mirror of
git://jb55.com/damus
synced 2024-09-19 11:43:44 +00:00
refinements to RelayConnection and RelayPool
This commit is contained in:
parent
0210ae5d61
commit
673358408a
@ -31,9 +31,9 @@ class EventsModel: ObservableObject {
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}
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func subscribe() {
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state.pool.subscribe(sub_id: sub_id,
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filters: [get_filter()],
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handler: handle_nostr_event)
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state.pool.subscribe_to(sub_id: sub_id,
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filters: [get_filter()],
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handler: handle_nostr_event)
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}
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func unsubscribe() {
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@ -40,7 +40,7 @@ class FollowersModel: ObservableObject {
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let filter = get_filter()
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let filters = [filter]
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print_filters(relay_id: "following", filters: [filters])
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self.damus_state.pool.subscribe(sub_id: sub_id, filters: filters, handler: handle_event)
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self.damus_state.pool.subscribe_to(sub_id: sub_id, filters: filters, handler: handle_event)
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}
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func unsubscribe() {
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@ -41,7 +41,7 @@ class FollowingModel {
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}
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let filters = [filter]
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print_filters(relay_id: "following", filters: [filters])
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self.damus_state.pool.subscribe(sub_id: sub_id, filters: filters, handler: handle_event)
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self.damus_state.pool.subscribe_to(sub_id: sub_id, filters: filters, handler: handle_event)
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}
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func unsubscribe() {
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@ -83,8 +83,8 @@ class ProfileModel: ObservableObject, Equatable {
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print("subscribing to profile \(pubkey) with sub_id \(sub_id)")
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print_filters(relay_id: "profile", filters: [[text_filter], [profile_filter]])
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damus.pool.subscribe(sub_id: sub_id, filters: [text_filter], handler: handle_event)
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damus.pool.subscribe(sub_id: prof_subid, filters: [profile_filter], handler: handle_event)
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damus.pool.subscribe_to(sub_id: sub_id, filters: [text_filter], handler: handle_event)
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damus.pool.subscribe_to(sub_id: prof_subid, filters: [profile_filter], handler: handle_event)
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}
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func handle_profile_contact_event(_ ev: NostrEvent) {
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@ -38,7 +38,7 @@ class SearchHomeModel: ObservableObject {
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func subscribe() {
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loading = true
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let to_relays = determine_to_relays(pool: damus_state.pool, filters: damus_state.relay_filters)
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damus_state.pool.subscribe(sub_id: base_subid, filters: [get_base_filter()], handler: handle_event, to: to_relays)
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damus_state.pool.subscribe_to(sub_id: base_subid, filters: [get_base_filter()], to: to_relays, handler: handle_event)
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}
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func unsubscribe(to: String? = nil) {
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@ -29,7 +29,7 @@ class ZapsModel: ObservableObject {
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case .note(let note_target):
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filter.referenced_ids = [note_target.note_id]
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}
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state.pool.subscribe(sub_id: zaps_subid, filters: [filter], handler: handle_event)
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state.pool.subscribe_to(sub_id: zaps_subid, filters: [filter], handler: handle_event)
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}
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func unsubscribe() {
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@ -14,9 +14,15 @@ enum NostrConnectionEvent {
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}
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final class RelayConnection: WebSocketDelegate {
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private(set) var isConnected = false
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private(set) var isConnecting = false
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private(set) var isReconnecting = false
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enum State {
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case notConnected
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case connecting
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case reconnecting
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case connected
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case failed
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}
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private(set) var state: State = .notConnected
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private(set) var last_connection_attempt: TimeInterval = 0
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private lazy var socket = {
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@ -25,38 +31,36 @@ final class RelayConnection: WebSocketDelegate {
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socket.delegate = self
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return socket
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}()
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private var handleEvent: (NostrConnectionEvent) -> ()
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private let eventHandler: (NostrConnectionEvent) -> ()
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let url: URL
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init(url: URL, handleEvent: @escaping (NostrConnectionEvent) -> ()) {
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init(url: URL, eventHandler: @escaping (NostrConnectionEvent) -> ()) {
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self.url = url
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self.handleEvent = handleEvent
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self.eventHandler = eventHandler
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}
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func reconnect() {
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if isConnected {
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isReconnecting = true
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if state == .connected {
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state = .reconnecting
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disconnect()
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} else {
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// we're already disconnected, so just connect
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connect(force: true)
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connect()
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}
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}
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func connect(force: Bool = false) {
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if !force && (isConnected || isConnecting) {
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if !force && (state == .connected || state == .connecting) {
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return
