129 lines
3.5 KiB
Java
129 lines
3.5 KiB
Java
package app.service;
|
|
|
|
import java.io.File;
|
|
import java.io.FileNotFoundException;
|
|
import java.io.PrintWriter;
|
|
import java.nio.file.Path;
|
|
import java.util.NoSuchElementException;
|
|
import java.util.Optional;
|
|
import java.util.Scanner;
|
|
|
|
import app.model.Model;
|
|
import javafx.stage.Stage;
|
|
|
|
/**
|
|
* A class containing operations and logic for choosing, reading and writing to files.
|
|
*/
|
|
public class FileOperations {
|
|
|
|
private FileOperations() {}
|
|
|
|
/**
|
|
* A function to get a file through a dialog
|
|
*
|
|
* @param stage A JavaFX stage is required to show the dialog
|
|
* @return The chosen file
|
|
* @throws FileNotFoundException if the dialog was canceled
|
|
*/
|
|
public static File openFileWithDialog(Stage stage) throws FileNotFoundException {
|
|
File chosenFile = DialogBoxes.showopenFileWithDialog(stage);
|
|
|
|
if (chosenFile == null)
|
|
throw new FileNotFoundException();
|
|
|
|
return chosenFile;
|
|
|
|
}
|
|
|
|
/**
|
|
* A function to get directory through a dialog
|
|
*
|
|
* @param stage A JavaFX stage is required to show the dialog
|
|
* @return The chosen directory
|
|
* @throws FileNotFoundException if the dialog was canceled
|
|
*/
|
|
public static File openDirectoryWithDialog(Stage stage) throws FileNotFoundException {
|
|
File dir = DialogBoxes.showOpenDirectoryWithDialog(stage);
|
|
|
|
if (dir == null)
|
|
throw new FileNotFoundException();
|
|
|
|
return dir;
|
|
}
|
|
|
|
/**
|
|
* Saves a file a the specified filepath with the specified content.
|
|
* Shows an error message to the user if the file was not found at the specified location.
|
|
*
|
|
* @param filepath The path of the file to save the content into
|
|
* @param content The text content to be saved
|
|
* @return Whether the file was sucessfully saved
|
|
*/
|
|
public static boolean saveFile(Path filepath, String content) {
|
|
try (PrintWriter writer = new PrintWriter(filepath.toFile())) {
|
|
writer.println(content);
|
|
return true;
|
|
|
|
} catch (FileNotFoundException ex) {
|
|
DialogBoxes.showErrorMessage("Could not save file at \n" + filepath.toString());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Lets the user choose a file to save the specified content into
|
|
*
|
|
* @param stage A JavaFX stage is needed in order to show the file chooser
|
|
* @param content The content to be saved
|
|
*
|
|
* @return Whether the file was sucessfully saved
|
|
*/
|
|
public static boolean saveFileWithDialog(Stage stage, String content) {
|
|
File chosenLocation;
|
|
|
|
try {
|
|
chosenLocation = DialogBoxes.showSaveFileWithDialog(stage);
|
|
} catch (NoSuchElementException e) {
|
|
return false;
|
|
}
|
|
|
|
if (chosenLocation == null) return false;
|
|
|
|
if (saveFile(chosenLocation.toPath(), content)) {
|
|
Model.setActiveFilePath(Optional.of(chosenLocation.toPath()));
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Tries to read the contents of a file in the specified filepath.
|
|
* If it fails, it shows the user a corresponding error message.
|
|
*
|
|
* @param filePath The path of the file to be read
|
|
*
|
|
* @return The text content of the file
|
|
*/
|
|
public static String readFile(Path filePath) {
|
|
|
|
if (filePath == null)
|
|
return "";
|
|
|
|
String result = "";
|
|
|
|
try (Scanner sc = new Scanner(filePath.toFile())) {
|
|
while (sc.hasNextLine()) {
|
|
result += (sc.nextLine() + "\n");
|
|
}
|
|
|
|
} catch (FileNotFoundException e) {
|
|
DialogBoxes.showErrorMessage("This file could not be opened!");
|
|
System.err.println("[ERROR] File could not be opened: " + filePath.toString());
|
|
System.err.print(e);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
}
|