Add DM button to profile

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

damus/Models/DamusState.swift

@@ -16,12 +16,13 @@ struct DamusState {
     let tips: TipCounter
     let image_cache: ImageCache
     let profiles: Profiles
+    let dms: DirectMessagesModel
     
     var pubkey: String {
         return keypair.pubkey
     }
     
     static var empty: DamusState {
-        return DamusState.init(pool: RelayPool(), keypair: Keypair(pubkey: "", privkey: ""), likes: EventCounter(our_pubkey: ""), boosts: EventCounter(our_pubkey: ""), contacts: Contacts(), tips: TipCounter(our_pubkey: ""), image_cache: ImageCache(), profiles: Profiles())
+        return DamusState.init(pool: RelayPool(), keypair: Keypair(pubkey: "", privkey: ""), likes: EventCounter(our_pubkey: ""), boosts: EventCounter(our_pubkey: ""), contacts: Contacts(), tips: TipCounter(our_pubkey: ""), image_cache: ImageCache(), profiles: Profiles(), dms: DirectMessagesModel())
     }
 }

damus/Models/DirectMessageModel.swift

@@ -0,0 +1,20 @@
+//
+//  DirectMessageModel.swift
+//  damus
+//
+//  Created by William Casarin on 2022-07-03.
+//
+
+import Foundation
+
+class DirectMessageModel: ObservableObject {
+    @Published var events: [NostrEvent]
+    
+    init(events: [NostrEvent]) {
+        self.events = events
+    }
+    
+    init() {
+        self.events = []
+    }
+}

damus/Models/DirectMessagesModel.swift

@@ -8,8 +8,26 @@
 import Foundation
 
 class DirectMessagesModel: ObservableObject {
-    @Published var events: [(String, [NostrEvent])] = []
+    @Published var dms: [(String, DirectMessageModel)] = []
     @Published var loading: Bool = false
     
+    func lookup_or_create(_ pubkey: String) -> DirectMessageModel {
+        if let dm = lookup(pubkey) {
+            return dm
+        }
+        
+        let new = DirectMessageModel()
+        dms.append((pubkey, new))
+        return new
+    }
     
+    func lookup(_ pubkey: String) -> DirectMessageModel? {
+        for dm in dms {
+            if pubkey == dm.0 {
+                return dm.1
+            }
+        }
+        
+        return nil
+    }
 }

damus/Models/HomeModel.swift

@@ -44,7 +44,7 @@ class HomeModel: ObservableObject {
 
     @Published var new_events: NewEventsBits = NewEventsBits()
     @Published var notifications: [NostrEvent] = []
-    @Published var dms: [(String, [NostrEvent])] = []
+    @Published var dms: DirectMessagesModel = DirectMessagesModel()
     @Published var events: [NostrEvent] = []
     @Published var loading: Bool = false
     @Published var signal: SignalModel = SignalModel()
@@ -372,10 +372,10 @@ class HomeModel: ObservableObject {
             }
         }
 
-        for (pk, _) in dms {
+        for (pk, _) in dms.dms {
             if pk == the_pk {
                 found = true
-                inserted = insert_uniq_sorted_event(events: &(dms[i].1), new_ev: ev) {
+                inserted = insert_uniq_sorted_event(events: &(dms.dms[i].1.events), new_ev: ev) {
                     $0.created_at < $1.created_at
                 }
 
@@ -386,14 +386,18 @@ class HomeModel: ObservableObject {
 
         if !found {
             inserted = true
-            dms.append((the_pk, [ev]))
+            let model = DirectMessageModel(events: [ev])
+            dms.dms.append((the_pk, model))
         }
 
         if inserted {
             handle_last_event(ev: ev, timeline: .dms)
 
-            dms = dms.sorted { a, b in
-                a.1.last!.created_at > b.1.last!.created_at
+            dms.dms = dms.dms.sorted { a, b in
+                if a.1.events.count > 0 && b.1.events.count > 0 {
+                    return a.1.events.last!.created_at > b.1.events.last!.created_at
+                }
+                return true
             }
         }
     }