Remove legacy Error backdating - no changes in functionality

Historically we would backdate the SN change messages, but since adopting
non-blocking SN changes long ago, they're already sorted properly by creation
time, so backdating has been unnecessary for a while.

I also audited that all other error messages are saved directly after creation.

I applied deprecation attributes as appropriate as I audited.

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -1890,7 +1890,11 @@ typedef enum : NSUInteger {
                                    // DEPRECATED: we're no longer creating these incoming SN error's per message,
                                    // but there will be some legacy ones in the wild, behind which await
                                    // as-of-yet-undecrypted messages
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
                                    if ([errorMessage isKindOfClass:[TSInvalidIdentityKeyReceivingErrorMessage class]]) {
+#pragma clang diagnostic pop
+
                                        [errorMessage acceptNewIdentityKey];
                                    }
                                }];

Signal/src/ViewControllers/DebugUI/DebugUIMessages.m

@@ -3598,11 +3598,14 @@ typedef OWSContact * (^OWSContactBlock)(YapDatabaseReadWriteTransaction *transac
                                                      withTransaction:transaction]];
         [result addObject:[TSErrorMessage corruptedMessageWithEnvelope:[self createEnvelopeForThread:thread]
                                                        withTransaction:transaction]];
-        
-        
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
         TSInvalidIdentityKeyReceivingErrorMessage *_Nullable blockingSNChangeMessage =
             [TSInvalidIdentityKeyReceivingErrorMessage untrustedKeyWithEnvelope:[self createEnvelopeForThread:thread]
                                                                 withTransaction:transaction];
+#pragma clang diagnostic pop
+
         OWSAssertDebug(blockingSNChangeMessage);
         [result addObject:blockingSNChangeMessage];
         // MJK TODO - should be safe to remove this senderTimestamp

SignalMessaging/Models/OWSContactOffersInteraction.h

@@ -22,7 +22,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (instancetype)initWithCoder:(NSCoder *)coder NS_DESIGNATED_INITIALIZER;
 
-// MJK TODO Remove this timestamp param?
+// MJK TODO should be safe to remove this timestamp param
 - (instancetype)initContactOffersWithSenderTimestamp:(uint64_t)timestamp
                                               thread:(TSThread *)thread
                                        hasBlockOffer:(BOOL)hasBlockOffer

SignalMessaging/Models/TSUnreadIndicatorInteraction.h

@@ -7,6 +7,7 @@
 NS_ASSUME_NONNULL_BEGIN
 
 // This class is vestigial.
+__attribute__((deprecated))
 @interface TSUnreadIndicatorInteraction : TSInteraction
 
 - (instancetype)initWithCoder:(NSCoder *)coder NS_DESIGNATED_INITIALIZER;

SignalMessaging/Models/TSUnreadIndicatorInteraction.m

@@ -6,7 +6,10 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
 @implementation TSUnreadIndicatorInteraction
+#pragma clang diagnostic pop
 
 - (instancetype)initWithCoder:(NSCoder *)coder
 {

SignalMessaging/SignalMessaging.h

@@ -49,7 +49,6 @@ FOUNDATION_EXPORT const unsigned char SignalMessagingVersionString[];
 #import <SignalMessaging/SelectRecipientViewController.h>
 #import <SignalMessaging/SharingThreadPickerViewController.h>
 #import <SignalMessaging/SignalKeyingStorage.h>
-#import <SignalMessaging/TSUnreadIndicatorInteraction.h>
 #import <SignalMessaging/Theme.h>
 #import <SignalMessaging/ThreadUtil.h>
 #import <SignalMessaging/ThreadViewHelper.h>

