feat: expand struts demo lab

web/WEB-INF/classes/com/demo/action/UserAction.java

@@ -0,0 +1,84 @@
+package com.demo.action;
+
+import com.opensymphony.xwork2.ActionSupport;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class UserAction extends ActionSupport {
+
+    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+    private String username;
+    private String email;
+    private String phone;
+    private String submittedAt;
+    private String profileStage;
+
+    public String submit() {
+        username = normalize(username);
+        email = normalize(email);
+        phone = normalize(phone);
+
+        if (!isValid()) {
+            return INPUT;
+        }
+
+        submittedAt = LocalDateTime.now().format(TIME_FORMATTER);
+        profileStage = (phone != null && phone.length() >= 7) ? "Profile ready for follow-up demos." : "Profile captured. Add a stronger phone number next time.";
+        return SUCCESS;
+    }
+
+    private boolean isValid() {
+        boolean valid = true;
+        if (username == null || username.length() < 3) {
+            addFieldError("username", "Username must be at least 3 characters.");
+            valid = false;
+        }
+        if (email == null || !email.contains("@")) {
+            addFieldError("email", "Enter a valid email address.");
+            valid = false;
+        }
+        if (phone == null || phone.replaceAll("[^0-9]", "").length() < 7) {
+            addFieldError("phone", "Enter at least 7 digits for the phone number.");
+            valid = false;
+        }
+        return valid;
+    }
+
+    private String normalize(String value) {
+        return value == null ? null : value.trim();
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getSubmittedAt() {
+        return submittedAt;
+    }
+
+    public String getProfileStage() {
+        return profileStage;
+    }
+}