[Cao] iP

src/main/java/CommandHandler.java

@@ -0,0 +1,213 @@
+package main.java;
+
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class CommandHandler {
+    Scanner sc;
+    ArrayList<Task> taskList;
+
+    public CommandHandler() {
+        this.sc = new Scanner(System.in);
+        this.taskList = new ArrayList<>();
+    }
+
+    public void handleCommand() {
+        while (true) {
+            String command = sc.next();
+            switch (command) {
+                case "bye":
+                    handleBye();
+                    return;
+                case "list":
+                    handleList();
+                    break;
+                case "done":
+                    try {
+                        handleDone();
+                    } catch (DukeException e) {
+                        System.out.println("    ____________________________________________________________");
+                        System.out.println("     " + e.getMessage());
+                        System.out.println("    ____________________________________________________________\n");
+                    }
+                    break;
+                case "delete":
+                    try {
+                        handleDelete();
+                    } catch (DukeException e) {
+                        System.out.println("    ____________________________________________________________");
+                        System.out.println("     " + e.getMessage());
+                        System.out.println("    ____________________________________________________________\n");
+                    }
+                    break;
+                case "todo":
+                    try {
+                        handleTodo();
+                    } catch (DukeException e) {
+                        System.out.println("    ____________________________________________________________");
+                        System.out.println("     " + e.getMessage());
+                        System.out.println("    ____________________________________________________________\n");
+                    }
+                    break;
+                case "deadline":
+                    try {
+                        handleDeadline();
+                    } catch (DukeException e) {
+                        System.out.println("    ____________________________________________________________");
+                        System.out.println("     " + e.getMessage());
+                        System.out.println("    ____________________________________________________________\n");
+                    }
+                    break;
+                case "event":
+                    try {
+                        handleEvent();
+                    } catch (DukeException e) {
+                        System.out.println("    ____________________________________________________________");
+                        System.out.println("     " + e.getMessage());
+                        System.out.println("    ____________________________________________________________\n");
+                    }
+                    break;
+                default:
+                    try {
+                        handleDefault();
+                    } catch (DukeException e) {
+                        System.out.println("    ____________________________________________________________");
+                        System.out.println("     " + e.getMessage());
+                        System.out.println("    ____________________________________________________________\n");
+                    }
+            }
+        }
+    }
+
+    public void handleBye() {
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Bye. Hope to see you again soon!");
+        System.out.println("    ____________________________________________________________\n");
+        return;
+    }
+
+    public void handleList() {
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Here are the tasks in your list:");
+        for (int i = 0; i < taskList.size(); i++) {
+            System.out.print("     " + (i + 1) + ".");
+            taskList.get(i).printDescription();
+        }
+        System.out.println("    ____________________________________________________________\n");
+    }
+
+    public void handleDone() throws DukeException {
+        String doneCommand = sc.nextLine();
+        int index = 0;
+        if (doneCommand.isEmpty()) {
+            throw new DukeException("\u2639 OOPS!!! I need to know the index of the task to be done!");
+        }
+        try {
+            index = Integer.parseInt(doneCommand.stripLeading());
+        } catch (NumberFormatException e) {
+            System.out.println("    ____________________________________________________________");
+            System.out.println("     \u2639 Please enter a valid integer!!");
+            System.out.println("    ____________________________________________________________\n");
+            return;
+        }
+        if (index > taskList.size()) {
+            throw new DukeException("\u2639 Your number is too large!!");
+        }
+        Task currentTask = taskList.get(index - 1);
+        currentTask.markAsDone();
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Nice! I've marked this task as done:");
+        System.out.print("     ");
+        currentTask.printDescription();
+        System.out.println("    ____________________________________________________________\n");
+    }
+
+    public void handleDelete() throws DukeException {
+        String deleteCommand = sc.nextLine();
+        int index = 0;
+        if (deleteCommand.isEmpty()) {
+            throw new DukeException("\u2639 OOPS!!! I need to know the index of the task to be deleted!");
+        }
+        try {
+            index = Integer.parseInt(deleteCommand.stripLeading());
+        } catch (NumberFormatException e) {
+            System.out.println("    ____________________________________________________________");
+            System.out.println("     \u2639 Please enter a valid integer!!");
+            System.out.println("    ____________________________________________________________\n");
+            return;
+        }
+        if (index > taskList.size()) {
+            throw new DukeException("\u2639 Your number is too large!!");
+        }
+        Task currentTask = taskList.get(index - 1);
+        taskList.remove(index - 1);
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Noted! I've removed this task:");
+        System.out.print("     ");
+        currentTask.printDescription();
+        System.out.println("     Now you have " + taskList.size() + " tasks in the list.");
+        System.out.println("    ____________________________________________________________\n");
+    }
+
+    public void handleTodo() throws DukeException {
+        String todoDescription = sc.nextLine();
+        if (todoDescription.isEmpty()) {
+            throw new DukeException("\u2639 OOPS!!! The description of a todo cannot be empty.");
+        }
+        Todo todo = new Todo(todoDescription);
+        taskList.add(todo);
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Got it. I've added this task:");
+        System.out.print("       ");
+        todo.printDescription();
+        System.out.println("     Now you have " + taskList.size() + " tasks in the list.");
+        System.out.println("    ____________________________________________________________\n");
+    }
+
+    public void handleDeadline() throws DukeException {
+
+        String deadlineCommand = sc.nextLine();
+        if (deadlineCommand.isEmpty()) {
+            throw new DukeException("\u2639 OOPS!!! The description of a deadline cannot be empty.");
+        }
+        if (!deadlineCommand.contains("/by")) {
+            throw new DukeException("\u2639 OOPS!!! The timing of a deadline cannot be empty.");
+        }
+        String[] strings = deadlineCommand.split("/by");
+        String deadlineDescription = strings[0];
+        String time = strings[1];
+        Deadline deadline = new Deadline(deadlineDescription, time);
+        taskList.add(deadline);
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Got it. I've added this task:");
+        System.out.print("        ");
+        deadline.printDescription();
+        System.out.println("     Now you have " + taskList.size() + " tasks in the list.");
+        System.out.println("    ____________________________________________________________\n");
+    }
+
+    public void handleEvent() throws DukeException{
+        String eventCommand = sc.nextLine();
+        if (eventCommand.isEmpty()) {
+            throw new DukeException("\u2639 OOPS!!! The description of an event cannot be empty.");
+        }
+        if (!eventCommand.contains("/at")) {
+            throw new DukeException("\u2639 OOPS!!! The timing of an event cannot be empty.");
+        }
+        String[] strings = eventCommand.split("/at");
+        String eventDescription = strings[0];
+        String date = strings[1];
+        Event event = new Event(eventDescription, date);
+        taskList.add(event);
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Got it. I've added this task:");
+        System.out.print("        ");
+        event.printDescription();
+        System.out.println("     Now you have " + taskList.size() + " tasks in the list.");
+        System.out.println("    ____________________________________________________________\n");
+    }
+
+    public void handleDefault() throws DukeException {
+        throw new DukeException("\u2639 OOPS!!! I'm sorry, but I don't know what that means :-(");
+    }
+}

