[Yan Zaiya] iP

src/main/java/Duke.java

@@ -1,10 +1,57 @@
+import java.util.Scanner;
+
 public class Duke {
+    public static String DIVIDER_LINE = "______________________________\n";
+
     public static void main(String[] args) {
         String logo = " ____        _        \n"
                 + "|  _ \\ _   _| | _____ \n"
                 + "| | | | | | | |/ / _ \\\n"
                 + "| |_| | |_| |   <  __/\n"
                 + "|____/ \\__,_|_|\\_\\___|\n";
         System.out.println("Hello from\n" + logo);
+        String greet = DIVIDER_LINE
+                + "Hello! I'm Duke\n"
+                + "What can i do for you\n"
+                + DIVIDER_LINE;
+        System.out.println(greet);
+        boolean shouldContinue = true;
+        Scanner in = new Scanner(System.in);
+        //String[] tasks = new String[100];
+        int taskCount = 0;
+        String action;
+        Task[] tasks = new Task[100];
+        while (shouldContinue) {
+            action = in.nextLine();
+            if (action.equals("bye")) {
+                System.out.println(DIVIDER_LINE + "Bye. Hope to see you again soon!\n" + DIVIDER_LINE);
+                shouldContinue = false;
+            }else if (action.equals("list")) {
+                System.out.print(DIVIDER_LINE);
+                for (int i = 0; i < taskCount; i += 1) {
+                    System.out.println(Integer.toString(i + 1) + "." + "" +tasks[i].getStatusIcon()
+                            + " " +tasks[i].description);
+                }
+                System.out.println(DIVIDER_LINE);
+            }else if (action.startsWith("mark")){
+                int dividerPos = action.indexOf(" ");
+                int toBeMarked = Integer.parseInt(action.substring(dividerPos + 1)) - 1;
+                tasks[toBeMarked].markAsDone();
+                System.out.println(DIVIDER_LINE + "Nice! I've marked this task as done:\n"
+                        + tasks[toBeMarked].getStatusIcon() + " " + tasks[toBeMarked].description
+                        + "\n" + DIVIDER_LINE);
+            }else if (action.startsWith("unmark")) {
+                int dividerPos = action.indexOf(" ");
+                int toBeUnmarked = Integer.parseInt(action.substring(dividerPos + 1)) - 1;
+                tasks[toBeUnmarked].markAsUndone();
+                System.out.println(DIVIDER_LINE + "Nice! I've marked this task as undone:\n"
+                        + tasks[toBeUnmarked].getStatusIcon() + " " + tasks[toBeUnmarked].description
+                        + "\n" + DIVIDER_LINE);
+            }else {
+                tasks[taskCount] = new Task(action);
+                taskCount += 1;
+                System.out.println(DIVIDER_LINE + "added: " + action + "\n" + DIVIDER_LINE);
+            }
+        }
     }
 }

src/main/java/Task.java

@@ -0,0 +1,23 @@
+public class Task {
+    protected String description;
+    protected boolean isDone;
+
+    public Task(String description) {
+        this.description = description;
+        this.isDone = false;
+    }
+
+    public String getStatusIcon() {
+        return (isDone ? "[X]" : "[ ]"); // mark done task with X
+    }
+
+    public void markAsDone() {
+        this.isDone = true;
+    }
+
+    public void markAsUndone() {
+        this.isDone = false;
+    }
+
+    //...
+}