almost done

src/main/java/com/ecommerce/connection/DbConnection.java

@@ -1,75 +1,23 @@
 /*
  * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
- * Click nbfs://nbhost/SystemFileSystem/Templates/JSP_Servlet/Servlet.java to edit this template
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
  */
 package com.ecommerce.connection;
 
 import java.sql.Connection;
 import java.sql.DriverManager;
-import java.sql.ResultSet;
 import java.sql.SQLException;
 
 public class DbConnection {
-
-
-    public static Connection connection;
-
-    public static Connection getConnection(){
-
-        try{
-
-            Class.forName("com.mysql.jdbc.Driver");
-            connection = DriverManager.getConnection("jdbc:mysql://localhost:3368/ecommerce", "root","root");
-
-        }catch(Exception e){
-            e.printStackTrace();
-
-        }
-        return (connection);
-    }
-
-    public static void CloseConnection(){
-        if(connection !=null){
-            try{
-                connection.close();
-                connection =null;
-            }catch(SQLException ex){
-                ex.printStackTrace();
-            }
-        }   
-    }
+    private static  Connection connection = null;
 
-    public static ResultSet getResultFromSqlQuery(String SqlQueryString){
-
-        ResultSet rs = null;
-        try{
-            if (connection == null){
-                getConnection();
-            }
-
-            rs = connection.createStatement().executeQuery(SqlQueryString);
-
-        }catch(Exception ex){
-            ex.printStackTrace();
+    public static Connection getConnection() throws ClassNotFoundException, SQLException{
+        if(connection ==null){
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/ecommerce","root","rootroot");
+            System.out.print("connected");
 
         }
-        return rs;
-    }
-
-    public static int insertUpdateFromSqlQuery(String SqlQueryString){
-        int i = 2;
-        try{
-            if(connection ==null){
-                getConnection();
-            }
-
-            i = connection.createStatement().executeUpdate(SqlQueryString);
-        }catch(Exception ex){
-            ex.printStackTrace();
-
-        }
-        return i;
-
-
+        return connection;
     }
-}
+}  

src/main/java/com/ecommerce/dao/ProductDao.java

@@ -0,0 +1,107 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package com.ecommerce.dao;
+
+import com.ecommerce.loginpack.model.*;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.util.*;
+
+
+/**
+ *
+ * @author oladimeji
+ */
+public class ProductDao {
+    private Connection con;
+    private String query;
+    private PreparedStatement pst;
+    private ResultSet rs;
+
+    public ProductDao(Connection con) {
+        this.con = con;
+    }
+
+    public List<Product> getAllProducts(){
+        List<Product> products = new ArrayList<Product>();
+        try {
+            query = "select * from products";
+            pst = this.con.prepareStatement(query);
+            rs = pst.executeQuery();
+            while(rs.next()){
+                Product row = new Product();
+                row.setProductid(rs.getInt("productid"));
+                row.setName(rs.getString("name"));
+                row.setPrice(rs.getDouble("price"));
+                row.setCategory(rs.getString("category"));
+                row.setImage(rs.getString("image"));
+
+                products.add(row);
+            }
+
+
+        }catch(Exception e){
+            e.printStackTrace();
+        }
+
+        return products;
+
+    }
+
+    public List<Cart> getCartProducts(ArrayList<Cart> cartList){
+        List<Cart> products = new ArrayList<Cart>();
+
+        try{
+            if(cartList.size()>0){
+                for(Cart item:cartList){
+                    query = "select * from products where productid=?";
+                    pst = this.con.prepareStatement(query);
+                    pst.setInt(1,item.getProductid());
+                    rs = pst.executeQuery();
+                    while(rs.next()){
+                        Cart row = new Cart();
+                        row.setProductid(rs.getInt("productid"));
+                        row.setName(rs.getString("name"));
+                        row.setCategory(rs.getString("category"));
+                        row.setPrice(rs.getDouble("price")*item.getQuantity());
+                        row.setQuantity(item.getQuantity());
+                        products.add(row);
+                    }
+                }
+            }
+        }
+        catch(Exception e){
+            System.out.print(e.getMessage());
+        }
+        return products;
+    }
+    //creating an array list for all the products
+    public double getTotalCartPrice(ArrayList<Cart> cartList){
+        double sum =0;
+
+        try{
+            if(cartList.size()>0){
+                for(Cart item:cartList){
+                    query = "select price from products where productid=?";
+                    pst = this.con.prepareStatement(query);
+                    pst.setInt(1, item.getProductid());
+                    rs = pst.executeQuery();
+                    //adding the total price
+                    while(rs.next()){
+                        sum+=rs.getDouble("price")*item.getQuantity();
+                    }
+
+                }
+            }
+
+        }
+        catch(Exception e){
+            e.printStackTrace();
+        }
+        return sum;
+
+    }
+}

