Implement v1.4, fix bugs and refine UG

src/main/java/seedu/address/itinerary/logic/commands/AddEventCommand.java

@@ -15,8 +15,9 @@ public class AddEventCommand extends Command<Model> {
 
     public static final String COMMAND_WORD = "add";
     public static final String MESSAGE_USAGE = COMMAND_WORD + ": Adds an event to the itinerary, "
-            + "based on the following format:\nadd title/[title] date/ [date] time/[time] l/[location] d/[desc]\n"
-            + "NOTE: Title, date and time are compulsory the rest can be left as empty fields.";
+            + "based on the following format:\nadd title/TITLE date/DATE time/TIME [l/LOCATION] [d/DESC]\n"
+            + "NOTE: Title, date and time are compulsory location and description can be left as empty fields. \n"
+            + "Please remember to also change the priority of your event using the dropdown box";
 
     public static final String MESSAGE_DUPLICATE_EVENT = "There is another event which is happening at the same "
             + "date and time.\n"

src/main/java/seedu/address/itinerary/logic/parser/ParserUtil.java

@@ -11,9 +11,13 @@
 import seedu.address.itinerary.model.event.Tag;
 import seedu.address.itinerary.model.event.Time;
 import seedu.address.itinerary.model.event.Title;
+import seedu.address.logic.parser.ArgumentMultimap;
+import seedu.address.logic.parser.Prefix;
 import seedu.address.logic.parser.exceptions.ParseException;
 import seedu.address.ui.PageType;
 
+import java.util.stream.Stream;
+
 /**
  * Contains utility methods used for parsing strings in the various *Parser classes.
  */

src/main/java/seedu/address/itinerary/model/event/Date.java

@@ -49,6 +49,12 @@ public static boolean isValidDate(String test) {
                     return false;
                 }
 
+            } else if (month.equals("04") | month.equals("06") | month.equals("09") | month.equals("11")) {
+
+                if (Integer.parseInt(day) > 31) {
+                    return false;
+                }
+
             } else {
 
                 if (month.equals("02")) {

src/main/java/seedu/address/itinerary/ui/ItineraryPage.java

@@ -53,7 +53,7 @@ public class ItineraryPage extends UiPart<VBox> implements Page {
 
     private TagDropdown tagDropdown;
 
-    private HelpWindow helpWindow;
+    private HelpCommandWindow helpWindow;
 
     private CodeWindow codeWindow;
 
@@ -107,7 +107,7 @@ public ItineraryPage(ItineraryLogic itineraryLogic) {
 
         setAccelerators();
 
-        this.helpWindow = new HelpWindow();
+        this.helpWindow = new HelpCommandWindow();
         this.codeWindow = new CodeWindow();
 
         fillInnerParts();

src/main/java/seedu/address/ui/CommandBox.java

@@ -53,6 +53,7 @@ public CommandBox(CommandExecutor commandExecutor, List<String> history, String[
         // calls #setStyleToDefault() whenever there is a change to the text of the command box.
         commandTextField.textProperty().addListener((unused1, unused2, unused3) -> setStyleToDefault());
 
+        // Credits to the implementation of the controlsfx library
         AutoCompletionBinding<String> autoComplete =
                 TextFields.bindAutoCompletion(commandTextField, possibleSuggestions);
         autoComplete.setVisibleRowCount(3);