Logout Command had been added and working

src/main/java/com/t13g2/forum/logic/commands/AddUserCommand.java

@@ -46,26 +46,19 @@ public CommandResult execute(Model model, CommandHistory history) throws Command
         try (UnitOfWork unitOfWork = new UnitOfWork()) {
             boolean exist = false;
             try {
-                unitOfWork.getUserRepository().getUserByUsername(userToAdd.getUsername());
-                exist = true;
+                if (userToAdd == unitOfWork.getUserRepository().getUserByUsername(userToAdd.getUsername())) {
+                    exist = true;
+                    new CommandResult(String.format(MESSAGE_DUPLICATE_PERSON));
+                }
+
             } catch (EntityDoesNotExistException ex) {
+                if (!exist) {
+                    unitOfWork.getUserRepository().addUser(userToAdd);
+                    unitOfWork.commit();
+                }
                 ex.printStackTrace();
             }
-            if (!exist) {
-                unitOfWork.getUserRepository().addUser(userToAdd);
-                unitOfWork.commit();
-            }
-            // try {
-            //     if(unitOfWork.getUserRepository().getUserByUsername(this.userToAdd.getUsername()) == null) {
-            //         unitOfWork.getUserRepository().addUser(userToAdd);
-            //         unitOfWork.commit();
-            //     }
-            //     else {
-            //         throw new CommandException(MESSAGE_DUPLICATE_PERSON);
-            //     }
-            // } catch (Exception e) {
-            //     e.printStackTrace();
-            // }
+
         } catch (Exception e) {
             e.printStackTrace();
         }

src/main/java/com/t13g2/forum/logic/commands/LoginCommand.java

@@ -42,7 +42,7 @@ public CommandResult execute(Model model, CommandHistory history) throws Command
         if (loggedInSuccess) {
             return new CommandResult(String.format(MESSAGE_SUCCESS, userName));
         } else {
-            return new CommandResult(MESSAGE_FAIL);
+            return new CommandResult(String.format(MESSAGE_FAIL, userName));
         }
     }
 }

src/main/java/com/t13g2/forum/logic/commands/LogoutCommand.java

@@ -0,0 +1,41 @@
+package com.t13g2.forum.logic.commands;
+
+import static java.util.Objects.requireNonNull;
+
+import com.t13g2.forum.logic.CommandHistory;
+import com.t13g2.forum.logic.commands.exceptions.CommandException;
+import com.t13g2.forum.model.Model;
+import com.t13g2.forum.storage.forum.Context;
+/**
+ *
+ */
+public class LogoutCommand extends Command {
+    public static final String COMMAND_WORD = "logout";
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ": logout from the forum book. ";
+
+
+    public static final String MESSAGE_SUCCESS = "Good bye : %1$s";
+    public static final String MESSAGE_FAIL = "No user logged in to Logout";
+    private String userName;
+    private Boolean canLogout;
+
+    public LogoutCommand() {
+        if (Context.getInstance().getCurrentUser() != null) {
+            this.userName = Context.getInstance().getCurrentUser().getUsername();
+            Context.getInstance().setCurrentUser(null);
+            canLogout = true;
+        } else {
+            canLogout = false;
+        }
+    }
+
+    @Override
+    public CommandResult execute(Model model, CommandHistory history) throws CommandException {
+        requireNonNull(model);
+        if (canLogout) {
+            return new CommandResult(String.format(MESSAGE_SUCCESS, userName));
+        } else {
+            return new CommandResult(String.format(MESSAGE_FAIL, userName));
+        }
+    }
+}

src/main/java/com/t13g2/forum/logic/commands/UpdateUserCommand.java

@@ -0,0 +1,53 @@
+package com.t13g2.forum.logic.commands;
+
+import static com.t13g2.forum.logic.parser.CliSyntax.PREFIX_USER_NAME;
+import static java.util.Objects.requireNonNull;
+
+import com.t13g2.forum.logic.CommandHistory;
+import com.t13g2.forum.logic.commands.exceptions.CommandException;
+import com.t13g2.forum.model.Model;
+import com.t13g2.forum.model.forum.User;
+import com.t13g2.forum.model.person.Person;
+
+/**
+ * Deletes a specific user by admin
+ */
+public class UpdateUserCommand extends Command {
+    public static final String COMMAND_WORD = "updateUser";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Update a certain user's password, email and/or phone. "
+        + "Parameters: "
+        + PREFIX_USER_NAME + "USER NAME "
+        + "Example: " + COMMAND_WORD + " "
+        + PREFIX_USER_NAME + "john ";
+
+    public static final String MESSAGE_SUCCESS = "%1$s successfully updated.";
+    public static final String MESSAGE_INVALID_USER = "No user named %1$s found. Please verify and try again!";
+
+    private final String userNameToUpdate = "";
+    private final Person userToUpdate;
+
+    /**
+     * Creates an DeleteUserCommand to delete the specified {@code userName}.
+     */
+    public UpdateUserCommand(Person personToUpdate) {
+        requireNonNull(personToUpdate);
+        this.userToUpdate = personToUpdate;
+    }
+    @Override
+    public CommandResult execute(Model model, CommandHistory history) throws CommandException {
+        requireNonNull(model);
+        // if user has not login or is not admin, then throw exception
+        if (!model.checkIsLogin()) {
+            throw new CommandException(User.MESSAGE_NOT_LOGIN);
+        }
+        User userToDelete = model.doesUserExist(userNameToUpdate);
+        if (userToDelete == null) {
+            throw new CommandException(String.format(MESSAGE_INVALID_USER, userNameToUpdate));
+        } else {
+
+            //model.updatePerson(userNameToUpdate);
+        }
+        return new CommandResult(String.format(MESSAGE_SUCCESS, userNameToUpdate));
+    }
+}

src/main/java/com/t13g2/forum/logic/parser/AddressBookParser.java

@@ -26,6 +26,7 @@
 import com.t13g2.forum.logic.commands.ListCommand;
 import com.t13g2.forum.logic.commands.ListModuleCommand;
 import com.t13g2.forum.logic.commands.LoginCommand;
+import com.t13g2.forum.logic.commands.LogoutCommand;
 import com.t13g2.forum.logic.commands.RedoCommand;
 import com.t13g2.forum.logic.commands.SelectCommand;
 import com.t13g2.forum.logic.commands.SelectModuleCommand;
@@ -140,6 +141,9 @@ public Command parseCommand(String userInput) throws ParseException {
         case AddUserCommand.COMMAND_WORD:
             return new AddUserCommandParser().parse(arguments);
 
+        case LogoutCommand.COMMAND_WORD:
+            return new LogoutCommand();
+
         default:
             throw new ParseException(MESSAGE_UNKNOWN_COMMAND);
         }