Refactor: Make the Notification not send themself but rather create their content

src/entities/Notification.java

@@ -6,6 +6,9 @@ import utils.SendNotificationStrategy;
 public abstract class Notification {
     protected String content;
     protected User user;
+    /**
+     * Pas de change state car chemin multiple. On reste sur des enum !
+     */
     protected NotificationState state;
     protected SendNotificationStrategy strategy;
 
@@ -20,15 +23,29 @@ public abstract class Notification {
         return this.state != NotificationState.SENT && this.state != NotificationState.READ;
     }
 
-    public String getContent() {
-        return content;
+    /**
+     * Transition d'état spéciale pour indiquer que l'envoie de notification est en échec
+     */
+    public void setKoState() {
+        state = NotificationState.KO;
     }
 
     /**
-     * Pas de change state car route non linéaire. On reste sur des enum !
+     * Fait la transition des états
      */
+    public void transitionState() {
+        switch (state) {
+            case PENDING -> state = NotificationState.SENT;
+            case SENT -> state = NotificationState.READ;
+        }
+    }
 
-
-
-    public abstract void send();
+    public String getContent() {
+        if (isSendable()) {
+            transitionState();
+            return strategy.makeContent(user.id() + " Push: " + user.name() + " " + content);
+        }
+        setKoState();
+        return "";
+    }
 }