Weka

emmas/pom.xml

@@ -33,7 +33,6 @@
   </dependencyManagement>
 
   <dependencies>
-
     <dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>
@@ -45,7 +44,6 @@
       <artifactId>mysql-connector-j</artifactId>
       <version>9.2.0</version>
     </dependency>
-
     <dependency>
       <groupId>jakarta.servlet</groupId>
       <artifactId>jakarta.servlet-api</artifactId>
@@ -55,6 +53,11 @@
       <groupId>org.hibernate.orm</groupId>
       <artifactId>hibernate-core</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.hibernate.validator</groupId>
+      <artifactId>hibernate-validator</artifactId>
+      <version>8.0.0.Final</version>
+    </dependency>
     <dependency>
       <groupId>jakarta.transaction</groupId>
       <artifactId>jakarta.transaction-api</artifactId>

emmas/src/main/java/dev/brianweloba/dao/EventDAO.java

@@ -29,25 +29,19 @@ public Event create(Event event) {
     }
 
     public int countAll(){
-        EntityManager manager = HibernateUtil.getEntityManager();
-        try{
-            return  manager.createQuery("SELECT COUNT(e) FROM Event e",Long.class)
+        try (EntityManager manager = HibernateUtil.getEntityManager()) {
+            return manager.createQuery("SELECT COUNT(e) FROM Event e", Long.class)
                     .getSingleResult()
                     .intValue();
-        }finally {
-            manager.close();
         }
     }
 
     public List<Event> findPaginated(int startIndex, int pageSize){
-        EntityManager manager = HibernateUtil.getEntityManager();
-        try{
-            return manager.createQuery("SELECT e FROM Event e ORDER BY e.eventDate",Event.class)
+        try (EntityManager manager = HibernateUtil.getEntityManager()) {
+            return manager.createQuery("SELECT e FROM Event e ORDER BY e.eventDate", Event.class)
                     .setFirstResult(startIndex)
                     .setMaxResults(pageSize)
                     .getResultList();
-        }finally {
-            manager.close();
         }
     }
 
@@ -82,7 +76,7 @@ public Event findByIdAndToken(Long id,String token){
             query.setParameter("token", token);
             System.out.println("Token: " + token);
             System.out.println("Id: " + id);
-            System.out.println("Query: " + query.toString());
+            System.out.println("Query: " + query);
             return query.getSingleResult();
         }catch (Exception e) {
             if (manager.getTransaction().isActive()) {
@@ -104,12 +98,12 @@ public List<Event> findAll() {
         }
     }
 
-    public boolean update(Event event,String token) {
+    public void update(Event event, String token) {
         EntityManager manager = HibernateUtil.getEntityManager();
         try {
             Event eventToUpdate = findByIdAndToken(event.getId(),token);
             if(eventToUpdate == null){
-                return false;
+                return;
             }
             manager.getTransaction().begin();
 
@@ -122,7 +116,6 @@ public boolean update(Event event,String token) {
             manager.merge(eventToUpdate);
 
             manager.getTransaction().commit();
-            return true;
         } catch (Exception e) {
             if (manager.getTransaction().isActive()) {
                 manager.getTransaction().rollback();

emmas/src/main/java/dev/brianweloba/model/Event.java

@@ -1,6 +1,7 @@
 package dev.brianweloba.model;
 
 import jakarta.persistence.*;
+import jakarta.validation.constraints.*;
 import lombok.Data;
 
 import java.util.Date;
@@ -15,21 +16,29 @@ public class Event {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
+    @NotBlank(message = "Event title is required")
+    @Size(min = 3, max = 100, message = "Title must be between 3 and 100 characters")
     @Column(nullable = false)
     private String title;
 
     @Column(name = "event_type")
     private String eventType;
 
+    @NotBlank(message = "Host name is required")
     @Column(name = "event_host")
     private String eventHost;
 
+    @NotBlank(message = "Event location is required")
     @Column(name = "event_location")
     private String eventLocation;
 
