WIP subscription support, will require switching webserver

server/src/bin/letterbox-server.rs

@@ -14,7 +14,7 @@ use letterbox_server::tantivy::TantivyConnection;
 use letterbox_server::{
     config::Config,
     error::ServerError,
-    graphql::{Attachment, GraphqlSchema, Mutation, QueryRoot},
+    graphql::{Attachment, GraphqlSchema, Mutation, QueryRoot, Subscription},
     nm::{attachment_bytes, cid_attachment_bytes},
 };
 use rocket::{
@@ -159,7 +159,12 @@ async fn original(
 
 #[rocket::get("/")]
 fn graphiql() -> content::RawHtml<String> {
-    content::RawHtml(GraphiQLSource::build().endpoint("/api/graphql").finish())
+    content::RawHtml(
+        GraphiQLSource::build()
+            .endpoint("/api/graphql")
+            .subscription_endpoint("/api/graphql")
+            .finish(),
+    )
 }
 
 #[rocket::get("/graphql?<query..>")]
@@ -222,7 +227,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     let tantivy_conn = TantivyConnection::new(&config.newsreader_tantivy_db_path)?;
 
     let cacher = FilesystemCacher::new(&config.slurp_cache_path)?;
-    let schema = Schema::build(QueryRoot, Mutation, EmptySubscription)
+    let schema = Schema::build(QueryRoot, Mutation, Subscription)
         .data(Notmuch::default())
         .data(cacher)
         .data(pool.clone());