Add a whole ton more code.

Evergreen/MainWindow/AddFolder/AddFolderWindowController.swift

@@ -0,0 +1,85 @@
+//
+//  AddFolderWindowController.swift
+//  Evergreen
+//
+//  Created by Brent Simmons on 8/1/15.
+//  Copyright © 2015 Ranchero Software, LLC. All rights reserved.
+//
+
+import Cocoa
+import DataModel
+
+//func addFolderWindowController() -> AddFolderWindowController {
+//	
+//	return AddFolderWindowController(windowNibName: "AddFolderSheet")
+//}
+
+class AddFolderWindowController : NSWindowController {
+    
+    @IBOutlet var folderNameTextField: NSTextField!
+    @IBOutlet var accountPopupButton: NSPopUpButton!
+    var hostWindow: NSWindow?
+
+	convenience init() {
+
+		self.init(windowNibName: "AddFolderSheet")
+	}
+
+    // MARK: API
+    
+    func runSheetOnWindow(_ w: NSWindow) {
+
+		hostWindow = w
+        hostWindow!.beginSheet(window!) { (returnCode: NSModalResponse) -> Void in
+			
+			if returnCode == NSModalResponseOK {
+				self.addFolderIfNeeded()
+			}
+		}
+    }
+
+	// MARK: NSViewController
+	
+	override func windowDidLoad() {
+		
+		accountPopupButton.removeAllItems()
+		let menu = NSMenu()
+		for oneAccount in AccountManager.sharedInstance.sortedAccounts {
+			let oneMenuItem = NSMenuItem()
+			oneMenuItem.title = oneAccount.nameForDisplay
+			oneMenuItem.representedObject = oneAccount
+			menu.addItem(oneMenuItem)
+		}
+		accountPopupButton.menu = menu
+	}
+	
+	// MARK: Private
+	
+	private func addFolderIfNeeded() {
+		
+		guard let menuItem = accountPopupButton.selectedItem else {
+			return
+		}
+		let account = menuItem.representedObject as! Account
+		
+		let folderName = self.folderNameTextField.stringValue
+		if folderName.isEmpty {
+			return
+		}
+		
+		let _ = account.ensureFolderWithName(folderName)
+	}
+	
+	// MARK: Actions
+	
+    @IBAction func cancel(_ sender: AnyObject) {
+        
+        hostWindow!.endSheet(window!, returnCode: NSModalResponseCancel)
+    }
+    
+    @IBAction func addFolder(_ sender: AnyObject) {
+        
+        hostWindow!.endSheet(window!, returnCode: NSModalResponseOK)
+    }
+    
+}