[Liu Ze Hui] iP

src/main/java/Duke.java

@@ -1,10 +1,58 @@
+import java.util.Scanner;
+//so scanner class can be used
+
 public class Duke {
-    public static void main(String[] args) {
-        String logo = " ____        _        \n"
-                + "|  _ \\ _   _| | _____ \n"
-                + "| | | | | | | |/ / _ \\\n"
-                + "| |_| | |_| |   <  __/\n"
-                + "|____/ \\__,_|_|\\_\\___|\n";
+    public static void printLine() {
+        System.out.println("________________________________________");
+    }
+    public static void printShortLine() {
+        System.out.println("_____________");
+    }
+    public static void printHello() {
+        String logo =
+                "__   __   ___    _____ \n"
+                        + "\\ \\ / /  / _ \\  | ___ |\n"
+                        + " \\ Y /  | | | |     | | \n"
+                        + "  \\ /   | | | |     | | \n"
+                        + "  | |   | |_| |  ___| | \n"
+                        + "  |_|    \\___/  |____/          \n";
+        printLine();
         System.out.println("Hello from\n" + logo);
+        System.out.println("Hello! I'm YOJ");
+        System.out.println("What can I do for you?");
+        printLine();
+    }
+
+    public static void main(String[] args) {
+        printHello();
+        // get user input
+        Scanner in = new Scanner(System.in);
+        String userInput;
+        userInput = in.nextLine();
+
+        while(!userInput.equals("bye")) {
+            printShortLine();
+            System.out.println("added: " + userInput);
+            printLine();
+            if (userInput.equals("list")) {
+                Task.printList();
+            } else if(userInput.matches("mark \\d+")) {
+                String[] taskIndex = userInput.split(" ");
+                int index = Integer.parseInt(taskIndex[1]);
+                Task.markDone(index-1);
+                System.out.println("Nice! I've marked this task as done:");
+                System.out.println("  [X] " + Task.tasks[index-1]);
+            } else if(userInput.matches("unmark \\d+")) {
+                String[] taskIndex = userInput.split(" ");
+                int index = Integer.parseInt(taskIndex[1]);
+                Task.markUndone(index-1);
+                System.out.println("OK, I've marked this task as not done yet:");
+                System.out.println("  [ ] " + Task.tasks[index-1]);
+            } else {
+                Task.addTask(userInput);
+            }
+            userInput = in.nextLine();
+        }
+        System.out.println("Bye. Hope to see you again soon!");
     }
 }

src/main/java/Task.java

@@ -0,0 +1,32 @@
+public class Task {
+    protected static String[] tasks = new String[100];
+    protected static boolean[] tasksCompleted = new boolean[100];
+    protected static int taskNumber;
+
+    public Task() {
+        taskNumber = 0;
+    }
+
+    public static void addTask(String userInput) {
+        tasks[taskNumber] = userInput;
+        tasksCompleted[taskNumber] = false;
+        taskNumber++;
+    }
+    public static void markDone(int taskNumber) {
+        tasksCompleted[taskNumber] = true;
+    }
+
+    public static void markUndone(int taskNumber) {
+        tasksCompleted[taskNumber] = false;
+    }
+    public static String getStatusIcon(int taskNumber) {
+        return (tasksCompleted[taskNumber] ? "X" : " "); // mark done task with X
+    }
+
+    public static void printList() {
+        for(int i = 0; i < taskNumber; i++) {
+            System.out.println(i+1 + ". [" + getStatusIcon(i) + "] " + tasks[i]);
+        }
+        Duke.printLine();
+    }
+}