/* Objective: Since Windows 10 File Explorer search seems messed-up on my laptop 
(and computers of at least some others reporting online) since late 2019,
try to make something for finding files/folders on my laptop while waiting for a fix!
First just look at file/folder names (might include option to match text within files later)

Now naming new intermediates/iterations/versions, after initial 10 just named FindFileOrFolder, 
with _vX suffixes, so this is...
v1 (first version uploaded to website) 8Jan2020

--Dealt with the issue that prog displays temporary as well as regular files, I hope
...think excluding via Files.isHidden(...) works
--Also changed the text in the depth button

 */

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Insets;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

class FindFileOrFolder_v1
{
    int walkDepth = 1; // --specifies how many subdirectory levels to go down when collecting files to access
                       //   initialized to default 1 (do not look in subdirectories)
        
    // GUI components...
    JFrame frame = new JFrame("FindFileOrFolder"); // which contains all the other GUI components... 
    JPanel panelForInput = new JPanel(new BorderLayout());
    JPanel panelForButtonsAndOutput = new JPanel(new BorderLayout()); 
    JPanel panelForStartComponents = new JPanel(new BorderLayout());
    JPanel panelForTargetComponents = new JPanel(new BorderLayout());
    JLabel startFolderJLabel = new JLabel("  Enter the path of the folder from within which you want to (start your) search..."); 
    JLabel targetNameJLabel = new JLabel("  Enter the name or partial name of a file or folder you want to find..."); 
    JTextArea startFolderTextArea = new JTextArea(2, 60); // input to specify foolder within which to (start) searching
    JTextArea targetNameTextArea = new JTextArea(2, 60); // input to specify file/folder names for which to search       
    JButton targetButton = new JButton("Find files/folders"); 
    JButton depthButton = new JButton("Search in subfolders of the starting folder also"); 
    JTextArea dTextArea = new JTextArea(40, 100); // displays output, i.e. paths for files/folders found    

    FindFileOrFolder_v1() // constructor, called when main method runs
    {   
        panelForStartComponents.add(startFolderJLabel, BorderLayout.NORTH);      
        startFolderTextArea.setLineWrap(true); 
        startFolderTextArea.setMargin(new Insets(5, 5, 5, 5));            
        panelForStartComponents.add(new JScrollPane(startFolderTextArea), BorderLayout.SOUTH);      
        panelForInput.add(panelForStartComponents, BorderLayout.NORTH);      

        panelForTargetComponents.add(targetNameJLabel, BorderLayout.NORTH);  
        targetNameTextArea.setLineWrap(true); 
        targetNameTextArea.setMargin(new Insets(5, 5, 5, 5));            
        panelForTargetComponents.add(new JScrollPane(targetNameTextArea), BorderLayout.SOUTH);      
        panelForInput.add(panelForTargetComponents, BorderLayout.SOUTH);          
        
        targetButton.addActionListener(actionEvent ->
            { 
                dTextArea.setForeground(Color.BLACK); // (for searches following a no-valid-start-path message (red))
                dTextArea.setText(null); // (first clear results of any previous search)
                
                String startText = startFolderTextArea.getText().trim();
                Path startPath = Paths.get(startText); // path to folder within which to (start) searching
                boolean startPathValid = Files.isDirectory(startPath); // (unfortunately(?), empty string arg seems to 
                // generate path regarded as valid (root/current folder?), so fo now adding check re startText.isEmpty() below)

                if (startText.isEmpty() || !startPathValid)
                {
                    noValidStartMessage();
                }
                
                final String target = targetNameTextArea.getText(); // (partial) names of files/folders for which to search          

                if (!startText.isEmpty() && startPathValid && !target.isEmpty())
                { // only run process below if target text and valid start path have been supplied
                    try 
                    {
                        Stream<Path> targetStream = Files.find(startPath, walkDepth,
                                (p,a) -> 
                                        !isHiddenHandler(p) && // --i11 added to exclude hidden files (temporary etc)
                                        p.getFileName().toString().contains(target)); 

                        targetStream.forEach(p -> dTextArea.append(p.toString() + "\n")); // print paths found in output/display area                        
                    }
                    catch (IOException ex)
                    {
                        if (ex.getClass().getName().equals("java.nio.file.NoSuchFileException"))          
                        {
                            noValidStartMessage();
                        } // --probably not needed now, though, as should not get to try clause without valid start path         
                    } 
                }
                
            } 
        );         
        targetButton.setMargin(new Insets(10, 10, 10, 10));
        targetButton.setFont(new Font("SansSerif", Font.BOLD, 20));         
        panelForButtonsAndOutput.add(targetButton, BorderLayout.NORTH);         
        
        depthButton.addActionListener(actionEvent ->
            {                      
                if (walkDepth == 1)
                {
                    walkDepth = Integer.MAX_VALUE;
//                    depthButton.setText("Do not include subdirectories");
                    depthButton.setText("Search in the starting folder only");
                }                           
                else // (walkDepth is Integer.MAX_VALUE)
                {
                    walkDepth = 1;
//                    depthButton.setText("Include subdirectories");        
                    depthButton.setText("Search in subfolders of the starting folder also");
                }
            } 
        ); // toggles walk dept between no-subfolders and all-subfolders)
        panelForInput.add(depthButton, BorderLayout.CENTER);   

        dTextArea.setEditable(false);
        dTextArea.setLineWrap(true); 
        dTextArea.setMargin(new Insets(5, 5, 5, 5)); 
        panelForButtonsAndOutput.add(new JScrollPane(dTextArea), BorderLayout.SOUTH); 
        
        frame.add(panelForInput, BorderLayout.NORTH); 
        frame.add(panelForButtonsAndOutput, BorderLayout.SOUTH); 
        frame.setResizable(false); // (buttons disappear if user drags frame bottom up, 
        // while if it's dragged down, the extra space just appears as a gap between the panels;
        // so best thing fot the moment is just to hard-code big dTextArea;
        // looking briefly online, see descriptions/code for how to make rezizable by dragging, but not trivial
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
        frame.pack(); // (may need to keep this positioned last)
    }
    
    void noValidStartMessage() // puts message in display area if no valid start path is supplied
    {
        dTextArea.setForeground(Color.red);
        dTextArea.setText("No valid start path supplied");
    }
    
    
    // --i11 added as Files.isHidden(...) throws checked exception so awkward when called directly in stream above
    boolean isHiddenHandler (Path p)
    {
        boolean result = false;
        
        try
        {
            result = Files.isHidden(p);
        } 
        catch (IOException ex)
        {
            System.out.println(ex);
        }
        
        return result;
    }
    
    
    
    public static void main(String[] args)
    {   
        new FindFileOrFolder_v1();  
    }

}