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}
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isConnecting = true
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state = .connecting
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last_connection_attempt = Date().timeIntervalSince1970
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socket.connect()
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}
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func disconnect() {
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socket.disconnect()
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isConnected = false
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isConnecting = false
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}
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func send(_ req: NostrRequest) {
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@ -68,51 +72,52 @@ final class RelayConnection: WebSocketDelegate {
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socket.write(string: req)
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}
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private func decodeEvent(_ txt: String) throws -> NostrConnectionEvent {
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if let ev = decode_nostr_event(txt: txt) {
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return .nostr_event(ev)
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} else {
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throw DecodingError.dataCorrupted(.init(codingPath: [], debugDescription: "decoding event failed"))
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}
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}
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@MainActor
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private func handleEvent(_ event: NostrConnectionEvent) async {
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eventHandler(event)
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}
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// MARK: - WebSocketDelegate
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func didReceive(event: WebSocketEvent, client: WebSocket) {
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switch event {
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case .connected:
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self.isConnected = true
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self.isConnecting = false
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state = .connected
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case .disconnected:
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self.isConnecting = false
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self.isConnected = false
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if self.isReconnecting {
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self.isReconnecting = false
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self.connect()
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if state == .reconnecting {
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connect()
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} else {
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state = .notConnected
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}
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case .cancelled, .error:
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self.isConnecting = false
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self.isConnected = false
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state = .failed
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case .text(let txt):
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if txt.count > 2000 {
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DispatchQueue.global(qos: .default).async {
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if let ev = decode_nostr_event(txt: txt) {
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DispatchQueue.main.async {
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self.handleEvent(.nostr_event(ev))
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}
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return
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}
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}
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} else {
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if let ev = decode_nostr_event(txt: txt) {
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handleEvent(.nostr_event(ev))
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return
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Task(priority: .userInitiated) {
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do {
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let event = try decodeEvent(txt)
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await handleEvent(event)
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} catch {
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print("decode failed for \(txt): \(error)")
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// TODO: trigger event error
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}
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}
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print("decode failed for \(txt)")
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// TODO: trigger event error
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default:
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break
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}
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handleEvent(.ws_event(event))
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eventHandler(.ws_event(event))
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}
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}
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@ -7,22 +7,6 @@
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import Foundation
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struct SubscriptionId: Identifiable, CustomStringConvertible {
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let id: String
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var description: String {
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id
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}
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}
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struct RelayId: Identifiable, CustomStringConvertible {
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let id: String
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var description: String {
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id
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}
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}
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struct RelayHandler {
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let sub_id: String
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let callback: (String, NostrConnectionEvent) -> ()
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@ -33,22 +17,21 @@ struct QueuedRequest {
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let relay: String
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}
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struct NostrRequestId: Equatable, Hashable {
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let relay: String?
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let sub_id: String
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}
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class RelayPool {
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/// Used for an exponential backoff algorithm when retrying stale connections
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/// Each retry attempt will be delayed by raising this base delay to an exponent
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/// equal to the number of previous retries.
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private static let base_reconnect_delay: TimeInterval = 2
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final class RelayPool {
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private enum Constants {
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/// Used for an exponential backoff algorithm when retrying stale connections
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/// Each retry attempt will be delayed by raising this base delay to an exponent
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/// equal to the number of previous retries.