src/main/java/Deadline.java

@@ -0,0 +1,16 @@
+package main.java;
+
+public class Deadline extends Task {
+    protected String deadline;
+
+    public Deadline(String description, String deadline) {
+        super(description);
+        this.deadline = deadline;
+    }
+
+    @Override
+    public void printDescription() {
+        System.out.println("[D][" + getStatusIcon()
+                + "]" + description + "(by:" + deadline + ")");
+    }
+}

src/main/java/Duke.java

@@ -1,10 +1,19 @@
+package main.java;
+
 public class Duke {
-    public static void main(String[] args) {
+    public static void main(String[] args){
         String logo = " ____        _        \n"
-                + "|  _ \\ _   _| | _____ \n"
+                + "|  _ \\ _   _| | _____\n"
                 + "| | | | | | | |/ / _ \\\n"
                 + "| |_| | |_| |   <  __/\n"
                 + "|____/ \\__,_|_|\\_\\___|\n";
         System.out.println("Hello from\n" + logo);
+        System.out.println("    ____________________________________________________________");
+        System.out.println("     Hello! I'm Duke\n     What can I do for you?");
+        System.out.println("    ____________________________________________________________\n");
+
+        CommandHandler commandHandler = new CommandHandler();
+        commandHandler.handleCommand();
     }
 }
+

src/main/java/DukeException.java

@@ -0,0 +1,7 @@
+package main.java;
+
+public class DukeException extends Exception {
+    public DukeException(String ErrorMessage) {
+        super(ErrorMessage);
+    }
+}

src/main/java/Event.java

@@ -0,0 +1,16 @@
+package main.java;
+
+public class Event extends Task {
+    protected String time;
+
+    public Event(String description, String time) {
+        super(description);
+        this.time = time;
+    }
+
+    @Override
+    public void printDescription() {
+        System.out.println("[E][" + getStatusIcon()
+                + "]" + description + "(at:" + time + ")");
+    }
+}

src/main/java/Task.java

@@ -0,0 +1,23 @@
+package main.java;
+
+public class Task {
+    protected String description;
+    protected boolean isDone;
+
+    public Task(String description) {
+        this.description = description;
+        this.isDone = false;
+    }
+
+    public String getStatusIcon() {
+        return (isDone ? "\u2713" : "\u2718");
+    }
+
+    public void markAsDone() {
+        this.isDone = true;
+    }
+
+    public void printDescription() {
+        System.out.println("[" + getStatusIcon() + "] " + description);
+    }
+}

src/main/java/Todo.java

@@ -0,0 +1,12 @@
+package main.java;
+
+public class Todo extends Task {
+    public Todo(String description) {
+        super(description);
+    }
+
+    @Override
+    public void printDescription() {
+        System.out.println("[T][" + getStatusIcon() + "]" + description);
+    }
+}