[{Shi Zheng}] iP

src/main/java/Deadline.java

@@ -0,0 +1,14 @@
+public class Deadline extends Task {
+
+    public Deadline(String description) {
+        super(description);
+    }
+
+    public Deadline(String description, boolean b) {
+        super(description,b);
+    }
+
+    public String toString() {
+        return "[D]" + super.toString();
+    }
+}

src/main/java/Duke.java

@@ -1,10 +1,95 @@
+import java.util.Scanner;
+import java.util.ArrayList;
+
 public class Duke {
+
+    /**
+     * main method to run the program
+     *
+     * @param args command line arguments taken in
+     */
     public static void main(String[] args) {
-        String logo = " ____        _        \n"
-                + "|  _ \\ _   _| | _____ \n"
-                + "| | | | | | | |/ / _ \\\n"
-                + "| |_| | |_| |   <  __/\n"
-                + "|____/ \\__,_|_|\\_\\___|\n";
-        System.out.println("Hello from\n" + logo);
+        Scanner sc = new Scanner(System.in);
+        System.out.println("Hello! I'm Duke\n"+ "What can I do for you?");
+        ArrayList<Task> items = new ArrayList<>();
+
+        while (true) {
+            String input = sc.nextLine();
+            try {
+                errorHandling(input);
+                if (input.equals("bye")) {
+                    bye();
+                    break;
+                } else if (input.contains("done")) {
+                    System.out.println("Nice! I've marked this task as done: ");
+
+                    int taskNum = Integer.parseInt(input.substring(5));
+                    String name = items.get(taskNum - 1).getDescription();
+
+                    Task type = items.get(taskNum - 1);
+                    items.remove(taskNum - 1);
+                    if (type instanceof Todo) {
+                        Todo markDone = new Todo(name, true);
+                        items.add(taskNum - 1, markDone);
+                        System.out.println(markDone);
+                    } else if (type instanceof Deadline) {
+                        Deadline markDone = new Deadline(name, true);
+                        items.add(taskNum - 1, markDone);
+                        System.out.println(markDone);
+                    } else {
+                        Event markDone = new Event(name, true);
+                        items.add(taskNum - 1, markDone);
+                        System.out.println(markDone);
+                    }
+
+                } else if (input.equals("list")) {
+                    int n = 1;
+                    System.out.println("Here are the tasks in your list:");
+                    for (Task item : items) {
+                        System.out.println(n + ". " + item);
+                        n++;
+                    }
+
+                } else if (input.length() >= 8 && input.substring(0,8).equals("deadline")) {
+                    items.add(new Deadline(input.substring(8)));
+                } else if (input.length() >= 4 && input.substring(0,4).equals("todo")) {
+                    items.add(new Todo(input.substring(4)));
+                } else if (input.length() >= 5 && input.substring(0,5).equals("event")) {
+                    items.add(new Event(input.substring(5)));
+                } else if (input.length() >= 6 && input.substring(0,6).equals("delete")) {
+                    int taskToDelete = Integer.parseInt(input.substring(7));
+                    Task toRemove = items.get(taskToDelete - 1);
+                    items.remove(taskToDelete - 1);
+                    System.out.println("Noted. I've removed this task:\n  "
+                                       + toRemove + "\nNow you have " + items.size() + " tasks in the list.");
+
+                } else {
+                    items.add(new Task(input));
+                }
+            } catch (Exception e) {
+                System.out.println(e);
+            }
+        }
+    }
+
+    /**
+     * prints Goodbye message.
+     */
+    public static void bye() {
+        System.out.println("Bye. Hope to see you again soon!");
+    }
+
+    public static void errorHandling(String input) throws DukeException {
+        if (input.length() == 4 && input.equals("todo")) {
+            throw new DukeException(" ☹ OOPS!!! The description of a todo cannot be empty.");
+        } else if (input.length() == 8 && input.equals("deadline")) {
+            throw new DukeException(" ☹ OOPS!!! The description of a deadline cannot be empty.");
+        } else if (input.length() == 5 && input.equals("event")) {
+            throw new DukeException(" ☹ OOPS!!! The description of a event cannot be empty.");
+        } else if (input.length() >= 4 && input.substring(0,4).equals("blah")) {
+            throw new DukeException("☹ OOPS!!! I'm sorry, but I don't know what that means :-(");
+        } else if (input.isBlank()) {
+            throw new DukeException(" ☹ OOPS!!! A Task cannot be empty.");
+        } else {}
     }
 }

src/main/java/DukeException.java

@@ -0,0 +1,6 @@
+public class DukeException extends Exception {
+
+    public DukeException(String e) {
+        super(e);
+    }
+}

src/main/java/Event.java

@@ -0,0 +1,14 @@
+public class Event extends Task {
+        public Event(String description) {
+            super(description);
+        }
+
+        public Event(String description, boolean b) {
+            super(description,b);
+        }
+
+        public String toString() {
+            return "[E]" + super.toString();
+        }
+}
+

src/main/java/Task.java

@@ -0,0 +1,31 @@
+public class Task {
+    protected String description;
+    protected boolean isDone;
+
+    public Task(String description) {
+        this.description = description;
+        this.isDone = false;
+    }
+
+    public Task(String description, boolean b) {
+        this.description = description;
+        this.isDone = b;
+    }
+
+    public String getStatusIcon() {
+        return (isDone ? "X" : " "); // mark done task with X
+    }
+
+    public String getDescription() {
+        return this.description;
+    }
+
+    public Task changeStatus(Task t) {
+        return new Task(t.getDescription(), true);
+    }
+
+    public String toString() {
+        return "[" + getStatusIcon() + "]" + getDescription();
+
+    }
+}

src/main/java/Todo.java

@@ -0,0 +1,15 @@
+public class Todo extends Task {
+    public Todo(String description) {
+        super(description);
+    }
+
+    public Todo(String description, boolean b) {
+        super(description, b);
+    }
+
+    public String toString() {
+        return "[T]" + super.toString();
+    }
+}
+
+

text-ui-test/input.txt

@@ -0,0 +1,7 @@
+todo homework1
+event lecture 1 (10.00am tmr)
+deadline OP1cs2101 (16 Feb)
+
+done 1
+done 2
+done 3

text-ui-test/runtest.bat

@@ -7,7 +7,7 @@ REM delete output from previous run
 if exist ACTUAL.TXT del ACTUAL.TXT
 
 REM compile the code into the bin folder
-javac  -cp ..\src\main\java -Xlint:none -d ..\bin ..\src\main\java\*.java
+javac  -cp ..\src\main\java -Xlint:none -d ..\bin ..\src\main\java\Duke.java
 IF ERRORLEVEL 1 (
     echo ********** BUILD FAILURE **********
     exit /b 1