SignalMessaging/utils/ThreadUtil.m

@@ -305,20 +305,31 @@ NS_ASSUME_NONNULL_BEGIN
             enumerateRowsInGroup:thread.uniqueId
                       usingBlock:^(
                           NSString *collection, NSString *key, id object, id metadata, NSUInteger index, BOOL *stop) {
-
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
                           if ([object isKindOfClass:[OWSUnknownContactBlockOfferMessage class]]) {
+#pragma clang diagnostic pop
                               // Delete this legacy interactions, which has been superseded by
                               // the OWSContactOffersInteraction.
                               [interactionsToDelete addObject:object];
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
                           } else if ([object isKindOfClass:[OWSAddToContactsOfferMessage class]]) {
+#pragma clang diagnostic pop
                               // Delete this legacy interactions, which has been superseded by
                               // the OWSContactOffersInteraction.
                               [interactionsToDelete addObject:object];
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
                           } else if ([object isKindOfClass:[OWSAddToProfileWhitelistOfferMessage class]]) {
+#pragma clang diagnostic pop
                               // Delete this legacy interactions, which has been superseded by
                               // the OWSContactOffersInteraction.
                               [interactionsToDelete addObject:object];
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
                           } else if ([object isKindOfClass:[TSUnreadIndicatorInteraction class]]) {
+#pragma clang diagnostic pop
                               // Remove obsolete unread indicator interactions;
                               [interactionsToDelete addObject:object];
                           } else if ([object isKindOfClass:[OWSContactOffersInteraction class]]) {
@@ -465,7 +476,6 @@ NS_ASSUME_NONNULL_BEGIN
             = (shouldHaveBlockOffer || shouldHaveAddToContactsOffer || shouldHaveAddToProfileWhitelistOffer);
         if (isContactThread) {
             TSContactThread *contactThread = (TSContactThread *)thread;
-            // MJK only place where `hasDismissedOffers` is read
             if (contactThread.hasDismissedOffers) {
                 shouldHaveContactOffers = NO;
             }

SignalServiceKit/src/Contacts/TSThread.h

@@ -58,7 +58,10 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  * Get all messages in the thread we weren't able to decrypt
  */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 - (NSArray<TSInvalidIdentityKeyReceivingErrorMessage *> *)receivedMessagesForInvalidKey:(NSData *)key;
+#pragma clang diagnostic pop
 
 - (NSUInteger)unreadMessageCountWithTransaction:(YapDatabaseReadTransaction *)transaction
     NS_SWIFT_NAME(unreadMessageCount(transaction:));

SignalServiceKit/src/Contacts/TSThread.m

@@ -206,6 +206,8 @@ NS_ASSUME_NONNULL_BEGIN
     return [interactions copy];
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 - (NSArray<TSInvalidIdentityKeyReceivingErrorMessage *> *)receivedMessagesForInvalidKey:(NSData *)key
 {
     NSMutableArray *errorMessages = [NSMutableArray new];
@@ -220,6 +222,7 @@ NS_ASSUME_NONNULL_BEGIN
 
     return [errorMessages copy];
 }
+#pragma clang diagnostic pop
 
 - (NSUInteger)numberOfInteractions
 {

SignalServiceKit/src/Devices/OWSRecordTranscriptJob.m

@@ -70,7 +70,7 @@ NS_ASSUME_NONNULL_BEGIN
     if (transcript.isEndSessionMessage) {
         OWSLogInfo(@"EndSession was sent to recipient: %@.", transcript.recipientId);
         [self.primaryStorage deleteAllSessionsForContact:transcript.recipientId protocolContext:transaction];
-        // MJK TODO - verify we can delete this senderTimestamp
+        // MJK TODO - we don't use this timestamp, safe to remove
         [[[TSInfoMessage alloc] initWithSenderTimestamp:transcript.timestamp
                                                inThread:transcript.thread
                                             messageType:TSInfoMessageTypeSessionDidEnd]

SignalServiceKit/src/Messages/Interactions/TSErrorMessage.h

@@ -51,10 +51,6 @@ typedef NS_ENUM(int32_t, TSErrorMessageType) {
                       failedMessageType:(TSErrorMessageType)errorMessageType
                             recipientId:(nullable NSString *)recipientId NS_DESIGNATED_INITIALIZER;
 