+    @NotBlank(message = "Event description is required")
+    @Size(min = 10,max = 255, message = "Description be between 10 and 255 characters")
     @Column(columnDefinition = "TEXT")
     private String description;
 
+    @NotNull(message = "Event date is required")
+    @Future(message = "Event date must be in the future")
     @Column(name = "event_date")
     private Date eventDate;
 
@@ -39,6 +48,7 @@ public class Event {
     @Column(name = "updated_at", insertable = false, updatable = false, columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
     private Date updatedAt;
 
+    @Min(value = 1, message = "Event capacity must be at least 1")
     @Column(name = "event_capacity")
     private int eventCapacity;
 

emmas/src/main/java/dev/brianweloba/services/EventService.java

@@ -0,0 +1,34 @@
+package dev.brianweloba.services;
+
+import dev.brianweloba.model.Event;
+import jakarta.servlet.http.HttpServletRequest;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class EventService {
+    public void buildEventFromRequest(HttpServletRequest request, Event event) {
+        event.setTitle(request.getParameter("title"));
+        event.setDescription(request.getParameter("description"));
+        event.setEventHost(request.getParameter("eventHost"));
+        event.setEventLocation(request.getParameter("eventLocation"));
+
+        String capacityStr = request.getParameter("eventCapacity");
+        try {
+            int capacity = Integer.parseInt(capacityStr);
+            event.setEventCapacity(capacity);
+        } catch (NumberFormatException e) {
+            request.setAttribute("capacityError", "Invalid capacity value");
+        }
+
+        String dateStr = request.getParameter("eventDate");
+        try {
+            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+            Date eventDate = sdf.parse(dateStr);
+            event.setEventDate(eventDate);
+        } catch (ParseException e) {
+            request.setAttribute("dateError", "Invalid date format");
+        }
+    }
+}

emmas/src/main/java/dev/brianweloba/servlet/CreateEvent.java

@@ -4,15 +4,9 @@
 import dev.brianweloba.model.Event;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.annotation.WebServlet;
-import jakarta.servlet.http.Cookie;
-import jakarta.servlet.http.HttpServlet;
-import jakarta.servlet.http.HttpServletRequest;
-import jakarta.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.*;
 
 import java.io.IOException;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
 
 @WebServlet("/events/create")
 public class CreateEvent extends HttpServlet {
@@ -26,27 +20,27 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response)
 
     @Override
     protected void doPost(HttpServletRequest request, HttpServletResponse response)
-            throws IOException {
-        Event event = new Event();
-
-        event.setTitle(request.getParameter("title"));
-        event.setEventHost(request.getParameter("eventHost"));
-        event.setDescription(request.getParameter("description"));
-        event.setEventType(request.getParameter("eventType"));
-        event.setEventLocation(request.getParameter("location"));
-        event.setEventCapacity(Integer.parseInt(request.getParameter("eventCapacity")));
-
-        String dateString = request.getParameter("eventDate");
-        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
-        try {
-            Date eventDate = dateFormat.parse(dateString);
-            event.setEventDate(eventDate);
-        } catch (ParseException e) {
-            throw new RuntimeException(e);
+            throws IOException, ServletException {
+        HttpSession session = request.getSession();
+        Event event = (Event) session.getAttribute("event");
+
+        if (event == null) {
+            response.sendRedirect(request.getContextPath() + "/events/create");
+            return;
         }
+
+        event.setEventType(request.getParameter("eventType").toUpperCase());
+
+        if(event.getEventType().isEmpty()){
+            request.setAttribute("eventTypeError", "Event Type is empty");
+            request.getRequestDispatcher("/WEB-INF/views/prediction.jsp").forward(request, response);
+            return;
+        }
+
         event = eventDAO.create(event);
+        session.removeAttribute("event");
 
