Main.java

//package sample;

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;
import javafx.scene.layout.*;
import javafx.event.ActionEvent;
import javafx.stage.FileChooser;
import javafx.stage.DirectoryChooser;
import javafx.stage.FileChooser.ExtensionFilter;
import javafx.event.EventHandler;
import javafx.scene.control.*;
import javafx.scene.control.Alert.AlertType;
import java.io.BufferedReader;
import java.io.*;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextArea;
import java.io.FileReader;
import java.time.LocalDate;
import java.util.Optional;
public class Main extends Application implements  EventHandler<ActionEvent>{
    String textUponOpen = "";
    String textBeforeExit = "";
    String path = "";

    public static int windowNum = 1;

    TextArea text = new TextArea();
    public void start(Stage s) {


        //Creates a text box object
        //JTextArea text;

        //creates the frame gui object
        s.setTitle("Decaf Code Editor");






        //-----------------First menu tab file-------------------//
        Menu file = new Menu("File");
        MenuItem newB = new MenuItem("New");
        MenuItem open = new MenuItem("Open");
        MenuItem save = new MenuItem("Save");
        MenuItem saveAs = new MenuItem("Save As");
        MenuItem Remove = new MenuItem("Remove File");
        MenuItem exit = new MenuItem("Exit");

        file.getItems().add(newB);
        file.getItems().add(open);
        file.getItems().add(save);
        file.getItems().add(saveAs);
        file.getItems().add(Remove);
        file.getItems().add(exit);

        newB.setOnAction(this); //action listoners
        open.setOnAction(this);
        save.setOnAction(this);
        saveAs.setOnAction(this);
        Remove.setOnAction(this);
        exit.setOnAction(this);
        //-----------------------------------------------------------//
        //-----------------First menu tab file-------------------//
        Menu Edit = new Menu("Edit");
        MenuItem Cut = new MenuItem("Cut");
        MenuItem Copy = new MenuItem("Copy");
        MenuItem Paste = new MenuItem("Paste");

        Edit.getItems().add(Cut);
        Edit.getItems().add(Copy);
        Edit.getItems().add(Paste);

        Cut.setOnAction(this); //action listoners
        Copy.setOnAction(this);
        Paste.setOnAction(this);

        //-----------------------------------------------------------//
        //----------------- Compile tab-------------------//
        Menu Compile = new Menu("Compile");
        MenuItem Build = new MenuItem("Build");
        Compile.getItems().add(Build);
        Compile.setOnAction(this);
        //-----------------------------------------------------------//
        //----------------- Execute tab-------------------//
        Menu Execute = new Menu("Execute");
        // Execute.getItems().add(Execute);
        //-----------------------------------------------------------//

        MenuBar mb = new MenuBar();

        // add menu to menubar
        mb.getMenus().add(file);
        mb.getMenus().add(Edit);
        mb.getMenus().add(Compile);
        mb.getMenus().add(Execute);
        // create a VBox
        VBox vb = new VBox(mb);

        text.setPrefHeight(1000);
        text.setPrefWidth(1000);
        vb.getChildren().add(text);
        Scene sc = new Scene(vb, 500,500);
        // set the scene
        s.setScene(sc);

        s.show();



    }



    void saveFile()
    {
        if (!path.equals(""))
        {
            try//checks if the file is able to open and not invalid
            {
                File file = new File(path);

                BufferedWriter writeb = new BufferedWriter(new FileWriter(file)); //creates the file with a .java extension

                writeb.write(text.getText()); //gets the text that is inputed

                writeb.flush();
                writeb.close(); //closes the file
                textUponOpen = text.getText();
            }
            catch(Exception evt)
            {
                Alert warning = new Alert(AlertType.ERROR);
                warning.setTitle("Decaf");
                warning.setHeaderText(path);
                warning.setContentText("There is nothing in the file to save");

                warning.showAndWait();
            }
        }

        else
        {
            saveAsFile();
        }

    }

    public void exitOptions() {//Need to fix thie exit command because it doesn't close the window

        textBeforeExit = text.getText();

        if (textUponOpen.equals(textBeforeExit)) {//no changes have been made, don't need to prompt extra save

            //System.exit(0);
            Stage newStage = new Stage();
            newStage.close();
            windowNum--;

            //check if more than one window is open
        }
        else{

            //Changes have been made, prompt user to save
            Alert warning = new Alert(AlertType.CONFIRMATION);
            warning.setTitle("Confirmation Dialog");
            warning.setHeaderText("Memory loss warning");
            warning.setContentText("You've changed your document. Would you like to save before exiting?");
            Optional<ButtonType> entry = warning.showAndWait();
            if (entry.get() == ButtonType.YES) {
                //reroute to save

                saveFile();





