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feat: implement a basic backend #1

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reya merged 5 commits from feat/backend into master 2026-08-05 00:57:53 +00:00
Conversation 0 Commits 5 Files Changed 22
+214 -121
7 changed files with 214 additions and 121 deletions
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Showing only changes of commit 8707e71b53 - Show all commits
Cargo.lock
Generated
-1
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@@ -6815,7 +6815,6 @@ name = "signed_nostr"
version = "1.0.0"
dependencies = [
"anyhow",
"flume 0.11.1",
"nostr",
"nostr-connect",
"nostr-gossip-memory",
crates/signed_nostr/Cargo.toml
-1
View File
@@ -12,7 +12,6 @@ nostr-sdk.workspace = true
nostr-connect.workspace = true
nostr-gossip-memory.workspace = true
flume.workspace = true
anyhow.workspace = true
webbrowser.workspace = true
crates/signed_nostr/src/lib.rs
+2 -2
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@@ -1,7 +1,7 @@
mod backend;
pub mod pump;
mod signer;
mod update;
pub use backend::NostrBackend;
pub use pump::Update;
pub use signer::{SignedAuthUrlHandler, UniversalSigner};
pub use update::Update;
crates/signed_nostr/src/pump.rs → crates/signed_nostr/src/update.rs
+4 -18
View File
@@ -1,4 +1,3 @@
use flume::Sender;
use nostr_sdk::prelude::*;
/// A lightweight "something changed" signal for the UI.
@@ -13,18 +12,9 @@ pub struct Update {
pub event_id: EventId,
}
/// Consume the client notification stream and forward [`Update`]s into `tx`
/// until the receiving end is dropped or the client shuts down.
///
/// Spawn this once, e.g. inside `cx.background_spawn`.
pub async fn run(client: Client, tx: Sender<Update>) {
let mut notifications = client.notifications();
while let Some(notification) = notifications.next().await {
let ClientNotification::Event { event, .. } = notification else {
continue;
};
impl Update {
/// Build an update from a received event.
pub fn from_event(event: &Event) -> Self {
let coordinate = event
.tags
.iter()
@@ -32,15 +22,11 @@ pub async fn run(client: Client, tx: Sender<Update>) {
.and_then(|t| t.content())
.map(str::to_owned);
let update = Update {
Self {
kind: event.kind,
coordinate,
author: event.pubkey,
event_id: event.id,
};
if tx.send_async(update).await.is_err() {
break;
}
}
}
crates/signed_state/src/backend.rs
+44 -29
View File
@@ -1,7 +1,7 @@
use anyhow::Error;
use anyhow::{Error, anyhow};
use gpui::{App, AppContext, Context, Entity, EventEmitter, Global, Task};
use nostr_sdk::prelude::*;
use signed_nostr::{NostrBackend, UniversalSigner, pump::Update};
use signed_nostr::{NostrBackend, UniversalSigner, Update};
#[derive(Debug, Clone)]
pub enum BackendEvent {
@@ -54,26 +54,33 @@ impl Backend {
}
pub(crate) fn new(inner: NostrBackend, cx: &mut Context<Self>) -> Self {
// Pump: relays -> LMDB (automatic) -> flume -> BackendEvent::NostrUpdate.
