Web Pizza Service [by Alexander Nalivayko]

modules/pizza-service-alex-n/pom.xml

@@ -4,6 +4,7 @@
     <groupId>com.hillel.elementary.java-geeks</groupId>
     <artifactId>pizza-service-alex-n</artifactId>
     <version>0.0.1</version>
+    <packaging>war</packaging>
 
 
     <parent>
@@ -45,6 +46,17 @@
             <artifactId>slf4j-api</artifactId>
             <version>1.7.25</version>
         </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+            <version>4.0.1</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>jstl</artifactId>
+            <version>1.2</version>
+        </dependency>
     </dependencies>
 
     <build>

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/Runner.java

@@ -12,7 +12,7 @@ private Runner() {
 
     public static void main(String[] args) {
 
-        Context context = new DefaultPizzaServiceContext(new PizzaServiceConfig());
+        Context context = DefaultPizzaServiceContext.getInstance(new PizzaServiceConfig());
         Controller controller = context.getBean("controller");
         controller.runUserInterface();
     }

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/configs/DefaultPizzaServiceContext.java

@@ -15,13 +15,27 @@
 public class DefaultPizzaServiceContext implements Context {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(DefaultPizzaServiceContext.class);
-    private final Config config;
+    private Config config;
     private Map<String, Object> beans = new HashMap<>();
+    private static Context context;
 
-    public DefaultPizzaServiceContext(Config config) {
+    private DefaultPizzaServiceContext(Config config) {
         this.config = config;
     }
 
+    public static Context getInstance(Config config) {
+        if (context == null) {
+            synchronized (DefaultPizzaServiceContext.class) {
+                if (context == null) {
+                    context = new DefaultPizzaServiceContext(config);
+                }
+                return context;
+            }
+        } else {
+            return context;
+        }
+    }
+
     @Override
     public <T> T getBean(String beanName) {
         if (beanName == null || beanName.isEmpty()) {
@@ -70,7 +84,7 @@ private Object createNewBean(String beanName) {
 
         try {
             return constructor.newInstance(constructorArguments);
-        } catch (Exception e){
+        } catch (Exception e) {
             LOGGER.error("Can't create instance of bean " + e);
             throw new AppInitialisationException(e.getMessage());
         }

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/domain/Customer.java

@@ -5,14 +5,29 @@
 public class Customer {
     private Long id;
     private String name;
+    private String password;
+    private String phone;
+
+    public Customer(String name) {
+        this.name = name;
+    }
 
     public Customer(Long id, String name) {
         this.id = id;
         this.name = name;
     }
 
-    public Customer(String name) {
+    public Customer(Long id, String name, String password, String phone) {
+        this.id = id;
+        this.name = name;
+        this.password = password;
+        this.phone = phone;
+    }
+
+    public Customer(String name, String password, String phone) {
         this.name = name;
+        this.password = password;
+        this.phone = phone;
     }
 
     public Long getId() {
@@ -23,6 +38,15 @@ public String getName() {
         return name;
     }
 
+
+    public String getPassword() {
+        return password;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
     @Override
     public String toString() {
         return "Customer{" +

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/repositories/CustomerRepo.java

@@ -9,4 +9,6 @@ public interface CustomerRepo {
     Customer save(Customer customer);
 
     Collection<Customer> getAll();
+
+    Customer getCustomerByName(String name);
 }

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/repositories/InMemCustomerRepo.java

@@ -15,7 +15,7 @@ public class InMemCustomerRepo implements CustomerRepo {
 
     @Override
     public Customer save(Customer customer) {
-        Customer savedCustomer = new Customer(counter, customer.getName());
+        Customer savedCustomer = new Customer(counter, customer.getName(), customer.getPassword(), customer.getPhone());
         customers.put(counter, savedCustomer);
         counter++;
         return savedCustomer;
@@ -25,4 +25,14 @@ public Customer save(Customer customer) {
     public Collection<Customer> getAll() {
         return customers.values();
     }
+
+    @Override
+    public Customer getCustomerByName(String name) {
+        for (Customer customer : customers.values()) {
+            if (customer.getName().equals(name)){
+                return customer;
+            }
+        }
+        return null;
+    }
 }

