feat: update

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/scel_api/src/graphql/subscription.rs

@@ -0,0 +1,49 @@
+use std::sync::Arc;
+
+use async_graphql::{
+    async_stream::stream, futures_util::Stream, Context, Object, Subscription, ID,
+};
+use scel_core::App;
+
+use super::query::Download;
+
+pub struct SubscriptionRoot;
+
+struct DownloadChanged {
+    download: Download,
+}
+
+#[Object]
+impl DownloadChanged {
+    async fn download(&self) -> Download {
+        self.download.clone()
+    }
+}
+
+#[Subscription]
+impl SubscriptionRoot {
+    async fn get_download(&self, ctx: &Context<'_>, id: ID) -> impl Stream<Item = DownloadChanged> {
+        let app = ctx.data_unchecked::<Arc<App>>();
+
+        let mut stream = app
+            .download_service
+            .subscribe_download(id.to_string())
+            .await;
+
+        stream! {
+            while stream.changed().await.is_ok() {
+                let next_download = (*stream.borrow()).clone();
+                let id = ID::from(next_download.id.unwrap());
+
+                yield DownloadChanged {
+                    download: Download {
+                        id: id,
+                        link: next_download.link,
+                        file_name: next_download.file_name,
+                        progress: next_download.progress,
+                    }
+                }
+            }
+        }
+    }
+}