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static let base_reconnect_delay: TimeInterval = 2
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static let max_queued_requests = 10
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static let max_retry_attempts = 3
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}
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var relays: [Relay] = []
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var handlers: [RelayHandler] = []
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var request_queue: [QueuedRequest] = []
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var seen: Set<String> = Set()
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var counts: [String: UInt64] = [:]
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private(set) var relays: [Relay] = []
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private var handlers: [RelayHandler] = []
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private var request_queue: [QueuedRequest] = []
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private var seen: Set<String> = Set()
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private var counts: [String: UInt64] = [:]
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private var retry_attempts_per_relay: [URL: Int] = [:]
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var descriptors: [RelayDescriptor] {
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@ -56,37 +39,28 @@ class RelayPool {
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}
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var num_connecting: Int {
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return relays.reduce(0) { n, r in n + (r.connection.isConnecting ? 1 : 0) }
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relays.reduce(0) { n, r in n + (r.connection.state == .connecting ? 1 : 0) }
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}
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func remove_handler(sub_id: String) {
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private func remove_handler(sub_id: String) {
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self.handlers = handlers.filter { $0.sub_id != sub_id }
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print("removing \(sub_id) handler, current: \(handlers.count)")
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}
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func register_handler(sub_id: String, handler: @escaping (String, NostrConnectionEvent) -> ()) {
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for handler in handlers {
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// don't add duplicate handlers
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if handler.sub_id == sub_id {
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return
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}
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guard !handlers.contains(where: { $0.sub_id == sub_id }) else {
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return // don't add duplicate handlers
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}
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self.handlers.append(RelayHandler(sub_id: sub_id, callback: handler))
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handlers.append(RelayHandler(sub_id: sub_id, callback: handler))
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print("registering \(sub_id) handler, current: \(self.handlers.count)")
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}
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func remove_relay(_ relay_id: String) {
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var i: Int = 0
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disconnect(from: [relay_id])
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self.disconnect(to: [relay_id])
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for relay in relays {
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if relay.id == relay_id {
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relays.remove(at: i)
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break
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}
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i += 1
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if let index = relays.firstIndex(where: { $0.id == relay_id }) {
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relays.remove(at: index)
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}
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}
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@ -105,38 +79,51 @@ class RelayPool {
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/// This is used to retry dead connections
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func connect_to_disconnected() {
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for relay in relays where !relay.is_broken && !relay.connection.isConnected {
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for relay in relays where !relay.is_broken && relay.connection.state != .connected {
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let c = relay.connection
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let is_connecting = c.isReconnecting || c.isConnecting
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let is_connecting = c.state == .reconnecting || c.state == .connecting
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let retry_attempts = retry_attempts_per_relay[c.url] ?? 0
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let delay = pow(RelayPool.base_reconnect_delay, TimeInterval(retry_attempts_per_relay[c.url] ?? 0))
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let delay = pow(Constants.base_reconnect_delay, TimeInterval(retry_attempts + 1)) // the + 1 helps us avoid a 1-second delay for the first retry
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if is_connecting && (Date.now.timeIntervalSince1970 - c.last_connection_attempt) > delay {
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print("stale connection detected (\(relay.descriptor.url.absoluteString)). retrying after \(delay) seconds...")
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relay.connection.connect(force: true)
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retry_attempts_per_relay[c.url] = retry_attempts + 1
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if retry_attempts > Constants.max_retry_attempts {
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if c.state != .notConnected {
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c.disconnect()
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print("exceeded max connection attempts with \(relay.descriptor.url.absoluteString)")
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relay.mark_broken()
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}
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continue
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} else {
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print("stale connection detected (\(relay.descriptor.url.absoluteString)). retrying after \(delay) seconds...")
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c.connect(force: true)
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retry_attempts_per_relay[c.url] = retry_attempts + 1
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}
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} else if is_connecting {
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continue
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} else {
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relay.connection.reconnect()
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c.reconnect()
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}
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}
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}
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func reconnect(to: [String]? = nil) {
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let relays = to.map{ get_relays($0) } ?? self.relays
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for relay in relays {
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func reconnect(to relay_ids: [String]? = nil) {
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let relays: [Relay]
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if let relay_ids {
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relays = get_relays(relay_ids)
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} else {
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relays = self.relays
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}
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for relay in relays where !relay.is_broken {
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// don't try to reconnect to broken relays
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relay.connection.reconnect()
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}
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}
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func mark_broken(_ relay_id: String) {
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for relay in relays {
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relay.mark_broken()