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/services/CustomerService.java

@@ -8,7 +8,11 @@ public interface CustomerService {
 
     Customer registerCustomer(Customer customer);
 
+    Customer registerCustomer(String customerName, String pass, String phone);
+
     Customer registerCustomer(String customerName);
 
     Collection<Customer> getAllCustomers();
+
+    Customer signIn(String name, String pass);
 }

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/services/DefaultCustomerService.java

@@ -3,6 +3,7 @@
 import com.hillel.elementary.java_geeks.configs.anotations.Component;
 import com.hillel.elementary.java_geeks.domain.Customer;
 import com.hillel.elementary.java_geeks.repositories.CustomerRepo;
+import org.apache.commons.codec.digest.DigestUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -38,6 +39,26 @@ public Customer registerCustomer(Customer customer) {
         return customerRepo.save(customer);
     }
 
+    @Override
+    public Customer registerCustomer(String customerName, String pass, String phone) {
+        if (customerName == null ||
+                customerName.isEmpty() ||
+                pass == null ||
+                pass.isEmpty() ||
+                phone == null ||
+                phone.isEmpty()) {
+            String msg = "Can not create and save customer name:" + customerName + ",pass:" + pass + ",phone:" + phone;
+            LOGGER.error(msg);
+            return null;
+        } else {
+            if (customerRepo.getCustomerByName(customerName) != null) {
+                return null;
+            } else {
+                return customerRepo.save(new Customer(customerName, DigestUtils.md5Hex(pass), phone));
+            }
+        }
+    }
+
     @Override
     public Customer registerCustomer(String customerName) {
         if (customerName == null || customerName.isEmpty() || customerName.trim().isEmpty()) {
@@ -52,4 +73,22 @@ public Customer registerCustomer(String customerName) {
     public Collection<Customer> getAllCustomers() {
         return customerRepo.getAll();
     }
+
+
+    @Override
+    public Customer signIn(String name, String pass) {
+        if (name == null || pass == null || name.isEmpty() || pass.isEmpty()) {
+            String msg = "can't sign in user with name:" + name + ", pass:" + pass;
+            LOGGER.error(msg);
+            return null;
+        } else {
+            Customer customer = customerRepo.getCustomerByName(name);
+            if (customer == null) {
+                return null;
+            } else if (customer.getPassword().equals(DigestUtils.md5Hex(pass))) {
+                return customer;
+            }
+        }
+        return null;
+    }
 }

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/utils/CookieParser.java

@@ -0,0 +1,21 @@
+package com.hillel.elementary.java_geeks.utils;
+
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+
+public class CookieParser {
+
+    private CookieParser() {
+    }
+
+    public static String getCookieValue(String cookieName, HttpServletRequest req){
+        if (req.getCookies() != null) {
+            for (Cookie cookie : req.getCookies()) {
+                if (cookie.getName().equals(cookieName)) {
+                    return cookie.getValue();
+                }
+            }
+        }
+        return null;
+    }
+}

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/utils/Sessions.java

@@ -0,0 +1,40 @@
+package com.hillel.elementary.java_geeks.utils;
+
+import com.hillel.elementary.java_geeks.domain.Pizza;
+
+import javax.servlet.http.HttpSession;
+import java.util.ArrayList;
+
+public class Sessions {
+
+    private Sessions() {
+    }
+
+    public static ArrayList<Pizza> getPizzasList(HttpSession session, String attrName) {
+        Object attribute = session.getAttribute(attrName);
+        if (attribute != null) {
+            return (ArrayList<Pizza>) attribute;
+        }
+        return null;
+    }
+
+    public static void addPizzaToSessionOrder(HttpSession session, String attrName, Pizza pizza) {
+        Object attribute = session.getAttribute(attrName);
+        ArrayList<Pizza> pizzas;
+        if (attribute != null) {
+            pizzas = (ArrayList<Pizza>) attribute;
+        } else {
+            pizzas = new ArrayList<>();
+        }
+        pizzas.add(pizza);
+        session.setAttribute(attrName, pizzas);
+    }
+
+    public static int getSessionOrderPizzasCount(HttpSession session, String attrName) {
+        Object attribute = session.getAttribute(attrName);
+        if (attribute != null) {
+            return ((ArrayList<Pizza>) attribute).size();
+        }
+        return 0;
+    }
+}

