feat(signup): add signup functionality

.config/accounts.json

@@ -1,8 +1,9 @@
 {
-  "users": [
-    {
-      "username": "a",
-      "password_hash": "$2a$10$t.g7znEK3FTRtqNZSHb4c.D.IdnUm8SBobTV/xjq6uvs7iB7qng/m"
-    }
-  ]
+  "users" : [ {
+    "username" : "a",
+    "password_hash" : "$2a$10$t.g7znEK3FTRtqNZSHb4c.D.IdnUm8SBobTV/xjq6uvs7iB7qng/m"
+  }, {
+    "username" : "trung",
+    "password_hash" : "$2a$10$70uOzzH2wXJLvLgrNUDhh.GsDgHvWYohjGJrsffBMaaQyZu2OuwkK"
+  } ]
 }

src/main/java/controller/Controller.java

@@ -2,25 +2,23 @@
 
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
-
 import javafx.scene.input.MouseEvent;
 import javafx.stage.Stage;
 import javafx.scene.control.*;
+import java.io.File;
+import java.util.List;
+import java.util.Objects;
+import java.util.logging.Logger;
+import java.util.logging.Level;
 
 import ui.LoginForm;
 import ui.SignUpForm;
 import ui.WebLogManager;
-
-import usermanagement.User;
-import usermanagement.UserManagement;
+import user.User;
+import user.UserManagement;
 
 import static utility.Utility.showAlert;
 
-import java.io.File;
-import java.util.List;
-import java.util.logging.Logger;
-import java.util.logging.Level;
-
 public class Controller {
     private Stage stage;
     private List<User> userLists;
@@ -33,13 +31,14 @@ public class Controller {
     @FXML
     private TextField rePasswordField;
 
+    // CONSTANT VALUE HERE
+    private String dbFilePath = System.getProperty("user.dir")
+            + File.separator
+            + ".config"
+            + File.separator
+            + "accounts.json";
+
     public void init(Stage stage) {
-        // CONSTANT VALUE HERE
-        String dbFilePath = System.getProperty("user.dir")
-                + File.separator
-                + ".config"
-                + File.separator
-                + "accounts.json";
         File dbFile = new File(dbFilePath);
         if (dbFile.exists()) {
             userLists = UserManagement.readUserFile(dbFilePath);
@@ -64,15 +63,31 @@ private void returnToLogin(MouseEvent event) throws Exception{
         loginForm.start(stage);
     }
     @FXML
-    private void handleSignupAccount(MouseEvent event) throws Exception{
+    private void handleSignupAccount(MouseEvent event) throws Exception {
         String username = usernameField.getText();
         String password = passwordField.getText();
         String rePassword = rePasswordField.getText();
 
-        System.out.println("Username: " + username);
-        System.out.println("Password: " + password);
-        System.out.println("Re-entered Password: " + rePassword);
+        if (username.isEmpty()) {
+            showAlert("ERROR", "Username can not be empty");
+            returnToLogin(event);
+            return;
+        }
+
+        if (password.length() < 8) {
+            showAlert("ERROR", "Password must be longer than 8 characters.");
+            returnToLogin(event);
+            return;
+        }
 
+        if (!Objects.equals(password, rePassword)) {
+            showAlert("ERROR",
+                    "Password and Re-enter password field must be the same."
+            );
+            returnToLogin(event);
+            return;
+        }
+        UserManagement.addUser(dbFilePath, username, password);
         returnToLogin(event);
     }
 
@@ -81,11 +96,9 @@ private void handleLoginAccount(MouseEvent event) throws Exception {
         String username = usernameField.getText();
         String password = passwordField.getText();
 
-        System.out.println("Username: " + username);
-        System.out.println("Password: " + password);
         boolean authenticated = UserManagement.authenticateUser(userLists, username, password);
         if (authenticated) {
-            logger.log(Level.INFO, "Login successful");
+            logger.log(Level.INFO, "Login successful with user " + username);
             WebLogManager webLogManager = new WebLogManager();
             webLogManager.start(stage);
         } else {

src/main/java/usermanagement/User.java → src/main/java/user/User.java

@@ -1,4 +1,4 @@
-package usermanagement;
+package user;
 
 public class User {
     private final String username;

src/main/java/usermanagement/UserManagement.java → src/main/java/user/UserManagement.java

@@ -1,7 +1,9 @@
-package usermanagement;
+package user;
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
 import org.mindrot.jbcrypt.BCrypt;
 
 import java.io.*;
@@ -43,17 +45,19 @@ public static boolean authenticateUser(List<User> userList, String username, Str
         return false;
     }
 
-    public static void addUser(String fileName, User user) {
-        try (BufferedWriter writer = new BufferedWriter(new FileWriter(fileName, true))) {
-            String hashedPassword = BCrypt.hashpw(user.getPasswordHash(), BCrypt.gensalt());
-            writer.write(user.getUsername() + "," + hashedPassword + "\n");
+    public static void addUser(String fileName, String username, String plaintextPassword) {
+        ObjectMapper objectMapper = new ObjectMapper();
+        try {
+            JsonNode rootNode = objectMapper.readTree(new File(fileName));
+            ArrayNode usersNode = (ArrayNode) rootNode.path("users");
+            String hashedPassword = BCrypt.hashpw(plaintextPassword, BCrypt.gensalt());
+            ObjectNode newUserNode = objectMapper.createObjectNode();
+            newUserNode.put("username", username);
+            newUserNode.put("password_hash", hashedPassword);
+            usersNode.add(newUserNode);
+            objectMapper.writerWithDefaultPrettyPrinter().writeValue(new File(fileName), rootNode);
         } catch (IOException e) {
             logger.log(Level.SEVERE, "An error occurred while writing to the user file", e);
         }
     }
-
-    public static void main(String[] args) {
-        System.out.println(BCrypt.hashpw("a", BCrypt.gensalt()));
-        System.out.println(BCrypt.checkpw("a", "$2a$10$t.g7znEK3FTRtqNZSHb4c.D.IdnUm8SBobTV/xjq6uvs7iB7qng/m"));
-    }
 }