ios: automatic message deletion (#1160)

apps/ios/Shared/Model/ChatModel.swift

@@ -32,6 +32,7 @@ final class ChatModel: ObservableObject {
     @Published var terminalItems: [TerminalItem] = []
     @Published var userAddress: String?
     @Published var userSMPServers: [String]?
+    @Published var chatItemTTL: ChatItemTTL = .none
     @Published var appOpenUrl: URL?
     @Published var deviceToken: DeviceToken?
     @Published var savedToken: DeviceToken?

apps/ios/Shared/Model/SimpleXAPI.swift

@@ -132,7 +132,7 @@ func apiCreateActiveUser(_ p: Profile) throws -> User {
 }
 
 func apiStartChat() throws -> Bool {
-    let r = chatSendCmdSync(.startChat(subscribe: true))
+    let r = chatSendCmdSync(.startChat(subscribe: true, expire: true))
     switch r {
     case .chatStarted: return true
     case .chatRunning: return false
@@ -319,6 +319,16 @@ func setUserSMPServers(smpServers: [String]) async throws {
     try await sendCommandOkResp(.setUserSMPServers(smpServers: smpServers))
 }
 
+func getChatItemTTL() throws -> ChatItemTTL {
+    let r = chatSendCmdSync(.apiGetChatItemTTL)
+    if case let .chatItemTTL(chatItemTTL) = r { return ChatItemTTL(chatItemTTL) }
+    throw r
+}
+
+func setChatItemTTL(_ chatItemTTL: ChatItemTTL) async throws {
+    try await sendCommandOkResp(.apiSetChatItemTTL(seconds: chatItemTTL.seconds))
+}
+
 func getNetworkConfig() async throws -> NetCfg? {
     let r = await chatSendCmd(.apiGetNetworkConfig)
     if case let .networkConfig(cfg) = r { return cfg }
@@ -757,6 +767,7 @@ func startChat() throws {
     if justStarted {
         m.userAddress = try apiGetUserAddress()
         m.userSMPServers = try getUserSMPServers()
+        m.chatItemTTL = try getChatItemTTL()
         let chats = try apiGetChats()
         m.chats = chats.map { Chat.init($0) }
         NtfManager.shared.setNtfBadgeCount(m.totalUnreadCount())