repl.it linkLevel-7, A-MoreOOP, A-Packages1 Implement increments Level-7, A-MoreOOP, A-Packages
Level-7: Save
Save the tasks in the hard disk automatically whenever the task list changes. Load the data from the hard disk whe Duke starts up. You may hard-code the file name and location e.g., [project_root]/data/duke.txt
The format of the file is up to you. Example:
T | 1 | read book
D | 0 | return book | June 6th
E | 0 | project meeting | Aug 6th 2-4pm
T | 1 | join sports club
A-MoreOOP: More OOP Refactor the code to extract out closely related code as classes.
Ui: deals with interactions with the userStorage: deals with loading tasks from the file and saving tasks in the fileParser: deals with making sense of the user commandTaskList: contains the task list e.g., it has operations to add/delete tasks in the listFor example, the code of the main class could look like this:
public class Duke {
private Storage storage;
private TaskList tasks;
private Ui ui;
public Duke(String filePath) {
ui = new Ui();
storage = new Storage(filePath);
try {
tasks = new TaskList(storage.load());
} catch (DukeException e) {
ui.showLoadingError();
tasks = new TaskList();
}
}
public void run() {
//...
}
public static void main(String[] args) {
new Duke("data/tasks.txt").run();
}
}
*Command classes (i.e., AddCommand, DeleteCommand, ExitCommand etc.) that inherits from an abstract Command class, so that you can write the main logic of the App as follows:
public void run() {
ui.showWelcome();
boolean isExit = false;
while (!isExit) {
try {
String fullCommand = ui.readCommand();
ui.showLine(); // show the divider line ("_______")
Command c = Parser.parse(fullCommand);
c.execute(tasks, ui, storage);
isExit = c.isExit();
} catch (DukeException e) {
ui.showError(e.getMessage());
} finally {
ui.showLine();
}
}
}