-        Cookie tokenCookie = new Cookie("event_"+event.getId()+"_token", event.getEditToken());
+        Cookie tokenCookie = new Cookie("event_" + event.getId() + "_token", event.getEditToken());
         tokenCookie.setMaxAge(60 * 60 * 24 * 365);
         tokenCookie.setPath("/");
         response.addCookie(tokenCookie);

emmas/src/main/java/dev/brianweloba/servlet/EventServlet.java

@@ -1,20 +1,16 @@
 package dev.brianweloba.servlet;
 
-import java.io.IOException;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.List;
-
 import dev.brianweloba.dao.EventDAO;
 import dev.brianweloba.model.Event;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.annotation.WebServlet;
-import jakarta.servlet.http.Cookie;
 import jakarta.servlet.http.HttpServlet;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 
+import java.io.IOException;
+import java.util.List;
+
 @WebServlet("/events")
 public class EventServlet extends HttpServlet {
     private final EventDAO eventDAO = new EventDAO();
@@ -24,27 +20,23 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
 
         int pageSize = 10;
-        int currentPage =1;
-
-        try{
-            String pageSizeParam = request.getParameter("size");
-            if(pageSizeParam != null){
-                pageSize = Integer.parseInt(pageSizeParam);
-            }
+        int currentPage = 1;
 
-            String pageParam = request.getParameter("page");
-            if(pageParam!=null){
-                currentPage = Integer.parseInt(pageParam);
-            }
-        }catch (NumberFormatException e){
+        String pageSizeParam = request.getParameter("size");
+        if (pageSizeParam != null) {
+            pageSize = Integer.parseInt(pageSizeParam);
+        }
 
+        String pageParam = request.getParameter("page");
+        if (pageParam != null) {
+            currentPage = Integer.parseInt(pageParam);
         }
 
-        int startIndex = (currentPage-1)*pageSize;
+        int startIndex = (currentPage - 1) * pageSize;
         int totalEvents = eventDAO.countAll();
-        int totalPages = (int) Math.ceil((double) totalEvents/pageSize);
+        int totalPages = (int) Math.ceil((double) totalEvents / pageSize);
 
-        List<Event> events = eventDAO.findPaginated(startIndex,pageSize);
+        List<Event> events = eventDAO.findPaginated(startIndex, pageSize);
 
         request.setAttribute("events", events);
         request.setAttribute("currentPage", currentPage);
@@ -57,43 +49,4 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response)
         request.setAttribute("events", events);
         request.getRequestDispatcher("/WEB-INF/views/events.jsp").forward(request, response);
     }
-
-    @Override
-    protected void doPost(HttpServletRequest request, HttpServletResponse response)
-            throws IOException {
-        Long id = Long.parseLong(request.getParameter("id"));
-//        String token = request.getParameter("token");
-        String token = getEditTokenFromCookies(request, id);
-        Event event = eventDAO.findByIdAndToken(id, token);
-
-        event.setTitle(request.getParameter("title"));
-        event.setEventHost(request.getParameter("eventHost"));
-        event.setDescription(request.getParameter("description"));
-        event.setEventType(request.getParameter("eventType"));
-        event.setEventLocation(request.getParameter("location"));
-        event.setEventCapacity(Integer.parseInt(request.getParameter("eventCapacity")));
-
-        String dateString = request.getParameter("eventDate");
-        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
-        try {
-            Date eventDate = dateFormat.parse(dateString);
-            event.setEventDate(eventDate);
-        } catch (ParseException e) {
-            throw new RuntimeException(e);
-        }
-        eventDAO.update(event, token);
-        response.sendRedirect(request.getContextPath() + "/events");
-    }
-
-    private String getEditTokenFromCookies(HttpServletRequest request, Long eventId) {
-        Cookie[] cookies = request.getCookies();
-        if (cookies != null) {
-            for (Cookie cookie : cookies) {
-                if (cookie.getName().equals("event_" + eventId + "_token")) {
-                    return cookie.getValue();
-                }
-            }
-        }
-        return null;
-    }
 }