start #33, test some functions

MCTG/ConsoleApp/IResearchMenuRecipe.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp
+{
+    public interface IResearchMenu<T>
+    {
+        void updateDisplay(string researchStr, T[] researchResult);
+    }
+}

MCTG/ConsoleApp/Program.cs

@@ -2,7 +2,7 @@
 
 using ConsoleApp;
 using Model;
-
+using System.Text;
 
 Console.WriteLine("Hello, World!\n\n");
 
@@ -14,8 +14,44 @@ Stub stub = new Stub();
 List<Recipe> recipes = stub.LoadRecipes();
 List<RecipeCollection> recipeCollections = stub.LoadRecipeCollection();
 
-foreach (Recipe r in recipes)
-    Console.WriteLine(r);
-
-foreach (RecipeCollection r in recipeCollections)
-    Console.WriteLine(r);
+RecipeCollection? allRecipe = recipeCollections.Find(x => x.Description.Equals("All"));
+if (allRecipe == null)
+    throw new ArgumentException("Load AllRecipe in stub: can't find 'All'.");
+
+StringBuilder sb = new StringBuilder();
+ResearchMenuRecipe researchMenu = new ResearchMenuRecipe();
+Recipe[] result = allRecipe.ResearchByName(sb.ToString());
+researchMenu.UpdateDisplay(sb.ToString(), result);
+
+ConsoleKeyInfo cki;
+
+do
+{
+    cki = Console.ReadKey(true);
+
+    switch (cki.Key)
+    {
+        case ConsoleKey.UpArrow:
+            researchMenu.SelectPrevioustLine();
+            break;
+        case ConsoleKey.DownArrow:
+            researchMenu.SelectNextLine();
+            break;
+        case ConsoleKey.Backspace:
+            if (sb.Length > 0)
+            {
+                sb.Remove(sb.Length - 1, 1);
+                result = allRecipe.ResearchByName(sb.ToString());
+            }
+            break;
+        default:
+            sb.Append(cki.KeyChar);
+            result = allRecipe.ResearchByName(sb.ToString());
+            break;
+    }
+
+    researchMenu.UpdateDisplay(sb.ToString(), result);
+
+} while (cki.Key != ConsoleKey.Enter);
+
+Console.WriteLine(researchMenu.ReturnSelected());

MCTG/ConsoleApp/ResearchMenu.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Model;
+
+namespace ConsoleApp
+{
+    internal class ResearchMenuRecipe
+    {
+        internal string displayText = "";
+        public int CurrentLine
+        {
+            get => currentLine;
+            set
+            {
+                currentLine = value;
+                if (currentLine > maxLines)
+                {
+                    currentLine = maxLines;
+                }
+                if (currentLine < 0)
+                {
+                    currentLine = 0;
+                }
+                return;
+            }
+        }
+        private int currentLine = 0;
+        private int maxLines = 0;
+        private Recipe? currentSelected;
+        
+        public void UpdateDisplay(string researchStr, Recipe[] researchResult)
+        {
+            maxLines = researchResult.Length - 1;
+
+            StringBuilder sb = new StringBuilder();
+            sb.AppendLine("---------------------------------------------------------");
+            sb.AppendLine($" Research: {researchStr}");
+            sb.AppendLine("---------------------------------------------------------");
+            for (int i = 0; i < researchResult.Length; i++)
+            {
+                if (i == CurrentLine)
+                {
+                    currentSelected = researchResult[i];
+                    sb.Append($">");
+                }
+                sb.AppendLine($" [ {researchResult[i].Id} ]: {researchResult[i].Title} ");
+            }
+            Console.Clear();
+            Console.WriteLine(sb);
+        }
+
+        public int SelectNextLine()
+        {
+            return ++CurrentLine;
+        }
+
+        public int SelectPrevioustLine()
+        {
+            return --CurrentLine;
+        }
+
+        public Recipe? ReturnSelected()
+        {
+            return currentSelected;
+        }
+    }
+}

MCTG/Model/IReasearch.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Model
+{
+    public interface IReasearch<T>
+    {
+        public T ResearchByName(string str);
+    }
+}

MCTG/Model/RecipeCollection.cs

@@ -149,6 +149,11 @@ namespace Model
             }
             return sb.ToString();
         }
+
+        public Recipe[] ResearchByName(string str)
+        {
+            return _recipes.FindAll(x => x.Title.ToLower().Contains(str.ToLower())).ToArray();
+        }
         #endregion
     }
 }