insert sort, profile updates revamp

Signed-off-by: William Casarin <jb55@jb55.com>

damus/Models/SearchModel.swift

@@ -0,0 +1,74 @@
+//
+//  Timeline.swift
+//  damus
+//
+//  Created by William Casarin on 2022-05-09.
+//
+
+import Foundation
+
+
+class SearchModel: ObservableObject {
+    @Published var events: [NostrEvent] = []
+    let pool: RelayPool
+    let search: NostrFilter
+    let sub_id = UUID().description
+    
+    init(pool: RelayPool, search: NostrFilter) {
+        self.pool = pool
+        self.search = search
+    }
+    
+    func subscribe() {
+        // since 2 month
+        var filter = NostrFilter.copy(from: search)
+        filter.since = Int64(Date.now.timeIntervalSince1970) - 2629800 * 2
+
+        //likes_filter.ids = ref_events.referenced_ids!
+
+        print("subscribing to search '\(filter)' with sub_id \(sub_id)")
+        pool.register_handler(sub_id: sub_id, handler: handle_event)
+        pool.send(.subscribe(.init(filters: [filter], sub_id: sub_id)))
+    }
+    
+    func unsubscribe() {
+        self.pool.unsubscribe(sub_id: sub_id)
+        print("unsubscribing from search '\(search)' with sub_id \(sub_id)")
+    }
+    
+    func add_event(_ ev: NostrEvent) {
+        if insert_uniq_sorted_event(events: &self.events, new_ev: ev) {
+            objectWillChange.send()
+        }
+    }
+    
+    func handle_event(relay_id: String, ev: NostrConnectionEvent) {
+        handle_subid_event(pool: pool, sub_id: sub_id, relay_id: relay_id, ev: ev) { ev in
+            if ev.known_kind == .text {
+                self.add_event(ev)
+            }
+        }
+    }
+}
+
+
+func handle_subid_event(pool: RelayPool, sub_id: String, relay_id: String, ev: NostrConnectionEvent, handle: (NostrEvent) -> ()) {
+        switch ev {
+        case .ws_event:
+            break
+        case .nostr_event(let res):
+            switch res {
+            case .event(let ev_subid, let ev):
+                if ev_subid == sub_id {
+                    handle(ev)
+                }
+
+            case .notice(let note):
+                if note.contains("Too many subscription filters") {
+                    // TODO: resend filters?
+                    pool.reconnect(to: [relay_id])
+                }
+                break
+            }
+        }
+}