[Jingtan]iP

src/main/java/Deadline.java

@@ -0,0 +1,14 @@
+public class Deadline extends Task{
+
+    protected  String by;
+
+    public Deadline(String description,String by){
+        super(description);
+        this.by = by;
+    }
+
+    @Override
+    public String toString(){
+        return "[D]" + super.toString() + " (by: " + by + ")";
+    }
+}

src/main/java/Duke.java

@@ -1,10 +1,97 @@
+import java.util.Scanner;
 public class Duke {
+
+    private static Task[] tasks = new Task[100];
+    private static int taskCount = 0;
+
     public static void main(String[] args) {
         String logo = " ____        _        \n"
                 + "|  _ \\ _   _| | _____ \n"
                 + "| | | | | | | |/ / _ \\\n"
                 + "| |_| | |_| |   <  __/\n"
                 + "|____/ \\__,_|_|\\_\\___|\n";
         System.out.println("Hello from\n" + logo);
+        greet();
+
+        String userResponde;
+        Scanner in = new Scanner(System.in);
+        do {
+            userResponde = in.nextLine();
+            dukeResponde(userResponde);
+
+        }while(!userResponde.equals("bye"));
+
     }
+
+    public static void greet(){
+        printLine();
+        System.out.println("\tHello! I'm Duke");
+        System.out.println("\tWhat can I do for you?");
+        printLine();
+        System.out.println();
+    }
+
+    public static void dukeResponde(String userResponde){
+        printLine();
+        if(userResponde.equals("bye")){
+            sayBye();
+        }
+        else if(userResponde.equals("list")) {
+            listTask();
+        }
+        else if(userResponde.startsWith("done")) {
+            markAsDone(userResponde);
+        }
+        else{
+            addNewTask(userResponde);
+        }
+        printLine();
+        System.out.println();
+    }
+
+    public static void printLine(){
+        System.out.println("\t____________________________________________________________");
+    }
+
+    public static void sayBye(){
+        System.out.println("\tBye. Hope to see you again soon!");
+    }
+
+    public static void listTask(){
+        System.out.println("\tHere are the tasks in your list:");
+        for(int i = 0; i < taskCount; i++) {
+            System.out.println("\t" + (i + 1) + "." + tasks[i]);
+        }
+    }
+
+    public static void markAsDone(String userResponde){
+        int doneCount = Integer.parseInt(userResponde.substring(5)) - 1;
+        tasks[doneCount].markAsDone();
+        System.out.println("\tNice! I've marked this task as done:");
+        System.out.println("\t  [\u2713] " + tasks[doneCount].getDescription());
+    }
+
+    public static void addNewTask(String userResponde){
+        if(userResponde.startsWith("todo")){
+            tasks[taskCount] = new Todo(userResponde.substring(5));
+        }
+        else if(userResponde.startsWith("deadline")){
+            int dividerPosition = userResponde.indexOf(" /by");
+            String taskName = userResponde.substring(9,dividerPosition);
+            String deadlineTime = userResponde.substring(dividerPosition + 5);
+            tasks[taskCount] = new Deadline(taskName,deadlineTime);
+        }
+        else if(userResponde.startsWith("event")){
+            int dividerPosition = userResponde.indexOf(" /at");
+            String taskName = userResponde.substring(6,dividerPosition);
+            String deadlineTime = userResponde.substring(dividerPosition + 5);
+            tasks[taskCount] = new Event(taskName,deadlineTime);
+        }
+        System.out.println("\tGot it. I've added this task:");
+        System.out.println("\t  " + tasks[taskCount]);
+        System.out.println("\tNow you have " + (taskCount+1) + " tasks in the list");
+        taskCount++;
+    }
+
 }
+

src/main/java/Event.java

@@ -0,0 +1,14 @@
+public class Event extends Task{
+
+    protected  String at;
+
+    public Event(String description,String at){
+        super(description);
+        this.at = at;
+    }
+
+    @Override
+    public String toString(){
+        return "[E]" + super.toString() + " (at: " + at + ")";
+    }
+}

src/main/java/Task.java

@@ -0,0 +1,29 @@
+public class Task {
+    protected String description;
+    protected boolean isDone;
+
+    public Task(){
+
+    }
+
+    public Task(String description) {
+        this.description = description;
+        this.isDone = false;
+    }
+
+    public String getStatusIcon() {
+        return (isDone ? "\u2713" : "\u2718"); //return tick or X symbols
+    }
+
+    public String getDescription(){
+        return description;
+    }
+
+    public void markAsDone(){
+        isDone = true;
+    }
+
+    public String toString(){
+        return "[" + getStatusIcon() + "] " + this.description;
+    }
+}

src/main/java/Todo.java

@@ -0,0 +1,11 @@
+public class Todo extends Task {
+
+    public Todo(String description){
+        super(description);
+    }
+
+    @Override
+    public String toString(){
+        return "[T]" + super.toString() ;
+    }
+}