Fix "can't send same GIF twice" issue.

// FREEBIE

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -2330,9 +2330,6 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
     OWSAssert([NSThread isMainThread]);
     OWSAssert(message);
 
-    [self.editingDatabaseConnection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
-        [message saveWithTransaction:transaction];
-    }];
     [self updateLastVisibleTimestamp:message.timestampForSorting];
     self.lastMessageSentDate = [NSDate new];
     [self clearUnreadMessagesIndicator];

Signal/src/ViewControllers/ConversationView/ConversationViewItem.m

@@ -326,7 +326,7 @@ NSString *NSStringForOWSMessageCellType(OWSMessageCellType cellType)
     } else {
         NSString *_Nullable attachmentId = interaction.attachmentIds.firstObject;
         if (attachmentId.length > 0) {
-            TSAttachment *attachment = [TSAttachment fetchObjectWithUniqueID:attachmentId];
+            TSAttachment *_Nullable attachment = [TSAttachment fetchObjectWithUniqueID:attachmentId];
             if ([attachment isKindOfClass:[TSAttachmentStream class]]) {
                 self.attachmentStream = (TSAttachmentStream *)attachment;
 
@@ -364,10 +364,15 @@ NSString *NSStringForOWSMessageCellType(OWSMessageCellType cellType)
                 self.messageCellType = OWSMessageCellType_DownloadingAttachment;
                 self.attachmentPointer = (TSAttachmentPointer *)attachment;
                 return;
+            } else {
+                OWSFail(@"%@ Unknown attachment type", self.tag);
             }
+        } else {
+            OWSFail(@"%@ Message has neither attachment nor body", self.tag);
         }
     }
 
+    DDLogVerbose(@"%@ interaction: %@", self.tag, interaction.description);
     OWSFail(@"%@ Unknown cell type", self.tag);
 
     self.messageCellType = OWSMessageCellType_Unknown;

SignalServiceKit/src/Util/DataSource.m

@@ -300,6 +300,20 @@ NS_ASSUME_NONNULL_BEGIN
     return instance;
 }
 
+- (void)setFilePath:(NSString *)filePath
+{
+    OWSAssert(filePath.length > 0);
+
+#ifdef DEBUG
+    BOOL isDirectory;
+    BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:filePath isDirectory:&isDirectory];
+    OWSAssert(exists);
+    OWSAssert(!isDirectory);
+#endif
+
+    _filePath = filePath;
+}
+
 - (NSData *)data
 {
     OWSAssert(self.filePath);