[Caleb Chan] iP

src/main/java/Nano.java

@@ -0,0 +1,178 @@
+import java.util.Scanner;
+
+public class Nano {
+
+    private final static int HORIZONTAL_LINE_LENGTH = 100;
+    private final static int MAX_TASK_COUNT = 100;
+    private final static String NANO_LOGO = "| \\  ||   / \\   | \\  |||  __  |\n"
+            + "||\\\\ ||  / _ \\  ||\\\\ ||| |  | |\n"
+            + "|| \\\\|| //   \\\\ || \\\\||| |__| |\n"
+            + "||  \\_|//     \\\\||  \\_||______|\n";
+    private final static int COMMAND_INDEX = 0;
+    private final static int TASK_NAME_INDEX = 1;
+    public static final String TASK_COMPLETED_MARK = "[x] ";
+    public static final String TASK_UNCOMPLETED_MARK = "[] ";
+    public static final String MESSAGE_TASK_NOT_FOUND = "Task not found.";
+    public static final String MESSAGE_TASK_MARKED = "Great job completing ";
+    public static final String MESSAGE_TASK_ALREADY_DONE = " is already done";
+    public static final String MESSAGE_TASK_UNMARKED = " is marked as undone";
+    private static Task[] tasks;
+    public static void main(String[] args) {
+        //chatbot startup
+        displayWelcomeMessage();
+        initialiseTaskList();
+
+        //receive commands
+        while (true) {
+            String userInput = getUserInput();
+            executeCommand(userInput);
+        }
+    }
+
+    private static void executeCommand(String userInput) {
+        String[] userInputs = processInput(userInput);
+
+        switch (userInputs[COMMAND_INDEX]) {
+        case "list":
+            displayTaskList();
+            break;
+        case "add":
+            addTask(userInputs[TASK_NAME_INDEX]);
+            break;
+        case "mark":
+            markTask(userInputs[TASK_NAME_INDEX]);
+            break;
+        case "unmark":
+            unmarkTask(userInputs[TASK_NAME_INDEX]);
+            break;
+        case "exit":
+            displayExitMessage();
+            System.exit(0);
+        default:
+            displayHelpMessage();
+            break;
+        }
+    }
+
+    private static void unmarkTask(String taskName) {
+        int taskIndex = getTaskIndex(taskName);
+        if (taskIndex == -1) {
+            System.out.println(MESSAGE_TASK_NOT_FOUND);
+        } else {
+            if (tasks[taskIndex].getTaskCompletionStatus()) {
+                tasks[taskIndex].incompleteTask();
+                System.out.println(taskName + MESSAGE_TASK_UNMARKED);
+            } else {
+                System.out.println(taskName + MESSAGE_TASK_ALREADY_DONE);
+            }
+        }
+    }
+    private static void markTask(String taskName) {
+        int taskIndex = getTaskIndex(taskName);
+        if (taskIndex == -1) {
+            System.out.println(MESSAGE_TASK_NOT_FOUND);
+        } else {
+            if (!tasks[taskIndex].getTaskCompletionStatus()) {
+                tasks[taskIndex].completeTask();
+                System.out.println(MESSAGE_TASK_MARKED + taskName);
+            } else {
+                System.out.println(taskName + MESSAGE_TASK_ALREADY_DONE);
+            }
+        }
+    }
+    private static int getTaskIndex(String taskName) {
+        for (int i = 1; i <= Task.getTaskCount(); i += 1) {
+            if (tasks[i].getTaskName().equals(taskName)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    private static void addTask(String taskName) {
+        if (isInList(taskName)) {
+            System.out.println(taskName + " is already in the list!");
+        } else {
+            Task newTask = new Task(taskName);
+            tasks[Task.getTaskCount()] = newTask;
+            System.out.println("Added " + taskName);
+        }
+    }
+
+    private static boolean isInList(String taskName) {
+        for (int i = 1; i <= Task.getTaskCount(); i += 1) {
+            if (tasks[i].getTaskName().equals(taskName)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static void displayHelpMessage() {
+        //TODO to be improved
+        System.out.println("Invalid input!");
+    }
+
+    private static String[] processInput(String userInput) {
+        userInput = userInput.replace("/", "").trim();
+        String[] userInputs = new String[2];
+        userInputs = userInput.split("\\s+", 2);
+        return userInputs;
+    }
+
+    private static void displayTaskList() {
+        System.out.println("You have completed " + Task.getCompletedTaskCount() + " tasks. " + Task.getUncompletedTaskCount() + " more to go!");
+        for (int i = 1; i <= Task.getTaskCount(); i += 1) {
+            System.out.print(i + ".");
+            printTodoMark(i);
+            System.out.println(tasks[i].getTaskName());
+        }
+    }
+
+    private static void printTodoMark(int i) {
+        if (tasks[i].getTaskCompletionStatus()) {
+            System.out.print(TASK_COMPLETED_MARK);
+        } else {
+            System.out.print(TASK_UNCOMPLETED_MARK);
+        }
+    }
+
+    private static boolean isValidCommand(String command) {
+        return command.startsWith("/");
+    }
+
+    private static void displayExitMessage() {
+        System.out.println("Sleep mode activated.");
+    }
+
+    //creates a list of task (1-index)
+    private static void initialiseTaskList() {
+        tasks = new Task[MAX_TASK_COUNT + 1];
+    }
+
+    private static String getUserInput() {
+        String userInput;
+        Scanner in = new Scanner(System.in);
+        userInput = in.nextLine();
+        return userInput;
+    }
+
+    private static void displayWelcomeMessage() {
+        printHorizontalLine();
+        System.out.println(NANO_LOGO);
+        System.out.println("Serial number: 034-4532-5893.....");
+        System.out.println("Activating the 7th generation Nano Machine of the Chan Corporation.....");
+        printHorizontalLine();
+        System.out.println("How may I assist you?");
+        printHorizontalLine();
+    }
+
+    //print horizontal line
+    public static void printHorizontalLine() {
+        for (int i = 0; i < HORIZONTAL_LINE_LENGTH / 10; i += 1) {
+            System.out.print("__________");
+        }
+        System.out.println();
+    }
+}
+
+

src/main/java/Task.java

@@ -0,0 +1,42 @@
+public class Task {
+    private String name;
+    private boolean isCompleted;
+    private static int taskCount = 0;
+    private static int completedTaskCount = 0;
+
+    public Task(String name) {
+        this.name = name;
+        this.isCompleted = false;
+        taskCount += 1;
+    }
+
+    public void completeTask() {
+        this.isCompleted = true;
+        completedTaskCount += 1;
+    }
+
+    public void incompleteTask() {
+        this.isCompleted = false;
+        completedTaskCount -= 1;
+    }
+
+    public String getTaskName() {
+        return this.name;
+    }
+
+    public boolean getTaskCompletionStatus() {
+        return this.isCompleted;
+    }
+
+    public static int getTaskCount() {
+        return taskCount;
+    }
+
+    public static int getCompletedTaskCount() {
+        return completedTaskCount;
+    }
+
+    public static int getUncompletedTaskCount() {
+        return taskCount - completedTaskCount;
+    }
+}