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Reimplement taskList using ArrayList class
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Kishen271828 committed Feb 23, 2024
1 parent ab4f5ee commit 794806b
Showing 1 changed file with 39 additions and 37 deletions.
76 changes: 39 additions & 37 deletions src/main/java/Nehsik.java
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Original file line number Diff line number Diff line change
@@ -1,35 +1,35 @@
import java.util.ArrayList;
import java.util.Scanner;
public class Nehsik {
public static final int MAX_TASKS = 100;
public static final int MARK_TASK_INDEX = 5;
public static final int UNMARK_TASK_INDEX = 7;
public static final int TODO_DESCRIPTION_POSITION = 5;


public static void main(String[] args) {
displayGreetings();

Scanner in = new Scanner(System.in);
Task[] taskList = new Task[MAX_TASKS];
int currTaskCount = 0;
ArrayList<Task> taskList = new ArrayList<>();

while (true) {
try {
String command = in.nextLine().trim();
if (command.equals("list")) {
displayTaskList(currTaskCount, taskList);
displayTaskList(taskList);
} else if (command.startsWith("mark")) {
markTask(command, taskList, currTaskCount);
markTask(command, taskList);
} else if (command.startsWith("unmark")) {
unmarkTask(command, taskList, currTaskCount);
unmarkTask(command, taskList);
} else if (command.startsWith("todo")) {
addTodoTask(command, taskList, currTaskCount);
currTaskCount = acknowledgeTaskAdded(taskList, currTaskCount);
addTodoTask(command, taskList);
acknowledgeTaskAdded(taskList);
} else if (command.startsWith("deadline")) {
addDeadlineTask(command, taskList, currTaskCount);
currTaskCount = acknowledgeTaskAdded(taskList, currTaskCount);
addDeadlineTask(command, taskList);
acknowledgeTaskAdded(taskList);
} else if (command.startsWith("event")) {
addEventTask(command, taskList, currTaskCount);
currTaskCount = acknowledgeTaskAdded(taskList, currTaskCount);
addEventTask(command, taskList);
acknowledgeTaskAdded(taskList);
} else if (command.equals("bye")) {
displayExitMessage();
break;
Expand All @@ -46,46 +46,49 @@ public static void main(String[] args) {
in.close();
}

private static void displayTaskList(int currTaskCount, Task[] taskList) {
private static void displayTaskList(ArrayList<Task> taskList) {
printLine();
System.out.println("Here are the tasks in your list:");
for (int i = 0; i < currTaskCount; i++) {
System.out.println((i + 1) + "." + taskList[i].toString());
int taskListSize = taskList.size();
for (int i = 0; i < taskListSize; i++) {
System.out.println((i + 1) + "." + taskList.get(i).toString());
}
printLine();
}

private static void markTask(String command, Task[] taskList, int currTaskCount) throws NehsikException {
private static void markTask(String command, ArrayList<Task> taskList) throws NehsikException {
if (command.length() < MARK_TASK_INDEX) {
throw new NehsikException("Please mention the task number you would like to mark");
}
int taskNum = Integer.parseInt(command.substring(MARK_TASK_INDEX)) - 1;
if (taskNum >= currTaskCount || taskNum < 0) {
throw new NehsikException("Please enter a valid task number. There are " + currTaskCount + " tasks in the list");
int taskListSize = taskList.size();
if (taskNum >= taskListSize || taskNum < 0) {
throw new NehsikException("Please enter a valid task number. There are " + taskListSize + " tasks in the list");
}
printLine();
System.out.println("Nice! I've marked this task as done:");
taskList[taskNum].markAsDone();
System.out.println(taskList[taskNum].toString());
taskList.get(taskNum).markAsDone();
System.out.println(taskList.get(taskNum).toString());
printLine();
}

private static void unmarkTask(String command, Task[] taskList, int currTaskCount) throws NehsikException {
private static void unmarkTask(String command, ArrayList<Task> taskList) throws NehsikException {
if (command.length() < UNMARK_TASK_INDEX) {
throw new NehsikException("Please mention the task number you would like to unmark");
}
int taskNum = Integer.parseInt(command.substring(UNMARK_TASK_INDEX)) - 1;
if (taskNum >= currTaskCount || taskNum < 0) {
throw new NehsikException("Please enter a valid task number. There are " + currTaskCount + " tasks in the list");
int taskListSize = taskList.size();
if (taskNum >= taskListSize || taskNum < 0) {
throw new NehsikException("Please enter a valid task number. There are " + taskListSize + " tasks in the list");
}
printLine();
System.out.println("OK, I've marked this task as not done yet:");
taskList[taskNum].markAsUndone();
System.out.println(taskList[taskNum].toString());
taskList.get(taskNum).markAsUndone();
System.out.println(taskList.get(taskNum).toString());
printLine();
}

private static void addTodoTask(String command, Task[] taskList, int currTaskCount) throws NehsikException {
private static void addTodoTask(String command, ArrayList<Task> taskList) throws NehsikException {
if (command.length() < TODO_DESCRIPTION_POSITION) {
throw new NehsikException("The description of a todo cannot be empty");
}
Expand All @@ -95,10 +98,10 @@ private static void addTodoTask(String command, Task[] taskList, int currTaskCou
}

String taskDescription = command.substring(TODO_DESCRIPTION_POSITION).trim();
taskList[currTaskCount] = new Todo(taskDescription);
taskList.add(new Todo(taskDescription));
}

private static void addDeadlineTask(String command, Task[] taskList, int currTaskCount) throws NehsikException {
private static void addDeadlineTask(String command, ArrayList<Task> taskList) throws NehsikException {
int descriptionStartPosition = command.indexOf("deadline ") + 9;
if (command.length() <= descriptionStartPosition) {
throw new NehsikException("The description of a deadline cannot be empty");
Expand All @@ -114,10 +117,10 @@ private static void addDeadlineTask(String command, Task[] taskList, int currTas
int byStringPosition = command.indexOf("/by ") + 4;
String by = command.substring(byStringPosition).trim();

taskList[currTaskCount] = new Deadline(taskDescription, by);
taskList.add(new Deadline(taskDescription, by));
}

private static void addEventTask(String command, Task[] taskList, int currTaskCount) throws NehsikException {
private static void addEventTask(String command, ArrayList<Task> taskList) throws NehsikException {
int descriptionStartPosition = command.indexOf("event ") + 6;
if (command.length() <= descriptionStartPosition) {
throw new NehsikException("The description of an event cannot be empty");
Expand All @@ -136,17 +139,16 @@ private static void addEventTask(String command, Task[] taskList, int currTaskCo
int toStringPosition = command.indexOf("/to ") + 4;
String to = command.substring(toStringPosition).trim();

taskList[currTaskCount] = new Event(taskDescription, from, to);
taskList.add(new Event(taskDescription, from, to));
}

private static int acknowledgeTaskAdded(Task[] taskList, int currTaskCount) {
private static void acknowledgeTaskAdded(ArrayList<Task> taskList) {
int latestTaskIndex = taskList.size() - 1;
printLine();
System.out.println("Got it. I've added this task:");
System.out.println(" " + taskList[currTaskCount].toString());
System.out.println("Now you have " + (currTaskCount + 1) + " tasks in the list");
currTaskCount++;
System.out.println(" " + taskList.get(latestTaskIndex).toString());
System.out.println("Now you have " + (latestTaskIndex + 1) + " tasks in the list");
printLine();
return currTaskCount;
}

private static void printLine() {
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