let (tx, rx) = flume::bounded::<Update>(4096);
let client = inner.client();
let pump = cx.background_spawn(async move {
signed_nostr::pump::run(client, tx).await;
Ok(())
});
let pump = cx.spawn(async move |this, cx| {
let mut notifications = client.notifications();
let forward = cx.spawn(async move |this, cx| {
while let Ok(update) = rx.recv_async().await {
this.update(cx, |_, cx| cx.emit(BackendEvent::NostrUpdate(update)))?;
while let Some(notification) = notifications.next().await {
let ClientNotification::Event { event, .. } = notification else {
continue;
};
let update = Update::from_event(&event);
if this
.update(cx, |_, cx| cx.emit(BackendEvent::NostrUpdate(update)))
.is_err()
{
break;
}
}
Ok(())
});
Self {
inner,
current_user: None,
tasks: vec![pump, forward],
tasks: vec![pump],
}
}
@@ -141,9 +148,7 @@ impl Backend {
this.update(cx, |_this, cx| cx.emit(BackendEvent::Connected))?;
}
Err(e) => {
this.update(cx, |_this, cx| {
cx.emit(BackendEvent::error(e.to_string()))
})?;
this.update(cx, |_this, cx| cx.emit(BackendEvent::error(e.to_string())))?;
}
}
Ok(())
@@ -155,15 +160,11 @@ impl Backend {
pub fn subscribe(&mut self, filter: Filter, cx: &mut Context<Self>) {
let backend = self.inner.clone();
let task = cx.background_spawn(async move {
backend.subscribe(filter).await.map(|_| ())
});
let task = cx.background_spawn(async move { backend.subscribe(filter).await.map(|_| ()) });
self.tasks.push(cx.spawn(async move |this, cx| {
if let Err(e) = task.await {
this.update(cx, |_this, cx| {
cx.emit(BackendEvent::error(e.to_string()))
})?;
this.update(cx, |_this, cx| cx.emit(BackendEvent::error(e.to_string())))?;
}
Ok(())
}));
@@ -171,25 +172,39 @@ impl Backend {
/// Sign, broadcast and locally store an event. Emits
/// [`BackendEvent::Published`] on success so stores can refresh.
pub fn send(&mut self, builder: EventBuilder, cx: &mut Context<Self>) {
let backend = self.inner.clone();
///
/// The returned receiver yields the outcome of this specific action,
/// so callers can show inline progress/errors instead of relying on
/// the global [`BackendEvent::Error`].
pub fn send(
&mut self,
builder: EventBuilder,
cx: &mut Context<Self>,
) -> flume::Receiver<Result<Event, Error>> {
let (tx, rx) = flume::bounded(1);
let backend = self.inner.clone();
let task = cx.background_spawn(async move { backend.send(builder).await });
self.tasks.push(cx.spawn(async move |this, cx| {
match task.await {
let result = task.await;
match &result {
Ok(event) => {
this.update(cx, |_this, cx| {
cx.emit(BackendEvent::Published(Box::new(event)));
cx.emit(BackendEvent::Published(Box::new(event.clone())));
})?;
}
Err(e) => {
this.update(cx, |_this, cx| {
cx.emit(BackendEvent::error(e.to_string()))
})?;
this.update(cx, |_this, cx| cx.emit(BackendEvent::error(e.to_string())))?;
}
}
Ok(())
tx.send_async(result)
.await
.map_err(|_| anyhow!("action result receiver dropped"))
}));
rx
}
}
crates/signed_state/src/repo.rs
+106 -45
View File
@@ -10,7 +10,6 @@ use crate::backend::{Backend, BackendEvent};
pub struct RepoStore {
addr: RepoAddr,
addr_string: String,
pub announcement: Option<Announcement>,
/// `(refname, commit-id)` pairs from the latest state announcement.
pub refs: Vec<(String, String)>,
@@ -20,9 +19,12 @@ pub struct RepoStore {
pub patches: Vec<Event>,
pub pull_requests: Vec<Event>,
statuses: Vec<Event>,
_subscription: Subscription,
/// Error of the last action initiated from this store, if any.
pub last_error: Option<String>,
refreshing: bool,
refresh_dirty: bool,
tasks: Vec<Task<Result<(), Error>>>,
_subscription: Subscription,
}
impl RepoStore {
@@ -37,8 +39,7 @@ impl RepoStore {
&& update.author == this.addr.owner)
}
BackendEvent::Published(event) => {
event.kind == Kind::GitRepoAnnouncement
&& event.pubkey == this.addr.owner
event.kind == Kind::GitRepoAnnouncement && event.pubkey == this.addr.owner
|| event.tags.iter().any(|t| {
t.kind() == "a" && t.content() == Some(this.addr_string.as_str())
})
@@ -61,6 +62,9 @@ impl RepoStore {
patches: Vec::new(),
pull_requests: Vec::new(),
statuses: Vec::new(),
last_error: None,
refreshing: false,
refresh_dirty: false,
_subscription: subscription,
tasks: Vec::new(),
};
@@ -86,49 +90,92 @@ impl RepoStore {
}
/// Re-query the local database and update all fields.
