Remove contact share avatars upon message deletion

// FREEBIE

SignalServiceKit/src/Messages/Interactions/OWSContact.h

@@ -117,6 +117,8 @@ NSString *NSStringForContactAddressType(OWSContactAddressType value);
 
 @property (nonatomic, readonly, nullable) NSString *avatarAttachmentId;
 - (nullable TSAttachment *)avatarAttachmentWithTransaction:(YapDatabaseReadTransaction *)transaction;
+- (void)removeAvatarAttachmentWithTransaction:(YapDatabaseReadWriteTransaction *)transaction;
+
 - (void)saveAvatarImage:(UIImage *)image transaction:(YapDatabaseReadWriteTransaction *)transaction;
 // "Profile" avatars should _not_ be saved to device contacts.
 @property (nonatomic, readonly) BOOL isProfileAvatar;

SignalServiceKit/src/Messages/Interactions/OWSContact.m

@@ -499,6 +499,13 @@ NSString *NSStringForContactAddressType(OWSContactAddressType value)
     self.avatarAttachmentId = attachmentStream.uniqueId;
 }
 
+- (void)removeAvatarAttachmentWithTransaction:(YapDatabaseReadWriteTransaction *)transaction
+{
+    TSAttachmentStream *_Nullable attachment =
+        [TSAttachmentStream fetchObjectWithUniqueID:self.avatarAttachmentId transaction:transaction];
+    [attachment removeWithTransaction:transaction];
+}
+
 #pragma mark - Phone Numbers and Recipient IDs
 
 - (NSArray<NSString *> *)systemContactsWithSignalAccountPhoneNumbers:(id<ContactsManagerProtocol>)contactsManager

SignalServiceKit/src/Messages/Interactions/TSMessage.m

@@ -289,6 +289,10 @@ static const NSUInteger OWSMessageSchemaVersion = 4;
         [attachment removeWithTransaction:transaction];
     };
 
+    if (self.contactShare.avatarAttachmentId) {
+        [self.contactShare removeAvatarAttachmentWithTransaction:transaction];
+    }
+
     // Updates inbox thread preview
     [self touchThreadWithTransaction:transaction];
 }