crates/signed_state/src/profile.rs

@@ -1,7 +1,9 @@
 use std::collections::{HashMap, HashSet};
-use std::time::Duration;
+use std::sync::RwLock;
+use std::time::{Duration, Instant};
 
 use anyhow::Error;
+use flume::{Receiver, RecvTimeoutError, Sender};
 use gpui::{App, AppContext, Context, Entity, Global, SharedString, Subscription, Task};
 use nostr_sdk::prelude::*;
 
@@ -63,15 +65,23 @@ pub fn shorten_pubkey(public_key: PublicKey, len: usize) -> String {
     format!("{}...{}", &npub[..(len + 5)], &npub[npub.len() - len..])
 }
 
+/// Message from the fetch task to the main thread.
+enum Dispatch {
+    /// A batched sync finished; re-read seen profiles from the database.
+    Synced,
+}
+
+/// How long to wait for more requests before firing a batched sync.
+const BATCH_TIMEOUT: Duration = Duration::from_millis(500);
+
 /// Global profile cache. Profiles are fetched in batches and kept as plain
 /// data; the whole store notifies on change.
 pub struct ProfileStore {
     profiles: HashMap<PublicKey, Profile>,
     /// Public keys we've already requested this session.
-    seen: HashSet<PublicKey>,
-    /// Public keys queued for the next batched fetch.
-    queued: HashSet<PublicKey>,
-    fetching: bool,
+    seen: RwLock<HashSet<PublicKey>>,
+    /// Sender for queuing fetch requests, batched by a background task.
+    sender: Sender<PublicKey>,
     tasks: Vec<Task<Result<(), Error>>>,
     _subscription: Subscription,
 }
@@ -106,12 +116,31 @@ impl ProfileStore {
             _ => {}
         });
 
+        // Fetch requests are queued on a channel and synced in batches by a
+        // background task.
+        let client = backend.read(cx).client();
+        let (sender, receiver) = flume::unbounded::<PublicKey>();
+        let (dispatch_tx, dispatch_rx) = flume::unbounded::<Dispatch>();
+
+        let mut tasks = Vec::new();
+
+        tasks.push(cx.background_spawn(async move {
+            Self::handle_requests(&client, &dispatch_tx, &receiver).await
+        }));
+
+        // Re-read seen profiles from the database after each batch sync.
+        tasks.push(cx.spawn(async move |this, cx| {
+            while let Ok(Dispatch::Synced) = dispatch_rx.recv_async().await {
+                this.update(cx, |this, cx| this.apply_seen(cx)).ok();
+            }
+            Ok(())
+        }));
+
         let mut store = Self {
             profiles: HashMap::new(),
-            seen: HashSet::new(),
-            queued: HashSet::new(),
-            fetching: false,
-            tasks: Vec::new(),
+            seen: RwLock::new(HashSet::new()),
+            sender,
+            tasks,
             _subscription: subscription,
         };
 
@@ -121,14 +150,17 @@ impl ProfileStore {
 
     /// Get a profile. Returns a placeholder (default metadata) and queues a
     /// fetch if the profile isn't cached yet.
-    pub fn get(&mut self, public_key: PublicKey, cx: &mut Context<Self>) -> Profile {
-        if let Some(profile) = self.profiles.get(&public_key) {
+    pub fn get(&self, public_key: &PublicKey) -> Profile {
+        if let Some(profile) = self.profiles.get(public_key) {
             return profile.clone();
         }
 
-        if self.seen.insert(public_key) {
-            self.queued.insert(public_key);
-            self.queue_fetch(cx);
+        let public_key = *public_key;
+
+        if self.seen.write().unwrap().insert(public_key)
+            && let Err(e) = self.sender.send(public_key)
+        {
+            log::warn!("failed to queue profile fetch: {e}");
         }
 
         Profile::new(public_key, Metadata::default())
@@ -205,12 +237,12 @@ impl ProfileStore {
     /// Re-read the latest metadata of every requested author from the local
     /// database (used after a sync, which produces no NostrUpdate events).
     fn apply_seen(&mut self, cx: &mut Context<Self>) {
-        if self.seen.is_empty() {
+        let authors: Vec<PublicKey> = self.seen.read().unwrap().iter().copied().collect();
+        if authors.is_empty() {
             return;
         }
 
         let client = Backend::global(cx).read(cx).client();
-        let authors: Vec<PublicKey> = self.seen.iter().copied().collect();
 
         let work = cx.background_spawn(async move {
             let filter = Filter::new().kind(Kind::Metadata).authors(authors);
@@ -255,51 +287,47 @@ impl ProfileStore {
         }));
     }
 
