nwc: Add WalletModel

This model will be used for controlling the logic in the Wallet views

damus.xcodeproj/project.pbxproj

@@ -144,6 +144,7 @@
 		4C7D09722A0AEF5E00943473 /* DamusGradient.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C7D09712A0AEF5E00943473 /* DamusGradient.swift */; };
 		4C7D09742A0AEF9000943473 /* AlbyGradient.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C7D09732A0AEF9000943473 /* AlbyGradient.swift */; };
 		4C7D09762A0AF19E00943473 /* FillAndStroke.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C7D09752A0AF19E00943473 /* FillAndStroke.swift */; };
+		4C7D09782A0B0CC900943473 /* WalletModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C7D09772A0B0CC900943473 /* WalletModel.swift */; };
 		4C7FF7D52823313F009601DB /* Mentions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C7FF7D42823313F009601DB /* Mentions.swift */; };
 		4C8682872814DE470026224F /* ProfileView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C8682862814DE470026224F /* ProfileView.swift */; };
 		4C8D00C829DF791C0036AF10 /* CompatibleAttribute.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C8D00C729DF791C0036AF10 /* CompatibleAttribute.swift */; };
@@ -559,6 +560,7 @@
 		4C7D09712A0AEF5E00943473 /* DamusGradient.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DamusGradient.swift; sourceTree = "<group>"; };
 		4C7D09732A0AEF9000943473 /* AlbyGradient.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AlbyGradient.swift; sourceTree = "<group>"; };
 		4C7D09752A0AF19E00943473 /* FillAndStroke.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FillAndStroke.swift; sourceTree = "<group>"; };
+		4C7D09772A0B0CC900943473 /* WalletModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WalletModel.swift; sourceTree = "<group>"; };
 		4C7FF7D42823313F009601DB /* Mentions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Mentions.swift; sourceTree = "<group>"; };
 		4C8682862814DE470026224F /* ProfileView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProfileView.swift; sourceTree = "<group>"; };
 		4C8D00C729DF791C0036AF10 /* CompatibleAttribute.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CompatibleAttribute.swift; sourceTree = "<group>"; };
@@ -862,6 +864,7 @@
 				4C54AA0629A540BA003E4487 /* NotificationsModel.swift */,
 				4CD348EE29C3659D00497EB2 /* ImageUploadModel.swift */,
 				3A48E7AF29DFBE9D006E787E /* MutedThreadsManager.swift */,
+				4C7D09772A0B0CC900943473 /* WalletModel.swift */,
 			);
 			path = Models;
 			sourceTree = "<group>";
@@ -1687,6 +1690,7 @@
 				9609F058296E220800069BF3 /* BannerImageView.swift in Sources */,
 				4C363A94282704FA006E126D /* Post.swift in Sources */,
 				4C216F32286E388800040376 /* DMChatView.swift in Sources */,
+				4C7D09782A0B0CC900943473 /* WalletModel.swift in Sources */,
 				4C7D09662A0AE62100943473 /* AlbyButton.swift in Sources */,
 				4CAAD8AD298851D000060CEA /* AccountDeletion.swift in Sources */,
 				4CFF8F6329CC9AD7008DB934 /* ImageContextMenuModifier.swift in Sources */,

damus/Models/WalletModel.swift

@@ -0,0 +1,59 @@
+//
+//  WalletModel.swift
+//  damus
+//
+//  Created by William Casarin on 2023-05-09.
+//
+
+import Foundation
+
+enum WalletConnectState {
+    case new(WalletConnectURL)
+    case existing(WalletConnectURL)
+    case none
+}
+
+class WalletModel: ObservableObject {
+    let settings: UserSettingsStore?
+    private(set) var previous_state: WalletConnectState
+    @Published private(set) var connect_state: WalletConnectState
+    
+    init() {
+        self.connect_state = .none
+        self.previous_state = .none
+        self.settings = nil
+    }
+    
+    init(settings: UserSettingsStore) {
+        self.settings = settings
+        if let str = settings.nostr_wallet_connect,
+           let nwc = WalletConnectURL(str: str) {
+            self.previous_state = .existing(nwc)
+            self.connect_state = .existing(nwc)
+        } else {
+            self.previous_state = .none
+            self.connect_state = .none
+        }
+    }
+    
+    func cancel() {
+        self.connect_state = previous_state
+        self.objectWillChange.send()
+    }
+    
+    func disconnect() {
+        self.settings?.nostr_wallet_connect = nil
+        self.connect_state = .none
+        self.previous_state = .none
+    }
+    
+    func new(_ nwc: WalletConnectURL) {
+        self.connect_state = .new(nwc)
+    }
+    
+    func connect(_ nwc: WalletConnectURL) {
+        self.settings?.nostr_wallet_connect = nwc.to_url().absoluteString
+        self.connect_state = .existing(nwc)
+        self.previous_state = .existing(nwc)
+    }
+}