WIP subscription support, will require switching webserver

server/src/graphql.rs

@@ -2,10 +2,11 @@ use std::{fmt, str::FromStr};
 
 use async_graphql::{
     connection::{self, Connection, Edge, OpaqueCursor},
-    Context, EmptySubscription, Enum, Error, FieldResult, InputObject, Object, Schema,
-    SimpleObject, Union,
+    futures_util::{Stream, StreamExt},
+    Context, Enum, Error, FieldResult, InputObject, Object, Schema, SimpleObject, Union,
 };
 use cacher::FilesystemCacher;
+use futures::stream;
 use letterbox_notmuch::Notmuch;
 use log::info;
 use serde::{Deserialize, Serialize};
@@ -667,4 +668,12 @@ impl Mutation {
     }
 }
 
-pub type GraphqlSchema = Schema<QueryRoot, Mutation, EmptySubscription>;
+pub struct Subscription;
+#[async_graphql::Subscription]
+impl Subscription {
+    async fn values(&self, ctx: &Context<'_>) -> Result<impl Stream<Item = usize>, Error> {
+        Ok(stream::iter(0..10))
+    }
+}
+
+pub type GraphqlSchema = Schema<QueryRoot, Mutation, Subscription>;