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/web/HomePageServlet.java

@@ -0,0 +1,47 @@
+package com.hillel.elementary.java_geeks.web;
+
+import com.hillel.elementary.java_geeks.configs.Context;
+import com.hillel.elementary.java_geeks.configs.DefaultPizzaServiceContext;
+import com.hillel.elementary.java_geeks.configs.PizzaServiceConfig;
+import com.hillel.elementary.java_geeks.services.PizzaService;
+import com.hillel.elementary.java_geeks.utils.Sessions;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+public class HomePageServlet extends HttpServlet {
+
+    private PizzaService pizzaService;
+    private static final String ATTR_NAME = "orderedPizza";
+
+    @Override
+    public void init() {
+        Context context = DefaultPizzaServiceContext.getInstance(new PizzaServiceConfig());
+        pizzaService = context.getBean("pizzaService");
+    }
+
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.setAttribute("pizzas", pizzaService.getAllPizzas());
+        req.getRequestDispatcher("home.jsp").forward(req, resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        if (req.getParameter("add-btn") != null) {
+            String pizzaId = req.getParameter("pizzaId");
+            if (pizzaId != null) {
+                Sessions.addPizzaToSessionOrder(req.getSession(),
+                        ATTR_NAME,
+                        pizzaService.getPizzaById(Integer.parseInt(pizzaId)));
+            }
+        }
+        req.setAttribute("pizzas", pizzaService.getAllPizzas());
+        req.getRequestDispatcher("home.jsp").forward(req, resp);
+    }
+
+}

modules/pizza-service-alex-n/src/main/java/com/hillel/elementary/java_geeks/web/OrderServlet.java

@@ -0,0 +1,57 @@
+package com.hillel.elementary.java_geeks.web;
+
+import com.hillel.elementary.java_geeks.configs.Context;
+import com.hillel.elementary.java_geeks.configs.DefaultPizzaServiceContext;
+import com.hillel.elementary.java_geeks.configs.PizzaServiceConfig;
+import com.hillel.elementary.java_geeks.domain.Pizza;
+import com.hillel.elementary.java_geeks.services.OrderService;
+import com.hillel.elementary.java_geeks.services.PizzaService;
+import com.hillel.elementary.java_geeks.utils.Sessions;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.List;
+
+
+public class OrderServlet extends HttpServlet {
+
+    private static final String ATTR_NAME = "orderedPizza";
+    private OrderService orderService;
+    private PizzaService pizzaService;
+
+    @Override
+    public void init() throws ServletException {
+        Context context = DefaultPizzaServiceContext.getInstance(new PizzaServiceConfig());
+        pizzaService = context.getBean("pizzaService");
+        orderService = context.getBean("orderService");
+    }
+
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        List<Pizza> pizzas = Sessions.getPizzasList(req.getSession(), ATTR_NAME);
+        if (pizzas != null) {
+            req.setAttribute("pizzas", pizzas);
+            req.setAttribute("count", pizzas.size());
+        }
+        req.getRequestDispatcher("order.jsp").forward(req, resp);
+    }
+
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        String userBtnValue = req.getParameter("usr-data-btn");
+        if (userBtnValue != null) {
+            if (userBtnValue.equals("delete all")) {
+                req.getSession().removeAttribute(ATTR_NAME);
+            } else if (userBtnValue.equals("create")) {
+                String name = req.getParameter("name");
+                //todo
+            }
+        }
+        req.getRequestDispatcher("order.jsp").forward(req, resp);
+    }
+}