Level 5. Handle Errors

A-AbstractClasses
A-Packages

src/main/java/Duke.java → src/main/java/duke/Duke.java

@@ -1,10 +1,16 @@
+package duke;
+
+import duke.ui.UI;
+import duke.parser.Parser;
+import duke.task.TaskList;
+
 import java.util.Scanner;
 
 /**
  * A Personal Assistant Chatbot that helps a person to keep track of various things.
  *
  * @author Wang Zhenquan
- * @version Level 3
+ * @version Level 5
  * @since 20/08/2020
  */
 

src/main/java/DukeException.java → src/main/java/duke/exception/DukeException.java

@@ -1,3 +1,4 @@
+package duke.exception;
 /**
  * Inherits the Exception class. <p>
  * Overrides the constructor that takes a String parameter with custom error information
@@ -7,7 +8,7 @@
  * Catch that exception somewhere else and print the message inside the exception object.
  */
 public class DukeException extends Exception {
-    DukeException(String input) {
+    public DukeException(String input) {
         super(input);
     }
 }

src/main/java/Parser.java → src/main/java/duke/parser/Parser.java

@@ -1,4 +1,9 @@
-class Parser {
+package duke.parser;
+
+import duke.task.TaskList;
+import duke.ui.UI;
+
+public class Parser {
     /**
      * @param line The entire user input.
      */
@@ -7,11 +12,11 @@ String getCommandWord(String line) {
     }
 
     /**
-     * @param line     The entire user input.
-     * @param ui       The UI created in the Duke class.
-     * @param tasks    The TaskList created in the Duke class.
+     * @param line  The entire user input.
+     * @param ui    The UI created in the Duke class.
+     * @param tasks The TaskList created in the Duke class.
      */
-    boolean parseInput(String line, UI ui, TaskList tasks) {
+    public boolean parseInput(String line, UI ui, TaskList tasks) {
 
         String command = getCommandWord(line);
         switch (command) {

src/main/java/Deadline.java → src/main/java/duke/task/Deadline.java

@@ -1,4 +1,6 @@
-class Deadline extends Todo{
+package duke.task;
+
+class Deadline extends Todo {
     private String[] split;
 
     Deadline(String input) {

src/main/java/Event.java → src/main/java/duke/task/Event.java

@@ -1,4 +1,6 @@
-class Event extends Todo{
+package duke.task;
+
+class Event extends Todo {
     private String[] split;
 
     Event(String input) {

src/main/java/Task.java → src/main/java/duke/task/Task.java

@@ -1,7 +1,10 @@
+package duke.task;
+
 /**
- * A class for tasks.
+ * An abstract class that is inherited by the Todo, Deadline and Event classes.
  */
-class Task {
+
+public abstract class Task {
     String task;
     private boolean isDone;
 
@@ -20,7 +23,8 @@ boolean getDone() {
     String getTaskStatus(Boolean isDone) {
         return "[" + (isDone ? "\u2713" : "\u2718") + "] "; //return tick or X symbols
     }
-    String getDescription() {
+
+    public String getDescription() {
         return getTaskStatus(isDone) + task;
     }
 }

src/main/java/TaskList.java → src/main/java/duke/task/TaskList.java

@@ -1,32 +1,37 @@
+package duke.task;
+
+import duke.exception.DukeException;
+import duke.ui.UI;
+
 import java.util.ArrayList;
 
 /**
  * Responsible for managing all the tasks in the list. This class will use an ArrayList inside it.
  */
-class TaskList {
+public class TaskList {
     private ArrayList<Task> tasks;
 
     TaskList(ArrayList<Task> tasks) {
         this.tasks = tasks;
     }
 
-    TaskList() {
+    public TaskList() {
         tasks = new ArrayList<>();
     }
 
-    int size() {
+    public int size() {
         return tasks.size();
     }
 
     void add(Task task) {
         tasks.add(task);
     }
 
-    Task get(int index) {
+    public Task get(int index) {
         return tasks.get(index);
     }
 
