feat: added legacy to the ExpirationType enum in the protobuf and updated support

the desktop protobuf implementation doesnt support undefined for optional enum values this is a known bug.

protos/SignalService.proto

@@ -47,6 +47,7 @@ message MessageRequestResponse {
 message Content {
 
   enum ExpirationType {
+    LEGACY              = 0;
     DELETE_AFTER_READ   = 1;
     DELETE_AFTER_SEND   = 2;
   }

ts/receiver/contentMessage.ts

@@ -387,7 +387,7 @@ export async function innerHandleSwarmContentMessage(
       ConversationTypeEnum.PRIVATE
     );
 
-    // We need to make sure that we trigger the banner ui on the correct model for the conversation and not the author (for closed groups)
+    // We need to make sure that we trigger the outdated client banner ui on the correct model for the conversation and not the author (for closed groups)
     let conversationModelForUIUpdate = senderConversationModel;
 
     /**
@@ -416,13 +416,16 @@ export async function innerHandleSwarmContentMessage(
         'Disappearing Messages V2'
       );
 
-      const isLegacyConversationSettingMessage = Boolean(
-        !content.expirationTimer &&
-          dataMessage.flags === SignalService.DataMessage.Flags.EXPIRATION_TIMER_UPDATE
+      const isLegacy = Boolean(
+        (!content.expirationType && !content.expirationTimer) ||
+          content.expirationType === SignalService.Content.ExpirationType.LEGACY
       );
       const isLegacyMessage = Boolean(
-        (!content.expirationTimer && dataMessage.expireTimer && dataMessage.expireTimer > -1) ||
-          isLegacyConversationSettingMessage
+        isLegacy && dataMessage.expireTimer && dataMessage.expireTimer > -1
+      );
+      // NOTE When a legacy client sends a Conversation Setting Message dataMessage.expirationType and dataMessage.expireTimer can possibly be undefined.
+      const isLegacyConversationSettingMessage = Boolean(
+        isLegacy && dataMessage.flags === SignalService.DataMessage.Flags.EXPIRATION_TIMER_UPDATE
       );
 
       const expireTimer = isDisappearingMessagesV2Released
@@ -430,8 +433,9 @@ export async function innerHandleSwarmContentMessage(
         : isLegacyMessage
         ? Number(dataMessage.expireTimer)
         : 0;
+      // TODO legacy messages support will be removed in a future release
       const expirationType = isDisappearingMessagesV2Released
-        ? DisappearingMessageConversationSetting[content.expirationType]
+        ? DisappearingMessageConversationSetting[isLegacy ? 3 : content.expirationType]
         : isLegacyMessage && expireTimer > 0
         ? DisappearingMessageConversationSetting[3]
         : 'off';
@@ -455,7 +459,7 @@ export async function innerHandleSwarmContentMessage(
 
       if (conversationModelForUIUpdate.get('hasOutdatedClient')) {
         // trigger notice banner
-        if (isLegacyMessage) {
+        if (isLegacyMessage || isLegacyConversationSettingMessage) {
           if (conversationModelForUIUpdate.get('hasOutdatedClient') !== outdatedSender) {
             conversationModelForUIUpdate.set({
               hasOutdatedClient: outdatedSender,
@@ -468,7 +472,7 @@ export async function innerHandleSwarmContentMessage(
         }
         conversationModelForUIUpdate.commit();
       } else {
-        if (isLegacyMessage) {
+        if (isLegacyMessage || isLegacyConversationSettingMessage) {
           conversationModelForUIUpdate.set({
             hasOutdatedClient: outdatedSender,
           });

ts/session/messages/outgoing/DataMessage.ts

@@ -2,12 +2,14 @@ import { SignalService } from '../../../protobuf';
 import { ExpirableMessage } from './ExpirableMessage';
 
 export abstract class DataMessage extends ExpirableMessage {
-  public abstract dataProto(): SignalService.DataMessage;
-
   public contentProto(): SignalService.Content {
     return new SignalService.Content({
       ...super.contentProto(),
       dataMessage: this.dataProto(),
     });
   }
+
+  public dataProto(): SignalService.DataMessage {
+    return super.dataProto();
+  }
 }