///
/// Debounced: concurrent requests are coalesced into a single re-query
/// after the running one finishes.
pub fn refresh(&mut self, cx: &mut Context<Self>) {
if self.refreshing {
self.refresh_dirty = true;
return;
}
self.refreshing = true;
let client = Backend::global(cx).read(cx).client();
let addr = self.addr.clone();
let task = cx.spawn(async move |this, cx| {
let db = client.database();
loop {
let queries = async {
let db = client.database();
let announcements = db.query(filters::announcement(&addr)).await?;
let states = db.query(filters::state(&addr)).await?;
let activity = db.query(filters::activity(&addr)).await?;
let announcements = db.query(filters::announcement(&addr)).await?;
let states = db.query(filters::state(&addr)).await?;
let activity = db.query(filters::activity(&addr)).await?;
this.update(cx, |this, cx| {
this.announcement = latest(announcements).as_ref().and_then(Announcement::from_event);
if let Some(state) = latest(states) {
let (refs, head) = parse_state(&state);
this.refs = refs;
this.head = head;
Ok::<_, Error>((announcements, states, activity))
}
.await;
this.issues.clear();
this.patches.clear();
this.pull_requests.clear();
this.statuses.clear();
for event in activity {
match event.kind {
Kind::GitIssue => this.issues.push(event),
Kind::GitPatch => this.patches.push(event),
Kind::GitPullRequest | Kind::GitPullRequestUpdate => {
this.pull_requests.push(event)
}
kind if RepoStatus::from_kind(kind).is_some() => this.statuses.push(event),
_ => {}
let (announcements, states, activity) = match queries {
Ok(results) => results,
Err(e) => {
return this.update(cx, |this, cx| {
this.refreshing = false;
this.last_error = Some(e.to_string());
cx.notify();
});
}
};
let again = this.update(cx, |this, cx| {
this.announcement = latest(announcements)
.as_ref()
.and_then(Announcement::from_event);
if let Some(state) = latest(states) {
let (refs, head) = parse_state(&state);
this.refs = refs;
this.head = head;
}
this.issues.clear();
this.patches.clear();
this.pull_requests.clear();
this.statuses.clear();
for event in activity {
match event.kind {
Kind::GitIssue => this.issues.push(event),
Kind::GitPatch => this.patches.push(event),
Kind::GitPullRequest | Kind::GitPullRequestUpdate => {
this.pull_requests.push(event)
}
kind if RepoStatus::from_kind(kind).is_some() => {
this.statuses.push(event)
}
_ => {}
}
}
sort_newest_first(&mut this.issues);
sort_newest_first(&mut this.patches);
sort_newest_first(&mut this.pull_requests);
cx.notify();
if this.refresh_dirty {
this.refresh_dirty = false;
true
} else {
this.refreshing = false;
false
}
})?;
if !again {
break;
}
sort_newest_first(&mut this.issues);
sort_newest_first(&mut this.patches);
sort_newest_first(&mut this.pull_requests);
cx.notify();
})?;
}
Ok(())
});
@@ -171,12 +218,11 @@ impl RepoStore {
return;
};
let builder = EventBuilder::new(Kind::GitPatch, patch)
.tags([
Tag::coordinate(self.addr.coordinate(), None),
Tag::public_key(self.addr.owner),
root_marker,
]);
let builder = EventBuilder::new(Kind::GitPatch, patch).tags([
Tag::coordinate(self.addr.coordinate(), None),
Tag::public_key(self.addr.owner),
root_marker,
]);
self.send(builder, cx);
}
@@ -197,8 +243,23 @@ impl RepoStore {
self.send(builder, cx);
}
fn send(&self, builder: EventBuilder, cx: &mut Context<Self>) {