            } else if (entry.get() == ButtonType.NO) {


                //System.exit(0);

                windowNum--;
            }
            else
            {
                Stage newStage = new Stage();
                newStage.close();
            }
        }
        if(windowNum == 0){
            System.exit(0);
        }
    }
    public void RemoveFile()
    {
        FileChooser jfc = new FileChooser();//directs user to home directory
        jfc.setTitle("Select a java file");//dialog for selecting file will say choose file
        jfc.setInitialDirectory(new File("."));
        jfc.getExtensionFilters().addAll(new ExtensionFilter("Java (.java)", "*.java"));
        File returnValue = jfc.showOpenDialog(null);

        if (returnValue != null)
        {


            Alert warning = new Alert(Alert.AlertType.CONFIRMATION);
            warning.setTitle("File Warning");
            warning.setHeaderText("The file you selected "+returnValue.getName()+" will be deleted");
            warning.setContentText("Are you sure you want to delete " +returnValue.getName());
            Optional<ButtonType> entry = warning.showAndWait();

            if (entry.get() == ButtonType.OK)
            {

                returnValue.delete();//deletes the file
                Alert warning2 = new Alert(AlertType.INFORMATION);
                warning2.setTitle("Confirmation");
                warning2.setHeaderText("The file you selected "+returnValue.getName()+" has been deleted ");
                warning2.setContentText("Please hit the Ok button to close the dialog");
                warning2.showAndWait();


            }
        }
        /*else
        {
            Alert warning = new Alert(AlertType.INFORMATION);
            warning.setTitle("Decaf");
            warning.setHeaderText("File cancelation");
            warning.setContentText("No file was selected to delete");
            warning.showAndWait();
        }*/

    }
    void saveAsFile(){
        //ToDo: Implement save so you can save changes to the same file repeatedly
        //Save currently only works as a "Save as"
        //If you type into a file and save it, then exit and come back, it definitely saves
        //But if you want to make changes to that already-saved file, you can't. You'll have to save it as a diff version.


        FileChooser jfc = new FileChooser();//directs user to home directory
        jfc.setTitle("Save as java file");//dialog for selecting file will say choose file
        jfc.setInitialDirectory(new File("."));
        jfc.getExtensionFilters().addAll(new ExtensionFilter("Java (.java)", "*.java"));
        File returnValue = jfc.showSaveDialog(null);
        if (returnValue !=null)
        {//input here a file read so that it can open and read the file

            try//checks if the file is able to open and not invalid
            {


                File file = jfc.getInitialDirectory();//gets the file name
                path = file.getPath();//gets the path of the file
                if(!path.toLowerCase().endsWith(".java"))//if the file isn't a java script then create the file
                {
                    file = new File(path + ".java");
                    BufferedWriter writeb = new BufferedWriter(new FileWriter(returnValue)); //creates the file with a .java extension


                    writeb.write(text.getText()); //gets the text that is inputed

                    writeb.flush();
                    writeb.close(); //closes the file
                }
                textUponOpen = text.getText();



            }
            catch(Exception evt)
            {
                Alert warning = new Alert(AlertType.ERROR);
                warning.setTitle("Decaf");
                warning.setHeaderText("File error");
                warning.setContentText("There is nothing in the file to save");

                warning.showAndWait();
            }
        }
        //else {
        //    JOptionPane.showMessageDialog(title, "You canceled to save a file"); //message appears when canceling
        //}
    }
    @Override
    public void handle(ActionEvent event)
    {
        String in = ((MenuItem)event.getSource()).getText();
        if(in.equals("Open"))
        {
            FileChooser jfc = new FileChooser();//directs user to home directory
            jfc.setTitle("Select a java file");//dialog for selecting file will say choose file
            jfc.setInitialDirectory(new File("."));
            jfc.getExtensionFilters().addAll(new ExtensionFilter("Java (.java)", "*.java"));
            File returnValue = jfc.showOpenDialog(null);
            if (returnValue != null)
            {



                //File select = new File(jfc.getInitialDirectory().getAbsolutePath()); //finds selected file so that it be open
                try
                {
                    //File file = returnValue.getAbsolutePath();//gets the file name
                    path = returnValue.getAbsolutePath();//gets the path of the file
                    String Line = "";
                    FileReader read = new FileReader(returnValue);//reads the file that is being open
                    BufferedReader input = new BufferedReader(read);//shows the input of what the user used
                    text.setText("");
                    while ((Line = input.readLine()) != null) //reads the line
                    {


                        text.appendText(Line);//appends the text
                        text.appendText("\n");//creates a new line


                    }

                    input.close(); //closes the file
                }
                catch(Exception evt)
                {
                    Alert warning = new Alert(AlertType.ERROR);
                    warning.setTitle("Decaf");
                    warning.setHeaderText("File error");
                    warning.setContentText("No such file exists to open");

                    warning.showAndWait();

                }
            }
            textUponOpen = text.getText();
        }
        else if(in.equals("Remove File"))//Removes a file
        {
            RemoveFile();
        }
        else if (in.equals("Save As"))//saves only java files
        {
            saveAsFile();
        }
        else if (in.equals("Save")){
            saveFile();
        }
        else if (in.equals("Exit"))
        {
            exitOptions();
        }
        else if (in.equals("Cut"))
        {
            text.cut(); //cuts the text
        }
        else if (in.equals("New"))
        {

        }
        else if (in.equals("Copy"))
        {
            text.copy(); //copies text
        }
        else if (in.equals("Paste"))
        {
            text.paste(); //paste the text
        }


    }

    public static void main(String[] args) {
        launch(args);
    }
}

/*TODO:
    - fix save if file is created from open function
    -
 */