FileManager

package fileManagerAssignment;

import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class FileManager {

    private List<File> files = new ArrayList<>();
    private Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        FileManager fileManager = new FileManager();
        fileManager.run();
    }

    public void run() {
        int choice;
        do {
            displayDateTime();
            displayMainMenu();
            choice = scanner.nextInt();
            scanner.nextLine(); 
            switch (choice) {
                case 1:
                    displayCreateMenu();
                    break;
                case 2:
                    displayDeleteMenu();
                    break;
                case 3:
                    displayRenameMenu();
                    break;
                case 4:
                    viewAllFiles();
                    break;
                case 5:
                    editFile();
                    break;
                case 6:
                    displayFile();
                    break;
                case 0:
                    System.out.println("Exiting...");
                    break;
                default:
                    System.out.println("Invalid choice. Please try again.");
            }
        } while (choice != 0);
    }

    private void displayDateTime() {
        LocalDate currentDate = LocalDate.now();
        LocalTime currentTime = LocalTime.now();
        System.out.println("Date: " + currentDate + "    Time: " + currentTime);
    }

    private void displayMainMenu() {
        System.out.println("\t"+"File Manager");
        System.out.println("1. Create Folder or File");
        System.out.println("2. Delete Folder or File");
        System.out.println("3. Rename Folder or File");
        System.out.println("4. View all Files");
        System.out.println("5. Edit File");
        System.out.println("6. Display File");
        System.out.println("\n"+"0. Exit");
        System.out.print("\n"+"Enter your choice: ");
    }

    private void displayCreateMenu() {
        System.out.println("Create Folder/ File");
        displayDateTime();
        System.out.println("1. New Folder");
        System.out.println("2. New File");
        System.out.println("0. Back to previous page");
        System.out.print("Enter your choice: ");

        int choice = scanner.nextInt();
        scanner.nextLine(); 

        switch (choice) {
            case 1:
                createNewFolder();
                break;
            case 2:
                createNewFile();
                break;
            case 0:
                break;
            default:
                System.out.println("Invalid choice. Please try again.");
        }
    }

    private void createNewFolder() {
        System.out.print("Enter new folder name: ");
        String folderName = scanner.nextLine();
        java.io.File folder = new java.io.File(folderName);
        if (folder.mkdirs()) {
            System.out.println("Folder created successfully. Modified date: " + LocalDate.now());
        } else {
            System.out.println("Failed to create folder.");
        }
    }

    private void createNewFile() {
        System.out.print("Enter new file name: ");
        String fileName = scanner.nextLine();
        System.out.print("Do you want to save it in a folder (yes/no): ");
        String saveInFolder = scanner.nextLine();

        if (saveInFolder.equalsIgnoreCase("yes")) {
            System.out.print("Enter folder name: ");
            String folderName = scanner.nextLine();
            java.io.File folder = new java.io.File(folderName);
            if (!folder.exists()) {
                folder.mkdirs();
            }
            fileName = folderName + "/" + fileName;
        }

        try (FileWriter writer = new FileWriter(fileName + ".txt")) {
            System.out.print("Enter content for the file: ");
            String content = scanner.nextLine();
            writer.write(content);
            System.out.println("File created successfully. Modified date: " + LocalDate.now());
        } catch (IOException e) {
            System.out.println("An error occurred while creating the file.");
            e.printStackTrace();
        }
    }

    private void displayDeleteMenu() {
        System.out.println("Delete Folder/ File");
        displayDateTime();
        System.out.println("1. Delete Folder");
        System.out.println("2. Delete File");
        System.out.println("0. Back to previous page");
        System.out.print("Enter your choice: ");

        int choice = scanner.nextInt();
        scanner.nextLine();  

        switch (choice) {
            case 1:
                deleteFolder();
                break;
            case 2:
                deleteFile();
                break;
            case 0:
                break;
            default:
                System.out.println("Invalid choice. Please try again.");
        }
    }

    private void deleteFolder() {
        System.out.print("Enter the name of the folder to be deleted: ");
        String folderName = scanner.nextLine();
        java.io.File folder = new java.io.File(folderName);
        if (folder.exists() && folder.isDirectory()) {
            if (deleteDirectoryRecursively(folder)) {
                System.out.println("Folder deleted successfully.");
            } else {
                System.out.println("Failed to delete folder.");
            }
        } else {
            System.out.println("Folder does not exist.");
        }
    }

