add some functions to simplify the access of data

MCTG/ConsoleApp/Program.cs

@@ -23,9 +23,11 @@ dataMgr.Serializer = new DataContractXML();
 //dataMgr.Import<Recipe>("C:\\Users\\alex6\\Downloads\\recipe2.json");
 
 PasswordManager passwordManager = new PasswordManager();
-RecipeCollection rc = new RecipeCollection("All recipes", dataMgr.Data[nameof(Recipe)].Cast<Recipe>().ToArray());
+//RecipeCollection rc = new RecipeCollection("All recipes", dataMgr.Data[nameof(Recipe)].Cast<Recipe>().ToArray());
+RecipeCollection rc = dataMgr.GetRecipes("All recipes");
+//RecipeCollection rc = new RecipeCollection("All recipes", dataMgr.GetFromData<Recipe>().ToArray());
 
-User user = dataMgr.Data[nameof(User)].Cast<User>().Last();
+User user = dataMgr.GetUsers().Last();
 
 //rc[0].AddReview(new Review(user, 1, "bonne recette !1"));
 //rc[0].AddReview(new Review(user, 1, "bonne recette !2"));

MCTG/Model/Managers/DataManager.cs

@@ -76,6 +76,30 @@ namespace Model
         public void Export<T>(T obj, string pathToExport)
             where T : class
             => Serializer.Export<T>(obj, pathToExport);
+
+        /// <summary>
+        /// Get all the recipe from the data.
+        /// </summary>
+        /// <param name="rcTitle">The title to give for the Recipe Collection</param>
+        /// <returns>A RecipeCollection that contain all the recipe in the data.</returns>
+        public RecipeCollection GetRecipes(string rcTitle = "default")
+            => new RecipeCollection(rcTitle, Data[nameof(Recipe)].Cast<Recipe>().ToArray());
+
+        /// <summary>
+        /// Get all the Users from the data.
+        /// </summary>
+        /// <returns>A list of all Users.</returns>
+        public List<User> GetUsers()
+            => new List<User>(Data[nameof(User)].Cast<User>());
+
+        /// <summary>
+        /// Get a list of an item in the data.
+        /// </summary>
+        /// <typeparam name="T">The type of the item</typeparam>
+        /// <returns>The list of all the item found in the data.</returns>
+        public ICollection<T> GetFromData<T>() where T : class
+            => new List<T>(Data[typeof(T).Name].Cast<T>());
+
         #endregion
     }
 }