ts/session/messages/outgoing/ExpirableMessage.ts

@@ -18,18 +18,20 @@ export class ExpirableMessage extends ContentMessage {
       timestamp: params.timestamp,
       identifier: params.identifier,
     });
-    // TODO legacy messages support will be removed in a future release
-    this.expirationType = params.expirationType !== 'legacy' ? params.expirationType : undefined;
+    this.expirationType = params.expirationType;
     this.expireTimer = params.expireTimer;
   }
 
   public contentProto(): SignalService.Content {
     return new SignalService.Content({
+      // TODO legacy messages support will be removed in a future release
       expirationType:
         this.expirationType === 'deleteAfterSend'
           ? SignalService.Content.ExpirationType.DELETE_AFTER_SEND
           : this.expirationType === 'deleteAfterRead'
           ? SignalService.Content.ExpirationType.DELETE_AFTER_READ
+          : this.expirationType === 'legacy'
+          ? SignalService.Content.ExpirationType.LEGACY
           : undefined,
       expirationTimer: this.expireTimer && this.expireTimer > -1 ? this.expireTimer : undefined,
     });
@@ -38,7 +40,10 @@ export class ExpirableMessage extends ContentMessage {
   public dataProto(): SignalService.DataMessage {
     return new SignalService.DataMessage({
       // TODO legacy messages support will be removed in a future release
-      expireTimer: !this.expirationType && this.expireTimer ? this.expireTimer : undefined,
+      expireTimer:
+        (!this.expirationType || this.expirationType === 'legacy') && this.expireTimer
+          ? this.expireTimer
+          : undefined,
     });
   }
 

ts/session/messages/outgoing/controlMessage/ExpirationTimerUpdateMessage.ts

@@ -42,7 +42,7 @@ export class ExpirationTimerUpdateMessage extends DataMessage {
   }
 
   public dataProto(): SignalService.DataMessage {
-    const data = new SignalService.DataMessage();
+    const data = super.dataProto();
 
     data.flags = SignalService.DataMessage.Flags.EXPIRATION_TIMER_UPDATE;
 

ts/session/messages/outgoing/controlMessage/group/ClosedGroupMessage.ts

@@ -31,16 +31,19 @@ export abstract class ClosedGroupMessage extends ExpirableMessage {
     return new SignalService.Content({
       dataMessage: this.dataProto(),
       ...super.contentProto(),
-      // Closed Groups only support 'deleteAfterSend'
+      // TODO legacy messages support will be removed in a future release
+      // Closed Groups only support 'deleteAfterSend' and 'legacy'
       expirationType:
         this.expirationType === 'deleteAfterSend'
           ? SignalService.Content.ExpirationType.DELETE_AFTER_SEND
+          : !this.expirationType || this.expirationType === 'legacy'
+          ? SignalService.Content.ExpirationType.LEGACY
           : undefined,
     });
   }
 
   public dataProto(): SignalService.DataMessage {
-    const dataMessage = new SignalService.DataMessage();
+    const dataMessage = super.dataProto();
 
     dataMessage.closedGroupControlMessage = new SignalService.DataMessage.ClosedGroupControlMessage();
 

ts/session/messages/outgoing/visibleMessage/VisibleMessage.ts

@@ -114,7 +114,7 @@ export class VisibleMessage extends ExpirableMessage {
   }
 
   public dataProto(): SignalService.DataMessage {
-    const dataMessage = new SignalService.DataMessage();
+    const dataMessage = super.dataProto();
 
     if (this.body) {
       dataMessage.body = this.body;

ts/util/expiringMessages.ts

@@ -10,9 +10,11 @@ import { getConversationController } from '../session/conversations';
 import { getNowWithNetworkOffset } from '../session/apis/snode_api/SNodeAPI';
 
 // TODO Might need to be improved by using an enum
+// TODO do we need to add legacy here now that it's explicitly in the protbuf?
 export const DisappearingMessageMode = ['deleteAfterRead', 'deleteAfterSend'];
 export type DisappearingMessageType = typeof DisappearingMessageMode[number] | null;
 
+// TODO legacy messages support will be removed in a future release
 export const DisappearingMessageConversationSetting = ['off', ...DisappearingMessageMode, 'legacy'];
 export type DisappearingMessageConversationType = typeof DisappearingMessageConversationSetting[number];
 export const DEFAULT_TIMER_OPTION = {