    private boolean deleteDirectoryRecursively(java.io.File directory) {
        java.io.File[] allContents = directory.listFiles();
        if (allContents != null) {
            for (java.io.File file : allContents) {
                if (file.isDirectory()) {
                    deleteDirectoryRecursively(file);
                } else {
                    if (!file.delete()) {
                        System.out.println("Failed to delete file: " + file.getPath());
                        return false;
                    }
                }
            }
        }
        return directory.delete();
    }

    private void deleteFile() {
        System.out.print("Enter the full path of the file to be deleted (including folder name if applicable): ");
        String fileName = scanner.nextLine();
        
        java.io.File file = new java.io.File(fileName);
        
        if (file.exists() && file.isFile()) {
            if (file.delete()) {
                System.out.println("File deleted successfully.");
            } else {
                System.out.println("Failed to delete file.");
            }
        } else {
            System.out.println("File does not exist or is not a file.");
        }
    }

    private void displayRenameMenu() {
        System.out.println("Rename Folder/ File");
        displayDateTime();
        System.out.println("1. Rename Folder");
        System.out.println("2. Rename File");
        System.out.println("0. Back to previous page");
        System.out.print("Enter your choice: ");

        int choice = scanner.nextInt();
        scanner.nextLine(); 

        switch (choice) {
            case 1:
                renameFolder();
                break;
            case 2:
                renameFile();
                break;
            case 0:
                break;
            default:
                System.out.println("Invalid choice. Please try again.");
        }
    }

    private void renameFolder() {
        System.out.print("Enter the current folder name: ");
        String oldFolderName = scanner.nextLine();
        System.out.print("Enter the new folder name: ");
        String newFolderName = scanner.nextLine();
        java.io.File oldFolder = new java.io.File(oldFolderName);
        java.io.File newFolder = new java.io.File(newFolderName);
        if (oldFolder.renameTo(newFolder)) {
            System.out.println("Folder renamed successfully.");
        } else {
            System.out.println("Failed to rename folder.");
        }
    }

    private void renameFile() {
        System.out.print("Enter the current file name: ");
        String oldFileName = scanner.nextLine();
        System.out.print("Enter the new file name: ");
        String newFileName = scanner.nextLine();
        java.io.File oldFile = new java.io.File(oldFileName + ".txt");
        java.io.File newFile = new java.io.File(newFileName + ".txt");
        if (oldFile.renameTo(newFile)) {
            System.out.println("File renamed successfully.");
        } else {
            System.out.println("Failed to rename file.");
        }
    }

    private void viewAllFiles() {
        System.out.println("All Files");
        displayDateTime();
        try {
            Files.walk(Paths.get(".")) 
                .filter(Files::isRegularFile) // Filters to include only regular files
                .filter(path -> path.toString().endsWith(".txt")) // Filters to include only .txt files
                .forEach(path -> {
                    try {
                        System.out.println(path.getFileName() +"\n"+ "(Modified on " + Files.getLastModifiedTime(path) + ")");
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                });
        } catch (IOException e) {
            System.out.println("An error occurred while listing the files.");
            e.printStackTrace();
        }
    }

    private void editFile() {
        System.out.print("Enter the full path of the file to edit (including folder name if applicable): ");
        String fileName = scanner.nextLine();
        try (FileWriter writer = new FileWriter(fileName + ".txt", true)) {
            System.out.print("Enter content to append to the file: ");
            String content = scanner.nextLine();
            writer.write(content);
            System.out.println("File edited successfully. Modified date & time: " + LocalDate.now() + " " + LocalTime.now());
        } catch (IOException e) {
            System.out.println("An error occurred while editing the file.");
            e.printStackTrace();
        }
    }
    
    private void displayFile() {
        System.out.print("Enter the file name to display: ");
        String fileName = scanner.nextLine();
        try {
            String content = Files.readString(Paths.get(fileName + ".txt"));
            System.out.println("File content:");
            System.out.println(content);
        } catch (IOException e) {
            System.out.println("An error occurred while reading the file.");
            e.printStackTrace();
        }
    }
    
    private void searchFile() {
        System.out.print("Enter the name of the file to search: ");
        String fileName = scanner.nextLine();
        java.io.File file = new java.io.File(fileName + ".txt");
        if (file.exists()) {
            System.out.println("File found: " + fileName + ".txt");
            System.out.println("Modified date & time: " + LocalDate.now() + " " + LocalTime.now());
        } else {
            System.out.println("File not found.");
        }
    }
    
}