Fix unseen count retrieval of nested IMAP folders

NEWS

@@ -36,6 +36,7 @@ Bug fixes
  - [web] fixed fab button position in Calendar module (#3462)
  - [web] fixed default priority of sent messages (#3542)
  - [web] removed double-quotes from Chinese (Taiwan) translations that were breaking templates
+ - [web] fixed unseen count retrieval of nested IMAP folders
  - [eas] allow EAS attachments get on 2nd-level mailboxes (#3505)
  - [eas] fix EAS bday shift (#3518)
 

SoObjects/Mailer/SOGoMailAccount.h

@@ -90,7 +90,11 @@ typedef enum {
 
 - (BOOL) isInDraftsFolder;
 
-/* special folders */
+- (id) lookupNameByPaths: (NSArray *) _paths
+               inContext: (id)_ctx
+                 acquire: (BOOL) _flag;
+
+  /* special folders */
 - (NSString *) inboxFolderNameInContext: (id)_ctx;
 - (NSString *) draftsFolderNameInContext: (id)_ctx;
 - (NSString *) sentFolderNameInContext: (id)_ctx;

SoObjects/Mailer/SOGoMailAccount.m

@@ -819,6 +819,25 @@ static NSString *inboxFolderName = @"INBOX";
 
 /* name lookup */
 
+- (id) lookupNameByPaths: (NSArray *) _paths
+               inContext: (id)_ctx
+                 acquire: (BOOL) _flag
+{
+  NSString *folderName;
+  NSUInteger count, max;
+  SOGoMailBaseObject *folder;
+
+  max = [_paths count];
+  folder = self;
+  for (count = 0; folder && count < max; count++)
+    {
+      folderName = [_paths objectAtIndex: count];
+      folder = [folder lookupName: folderName inContext: _ctx acquire: _flag];
+    }
+
+  return folder;
+}
+
 - (id) lookupName: (NSString *) _key
 	inContext: (id)_ctx
 	  acquire: (BOOL) _flag

UI/MailerUI/UIxMailMainFrame.m

@@ -641,10 +641,9 @@
   account = [[self clientObject] lookupName: [pathComponents objectAtIndex: 0]
                                   inContext: context
                                     acquire: YES];
-
-  folder = [account lookupName: [NSString pathWithComponents: [pathComponents subarrayWithRange: NSMakeRange(1, [pathComponents count]-1)]]
-                     inContext: context
-                       acquire: YES];
+  folder = [account lookupNameByPaths: [pathComponents subarrayWithRange: NSMakeRange(1, [pathComponents count]-1)]
+                            inContext: context
+                              acquire: YES];
 
   return [folder unseenCount];
 }