Clean up TTL settings

SignalServiceKit/src/Loki/Protocol/Message Types/TTLUtilities.swift

@@ -3,40 +3,30 @@
 public final class TTLUtilities : NSObject {
 
     /// If a message type specifies an invalid TTL, this will be used.
-    public static let fallbackMessageTTL: UInt64 = 4 * 24 * 60 * 60 * 1000
+    public static let fallbackMessageTTL: UInt64 = 2 * kDayInMs
 
     @objc(LKMessageType)
     public enum MessageType : Int {
-        case address
+        // Unimportant control messages
-        case call
+        case call, typingIndicator
-        case disappearingMessagesConfiguration
+        // Somewhat important control messages
-        case ephemeral
-        case friendRequest
         case linkDevice
-        case profileKey
+        // Important control messages
-        case receipt
+        case disappearingMessagesConfiguration, ephemeral, profileKey, receipt, sessionRequest, sync, unlinkDevice
-        case regular
+        // Visible messages
-        case sessionRequest
+        case friendRequest, regular
-        case sync
-        case typingIndicator
-        case unlinkDevice
     }
 
     @objc public static func getTTL(for messageType: MessageType) -> UInt64 {
         switch messageType {
-        case .address: return 1 * kMinuteInMs
+        // Unimportant control messages
-        case .call: return 1 * kMinuteInMs
+        case .call, .typingIndicator: return 1 * kMinuteInMs
-        case .disappearingMessagesConfiguration: return 4 * kDayInMs - 1 * kHourInMs
+        // Somewhat important control messages
-        case .ephemeral: return 4 * kDayInMs - 1 * kHourInMs
+        case .linkDevice: return 1 * kHourInMs
-        case .friendRequest: return 4 * kDayInMs
+        // Important control messages
-        case .linkDevice: return 4 * kMinuteInMs
+        case .disappearingMessagesConfiguration, .ephemeral, .profileKey, .receipt, .sessionRequest, .sync, .unlinkDevice: return 2 * kDayInMs - 1 * kHourInMs
-        case .profileKey: return 4 * kDayInMs - 1 * kHourInMs
+        // Visible messages
-        case .receipt: return 4 * kDayInMs - 1 * kHourInMs
+        case .friendRequest, .regular: return 2 * kDayInMs
-        case .regular: return 2 * kDayInMs
-        case .sessionRequest: return 4 * kDayInMs - 1 * kHourInMs
-        case .sync: return 4 * kDayInMs - 1 * kHourInMs
-        case .typingIndicator: return 1 * kMinuteInMs
-        case .unlinkDevice: return 4 * kDayInMs - 1 * kHourInMs
         }
     }
 }