From 0deca9eda5c5150d6f099475f38c93a34538ec49 Mon Sep 17 00:00:00 2001
From: Feror <contact@feror.fr>
Date: Thu, 30 Jan 2025 10:05:23 +0100
Subject: [PATCH] Utilisation du design pattern observer

---
 .../src/main/java/org/example/Accounting.java |  2 +-
 panier/src/main/java/org/example/Cart.java    | 36 +++++++++++++------
 .../src/main/java/org/example/Observable.java |  7 ++++
 .../src/main/java/org/example/Observer.java   |  5 +++
 .../java/org/example/StockManagement.java     |  2 +-
 .../src/test/java/org/example/CartTest.java   |  9 ++---
 6 files changed, 45 insertions(+), 16 deletions(-)
 create mode 100644 panier/src/main/java/org/example/Observable.java
 create mode 100644 panier/src/main/java/org/example/Observer.java

diff --git a/panier/src/main/java/org/example/Accounting.java b/panier/src/main/java/org/example/Accounting.java
index 56d4b10..3f7c842 100644
--- a/panier/src/main/java/org/example/Accounting.java
+++ b/panier/src/main/java/org/example/Accounting.java
@@ -1,6 +1,6 @@
 package org.example;
 
-public class Accounting {
+public class Accounting implements Observer<String> {
     private String accounting;
 
     public Accounting(String pAccounting) {
diff --git a/panier/src/main/java/org/example/Cart.java b/panier/src/main/java/org/example/Cart.java
index 3049b75..79d715d 100644
--- a/panier/src/main/java/org/example/Cart.java
+++ b/panier/src/main/java/org/example/Cart.java
@@ -1,14 +1,14 @@
 package org.example;
 
-public class Cart {
-    private StockManagement stock;
-    private Accounting accounting;
-    private String content;
+import java.util.ArrayList;
 
-    public Cart(StockManagement pStock, Accounting pAccounting) {
-        this.stock = pStock;
-        this.accounting = pAccounting;
-        this.content = new String ("Contenu du panier");
+public class Cart implements Observable<String> {
+    private String content;
+    private ArrayList<Observer<String>> observers;
+
+    public Cart() {
+        this.observers = new ArrayList<>();
+        this.content = "Contenu du panier";
     }
 
     public String getContent() {
@@ -16,7 +16,23 @@ public class Cart {
     }
 
     public void initiateOrder() {
-        this.stock.process(this.content);
-        this.accounting.process(this.content);
+        notifyObserver();
+    }
+
+    @Override
+    public void addObserver(Observer<String> obs) {
+        observers.add(obs);
+    }
+
+    @Override
+    public void removeObserver(Observer<String> obs) {
+        observers.remove(obs);
+    }
+
+    @Override
+    public void notifyObserver() {
+        for (Observer<String> obs : observers) {
+            obs.process(this.content);
+        }
     }
 }
diff --git a/panier/src/main/java/org/example/Observable.java b/panier/src/main/java/org/example/Observable.java
new file mode 100644
index 0000000..577275e
--- /dev/null
+++ b/panier/src/main/java/org/example/Observable.java
@@ -0,0 +1,7 @@
+package org.example;
+
+public interface Observable<T> {
+    public void addObserver(Observer<T> obs);
+    public void removeObserver(Observer<T> obs);
+    public void notifyObserver();
+}
diff --git a/panier/src/main/java/org/example/Observer.java b/panier/src/main/java/org/example/Observer.java
new file mode 100644
index 0000000..9eaef7a
--- /dev/null
+++ b/panier/src/main/java/org/example/Observer.java
@@ -0,0 +1,5 @@
+package org.example;
+
+public interface Observer<T> {
+    public void process(T contenu);
+}
diff --git a/panier/src/main/java/org/example/StockManagement.java b/panier/src/main/java/org/example/StockManagement.java
index e6531ae..0cabd64 100644
--- a/panier/src/main/java/org/example/StockManagement.java
+++ b/panier/src/main/java/org/example/StockManagement.java
@@ -1,6 +1,6 @@
 package org.example;
 
-public class StockManagement {
+public class StockManagement implements Observer<String> {
     private String stockManagement;
 
     public StockManagement(String pStockManagement) {
diff --git a/panier/src/test/java/org/example/CartTest.java b/panier/src/test/java/org/example/CartTest.java
index 1d3c312..69bfaf7 100644
--- a/panier/src/test/java/org/example/CartTest.java
+++ b/panier/src/test/java/org/example/CartTest.java
@@ -10,9 +10,7 @@ import static org.junit.jupiter.api.Assertions.*;
 class CartTest {
     @Test
     void testGetContenu() {
-        StockManagement stock = new StockManagement("Stock1");
-        Accounting compta = new Accounting("Compta1");
-        Cart cart = new Cart(stock, compta);
+        Cart cart = new Cart();
 
         assertEquals("Contenu du panier", cart.getContent());
     }
@@ -21,7 +19,10 @@ class CartTest {
     void testInitiateOrder() {
         StockManagement stock = new StockManagement("Stock1");
         Accounting compta = new Accounting("Compta1");
-        Cart cart = new Cart(stock, compta);
+        Cart cart = new Cart();
+
+        cart.addObserver(stock);
+        cart.addObserver(compta);
 
         ByteArrayOutputStream outContent = new ByteArrayOutputStream();
         System.setOut(new PrintStream(outContent));