import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.util.HashMap;

import java.util.Map;

public class DigitalLibrarySystem extends Frame {

private TextField titleField, authorField, filePathField, searchField;

private TextArea displayArea, searchResultArea;

private Map<String, BookMetadata> library;

public DigitalLibrarySystem() {

library = new HashMap<>();

setTitle("Digital Library System");

setSize(600, 500);

setLayout(new BorderLayout());

// Panel for input fields and buttons

Panel topPanel = new Panel(new GridLayout(3, 1));

// Row 1: Title and Author

Panel row1 = new Panel(new FlowLayout());

titleField = new TextField(10);

authorField = new TextField(10);

row1.add(new Label("Title:"));

row1.add(titleField);

row1.add(new Label("Author:"));

row1.add(authorField);

// Row 2: File Path for upload

Panel row2 = new Panel(new FlowLayout());

filePathField = new TextField(20);

row2.add(new Label("File Path:"));

row2.add(filePathField);

// Row 3: Operation buttons and Search

Panel row3 = new Panel(new FlowLayout());

Button uploadButton = new Button("Upload");

Button downloadButton = new Button("Download");

Button readButton = new Button("Read Book");

Button searchButton = new Button("Search Content");

Button searchMetadataButton = new Button("Search Metadata");

searchField = new TextField(10);

uploadButton.addActionListener(e -> uploadBook());

downloadButton.addActionListener(e -> downloadBook());

readButton.addActionListener(e -> readBook());

searchButton.addActionListener(e -> searchContent());

searchMetadataButton.addActionListener(e -> searchMetadata());

row3.add(uploadButton);

row3.add(downloadButton);

row3.add(readButton);

row3.add(new Label("Search Keyword:"));

row3.add(searchField);

row3.add(searchButton);

row3.add(searchMetadataButton);

// Add rows to top panel

topPanel.add(row1);

topPanel.add(row2);

topPanel.add(row3);

add(topPanel, BorderLayout.NORTH);

// Panel for display areas

Panel middlePanel = new Panel(new BorderLayout());

displayArea = new TextArea(10, 50);

searchResultArea = new TextArea(5, 50);

searchResultArea.setEditable(false);

displayArea.setEditable(false);

middlePanel.add(new Label("Search Results:"), BorderLayout.NORTH);

middlePanel.add(searchResultArea, BorderLayout.CENTER);

middlePanel.add(displayArea, BorderLayout.SOUTH);

add(middlePanel, BorderLayout.CENTER);

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

dispose();

}

});

}

private void uploadBook() {

String title = titleField.getText();

String author = authorField.getText();

String filePath = filePathField.getText();

try (BufferedReader reader = new BufferedReader(new FileReader(filePath));

FileWriter writer = new FileWriter(title + ".txt")) {

String line;

while ((line = reader.readLine()) != null) {

writer.write(line + "\n");

}

library.put(title, new BookMetadata(title, author, title + ".txt"));

displayArea.setText("Book uploaded successfully: " + title);

} catch (IOException e) {

displayArea.setText("Error uploading book: " + e.getMessage());

}

}

private void downloadBook() {

String title = titleField.getText();

if (!library.containsKey(title)) {

displayArea.setText("Book not found in library.");

return;

}

String filePath = library.get(title).getFilePath();

StringBuilder content = new StringBuilder();

try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {

String line;

while ((line = reader.readLine()) != null) {

content.append(line).append("\n");

}

displayArea.setText("Downloaded Book Content:\n" + content);

} catch (IOException e) {

displayArea.setText("Error downloading book: " + e.getMessage());

}

}

private void readBook() {

String title = titleField.getText();

if (!library.containsKey(title)) {

displayArea.setText("Book not found in library.");

return;

}

String filePath = library.get(title).getFilePath();

StringBuilder content = new StringBuilder();

try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {

String line;

while ((line = reader.readLine()) != null) {

content.append(line).append("\n");

}

displayArea.setText("Read Book Content:\n" + content);

} catch (IOException e) {

displayArea.setText("Error reading book: " + e.getMessage());

}

}

private void searchContent() {

String keyword = searchField.getText();

String title = titleField.getText();

if (!library.containsKey(title)) {

displayArea.setText("Book not found in library.");

return;

}

String filePath = library.get(title).getFilePath();

StringBuilder result = new StringBuilder("Search Results:\n");

boolean found = false;

try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {

String line;

while ((line = reader.readLine()) != null) {

if (line.contains(keyword)) {

result.append(line).append("\n");

found = true;

}

}

if (!found) {

searchResultArea.setText("No matches found for keyword: " + keyword);

} else {

searchResultArea.setText(result.toString());

}

} catch (IOException e) {

displayArea.setText("Error searching content: " + e.getMessage());

}

}

private void searchMetadata() {

String keyword = searchField.getText().toLowerCase();

StringBuilder result = new StringBuilder("Metadata Search Results:\n");

boolean found = false;

for (BookMetadata book : library.values()) {

if (book.getTitle().toLowerCase().contains(keyword) || book.getAuthor().toLowerCase().contains(keyword)) {

result.append("Title: ").append(book.getTitle()).append("\n");

result.append("Author: ").append(book.getAuthor()).append("\n");

result.append("File Path: ").append(book.getFilePath()).append("\n\n");

found = true;

}

}

if (!found) {

searchResultArea.setText("No books found matching the search criteria.");

} else {

searchResultArea.setText(result.toString());

}

}

public static void main(String[] args) {

DigitalLibrarySystem librarySystem = new DigitalLibrarySystem();

librarySystem.setVisible(true);

}

class BookMetadata {

private String title;

private String author;

private String filePath;

public BookMetadata(String title, String author, String filePath) {

this.title = title;

this.author = author;

this.filePath = filePath;

}

public String getTitle() {

return title;

}

public String getAuthor() {

return author;

}

public String getFilePath() {

return filePath;

}

}

}