Adding login manager popup

application/src/main/kotlin/net/codebot/application/LoginManager.kt

+package net.codebot.application
+
+import javafx.event.EventHandler
+import javafx.geometry.Insets
+import javafx.geometry.Pos
+import javafx.scene.Scene
+import javafx.scene.control.Button
+import javafx.scene.control.Label
+import javafx.scene.control.PasswordField
+import javafx.scene.control.TextField
+import javafx.scene.layout.GridPane
+import javafx.scene.layout.HBox
+import javafx.scene.layout.StackPane
+import javafx.scene.paint.Color
+import javafx.scene.text.Text
+import javafx.stage.Stage
+
+
+class LoginManager {
+    fun build(self: Stage, markdown: Stage): StackPane {
+        val grid = GridPane()
+        grid.alignment = Pos.CENTER
+        grid.hgap = 10.0
+        grid.vgap = 10.0
+        grid.padding = Insets(25.0, 25.0, 25.0, 25.0)
+
+        val gridTitle = Text("User Login")
+        grid.add(gridTitle, 0, 0, 2, 1)
+
+        val userName = Label("User Name:")
+        grid.add(userName, 0, 1)
+        val userTextField = TextField()
+        grid.add(userTextField, 1, 1)
+
+        val pw = Label("Password:")
+        grid.add(pw, 0, 2)
+        val pwBox = PasswordField()
+        grid.add(pwBox, 1, 2)
+
+        // Defining sign in buttons and their placement
+        val guestBtn = Button("Sign in as Guest")
+        val userBtn = Button("Sign in")
+        val hbBtn = HBox(10.0)
+        hbBtn.alignment = Pos.BOTTOM_RIGHT
+        hbBtn.children.addAll(guestBtn, userBtn)
+        grid.add(hbBtn, 1, 4)
+
+        val actiontarget = Text()
+        grid.add(actiontarget, 1, 6)
+
+        guestBtn.onAction = EventHandler {
+            markdown.show()
+            self.hide()
+        }
+
+        userBtn.onAction = EventHandler {
+            actiontarget.setFill(Color.FIREBRICK)
+            val user = userTextField.text
+            val password = pwBox.text
+
+            if (user == "") {
+                actiontarget.setText("Enter a user name.")
+            } else if (password == "") {
+                actiontarget.setText("Enter a password.")
+            } else {
+                actiontarget.setText("Username: " + user + " Password: " + password)
+            }
+        }
+
+        return StackPane(grid)
+    }
+}
\ No newline at end of file

application/src/main/kotlin/net/codebot/application/Main.kt

@@ -11,13 +11,17 @@ import com.vladsch.flexmark.util.data.MutableDataSet
 import com.vladsch.flexmark.util.misc.Extension
 import javafx.application.Application
 import javafx.event.EventHandler
+import javafx.geometry.Insets
+import javafx.geometry.Pos
 import javafx.scene.Scene
 import javafx.scene.control.*
 import javafx.scene.input.*
 import javafx.scene.layout.BorderPane
+import javafx.scene.layout.GridPane
 import javafx.scene.layout.HBox
 import javafx.scene.layout.VBox
 import javafx.scene.text.Font
+import javafx.scene.text.Text
 import javafx.scene.web.WebView
 import javafx.stage.FileChooser
 import javafx.stage.Stage
@@ -34,7 +38,8 @@ class Main : Application() {
         var userConfig = initConfig()
         // variables to know on startup? maybe user preferences etc.
         var cur_theme = "darkMode.css"
-
+        // stage for login window
+        val loginStage = Stage()
 
         var cur_file: FolderView.cur_File = FolderView.cur_File()
         val bold = Button("B")
@@ -195,8 +200,9 @@ class Main : Application() {
         val new = MenuItem("New")
         val saveAsFile = MenuItem("Save As")
         val saveFile = MenuItem("Save")
+        val signOut = MenuItem("Sign Out")
         val exitApp = MenuItem("Exit")
-        file.items.addAll(openFile, new, saveFile, saveAsFile, exitApp)
+        file.items.addAll(openFile, new, saveFile, saveAsFile, signOut,exitApp)
 
         val edit = Menu("Edit")
         val undo = MenuItem("Undo")
@@ -345,7 +351,12 @@ class Main : Application() {
             }
         }
 
-
+        signOut.onAction = EventHandler {
+            stage.hide()
+            loginStage.show()
+            loginStage.scene = Scene(LoginManager().build(loginStage, stage))
+            // reset stage as well
+        }
 
         // Undo, Redo
         undo.isDisable = true
@@ -445,7 +456,12 @@ class Main : Application() {
         stage.height = 450.0
         stage.title = "Markdown Editor"
         stage.scene = scene
-        stage.show()
-    }
+        stage.hide()
 
+        // authentication box
+        val loginScene = Scene(LoginManager().build(loginStage, stage))
+        loginStage.scene = loginScene
+        loginStage.title = "User Login"
+        loginStage.show()
+    }
 }
\ No newline at end of file