-- (instancetype)initWithSenderTimestamp:(uint64_t)timestamp
-                               inThread:(nullable TSThread *)thread
-                      failedMessageType:(TSErrorMessageType)errorMessageType;
-
 + (instancetype)corruptedMessageWithEnvelope:(SSKProtoEnvelope *)envelope
                              withTransaction:(YapDatabaseReadWriteTransaction *)transaction;
 

SignalServiceKit/src/Messages/Interactions/TSErrorMessage.m

@@ -91,18 +91,11 @@ NSUInteger TSErrorMessageSchemaVersion = 1;
     TSContactThread *contactThread =
         [TSContactThread getOrCreateThreadWithContactId:envelope.source transaction:transaction];
 
-    // MJK FIXME - cannot rely on envelope timestamp for sorting, ensure this is saved immediately.
+    // Legit usage of senderTimestamp. We don't actually currently surface it in the UI, but it serves as
+    // a reference to the envelope which we failed to process.
     return [self initWithSenderTimestamp:envelope.timestamp inThread:contactThread failedMessageType:errorMessageType];
 }
 
-- (instancetype)initWithFailedMessageType:(TSErrorMessageType)errorMessageType
-{
-    // MJK FIXME - cannot rely on envelope timestamp for sorting, ensure this is saved immediately.
-    return [self initWithSenderTimestamp:[NSDate ows_millisecondTimeStamp]
-                                inThread:nil
-                       failedMessageType:errorMessageType];
-}
-
 - (OWSInteractionType)interactionType
 {
     return OWSInteractionType_Error;
@@ -160,7 +153,10 @@ NSUInteger TSErrorMessageSchemaVersion = 1;
 
 + (instancetype)corruptedMessageInUnknownThread
 {
-    return [[self alloc] initWithFailedMessageType:TSErrorMessageInvalidMessage];
+    // MJK TODO - Seems like we could safely remove this timestamp
+    return [[self alloc] initWithSenderTimestamp:[NSDate ows_millisecondTimeStamp]
+                                        inThread:nil
+                               failedMessageType:TSErrorMessageInvalidMessage];
 }
 
 + (instancetype)invalidVersionWithEnvelope:(SSKProtoEnvelope *)envelope

SignalServiceKit/src/Messages/Interactions/TSErrorMessage_privateConstructor.h

@@ -4,17 +4,16 @@
 
 #import "TSErrorMessage.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface TSErrorMessage ()
 
 - (instancetype)initWithSenderTimestamp:(uint64_t)timestamp
-                               inThread:(TSThread *)thread
+                               inThread:(nullable TSThread *)thread
                       failedMessageType:(TSErrorMessageType)errorMessageType NS_DESIGNATED_INITIALIZER;
 
 @property (atomic, nullable) NSData *envelopeData;
 
-@property NSDictionary *pendingOutgoingMessage;
-
-#define TSPendingOutgoingMessageKey @"TSPendingOutgoingMessageKey"
-#define TSPendingOutgoingMessageRecipientKey @"TSPendingOutgoingMessageRecipientKey"
-
 @end
+
+NS_ASSUME_NONNULL_END

SignalServiceKit/src/Messages/InvalidKeyMessages/TSInvalidIdentityKeyReceivingErrorMessage.h

@@ -10,10 +10,13 @@ NS_ASSUME_NONNULL_BEGIN
 
 // DEPRECATED - we no longer create new instances of this class (as of  mid-2017); However, existing instances may
 // exist, so we should keep this class around to honor their old behavior.
+__attribute__((deprecated))
 @interface TSInvalidIdentityKeyReceivingErrorMessage : TSInvalidIdentityKeyErrorMessage
 
