Add saved drafts to posts, replies, and DMs

Changelog-Added: Save drafts to posts, replies and DMs
Closes: #582

damus/Models/DamusState.swift

@@ -23,6 +23,7 @@ struct DamusState {
     let settings: UserSettingsStore
     let relay_filters: RelayFilters
     let relay_metadata: RelayMetadatas
+    let drafts_model: DraftsModel
     
     var pubkey: String {
         return keypair.pubkey
@@ -34,6 +35,6 @@ struct DamusState {
 
     
     static var empty: DamusState {
-        return DamusState.init(pool: RelayPool(), keypair: Keypair(pubkey: "", privkey: ""), likes: EventCounter(our_pubkey: ""), boosts: EventCounter(our_pubkey: ""), contacts: Contacts(our_pubkey: ""), tips: TipCounter(our_pubkey: ""), profiles: Profiles(), dms: DirectMessagesModel(our_pubkey: ""), previews: PreviewCache(), zaps: Zaps(our_pubkey: ""), lnurls: LNUrls(), settings: UserSettingsStore(), relay_filters: RelayFilters(our_pubkey: ""), relay_metadata: RelayMetadatas())
+        return DamusState.init(pool: RelayPool(), keypair: Keypair(pubkey: "", privkey: ""), likes: EventCounter(our_pubkey: ""), boosts: EventCounter(our_pubkey: ""), contacts: Contacts(our_pubkey: ""), tips: TipCounter(our_pubkey: ""), profiles: Profiles(), dms: DirectMessagesModel(our_pubkey: ""), previews: PreviewCache(), zaps: Zaps(our_pubkey: ""), lnurls: LNUrls(), settings: UserSettingsStore(), relay_filters: RelayFilters(our_pubkey: ""), relay_metadata: RelayMetadatas(), drafts_model: DraftsModel())
     }
 }

damus/Models/DirectMessageModel.swift

@@ -13,6 +13,8 @@ class DirectMessageModel: ObservableObject {
             is_request = determine_is_request()
         }
     }
+
+    @Published var draft: String
     
     var is_request: Bool
     var our_pubkey: String
@@ -31,11 +33,13 @@ class DirectMessageModel: ObservableObject {
         self.events = events
         self.is_request = false
         self.our_pubkey = our_pubkey
+        self.draft = ""
     }
     
     init(our_pubkey: String) {
         self.events = []
         self.is_request = false
         self.our_pubkey = our_pubkey
+        self.draft = ""
     }
 }

damus/Models/DraftsModel.swift

@@ -0,0 +1,13 @@
+//
+//  DraftsModel.swift
+//  damus
+//
+//  Created by Terry Yiu on 2/12/23.
+//
+
+import Foundation
+
+class DraftsModel: ObservableObject {
+    @Published var post: String = ""
+    @Published var replies = Dictionary<NostrEvent, String>()
+}

damus/Models/HomeModel.swift

@@ -52,15 +52,18 @@ class HomeModel: ObservableObject {
     @Published var events: [NostrEvent] = []
     @Published var loading: Bool = false
     @Published var signal: SignalModel = SignalModel()
+    @Published var drafts_model: DraftsModel
 
     init() {
         self.damus_state = DamusState.empty
         self.dms = DirectMessagesModel(our_pubkey: damus_state.pubkey)
+        self.drafts_model = DraftsModel()
     }
 
     init(damus_state: DamusState) {
         self.damus_state = damus_state
         self.dms = DirectMessagesModel(our_pubkey: damus_state.pubkey)
+        self.drafts_model = DraftsModel()
     }
 
     var pool: RelayPool {