStore,
+  liveQueryStore,
+  pubSub,
 } from './plugins/useRedwoodRealtime'
 
 export type {

packages/realtime/src/graphql/plugins/useRedwoodRealtime.ts

@@ -143,15 +143,19 @@ export class RedisLiveQueryStore {
   }
 }
 
+// These are exported to allow access to the store and pubsub outside of graphql execution
+export let liveQueryStore: LiveQueryStorageMechanism | undefined = undefined
+export let pubSub: ReturnType<typeof createPubSub> | undefined = undefined
+
 export const useRedwoodRealtime = (options: RedwoodRealtimeOptions): Plugin => {
   let liveQueriesEnabled = false
   let subscriptionsEnabled = false
 
   let liveQueryPlugin = {} as Plugin
-  let liveQueryStorageMechanism = {} as LiveQueryStorageMechanism
   const inMemoryLiveQueryStore = new InMemoryLiveQueryStore()
 
-  let pubSub = {} as ReturnType<typeof createPubSub>
+  liveQueryStore = {} as LiveQueryStorageMechanism
+  pubSub = {} as ReturnType<typeof createPubSub>
 
   /**
    * This symbol is added to the schema extensions for checking whether the live query was added to the schema only once.
@@ -162,21 +166,21 @@ export const useRedwoodRealtime = (options: RedwoodRealtimeOptions): Plugin => {
     if (options.liveQueries.store === 'in-memory') {
       liveQueriesEnabled = true
 
-      liveQueryStorageMechanism = inMemoryLiveQueryStore
+      liveQueryStore = inMemoryLiveQueryStore
       liveQueryPlugin = useLiveQuery({
-        liveQueryStore: liveQueryStorageMechanism,
+        liveQueryStore,
       })
     } else if (options.liveQueries.store.redis) {
       liveQueriesEnabled = true
 
-      liveQueryStorageMechanism = new RedisLiveQueryStore(
+      liveQueryStore = new RedisLiveQueryStore(
         options.liveQueries.store.redis.publishClient,
         options.liveQueries.store.redis.subscribeClient,
         options.liveQueries.store.redis.channel || 'live-query-invalidations',
         inMemoryLiveQueryStore
       ) as unknown as InMemoryLiveQueryStore
       liveQueryPlugin = useLiveQuery({
-        liveQueryStore: liveQueryStorageMechanism,
+        liveQueryStore,
       })
     } else {
       throw new Error('Invalid live query store configuration.')
@@ -228,7 +232,7 @@ export const useRedwoodRealtime = (options: RedwoodRealtimeOptions): Plugin => {
     onContextBuilding() {
       return ({ extendContext }) => {
         extendContext({
-          liveQueryStore: liveQueriesEnabled && liveQueryStorageMechanism,
+          liveQueryStore: liveQueriesEnabled && liveQueryStore,
           pubSub: subscriptionsEnabled && pubSub,
         })
       }

packages/realtime/src/index.ts

@@ -4,6 +4,8 @@ export {
   liveDirectiveTypeDefs,
   InMemoryLiveQueryStore,
   RedisLiveQueryStore,
+  liveQueryStore,
+  pubSub,
 } from './graphql'
 
 export type {