Add delete dietSession

saves/diet/unspecified 2020-10-15.json

@@ -1,10 +1,5 @@
 {
-  "foodList": [
-    {
-      "name": "ad ",
-      "calories": 4324.0
-    }
-  ],
+  "foodList": [],
   "dateInput": "10-15-2020",
   "typeInput": "unspecified",
   "date": {

saves/workout/history.json

@@ -375,5 +375,34 @@
         "nano": 511306700
       }
     }
+  },
+  {
+    "filePath": "saves/workout/workoutSession/13.json",
+    "creationTime": {
+      "date": {
+        "year": 2020,
+        "month": 10,
+        "day": 15
+      },
+      "time": {
+        "hour": 23,
+        "minute": 15,
+        "second": 59,
+        "nano": 780775900
+      }
+    },
+    "lastEditTime": {
+      "date": {
+        "year": 2020,
+        "month": 10,
+        "day": 15
+      },
+      "time": {
+        "hour": 23,
+        "minute": 15,
+        "second": 59,
+        "nano": 781404500
+      }
+    }
   }
 ]

src/main/java/diet/dietmanager/CommandLib.java

@@ -2,6 +2,7 @@
 
 import diet.dietmanager.command.Command;
 import diet.dietmanager.command.DietSessionCreate;
+import diet.dietmanager.command.DietSessionDelete;
 import diet.dietmanager.command.DietSessionList;
 import diet.dietmanager.command.DietSessionLoad;
 import diet.dietmanager.command.DietSessionWrong;
@@ -20,6 +21,7 @@ public void initDietManagerCL() {
         this.library.put("list", new DietSessionList());
         this.library.put("meal", new DietSessionCreate());
         this.library.put("load", new DietSessionLoad());
+        this.library.put("delete", new DietSessionDelete());
     }
 
     public Command get(String keyword) {

src/main/java/diet/dietmanager/command/DietSessionDelete.java

@@ -0,0 +1,26 @@
+package diet.dietmanager.command;
+
+import diet.dietsession.Food;
+import storage.diet.Storage;
+
+import java.io.File;
+
+public class DietSessionDelete implements Command {
+    static final String FILEPATH = "saves/diet/";
+
+    @Override
+    public void execute(String input, Storage storage) {
+        File folder = new File(FILEPATH);
+        File[] listOfFiles = folder.listFiles();
+        try {
+            assert !input.isEmpty();
+            int index = Integer.parseInt(input);
+            assert listOfFiles != null;
+            String fileName = listOfFiles[Integer.parseInt(input) - 1].getName();
+            System.out.println("Oh no! You have deleted " + fileName);
+            listOfFiles[Integer.parseInt(input) - 1].delete();
+        } catch (IndexOutOfBoundsException | NumberFormatException e) {
+            System.out.println("Sorry! It seems like you've entered an invalid number or input!");
+        }
+    }
+}