UBER-1150 Expose collaborative provider loaded state (#3934)

Signed-off-by: Alexander Onnikov <alexander.onnikov@xored.com>

packages/text-editor/src/components/CollaboratorEditor.svelte

@@ -96,14 +96,7 @@
     })
 
   let loading = true
-
-  if (contextProvider === undefined) {
-    provider?.on('synced', () => {
-      loading = false
-    })
-  } else {
-    loading = false
-  }
+  provider.loaded.then(() => (loading = false))
 
   const currentUser = getCurrentAccount()
 

packages/text-editor/src/provider.ts

@@ -19,8 +19,14 @@ export type TiptapCollabProviderConfiguration = HocuspocusProviderConfiguration
 Required<Pick<HocuspocusProviderConfiguration, 'token'>>
 
 export class TiptapCollabProvider extends HocuspocusProvider {
+  loaded: Promise<void>
+
   constructor (configuration: TiptapCollabProviderConfiguration) {
     super(configuration as HocuspocusProviderConfiguration)
+
+    this.loaded = new Promise((resolve) => {
+      this.on('synced', resolve)
+    })
   }
 
   copyContent (sourceId: string, targetId: string): void {