Backend::global(cx).update(cx, |backend, cx| backend.send(builder, cx));
fn send(&mut self, builder: EventBuilder, cx: &mut Context<Self>) {
self.last_error = None;
let rx = Backend::global(cx).update(cx, |backend, cx| backend.send(builder, cx));
let task = cx.spawn(async move |this, cx| {
if let Ok(Err(e)) = rx.recv_async().await {
this.update(cx, |this, cx| {
this.last_error = Some(e.to_string());
cx.notify();
})?;
}
Ok(())
});
self.tasks.push(task);
}
}
crates/signed_state/src/repo_list.rs
+58 -25
View File
@@ -11,9 +11,10 @@ use crate::backend::{Backend, BackendEvent};
pub struct RepoListStore {
pub announcements: Vec<Announcement>,
author: Option<PublicKey>,
_subscription: Subscription,
refreshing: bool,
refresh_dirty: bool,
tasks: Vec<Task<Result<(), Error>>>,
_subscription: Subscription,
}
impl RepoListStore {
@@ -40,6 +41,8 @@ impl RepoListStore {
let mut store = Self {
announcements: Vec::new(),
author,
refreshing: false,
refresh_dirty: false,
_subscription: subscription,
tasks: Vec::new(),
};
@@ -69,42 +72,72 @@ impl RepoListStore {
}
/// Re-query the local database. Latest announcement per repository wins.
///
/// Debounced: concurrent requests are coalesced into a single re-query
/// after the running one finishes.
pub fn refresh(&mut self, cx: &mut Context<Self>) {
if self.refreshing {
self.refresh_dirty = true;
return;
}
self.refreshing = true;
let client = Backend::global(cx).read(cx).client();
let author = self.author;
let task = cx.spawn(async move |this, cx| {
let filter = match author {
Some(a) => filters::announcements_by(a),
None => filters::all_announcements(500),
};
loop {
let filter = match author {
Some(a) => filters::announcements_by(a),
None => filters::all_announcements(500),
};
let events = client.database().query(filter).await?;
let events = match client.database().query(filter).await {
Ok(events) => events,
Err(_) => {
return this.update(cx, |this, _cx| {
this.refreshing = false;
});
}
};
this.update(cx, |this, cx| {
let mut by_repo: HashMap<(String, String), Announcement> = HashMap::new();
let again = this.update(cx, |this, cx| {
let mut by_repo: HashMap<(String, String), Announcement> = HashMap::new();
for event in events {
let Some(announcement) = Announcement::from_event(&event) else {
continue;
};
for event in events {
let Some(announcement) = Announcement::from_event(&event) else {
continue;
};
let key = (announcement.owner.to_hex(), announcement.id.clone());
let key = (announcement.owner.to_hex(), announcement.id.clone());
match by_repo.get(&key) {
Some(existing) if existing.created_at >= announcement.created_at => {}
_ => {
by_repo.insert(key, announcement);
match by_repo.get(&key) {
Some(existing) if existing.created_at >= announcement.created_at => {}
_ => {
by_repo.insert(key, announcement);
}
}
}
let mut announcements: Vec<Announcement> = by_repo.into_values().collect();
announcements.sort_by_key(|a| std::cmp::Reverse(a.created_at));
this.announcements = announcements;
cx.notify();
if this.refresh_dirty {
this.refresh_dirty = false;
true
} else {
this.refreshing = false;
false
}
})?;
if !again {
break;
}
let mut announcements: Vec<Announcement> = by_repo.into_values().collect();
announcements.sort_by_key(|a| std::cmp::Reverse(a.created_at));
this.announcements = announcements;
cx.notify();
})?;
}
Ok(())
});