SearchHomeView working

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

damus/Models/SearchHomeModel.swift

@@ -0,0 +1,60 @@
+//
+//  SearchHomeModel.swift
+//  damus
+//
+//  Created by William Casarin on 2022-06-06.
+//
+
+import Foundation
+
+
+/// The data model for the SearchHome view, typically something global-like
+class SearchHomeModel: ObservableObject {
+    @Published var events: [NostrEvent] = []
+    let pool: RelayPool
+    let sub_id = UUID().description
+    let limit: UInt32 = 1000
+    
+    init(pool: RelayPool) {
+        self.pool = pool
+    }
+    
+    func get_base_filter() -> NostrFilter {
+        var filter = NostrFilter.filter_text
+        filter.limit = self.limit
+        filter.until = Int64(Date.now.timeIntervalSince1970)
+        return filter
+    }
+    
+    func subscribe() {
+        pool.subscribe(sub_id: sub_id, filters: [get_base_filter()], handler: handle_event)
+    }
+
+    func unsubscribe() {
+        pool.unsubscribe(sub_id: sub_id)
+    }
+    
+    func handle_event(relay_id: String, conn_ev: NostrConnectionEvent) {
+        switch conn_ev {
+        case .ws_event:
+            break
+        case .nostr_event(let event):
+            switch event {
+            case .event(let sub_id, let ev):
+                guard sub_id == self.sub_id else {
+                    return
+                }
+                guard self.events.count <= limit else {
+                    return
+                }
+                if ev.kind == NostrKind.text.rawValue {
+                    let _ = insert_uniq_sorted_event(events: &events, new_ev: ev) {
+                        $0.created_at > $1.created_at
+                    }
+                }
+            case .notice(let msg):
+                print("search home notice: \(msg)")
+            }
+        }
+    }
+}