Level 5

Completed Level 5: Handle Errors
gachia · Aug 22, 2019 · ea8ba7c · ea8ba7c
1 parent ac597c4
commit ea8ba7c
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Showing 2 changed files with 74 additions and 49 deletions.
diff --git a/src/main/java/Duke.java b/src/main/java/Duke.java
@@ -2,6 +2,7 @@
 import java.util.ArrayList;
 
 public class Duke {
+
     public static void main(String[] args) {
         String logo = " ____        _        \n"
                 + "|  _ \\ _   _| | _____ \n"
@@ -16,57 +17,75 @@ public static void main(String[] args) {
         ArrayList<Task> list = new ArrayList();
         String taskName;
         Task task;
-        while(sc.hasNext()){
-            String userCmd = sc.next();
-            if(userCmd.equals("bye")){
-                System.out.println(lineSpace + "Bye. Hope to see you again soon!\n" + lineSpace);
-                break;
-            }
-            switch(userCmd) {
-                case "list":
-                    System.out.println(lineSpace + "Here are the tasks in your list:");
-                    for(int i=0; i < list.size(); i++){
-                        System.out.println(i+1 + "." + list.get(i));
-                    }
-                    System.out.print(lineSpace);
-                    break;
-                case "todo":
-                    taskName = sc.nextLine();
-                    taskName = taskName.trim();
-                    task = new Task(taskName);
-                    list.add(task);
-                    System.out.println(lineSpace + "Got it. I've added this task:\n" + task
-                            + "\nNow you have " + list.size() + " tasks in the list.\n" + lineSpace);
-                    break;
-                case "deadline":
-                    taskName = sc.nextLine();
-                    String[] userWords = taskName.trim().split("/by");
-                    task = new Deadline(userWords[0].trim(), userWords[1].trim());
-                    list.add(task);
-                    System.out.println(lineSpace + "Got it. I've added this task:\n" + task
-                            + "\nNow you have " + list.size() + " tasks in the list.\n" + lineSpace);
-                    break;
-                case "event":
-                    taskName = sc.nextLine();
-                    userWords = taskName.trim().split("/at");
-                    task = new Event(userWords[0].trim(), userWords[1].trim());
-                    list.add(task);
-                    System.out.println(lineSpace + "Got it. I've added this task:\n" + task
-                            + "\nNow you have " + list.size() + " tasks in the list.\n" + lineSpace);
+        while (sc.hasNext()) {
+            try {
+                String userCmd = sc.next();
+                String[] userWords;
+                if (userCmd.equals("bye")) {
+                    System.out.println(lineSpace + "Bye. Hope to see you again soon!\n" + lineSpace);
                     break;
-                case "done":
-                    int taskNo = sc.nextInt();
-                    list.get(taskNo-1).markAsDone();
-                    System.out.println(lineSpace + "Nice! I've marked this task as done:\n"
-                            + list.get(taskNo-1) + "\n" + lineSpace);
-                    break;
-                default:
-                    list.add(new Task(userCmd));
-                    System.out.println(lineSpace + "added: " + userCmd + "\n" + lineSpace);
-                //Level-1 code
-                //System.out.println(lineSpace + "\n" + userInput + "\n" + lineSpace);
+                }
+                switch (userCmd) {
+                    case "list":
+                        System.out.println(lineSpace + "Here are the tasks in your list:");
+                        for (int i = 0; i < list.size(); i++) {
+                            System.out.println(i + 1 + "." + list.get(i));
+                        }
+                        System.out.print(lineSpace);
+                        break;
+                    case "todo":
+                        taskName = sc.nextLine().trim();
+                        if (taskName.isEmpty()) {
+                            throw new DukeException("☹ OOPS!!! The description of a todo cannot be empty.");
+                        }
+                        task = new Task(taskName);
+                        list.add(task);
+                        System.out.println(lineSpace + "Got it. I've added this task:\n" + task
+                                + "\nNow you have " + list.size() + " tasks in the list.\n" + lineSpace);
+                        break;
+                    case "deadline":
+                        taskName = sc.nextLine().trim();
+                        if (taskName.isEmpty()) {
+                            throw new DukeException("☹ OOPS!!! The description of a deadline cannot be empty.");
+                        }
+                        userWords = taskName.split("/by");
+                        if (userWords.length == 1) {
+                            throw new DukeException("☹ OOPS!!! The date/time of a deadline cannot be empty or is wrongly typed.");
+                        }
+                        task = new Deadline(userWords[0].trim(), userWords[1].trim());
+                        list.add(task);
+                        System.out.println(lineSpace + "Got it. I've added this task:\n" + task
+                                + "\nNow you have " + list.size() + " tasks in the list.\n" + lineSpace);
+
+                        break;
+                    case "event":
+                        taskName = sc.nextLine().trim();
+                        if (taskName.isEmpty()) {
+                            throw new DukeException("☹ OOPS!!! The description of an event cannot be empty.");
+                        }
+                        userWords = taskName.split("/at");
+                        if (userWords.length == 1) {
+                            throw new DukeException("☹ OOPS!!! The date/time of an event cannot be empty or is wrongly typed.");
+                        }
+                        task = new Event(userWords[0].trim(), userWords[1].trim());
+                        list.add(task);
+                        System.out.println(lineSpace + "Got it. I've added this task:\n" + task
+                                + "\nNow you have " + list.size() + " tasks in the list.\n" + lineSpace);
+                        break;
+                    case "done":
+                        int taskNo = sc.nextInt();
+                        list.get(taskNo - 1).markAsDone();
+                        System.out.println(lineSpace + "Nice! I've marked this task as done:\n"
+                                + list.get(taskNo - 1) + "\n" + lineSpace);
+                        break;
+                    default:
+                        throw new DukeException("☹ OOPS!!! I'm sorry, but I don't know what that means :-(");
+                }
+            } catch (Exception e) {
+                System.out.println(e.getMessage());
             }
         }
-
     }
+
 }
+
diff --git a/src/main/java/DukeException.java b/src/main/java/DukeException.java
@@ -0,0 +1,6 @@
+public class DukeException extends Exception {
+
+    public DukeException(String error){
+        super(error);
+    }
+}