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}
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relays.first(where: { $0.id == relay_id })?.mark_broken()
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}
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func connect(to: [String]? = nil) {
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@ -146,8 +133,8 @@ class RelayPool {
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}
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}
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func disconnect(to: [String]? = nil) {
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let relays = to.map{ get_relays($0) } ?? self.relays
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private func disconnect(from: [String]? = nil) {
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let relays = from.map{ get_relays($0) } ?? self.relays
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for relay in relays {
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relay.connection.disconnect()
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}
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@ -155,35 +142,23 @@ class RelayPool {
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func unsubscribe(sub_id: String, to: [String]? = nil) {
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if to == nil {
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self.remove_handler(sub_id: sub_id)
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remove_handler(sub_id: sub_id)
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}
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self.send(.unsubscribe(sub_id), to: to)
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send(.unsubscribe(sub_id), to: to)
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}
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func subscribe(sub_id: String, filters: [NostrFilter], handler: @escaping (String, NostrConnectionEvent) -> (), to: [String]? = nil) {
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func subscribe_to(sub_id: String, filters: [NostrFilter], to: [String]? = nil, handler: @escaping (String, NostrConnectionEvent) -> ()) {
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register_handler(sub_id: sub_id, handler: handler)
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send(.subscribe(.init(filters: filters, sub_id: sub_id)), to: to)
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}
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func subscribe_to(sub_id: String, filters: [NostrFilter], to: [String]?, handler: @escaping (String, NostrConnectionEvent) -> ()) {
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register_handler(sub_id: sub_id, handler: handler)
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send(.subscribe(.init(filters: filters, sub_id: sub_id)), to: to)
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}
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func count_queued(relay: String) -> Int {
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var c = 0
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for request in request_queue {
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if request.relay == relay {
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c += 1
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}
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}
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return c
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private func count_queued(relay: String) -> Int {
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request_queue.filter({ $0.relay == relay }).count
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}
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func queue_req(r: NostrRequest, relay: String) {
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let count = count_queued(relay: relay)
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guard count <= 10 else {
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guard count <= Constants.max_queued_requests else {
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print("can't queue, too many queued events for \(relay)")
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return
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}
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@ -193,10 +168,10 @@ class RelayPool {
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}
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func send(_ req: NostrRequest, to: [String]? = nil) {
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let relays = to.map{ get_relays($0) } ?? self.relays
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let relays = to.map { get_relays($0) } ?? self.relays
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for relay in relays {
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guard relay.connection.isConnected else {
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guard relay.connection.state == .connected else {
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queue_req(r: req, relay: relay.id)
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continue
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}
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@ -216,17 +191,14 @@ class RelayPool {
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func record_last_pong(relay_id: String, event: NostrConnectionEvent) {
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if case .ws_event(let ws_event) = event {
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if case .pong = ws_event {
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for relay in relays {
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if relay.id == relay_id {
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relay.last_pong = UInt32(Date.now.timeIntervalSince1970)
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return
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}
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if let relay = relays.first(where: { $0.id == relay_id }) {
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relay.last_pong = UInt32(Date.now.timeIntervalSince1970)
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}
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}
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}
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}
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func run_queue(_ relay_id: String) {
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private func run_queue(_ relay_id: String) {
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self.request_queue = request_queue.reduce(into: Array<QueuedRequest>()) { (q, req) in
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guard req.relay == relay_id else {
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q.append(req)
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@ -238,23 +210,20 @@ class RelayPool {
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}
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}
|
||||
|
||||
func record_seen(relay_id: String, event: NostrConnectionEvent) {
|
||||
private func record_seen(relay_id: String, event: NostrConnectionEvent) {
|
||||
if case .nostr_event(let ev) = event {
|
||||
if case .event(_, let nev) = ev {
|
||||
let k = relay_id + nev.id
|
||||
if !seen.contains(k) {
|
||||
seen.insert(k)
|
||||
if counts[relay_id] == nil {
|
||||
counts[relay_id] = 1
|
||||
} else {
|
||||
counts[relay_id] = (counts[relay_id] ?? 0) + 1
|
||||
}
|
||||
let prev_count = counts[relay_id] ?? 0
|
||||
counts[relay_id] = prev_count + 1
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func handle_event(relay_id: String, event: NostrConnectionEvent) {
|
||||
private func handle_event(relay_id: String, event: NostrConnectionEvent) {
|
||||
record_last_pong(relay_id: relay_id, event: event)
|
||||
record_seen(relay_id: relay_id, event: event)
|
||||
|
||||
@ -276,5 +245,3 @@ func add_rw_relay(_ pool: RelayPool, _ url: String) {
|
||||
let url_ = URL(string: url)!
|
||||
try? pool.add_relay(url_, info: RelayInfo.rw)
|
||||
}
|
||||
|
||||
|
||||
|
@ -7,6 +7,16 @@
|
||||
|
||||
import SwiftUI
|
||||
|
||||
extension RelayConnection.State {
|
||||
var indicatorColor: Color {
|
||||
switch self {
|
||||
case .connected: return .green
|
||||
case .connecting, .reconnecting: return .yellow
|
||||
default: return .red
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct RelayStatus: View {
|
||||
let pool: RelayPool
|
||||
let relay: String
|
||||
@ -16,18 +26,10 @@ struct RelayStatus: View {
|
||||
@State var conn_color: Color = .gray
|
||||
|
||||
func update_connection_color() {
|
||||
for relay in pool.relays {
|
||||
if relay.id == self.relay {
|
||||
let c = relay.connection
|
||||
if c.isConnected {
|
||||
conn_color = .green
|
||||
} else if c.isConnecting || c.isReconnecting {
|
||||
conn_color = .yellow
|
||||
} else {
|
||||
conn_color = .red
|
||||
}
|
||||
}
|
||||
guard let relay = pool.relays.first(where: { $0.id == relay }) else {
|
||||
return
|
||||
}
|
||||
conn_color = relay.connection.state.indicatorColor
|
||||
}
|
||||
|
||||
var body: some View {
|
||||
|
Loading…
Reference in New Issue
Block a user