-    /// Drain the queue in a batched fetch, debounced to collect requests.
-    fn queue_fetch(&mut self, cx: &mut Context<Self>) {
-        if self.fetching {
-            return;
-        }
-        self.fetching = true;
+    /// Sync metadata for requested authors in batches, debounced to collect
+    /// requests. Runs on a background thread; results are dispatched to the
+    /// main thread, which re-reads the database.
+    async fn handle_requests(
+        client: &Client,
+        dispatch: &Sender<Dispatch>,
+        receiver: &Receiver<PublicKey>,
+    ) -> Result<(), Error> {
+        let mut batch: HashSet<PublicKey> = HashSet::new();
 
-        let client = Backend::global(cx).read(cx).client();
-
-        let task = cx.spawn(async move |this, cx| {
-            loop {
-                // Collect more requests before firing the batch.
-                cx.background_executor()
-                    .timer(Duration::from_millis(500))
-                    .await;
-
-                let batch = this.update(cx, |this, _cx| std::mem::take(&mut this.queued))?;
-
-                if batch.is_empty() {
-                    this.update(cx, |this, _cx| {
-                        this.fetching = false;
-                    })?;
-                    break;
+        loop {
+            // Wait for the first request of a batch.
+            match receiver.recv_timeout(BATCH_TIMEOUT) {
+                Ok(public_key) => {
+                    batch.insert(public_key);
                 }
+                Err(RecvTimeoutError::Disconnected) => return Ok(()),
+                Err(RecvTimeoutError::Timeout) => continue,
+            };
 
-                let filter = Filter::new()
-                    .kind(Kind::Metadata)
-                    .authors(batch.into_iter().collect::<Vec<PublicKey>>());
-
-                // Negentropy-sync with the bootstrap relays. Synced events
-                // are written to the database directly (no NostrUpdate), so
-                // re-apply from the database afterwards.
-                match sync_bootstrap_only(&client, filter, SyncOptions::default()).await {
-                    Ok(_) => {
-                        this.update(cx, |this, cx| this.apply_seen(cx))?;
-                    }
-                    Err(e) => {
-                        log::warn!("profile sync failed: {e}");
-                    }
-                }
+            // Collect everything that arrives within the debounce window.
+            let deadline = Instant::now() + BATCH_TIMEOUT;
+            while let Ok(public_key) = receiver.recv_deadline(deadline) {
+                batch.insert(public_key);
             }
 
-            Ok(())
-        });
+            let filter = Filter::new()
+                .kind(Kind::Metadata)
+                .authors(batch.drain().collect::<Vec<PublicKey>>());
 
-        self.tasks.push(task);
+            // Negentropy-sync with the bootstrap relays. Synced events are
+            // written to the database directly (no NostrUpdate), so re-apply
+            // from the database afterwards.
+            match sync_bootstrap_only(client, filter, SyncOptions::default()).await {
+                Ok(_) => {
+                    if dispatch.send(Dispatch::Synced).is_err() {
+                        log::warn!("profile dispatch channel closed, dropping sync result");
+                    }
+                }
+                Err(e) => log::warn!("profile sync failed: {e}"),
+            }
+        }
     }
 }

crates/workspace/src/views/repo_list.rs

@@ -34,7 +34,8 @@ impl RepoListView {
             .unwrap_or_else(|| announcement.id.clone());
 
         let owner = ProfileStore::global(cx)
-            .update(cx, |store, cx| store.get(announcement.owner, cx))
+            .read(cx)
+            .get(&announcement.owner)
             .name();
 
         let description = announcement.description.clone().unwrap_or_default();

crates/workspace/src/views/sidebar/mod.rs

@@ -2,14 +2,15 @@ use std::sync::Arc;
 
 use gpui::prelude::*;
 use gpui::{
-    App, Context, EventEmitter, FocusHandle, Focusable, Render, Subscription, WeakEntity, Window,
-    div,
+    App, ClickEvent, Context, ElementId, EventEmitter, FocusHandle, Focusable, Render,
+    SharedString, StyleRefinement, Subscription, WeakEntity, Window, div,
 };
+use gpui_component::avatar::Avatar;
 use gpui_component::button::{Button, ButtonVariants};
 use gpui_component::dock::{DockArea, DockPlacement, Panel, PanelEvent};
 use gpui_component::input::InputState;
-use gpui_component::{ActiveTheme, v_flex};
-use signed_state::{Backend, BackendEvent};
+use gpui_component::{ActiveTheme, Icon, IconName, Sizable, StyledExt, h_flex, v_flex};
+use signed_state::{Backend, BackendEvent, ProfileStore};
 
 use super::RepoListView;
 
