Merge pull request #143 from yuheem/140-add-help

Add help command

src/main/java/seedu/budgetbaby/logic/commands/HelpCommand.java

@@ -0,0 +1,20 @@
+package seedu.budgetbaby.logic.commands;
+
+import seedu.budgetbaby.model.BudgetBabyModel;
+
+/**
+ * Format help instructions for every command for display.
+ */
+public class HelpCommand extends BudgetBabyCommand {
+    public static final String COMMAND_WORD = "help";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Shows program usage instructions.\n"
+            + "Example: " + COMMAND_WORD;
+
+    public static final String SHOWING_HELP_MESSAGE = "Opened help window.";
+
+    @Override
+    public CommandResult execute(BudgetBabyModel model) {
+        return new CommandResult(SHOWING_HELP_MESSAGE, true, false);
+    }
+}

src/main/java/seedu/budgetbaby/logic/parser/BudgetBabyParser.java

@@ -6,13 +6,13 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import seedu.budgetbaby.ablogic.commands.HelpCommand;
 import seedu.budgetbaby.logic.commands.AddFrCommand;
 import seedu.budgetbaby.logic.commands.BudgetBabyCommand;
 import seedu.budgetbaby.logic.commands.DeleteFrCommand;
 import seedu.budgetbaby.logic.commands.EditFrCommand;
 import seedu.budgetbaby.logic.commands.ExitCommand;
 import seedu.budgetbaby.logic.commands.FindFrCommand;
+import seedu.budgetbaby.logic.commands.HelpCommand;
 import seedu.budgetbaby.logic.commands.RedoCommand;
 import seedu.budgetbaby.logic.commands.ResetFilterCommand;
 import seedu.budgetbaby.logic.commands.SetBudgetCommand;
@@ -78,6 +78,9 @@ public BudgetBabyCommand parseCommand(String userInput) throws ParseException {
         case ExitCommand.COMMAND_WORD:
             return new ExitCommand();
 
+        case HelpCommand.COMMAND_WORD:
+            return new HelpCommand();
+
         default:
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
         }