[Tan Zheng Fu Justin] iP

src/main/java/Duke.java

@@ -1,10 +1,96 @@
+/**
+ *  CS2113T Semester 2 AY19/20
+ *  Individual Project
+ *
+ *  Project Duke is a educational software project designed to take you through
+ *      the steps of building a small software incrementally,
+ *      while applying as many Java and SE techniques as possible along the way.
+ *
+ *  The project aims to build a product named Duke, a Personal Assistant Chatbot that
+ *      helps a person to keep track of various things. The name Duke was chosen as a placeholder name,
+ *      in honor of Duke, the Java Mascot. You may give it any other name and personality you wish.
+ *
+ *  @file/s: Duke.java Printer.java Storage.java Task.java
+ *  @author: Tan Zheng Fu Justin
+ */
+
+import java.util.Scanner;
+
 public class Duke {
-    public static void main(String[] args) {
+    static Storage myTasks = new Storage();
+
+    public static void start() {
         String logo = " ____        _        \n"
                 + "|  _ \\ _   _| | _____ \n"
                 + "| | | | | | | |/ / _ \\\n"
                 + "| |_| | |_| |   <  __/\n"
                 + "|____/ \\__,_|_|\\_\\___|\n";
-        System.out.println("Hello from\n" + logo);
+        Printer.printStart(logo);
+    }
+
+    public static void exits() {
+        Printer.printLines();
+        Printer.printIndentation();
+        Printer.printBye();
+        Printer.printLines();
+    }
+
+    public static Task readFromUser() {
+        Scanner in = new Scanner(System.in);
+        String userInput;
+
+        userInput = in.nextLine();
+        Task task = new Task(userInput);
+
+        return task;
+    }
+
+    public static String[] parseCommand(String description) {
+        String[] commands = description.split(" ");
+        return commands;
+    }
+
+    public static void echoUntilBye() {
+        boolean isBye = false;
+        while (!isBye) {
+            Task task = readFromUser();
+            String[] commands = parseCommand(task.description);
+            String command = commands[0];
+            switch (command) {
+            case "bye":
+                isBye = true;
+                exits();
+                continue;
+            case "list":
+                myTasks.displayTasks();
+                continue;
+            case "done":
+                try {
+                    int index = Integer.parseInt(commands[1]);
+                    Task t = myTasks.getTask(index);
+                    if (Task.isValid(t)) {
+                        t.markAsDone();
+                        Printer.printConfirmationMessage(t);
+                    } else {
+                        Printer.printError();
+                    }
+                } catch (ArrayIndexOutOfBoundsException e) {
+                    Printer.printError();
+                }
+                continue;
+
+            default:
+                myTasks.storeTasks(task);
+                Printer.printConfirmationMessage(task.description);
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+        start();
+        Printer.printLines();
+        Printer.printGreetings();
+        Printer.printLines();
+        echoUntilBye();
     }
 }

src/main/java/Printer.java

@@ -0,0 +1,66 @@
+import java.util.List;
+
+public class Printer {
+    public static void printIndentation() {
+        System.out.print("    ");
+    }
+
+    public static void printStart(String logo) {
+        System.out.println("Hello from\n" + logo);
+    }
+
+    public static void printGreetings() {
+        printIndentation();
+        System.out.println("Hello! I'm Duke");
+        printIndentation();
+        System.out.println("What can I do for you?");
+    }
+
+    public static void printLines() {
+        printIndentation();
+        System.out.println("---------------------------------------");
+    }
+
+    public static void printBye() {
+        System.out.println("Bye. Hope to see you again soon!");
+    }
+
+    public static void printConfirmationMessage(String text) {
+        printLines();
+        printIndentation();
+        System.out.println("Added: " + text);
+        printLines();
+    }
+
+    public static void printConfirmationMessage(Task task) {
+        printLines();
+        printIndentation();
+        System.out.printf("Nice! I've marked this task as done:\n");
+        printIndentation();
+        System.out.printf("  [%s] %s\n", task.getStatusIcon(), task.getDescription());
+        printLines();
+    }
+
+    public static void printTasks(List<Task> myList) {
+        printLines();
+        if (myList.isEmpty()) {
+            printIndentation();
+            System.out.println("List is empty.");
+        } else {
+            for (int i = 0; i < myList.size(); i++) {
+                printIndentation();
+                Task temp = myList.get(i);
+                String symbol = temp.getStatusIcon();
+                System.out.printf("%d.[%s] %s\n", i + 1, symbol, temp.getDescription());
+            }
+        }
+        printLines();
+    }
+
+    public static void printError() {
+        printLines();
+        printIndentation();
+        System.out.println("Error.. ;-;");
+        printLines();
+    }
+}

src/main/java/Storage.java

@@ -0,0 +1,23 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class Storage {
+    private List<Task> myTasks = new ArrayList<>();
+
+    public void storeTasks(Task task) {
+        myTasks.add(task);
+    }
+
+    public void displayTasks() {
+        Printer.printTasks(myTasks);
+    }
+
+    public Task getTask(int index) {
+        try {
+            return myTasks.get(index - 1);
+        }
+        catch(Exception e) {
+            return null;
+        }
+    }
+}

src/main/java/Task.java

@@ -0,0 +1,25 @@
+public class Task {
+    protected String description;
+    protected boolean isDone;
+
+    public Task(String description) {
+        this.description = description;
+        this.isDone = false;
+    }
+
+    public String getDescription() {
+        String description = this.description;
+        return description;
+    }
+
+    public String getStatusIcon() {
+        return (isDone ? "\u2713" : "\u2718");
+    }
+
+    public void markAsDone() {
+        this.isDone = true;
+    }
+    public static boolean isValid(Task task) {
+        return task != null;
+    }
+}