src/main/java/com/ecommerce/dao/UserDao.java

@@ -0,0 +1,51 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package com.ecommerce.dao;
+
+import com.ecommerce.loginpack.model.UserModelClass;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+/**
+ *
+ * @author oladimeji
+ */
+public class UserDao {
+    private Connection con;
+    private String query;
+    private PreparedStatement pst;
+    private ResultSet rs;
+
+     public UserDao(Connection con){
+         this.con = con;
+
+     }
+
+     public UserModelClass userLogin(String username, String password){
+         UserModelClass user = null;
+         try{
+             query = "select * from users where username=? and password=?";
+             pst = this.con.prepareStatement(query);
+             pst.setString(1, username);
+             pst.setString(2, password);
+             rs = pst.executeQuery();
+
+             if(rs.next()){
+                 user = new UserModelClass();
+                 user.setId(rs.getInt("userid"));
+                 user.setUsername(rs.getString("username"));
+
+             }
+         }catch(Exception e){
+             e.printStackTrace();
+             System.out.print(e.getMessage());
+
+         }
+         return user;
+
+     }
+
+}

src/main/java/com/ecommerce/login/AddCartServlet.java

@@ -0,0 +1,75 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/JSP_Servlet/Servlet.java to edit this template
+ */
+package com.ecommerce.login;
+
+import com.ecommerce.loginpack.model.*;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+/**
+ *
+ * @author oladimeji
+ */
+@WebServlet(name = "AddCartServlet", urlPatterns = {"/add-to-cart"})
+public class AddCartServlet extends HttpServlet {
+
+    /**
+     *
+     * @param request
+     * @param response
+     * @throws ServletException
+     * @throws IOException
+     */
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+        response.setContentType("text/html;charset=UTF-8");
+
+        try ( PrintWriter out = response.getWriter()) {
+            ArrayList<Cart> cartList = new ArrayList<>();
+
+            int id = Integer.parseInt(request.getParameter("id"));
+            Cart cm = new Cart();
+            cm.setProductid(id);
+            cm.setQuantity(1);
+
+            HttpSession session = request.getSession();
+            ArrayList<Cart> cart_list = (ArrayList<Cart>) session.getAttribute("cart-list");
+//session created and product added to the list
+            if (cart_list == null) {
+                cartList.add(cm);
+                session.setAttribute("cart-list", cartList);
+                response.sendRedirect("index.jsp");
+
+            } else {
+                cartList = cart_list;
+                boolean exist = false;
+// if the product is in the cart exist,display already exist message
+                for (Cart c : cart_list) {
+                    if (c.getProductid() == id) {
+                        exist = true;
+                        out.println("<h3 style='color:crimson; text-align:center'>Item already exist in Cart.<a href='cart.jsp'>Go to Cart</a></h3>");
+
+                    }
+
+                }
+                // product being added to the cart list
+                if (!exist) {
+                    cartList.add(cm);
+                    response.sendRedirect("index.jsp");
+                }
+            }                       
+        }
+
+    }
+
+}

src/main/java/com/ecommerce/login/LoginServlet.java

@@ -0,0 +1,67 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/JSP_Servlet/Servlet.java to edit this template
+ */
+package com.ecommerce.login;
+
+import com.ecommerce.connection.DbConnection;
+import com.ecommerce.dao.UserDao;
+import com.ecommerce.loginpack.model.UserModelClass;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.SQLException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ *
+ * @author oladimeji
+ */
+@WebServlet(name = "LoginServlet", urlPatterns = {"/user-login"})
+public class LoginServlet extends HttpServlet {
+
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+
+        response.sendRedirect("login.jsp");
+
+    }
+
+
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+        response.setContentType("text/html;charset=UTF-8");
+        try(PrintWriter out = response.getWriter()){
+            String username = request.getParameter("lusername");
+            String password = request.getParameter("lpassword");
+
+            try {
+                UserDao udao = new UserDao(DbConnection.getConnection());
+                UserModelClass user = udao.userLogin(username, password);
+
+                if(user !=null){
+                   request.getSession().setAttribute("'auth", user);
+                   response.sendRedirect("index.jsp");
+                }else{
+                   out.print("user login failed");
+
+                }
+            } catch (ClassNotFoundException | SQLException ex) {
+                Logger.getLogger(LoginServlet.class.getName()).log(Level.SEVERE, null, ex);
+            }
+
+
+
+        }
+
+    }
+
+}