wip some initial relay bootstrap logic

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

damus/ContentView.swift

@@ -8,6 +8,13 @@
 import SwiftUI
 import Starscream
 
+let BOOTSTRAP_RELAYS = [
+    "wss://relay.damus.io",
+    "wss://nostr-pub.wellorder.net",
+    "wss://nostr-relay.freeberty.net",
+    "wss://nostr-relay.untethr.me",
+]
+
 struct TimestampedProfile {
     let profile: Profile
     let timestamp: Int64
@@ -327,14 +334,11 @@ struct ContentView: View {
 
     func connect() {
         let pool = RelayPool()
-
-        add_relay(pool, "wss://relay.damus.io")
-        //add_relay(pool, "wss://nostr-pub.wellorder.net")
-        //add_relay(pool, "wss://nostr.bitcoiner.social")
-        //add_relay(pool, "ws://monad.jb55.com:8080")
-        //add_relay(pool, "wss://nostr-relay.freeberty.net")
-        //add_relay(pool, "wss://nostr-relay.untethr.me")
-
+        
+        for relay in BOOTSTRAP_RELAYS {
+            add_relay(pool, relay)
+        }
+        
         pool.register_handler(sub_id: sub_id, handler: home.handle_event)
 
         self.damus_state = DamusState(pool: pool, keypair: keypair,

damus/Models/HomeModel.swift

@@ -142,7 +142,7 @@ class HomeModel: ObservableObject {
                     self.loading = true
                     send_initial_filters(relay_id: relay_id)
                 } else {
-                    self.loading = true
+                    //remove_bootstrap_nodes(damus_state)
                     send_home_filters(relay_id: relay_id)
                 }
             case .error(let merr):
@@ -425,3 +425,27 @@ func load_our_relays(our_pubkey: String, pool: RelayPool, ev: NostrEvent) {
         }
     }
 }
+
+
+func remove_bootstrap_nodes(_ damus_state: DamusState) {
+    guard let contacts = damus_state.contacts.event else {
+        return
+    }
+    
+    guard let relays = decode_json_relays(contacts.content) else {
+        return
+    }
+    
+    let descriptors = relays.reduce(into: []) { arr, kv in
+        guard let url = URL(string: kv.key) else {
+            return
+        }
+        arr.append(RelayDescriptor(url: url, info: kv.value))
+    }
+
+    for relay in BOOTSTRAP_RELAYS {
+        if !(descriptors.contains { ($0 as! RelayDescriptor).url.absoluteString == relay }) {
+            damus_state.pool.remove_relay(relay)
+        }
+    }
+}

damus/Models/LocalUserConfig.swift

@@ -0,0 +1,14 @@
+//
+//  LocalUserConfig.swift
+//  damus
+//
+//  Created by William Casarin on 2022-06-15.
+//
+
+import Foundation
+
+
+struct LocalUserConfig: Codable {
+    let relays: [RelayDescriptor]
+}
+

damus/Nostr/Relay.swift

@@ -14,7 +14,7 @@ struct RelayInfo: Codable {
     static let rw = RelayInfo(read: true, write: true)
 }
 
-struct RelayDescriptor {
+struct RelayDescriptor: Codable {
     let url: URL
     let info: RelayInfo
 }

damus/Nostr/RelayPool.swift

@@ -45,9 +45,25 @@ class RelayPool {
     }
 
     func register_handler(sub_id: String, handler: @escaping (String, NostrConnectionEvent) -> ()) {
+        
         self.handlers.append(RelayHandler(sub_id: sub_id, callback: handler))
     }
-
+    
+    func remove_relay(_ relay_id: String) {
+        var i: Int = 0
+        
+        self.disconnect(to: [relay_id])
+        
+        for relay in relays {
+            if relay.id == relay_id {
+                relays.remove(at: i)
+                break
+            }
+            
+            i += 1
+        }
+    }
+    
     func add_relay(_ url: URL, info: RelayInfo) throws {
         let relay_id = get_relay_id(url)
         if get_relay(relay_id) != nil {