-    void changeDone(String line, UI ui, TaskList tasks) {
+    public void changeDone(String line, UI ui, TaskList tasks) {
         line = line.substring("done".length()).trim();
         try {
             if (!line.isEmpty()) {
@@ -55,7 +60,7 @@ private void markAsDone(String line, UI ui, TaskList tasks) {
         }
     }
 
-    void createTodo(String line, UI ui, TaskList tasks) {
+    public void createTodo(String line, UI ui, TaskList tasks) {
         try {
             if (line.substring("todo".length()).trim().isEmpty()) {
                 throw new DukeException
@@ -70,7 +75,7 @@ void createTodo(String line, UI ui, TaskList tasks) {
         }
     }
 
-    void createDeadline(String line, UI ui, TaskList tasks) {
+    public void createDeadline(String line, UI ui, TaskList tasks) {
         try {
             if (line.substring("deadline".length()).trim().isEmpty() || !line.contains("/by")) {
                 throw new DukeException
@@ -97,7 +102,7 @@ void createDeadline(String line, UI ui, TaskList tasks) {
         }
     }
 
-    void createEvent(String line, UI ui, TaskList tasks) {
+    public void createEvent(String line, UI ui, TaskList tasks) {
         try {
             if (line.substring("event".length()).trim().isEmpty() || !line.contains("/at")) {
                 throw new DukeException

src/main/java/duke/task/Todo.java

@@ -0,0 +1,9 @@
+package duke.task;
+
+class Todo extends Task {
+
+    Todo(String input) {
+        super(input);
+    }
+
+}

src/main/java/UI.java → src/main/java/duke/ui/UI.java

@@ -1,20 +1,24 @@
-class UI {
+package duke.ui;
 
-    void greet() {
+import duke.task.TaskList;
+
+public class UI {
+
+    public void greet() {
         String greeting = "____________________________________________________________\n"
                 + "Hello! I'm Duke\n"
                 + "What can I do for you?\n"
                 + "____________________________________________________________\n";
         System.out.println(greeting);
     }
 
-    void farewell() {
+    public void farewell() {
         String farewell = "Bye. Hope to see you again soon!\n"
                 + "____________________________________________________________\n";
         System.out.println(farewell);
     }
 
-    void markedAsDone(int index, TaskList tasks) {
+    public void markedAsDone(int index, TaskList tasks) {
         String done = "____________________________________________________________\n"
                 + "\033[33mTask [" + index + "] "
                 + tasks.get(index - 1).getDescription() + " has been set as completed.\033[0m"
@@ -29,15 +33,15 @@ void showTotal(TaskList tasks) {
         System.out.println(total);
     }
 
-    void printError(String s) {
+    public void printError(String s) {
         System.out.println(colorRed(s));
     }
 
-    String colorRed(String input) {
+    public String colorRed(String input) {
         return "\033[31m" + input + "\033[0m";
     }
 
-    void invalidCommand() {
+    public void invalidCommand() {
         printError("Please enter a valid command.");
     }
 

text-ui-test/EXPECTED.TXT

@@ -5,3 +5,7 @@ Hello from
 | |_| | |_| |   <  __/
 |____/ \__,_|_|\_\___|
 
+____________________________________________________________
+Hello! I'm Duke
+What can I do for you?
+____________________________________________________________

text-ui-test/runtest.bat

@@ -4,10 +4,10 @@ REM create bin directory if it doesn't exist
 if not exist ..\bin mkdir ..\bin
 
 REM delete output from previous run
-del ACTUAL.TXT
+//del ACTUAL.TXT
 
 REM compile the code into the bin folder
-javac  -cp ..\src -Xlint:none -d ..\bin ..\src\main\java\Duke.java
+javac  -cp ..\src -Xlint:none -d ..\bin ..\src\main\java\duke\Duke.java
 IF ERRORLEVEL 1 (
     echo ********** BUILD FAILURE **********
     exit /b 1