@@ -128,15 +129,8 @@ impl Focusable for SidebarPanel {
 
 impl Render for SidebarPanel {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        if self.logged_in {
-            v_flex().child(
-                Button::new("explore")
-                    .label("Explore")
-                    .w_full()
-                    .on_click(cx.listener(|this, _, window, cx| this.open_explore(window, cx))),
-            )
-        } else {
-            v_flex()
+        if !self.logged_in {
+            return v_flex()
                 .p_4()
                 .size_full()
                 .items_center()
@@ -165,7 +159,148 @@ impl Render for SidebarPanel {
                         .on_click(
                             cx.listener(|this, _ev, window, cx| this.open_import(window, cx)),
                         ),
-                )
+                );
         }
+
+        let backend = Backend::global(cx);
+        let profile_store = ProfileStore::global(cx);
+
+        let profile = backend
+            .read(cx)
+            .current_user()
+            .map(|public_key| profile_store.read(cx).get(&public_key));
+
+        v_flex()
+            .size_full()
+            .justify_between()
+            .bg(cx.theme().sidebar)
+            .text_color(cx.theme().sidebar_foreground)
+            .child(
+                div()
+                    .flex_1()
+                    .when_some(profile.as_ref(), |this, profile| {
+                        let name = profile.name();
+                        let picture = profile.picture();
+
+                        this.child(
+                            h_flex()
+                                .h_12()
+                                .px_3()
+                                .gap_2()
+                                .child(
+                                    Avatar::new()
+                                        .name(name.clone())
+                                        .when_some(picture, |this, url| this.src(url))
+                                        .small()
+                                        .border_0(),
+                                )
+                                .child(div().text_sm().child(name)),
+                        )
+                    })
+                    .child(
+                        v_flex()
+                            .px_2()
+                            .gap_1()
+                            .items_start()
+                            .justify_start()
+                            .child(NavItem::new("inbox", "Inbox", IconName::Inbox).on_click(
+                                cx.listener(|this, _ev, window, cx| this.open_explore(window, cx)),
+                            ))
+                            .child(NavItem::new("explore", "Browse", IconName::Globe).on_click(
+                                cx.listener(|this, _ev, window, cx| this.open_explore(window, cx)),
+                            ))
+                            .child(
+                                v_flex().w_full().child(
+                                    h_flex()
+                                        .h_10()
+                                        .w_full()
+                                        .justify_between()
+                                        .items_center()
+                                        .child(
+                                            h_flex()
+                                                .px_2()
+                                                .gap_2()
+                                                .text_color(cx.theme().muted_foreground)
+                                                .child(Icon::new(IconName::Folder).small())
+                                                .child(
+                                                    div()
+                                                        .text_xs()
+                                                        .font_semibold()
+                                                        .child("All Repositories"),
+                                                ),
+                                        )
+                                        .child(
+                                            Button::new("add").icon(IconName::Plus).small().ghost(),
+                                        ),
+                                ),
+                            ),
+                    ),
+            )
+            .child(
+                v_flex()
+                    .p_2()
+                    .flex_shrink_0()
+                    .gap_1()
+                    .items_start()
+                    .justify_start()
+                    .child(NavItem::new("guide", "Guide", IconName::Info).on_click(
+                        cx.listener(|this, _ev, window, cx| this.open_explore(window, cx)),
+                    ))
+                    .child(
+                        NavItem::new("settings", "Settings", IconName::Settings).on_click(
+                            cx.listener(|this, _ev, window, cx| this.open_explore(window, cx)),
+                        ),
+                    ),
+            )
+    }
+}
+
+/// A single navigation entry in the sidebar: an icon and label with a hover
+/// highlight and an optional click handler.
+#[allow(clippy::type_complexity)]
+#[derive(IntoElement)]
+struct NavItem {
+    id: ElementId,
+    style: StyleRefinement,
+    icon: IconName,
+    label: SharedString,
+    on_click: Option<Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>>,
+}
+
+impl NavItem {
+    fn new<I, L>(id: I, label: L, icon: IconName) -> Self
+    where
+        I: Into<ElementId>,
+        L: Into<SharedString>,
+    {
+        Self {
+            id: id.into(),
+            icon,
+            label: label.into(),
+            style: StyleRefinement::default(),
+            on_click: None,
+        }
+    }
+
+    fn on_click(mut self, listener: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static) -> Self {
+        self.on_click = Some(Box::new(listener));
+        self
+    }
+}
+
+impl RenderOnce for NavItem {
+    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
+        h_flex()
+            .id(self.id)
+            .refine_style(&self.style)
+            .px_2()
+            .py_1()
+            .w_full()
+            .gap_2()
+            .rounded(cx.theme().radius)
+            .child(Icon::new(self.icon).small())
+            .child(div().text_sm().child(self.label))
+            .hover(|this| this.bg(cx.theme().list_hover))
+            .when_some(self.on_click, |this, listener| this.on_click(listener))
     }
 }