Merge pull request #119 from Brian030601/master

Add Exceptions

Author: Brian030601

data/events/event.txt

@@ -1,3 +1,2 @@
 hello | 2023-12-20T12:30:30 | 2023-12-20T12:30:30 
-2023-12-20T12:30:30 | 2023-12-20T12:30:30 | 2023-12-20T12:30:30 
 EC3333 | 2023-12-20T12:30:30 | 2023-12-20T12:30:40 

src/main/java/seedu/duke/calendar/Calendar.java

@@ -3,5 +3,9 @@
 package seedu.duke.calendar;
 
 public class Calendar {
+    /**
+     * Here for integrating Flashcard goals with Calendar
+     */
+
     EventList eventList;
 }

src/main/java/seedu/duke/calendar/CalendarCommandParser.java

@@ -10,20 +10,65 @@
 import seedu.duke.calendar.command.FindEventCommand;
 import seedu.duke.calendar.command.ListCalendarEventsCommand;
 
+import seedu.duke.calendar.Exceptions.AddEventException;
+import seedu.duke.calendar.Exceptions.DeleteEventException;
+import seedu.duke.calendar.Exceptions.DeleteAllException;
+import seedu.duke.calendar.Exceptions.FindEventException;
+import seedu.duke.calendar.Exceptions.ListEventException;
+
+import java.util.Scanner;
+
 public class CalendarCommandParser {
+    public static void manageException(String userInput) throws AddEventException, DeleteEventException,
+            DeleteAllException, FindEventException, ListEventException {
+
+        Scanner input = new Scanner(userInput);
+        String command = input.next();
+
+        if (command.equals("add") && !input.hasNext()) {
+            throw new AddEventException();
+        }
+        if (command.equals("delete all") && !input.hasNext()) {
+            throw new DeleteAllException();
+        }
+        if (command.equals("delete") && !input.hasNext()) {
+            throw new DeleteEventException();
+        }
+        if (command.equals("find") && !input.hasNext()) {
+            throw new FindEventException();
+        }
+        if (command.equals("list") && !input.hasNext()) {
+            throw new ListEventException();
+        }
+    }
+
     public EventCommand parseInput(String input) {
         assert input != null : "input is null";
 
-        if (input.startsWith("add event")) {
-            return new AddEventCommand();
-        } else if (input.startsWith("delete event")) {
-            return new DeleteEventCommand();
-        } else if (input.startsWith("list events")) {
-            return new ListCalendarEventsCommand();
-        } else if (input.startsWith("delete all events")) {
-            return new DeleteAllEventsCommand();
-        } else if (input.startsWith("find event")) {
-            return new FindEventCommand();
+        try {
+            manageException(input);
+            if (input.startsWith("add event")) {
+                return new AddEventCommand();
+            } else if (input.startsWith("delete event")) {
+                return new DeleteEventCommand();
+            } else if (input.startsWith("list events")) {
+                return new ListCalendarEventsCommand();
+            } else if (input.startsWith("delete all events")) {
+                return new DeleteAllEventsCommand();
+            } else if (input.startsWith("find event")) {
+                return new FindEventCommand();
+            }
+
+        } catch (AddEventException exception) {
+            System.out.println("☹ OOPS!!! The description of an add cannot be empty.");
+        } catch (DeleteAllException exception) {
+            System.out.println("☹ OOPS!!! The description of a delete all cannot be empty.");
+        } catch (DeleteEventException exception) {
+            System.out.println("☹ OOPS!!! The description of a delete cannot be empty.");
+        } catch (FindEventException exception) {
+            System.out.println("☹ OOPS!!! The description of an find cannot be empty.");
+        } catch (ListEventException exception) {
+            System.out.println("☹ OOPS!!! The description of a list cannot.");
         }
 
         return new UnknownCommand();

src/main/java/seedu/duke/calendar/Exceptions/AddEventException.java

@@ -0,0 +1,5 @@
+package seedu.duke.calendar.Exceptions;
+
+public class AddEventException extends Exception {
+
+}

src/main/java/seedu/duke/calendar/Exceptions/DeleteAllException.java

@@ -0,0 +1,5 @@
+package seedu.duke.calendar.Exceptions;
+
+public class DeleteAllException extends Exception {
+
+}

src/main/java/seedu/duke/calendar/Exceptions/DeleteEventException.java

@@ -0,0 +1,5 @@
+package seedu.duke.calendar.Exceptions;
+
+public class DeleteEventException extends Exception {
+
+}

src/main/java/seedu/duke/calendar/Exceptions/EventTimeErrorException.java

@@ -0,0 +1,5 @@
+package seedu.duke.calendar.Exceptions;
+
+public class EventTimeErrorException extends Exception {
+
+}

src/main/java/seedu/duke/calendar/Exceptions/FindEventException.java

@@ -0,0 +1,5 @@
+package seedu.duke.calendar.Exceptions;
+
+public class FindEventException extends Exception {
+
+}

src/main/java/seedu/duke/calendar/Exceptions/ListEventException.java

@@ -0,0 +1,5 @@
+package seedu.duke.calendar.Exceptions;
+
+public class ListEventException extends Exception {
+
+}

src/main/java/seedu/duke/calendar/command/AddEventCommand.java

@@ -1,29 +1,44 @@
-//@@ kherlenbayasgalan & Cheezeblokz
+//@@ kherlenbayasgalan
 
 package seedu.duke.calendar.command;
 
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
 import seedu.duke.calendar.Event;
 import seedu.duke.calendar.EventList;
 
+import java.time.format.DateTimeParseException;
+
 import java.util.Scanner;
-import java.time.LocalDateTime;
 
 public class AddEventCommand extends EventCommand {
+
     public void execute(Scanner scanner, EventList eventList) {
         System.out.print("What's the event?: ");
         String eventName = scanner.nextLine();
-        System.out.print("When does it start? (yyyy-mm-ddThh:mm:ss) (eg. 2023-12-20T12:30:30): ");
-        LocalDateTime startTime = LocalDateTime.parse(scanner.nextLine());
-        System.out.print("When does it end? (yyyy-mm-ddThh:mm:ss) (eg. 2023-12-20T12:30:30): ");
-        LocalDateTime endTime = LocalDateTime.parse(scanner.nextLine());
+
+        LocalDateTime startTime = parseDateTimeInput(scanner, "When does it start? (yyyy-MM-ddTHH:mm:ss) (e.g., 2023-12-20T12:30:30): ");
+        LocalDateTime endTime = parseDateTimeInput(scanner, "When does it end? (yyyy-MM-ddTHH:mm:ss) (e.g., 2023-12-20T12:30:30): ");
 
         if (endTime.isAfter(startTime)) {
             Event event = new Event(eventName, startTime, endTime);
             eventList.addEvent(event);
             System.out.println(event + " has been added to your Calendar");
         } else {
-            System.out.println("    End time is wrong. Enter the correct end time");
+            System.out.println("    End time is before or equal to the start time. Please enter the correct end time.");
         }
+    }
 
+    private LocalDateTime parseDateTimeInput(Scanner scanner, String prompt) {
+        while (true) {
+            System.out.print(prompt);
+            String userInput = scanner.nextLine();
+            try {
+                return LocalDateTime.parse(userInput, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss"));
+            } catch (DateTimeParseException e) {
+                System.out.println("    Invalid date and time format. Please try again.");
+            }
+        }
     }
 }