Match pending sends by a send id the server echoes

mac/Sources/Byre/Store.swift

@@ -88,6 +88,7 @@ final class Store {
     @ObservationIgnored private var leadStream: EventStream?
     @ObservationIgnored private var stopped = false
     @ObservationIgnored var changesMemory = ChangesMemory()
+    @ObservationIgnored private var localSends: [String: LocalSends] = [:]
 
     init(api: API, images: ImageDrafts, forwards: Forwards) {
         self.api = api
@@ -98,6 +99,22 @@ final class Store {
         remote = Remote(api: api)
     }
 
+    func sends(_ key: String) -> LocalSends {
+        if let sends = localSends[key] {
+            return sends
+        }
+        let sends = LocalSends()
+        localSends[key] = sends
+        return sends
+    }
+
+    private func confirmSend(_ key: String, _ ev: ByreEvent) {
+        guard ev.kind == "user.queued" || ev.kind == "user.message", let sendID = str(ev.payload.value, "send_id") else {
+            return
+        }
+        localSends[key]?.items.removeAll { $0.sendID == sendID }
+    }
+
     func stop() async {
         stopped = true
         globalStream?.stop()
@@ -569,6 +586,7 @@ final class Store {
         leadMore = page.more
         leadStream = EventStream(api: api, after: page.events.last?.seq ?? 0, lead: true, onEvent: { [weak self] ev in
             self?.leadFeed.push(ev)
+            self?.confirmSend("lead", ev)
         }, onState: { _ in }, onReady: { [weak self] in
             self?.leadFeed.load(page.events)
         })
@@ -603,6 +621,7 @@ final class Store {
     func handleEvent(_ ev: ByreEvent) {
         if let taskId = ev.taskId {
             taskFeeds[taskId]?.push(ev)
+            confirmSend(taskId, ev)
         }
         if ev.seq == 0 {
             events.send(ev)