Remove an unnecessary database view.

// FREEBIE.

src/Contacts/TSThread.m

@@ -245,9 +245,23 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (TSInteraction *)lastInteractionForInbox
 {
-    __block TSInteraction *last;
+    __block TSInteraction *last = nil;
     [TSStorageManager.sharedManager.dbConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
-        last = [[transaction ext:TSThreadInboxMessagesDatabaseViewExtensionName] lastObjectInGroup:self.uniqueId];
+        [[transaction ext:TSMessageDatabaseViewExtensionName]
+            enumerateRowsInGroup:self.uniqueId
+                     withOptions:NSEnumerationReverse
+                      usingBlock:^(
+                          NSString *collection, NSString *key, id object, id metadata, NSUInteger index, BOOL *stop) {
+
+                          OWSAssert([object isKindOfClass:[TSInteraction class]]);
+
+                          TSInteraction *interaction = (TSInteraction *)object;
+
+                          if ([TSThread shouldInteractionAppearInInbox:interaction]) {
+                              last = interaction;
+                              *stop = YES;
+                          }
+                      }];
     }];
     return last;
 }

src/Storage/TSDatabaseView.h

@@ -14,7 +14,6 @@ extern NSString *TSSecondaryDevicesGroup;
 
 extern NSString *TSThreadDatabaseViewExtensionName;
 extern NSString *TSMessageDatabaseViewExtensionName;
-extern NSString *TSThreadInboxMessagesDatabaseViewExtensionName;
 extern NSString *TSThreadIncomingMessageDatabaseViewExtensionName;
 extern NSString *TSThreadOutgoingMessageDatabaseViewExtensionName;
 extern NSString *TSUnreadDatabaseViewExtensionName;
@@ -25,7 +24,6 @@ extern NSString *TSSecondaryDevicesDatabaseViewExtensionName;
 
 + (BOOL)registerThreadDatabaseView;
 + (BOOL)registerThreadInteractionsDatabaseView;
-+ (BOOL)registerThreadInboxMessageDatabaseView;
 + (BOOL)registerThreadIncomingMessagesDatabaseView;
 + (BOOL)registerThreadOutgoingMessagesDatabaseView;
 

src/Storage/TSDatabaseView.m

@@ -20,7 +20,6 @@ NSString *TSSecondaryDevicesGroup = @"TSSecondaryDevicesGroup";
 
 NSString *TSThreadDatabaseViewExtensionName  = @"TSThreadDatabaseViewExtensionName";
 NSString *TSMessageDatabaseViewExtensionName = @"TSMessageDatabaseViewExtensionName";
-NSString *TSThreadInboxMessagesDatabaseViewExtensionName = @"TSThreadInboxMessagesDatabaseViewExtensionName";
 NSString *TSThreadIncomingMessageDatabaseViewExtensionName = @"TSThreadOutgoingMessageDatabaseViewExtensionName";
 NSString *TSThreadOutgoingMessageDatabaseViewExtensionName = @"TSThreadOutgoingMessageDatabaseViewExtensionName";
 NSString *TSUnreadDatabaseViewExtensionName  = @"TSUnreadDatabaseViewExtensionName";
@@ -148,27 +147,6 @@ NSString *TSSecondaryDevicesDatabaseViewExtensionName = @"TSSecondaryDevicesData
                                              version:@"1"];
 }
 
-+ (BOOL)registerThreadInboxMessageDatabaseView
-{
-    YapDatabaseViewGrouping *viewGrouping = [YapDatabaseViewGrouping withObjectBlock:^NSString *(
-        YapDatabaseReadTransaction *transaction, NSString *collection, NSString *key, id object) {
-        if ([object isKindOfClass:[TSInteraction class]]) {
-            TSInteraction *interaction = (TSInteraction *)object;
-            if (![TSThread shouldInteractionAppearInInbox:interaction]) {
-                return nil;
-            }
-            return interaction.uniqueThreadId;
-        } else {
-            OWSAssert(0);
-        }
-        return nil;
-    }];
-
-    return [self registerMessageDatabaseViewWithName:TSThreadInboxMessagesDatabaseViewExtensionName
-                                        viewGrouping:viewGrouping
-                                             version:@"1"];
-}
-
 + (BOOL)registerThreadIncomingMessagesDatabaseView
 {
     YapDatabaseViewGrouping *viewGrouping = [YapDatabaseViewGrouping withObjectBlock:^NSString *(

src/Storage/TSStorageManager.m

@@ -193,10 +193,9 @@ static NSString *keychainDBPassAccount    = @"TSDatabasePass";
 
 - (void)setupDatabase
 {
-    // Register extensions which are essential for rendering threads synchronously
+    // Synchronously register extensions which are essential for views.
     [TSDatabaseView registerThreadDatabaseView];
     [TSDatabaseView registerThreadInteractionsDatabaseView];
-    [TSDatabaseView registerThreadInboxMessageDatabaseView];
     [TSDatabaseView registerThreadIncomingMessagesDatabaseView];
     [TSDatabaseView registerThreadOutgoingMessagesDatabaseView];
     [TSDatabaseView registerUnreadDatabaseView];