implemented opening directories and starting servers

app/src/main/kotlin/xyz/brysonsteck/serverfordummies/PrimaryController.kt

@@ -6,6 +6,8 @@ import org.rauschig.jarchivelib.*
 
 import java.io.File
 import java.io.IOException
+import java.io.BufferedReader
+import java.io.InputStreamReader
 import java.awt.Checkbox
 import java.util.Properties
 import java.net.URL
@@ -108,6 +110,9 @@ class PrimaryController {
   lateinit private var buildButton: Button
 
   private var building = false
+  private var directory = ""
+  private var asyncResult = false
+  private var started = false
   
   @FXML
   private fun onDirectoryButtonClick() {
@@ -117,10 +122,17 @@ class PrimaryController {
     val result = dirChooser.showDialog(null)
     if (result != null) {
       currentDirectoryLabel.text = result.absolutePath
-      val real = loadServerDir(result.absolutePath)
+      val res = loadServerDir(result.absolutePath)
+      if (res) {
         parentPane.isDisable = false
         worldSettingsPane.isDisable = false
         buttonBar.isDisable = false
+      } else {
+        currentDirectoryLabel.text = "<NONE>"
+        parentPane.isDisable = true
+        worldSettingsPane.isDisable = true
+        buttonBar.isDisable = true
+      }
     }
   }
 
@@ -198,17 +210,59 @@ class PrimaryController {
 
   @FXML
   private fun onStart() {
+    if (started) {
+      createDialog("warning", "You should only kill the server if\nabsolutely necessary. Data loss may occur.\nContinue anyway?", "Yes", "No", false)
+      return;
+    }
+    started = true
     statusBar.text = "The Minecraft Server is now running. Shutdown the server to unlock the settings."
+    worldSettingsPane.isDisable = true
+    directoryPane.isDisable = true
+    parentPane.isDisable = true
+    buildButton.isDisable = true
+    startButton.text = "Kill Server"
     @Suppress("OPT_IN_USAGE")
     GlobalScope.launch(Dispatchers.Default) {
-      val proc = Runtime.getRuntime().exec("java -jar /home/bryson/test/testserver/server.jar");
+      val builder = ProcessBuilder("java", "-jar", "${directory}server.jar")
+      builder.directory(File(directory))
+      val proc = builder.start()
+      val reader = InputStreamReader(proc.inputStream)
+      val br = BufferedReader(reader)
+      try {
+        var line = br.readLine()
+        while (line != null) {
+          if (asyncResult) {
+            proc.destroy()
+          }
+          println(line);
+          line = br.readLine()
+        }
+      } catch (e: IOException) {
+        println("Stream closed")
+      }
+      withContext(Dispatchers.JavaFx) {
+        statusBar.text = if (asyncResult) {
+          asyncResult = false
+          "Server killed."
+        } else {
+          "Server stopped."
+        }
+        worldSettingsPane.isDisable = false
+        directoryPane.isDisable = false
+        parentPane.isDisable = false
+        buildButton.isDisable = false
+        startButton.text = "Start Server"
+        started = false
+      }
     } 
   }
 
-  private fun createDialog(type: String, msg: String, yes: String, no: String) {
+  private fun createDialog(type: String, msg: String, yes: String, no: String, hold: Boolean): Boolean {
+    var result = false
     val resources = this.javaClass.getResource("icons/$type.png")
     val dialog = Stage();
     dialog.initModality(Modality.APPLICATION_MODAL);
+    dialog.title = directory
     val scenePane = Pane()
     val dialogScene = Scene(scenePane, 400.0, 150.0);
     val imagePane = Pane()
@@ -220,25 +274,45 @@ class PrimaryController {
     imagePane.children.add(ImageView(icon))
     val label = Label(msg)
     label.layoutX = 115.0
-    label.layoutY = 40.0
+    label.layoutY = if (type == "warning") {10.0} else {40.0}
     val buttonBar = ButtonBar()
     buttonBar.padding = Insets(10.0, 10.0, 10.0, 10.0)
     buttonBar.layoutX = 0.0
     buttonBar.layoutY = 107.0
     buttonBar.prefWidth = 400.0
     val noButton = Button(no)
+    noButton.onMouseClicked = EventHandler<MouseEvent>() {
+      if (hold) {
+        result = false
+      } else {
+        asyncResult = false
+      }
+      dialog.hide()
+    }
     val yesButton = Button(yes)
+    yesButton.onMouseClicked = EventHandler<MouseEvent>() {
+      if (hold) {
+        result = true
+      } else {
+        asyncResult = true
+      }
+      dialog.hide()
+    }
     yesButton.isDefaultButton = true
     buttonBar.buttons.add(noButton)
     buttonBar.buttons.add(yesButton)
     scenePane.children.addAll(imagePane, label, buttonBar)
     dialog.setScene(dialogScene);
+    if (hold) {
+      dialog.showAndWait();
+    } else {
       dialog.show();
     }
+    return result
+  }
 
   private fun loadServerDir(dir: String): Boolean {
-    createDialog("info", "There is no server in this directory.\nCreate one?", "Yes", "No")
+    directory = dir
-    var directory = dir
     var hasServer = false
     if (!File(directory).isDirectory) {
       return false;
@@ -249,7 +323,9 @@ class PrimaryController {
 
     val hasDummy = File(directory + "ServerForDummies").isDirectory
 
-    for (i in 20 downTo 8) {
+    // major version
+    for (i in 25 downTo 8) {
+      // patch number
       for (j in 15 downTo 0) {
         var spigotFile: String = ""
         if (j == 0)
@@ -266,17 +342,26 @@ class PrimaryController {
     val hasProperties = File(directory + File.separator + "server.properties").isFile
 
     if (hasDummy && hasServer) {
-      // read jproperties
+      // server complete, just read jproperties
-      println("read jproperties")
+      statusBar.text = "Server found!"
+      startButton.isDisable = false
     } else if (hasDummy && !hasServer && hasProperties) {
       // just needs to be built
-      println("build")
+      startButton.isDisable = true
+      statusBar.text = "Server needs to be built before starting."
     } else if (!hasDummy && hasServer) {
       // server created externally
-      println("server made externally")
+      val result = createDialog("warning", "This server directory was not created by \nServerForDummies. Errors may occur; copying\nthe world directories to a new folder may be\nsafer. Proceed anyway?", "Yes", "No", true)
+      statusBar.text = "Ready."
+      if (result) {
+        startButton.isDisable = false
+      }
+      return result
     } else {
       // assume clean directory
-      println("none")
+      val result = createDialog("info", "There is no server in this directory.\nCreate one?", "Yes", "No", true)
+      statusBar.text = "Ready."
+      return result
     }
 
     return true;