Merge pull request #467 from xmtp/noe/ios-db-disconnect

Drop / reconnect database connections when app becomes backgrounded/active

ios/XMTPModule.swift

@@ -48,16 +48,36 @@ public class XMTPModule: Module {
 	actor ClientsManager {
 		private var clients: [String: XMTP.Client] = [:]
 
-		// A method to update the conversations
+		// A method to update the client
 		func updateClient(key: String, client: XMTP.Client) {
 			ContentJson.initCodecs(client: client)
 			clients[key] = client
 		}
 
-		// A method to retrieve a conversation
+		// A method to retrieve a client
 		func getClient(key: String) -> XMTP.Client? {
 			return clients[key]
 		}
+
+		// A method to disconnect all dbs
+		func dropAllLocalDatabaseConnections() throws {
+			for (_, client) in clients {
+				// Call the drop method on each v3 client
+				if (!client.installationID.isEmpty) {
+					try client.dropLocalDatabaseConnection()
+				}
+			}
+		}
+
+		// A method to reconnect all dbs
+		func reconnectAllLocalDatabaseConnections() async throws {
+			for (_, client) in clients {
+				// Call the reconnect method on each v3 client
+				if (!client.installationID.isEmpty) {
+					try await client.reconnectLocalDatabase()
+				}
+			}
+		}
 	}
 
 	enum Error: Swift.Error {
@@ -1475,6 +1495,19 @@ public class XMTPModule: Module {
 
 			return logOutput
 		}
+
+		OnAppBecomesActive {
+			Task {
+				try await clientsManager.reconnectAllLocalDatabaseConnections()
+			}
+		}
+
+
+		OnAppEntersBackground {
+			Task {
+				try await clientsManager.dropAllLocalDatabaseConnections()
+			}
+		}
 	}
 
 	//