+#ifdef DEBUG
 + (nullable instancetype)untrustedKeyWithEnvelope:(SSKProtoEnvelope *)envelope
                                   withTransaction:(YapDatabaseReadWriteTransaction *)transaction;
+#endif
 
 @end
 

SignalServiceKit/src/Messages/InvalidKeyMessages/TSInvalidIdentityKeyReceivingErrorMessage.m

@@ -19,7 +19,7 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-/// TODO we can eventually deprecate this, since incoming messages are now always decrypted.
+__attribute__((deprecated))
 @interface TSInvalidIdentityKeyReceivingErrorMessage ()
 
 @property (nonatomic, readonly, copy) NSString *authorId;
@@ -33,13 +33,16 @@ NS_ASSUME_NONNULL_BEGIN
 
 @synthesize envelopeData = _envelopeData;
 
+#ifdef DEBUG
+// We no longer create these messages, but they might exist on legacy clients so it's useful to be able to
+// create them with the debug UI
 + (nullable instancetype)untrustedKeyWithEnvelope:(SSKProtoEnvelope *)envelope
                                   withTransaction:(YapDatabaseReadWriteTransaction *)transaction
 {
     TSContactThread *contactThread =
     [TSContactThread getOrCreateThreadWithContactId:envelope.source transaction:transaction];
 
-    // MJK - FIXME, can't rely on envelope.timestamp for sorting, ensure this is saved immediately.
+    // Legit usage of senderTimestamp, references message which failed to decrypt
     TSInvalidIdentityKeyReceivingErrorMessage *errorMessage =
         [[self alloc] initForUnknownIdentityKeyWithSenderTimestamp:envelope.timestamp
                                                           inThread:contactThread
@@ -69,6 +72,7 @@ NS_ASSUME_NONNULL_BEGIN
     
     return self;
 }
+#endif
 
 - (nullable SSKProtoEnvelope *)envelope
 {

SignalServiceKit/src/Messages/InvalidKeyMessages/TSInvalidIdentityKeySendingErrorMessage.h

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
 //
 
 #import "TSInvalidIdentityKeyErrorMessage.h"
@@ -13,6 +13,9 @@ NS_ASSUME_NONNULL_BEGIN
 extern NSString *TSInvalidPreKeyBundleKey;
 extern NSString *TSInvalidRecipientKey;
 
+// DEPRECATED - we no longer create new instances of this class (as of  mid-2017); However, existing instances may
+// exist, so we should keep this class around to honor their old behavior.
+__attribute__((deprecated))
 @interface TSInvalidIdentityKeySendingErrorMessage : TSInvalidIdentityKeyErrorMessage
 
 @property (nonatomic, readonly) NSString *messageId;

SignalServiceKit/src/Messages/InvalidKeyMessages/TSInvalidIdentityKeySendingErrorMessage.m

@@ -24,27 +24,12 @@ NSString *TSInvalidRecipientKey = @"TSInvalidRecipientKey";
 
 @end
 
+// DEPRECATED - we no longer create new instances of this class (as of  mid-2017); However, existing instances may
+// exist, so we should keep this class around to honor their old behavior.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
 @implementation TSInvalidIdentityKeySendingErrorMessage
-
-- (instancetype)initWithOutgoingMessage:(TSOutgoingMessage *)message
-                               inThread:(TSThread *)thread
-                           forRecipient:(NSString *)recipientId
-                           preKeyBundle:(PreKeyBundle *)preKeyBundle
-{
-    // We want the error message to appear after the message.
-    // MJK FIXME - we can't rely on sort order like this.
-    self = [super initWithSenderTimestamp:message.timestamp + 1
-                                 inThread:thread
-                        failedMessageType:TSErrorMessageWrongTrustedIdentityKey
-                              recipientId:recipientId];
-
-    if (self) {
-        _messageId    = message.uniqueId;
-        _preKeyBundle = preKeyBundle;
-    }
-
-    return self;
-}
+#pragma clang diagnostic pop
 
 - (void)acceptNewIdentityKey
 {

SignalServiceKit/src/Messages/OWSAddToContactsOfferMessage.m

@@ -16,7 +16,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 // This is a deprecated class, we're keeping it around to avoid YapDB serialization errors
 // TODO - remove this class, clean up existing instances, ensure any missed ones don't explode (UnknownDBObject)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
 @implementation OWSAddToContactsOfferMessage
+#pragma clang diagnostic pop
 
 + (instancetype)addToContactsOfferMessageWithSenderTimestamp:(uint64_t)timestamp
                                                       thread:(TSThread *)thread

SignalServiceKit/src/Messages/OWSAddToProfileWhitelistOfferMessage.m

@@ -9,7 +9,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 // This is a deprecated class, we're keeping it around to avoid YapDB serialization errors
 // TODO - remove this class, clean up existing instances, ensure any missed ones don't explode (UnknownDBObject)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
 @implementation OWSAddToProfileWhitelistOfferMessage
+#pragma clang diagnostic pop
 
 + (instancetype)addToProfileWhitelistOfferMessageWithSenderTimestamp:(uint64_t)timestamp thread:(TSThread *)thread
 {

SignalServiceKit/src/Messages/OWSIdentityManager.m

@@ -528,6 +528,7 @@ NSString *const kNSNotificationName_IdentityStateDidChange = @"kNSNotificationNa
         [messages addObject:[TSErrorMessage nonblockingIdentityChangeInThread:groupThread recipientId:recipientId]];
     }
 
+    // MJK TODO - why not save immediately, why build up this array?
     for (TSMessage *message in messages) {
         [message saveWithTransaction:transaction];
     }

SignalServiceKit/src/Messages/OWSUnknownContactBlockOfferMessage.h

@@ -8,11 +8,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 // This is a deprecated class, we're keeping it around to avoid YapDB serialization errors
 // TODO - remove this class, clean up existing instances, ensure any missed ones don't explode (UnknownDBObject)
-__attribute__((deprecated)) @interface OWSUnknownContactBlockOfferMessage : TSErrorMessage
-
-+ (instancetype)unknownContactBlockOfferMessageWithSenderTimestamp:(uint64_t)timestamp
-                                                            thread:(TSThread *)thread
-                                                         contactId:(NSString *)contactId;
+__attribute__((deprecated))
+@interface OWSUnknownContactBlockOfferMessage : TSErrorMessage
 
 @property (nonatomic, readonly) NSString *contactId;
 

SignalServiceKit/src/Messages/OWSUnknownContactBlockOfferMessage.m

@@ -16,29 +16,10 @@ NS_ASSUME_NONNULL_BEGIN
 
 // This is a deprecated class, we're keeping it around to avoid YapDB serialization errors
 // TODO - remove this class, clean up existing instances, ensure any missed ones don't explode (UnknownDBObject)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
 @implementation OWSUnknownContactBlockOfferMessage
-
-+ (instancetype)unknownContactBlockOfferMessageWithSenderTimestamp:(uint64_t)timestamp
-                                                            thread:(TSThread *)thread
-                                                         contactId:(NSString *)contactId
-{
-    return [[OWSUnknownContactBlockOfferMessage alloc] initWithSenderTimestamp:timestamp
-                                                                        thread:thread
-                                                                     contactId:contactId];
-}
-
-- (instancetype)initWithSenderTimestamp:(uint64_t)timestamp thread:(TSThread *)thread contactId:(NSString *)contactId
-{
-    self = [super initWithSenderTimestamp:timestamp
-                                 inThread:thread
-                        failedMessageType:TSErrorMessageUnknownContactBlockOffer];
-
-    if (self) {
-        _contactId = contactId;
-    }
-
-    return self;
-}
+#pragma clang diagnostic pop
 
 - (BOOL)shouldUseReceiptDateForSorting
 {