add snooze extension

data/duke.txt

@@ -1,7 +1,7 @@
 T|✘|buy bread
 T|✘|go school
 E|✘|dating|2020-09-08
-D|✘|sad|2023-09-08
+D|✘|sad|2020-07-09
 T|✘|buy book
 D|✘|return nook|2020-09-08
 D|✘|return book|2020-07-09

src/main/java/Deadline.java

@@ -6,7 +6,7 @@
 import java.time.format.DateTimeFormatter;
 public class Deadline extends Task{
 
-    protected LocalDate by;
+    public LocalDate by;
 
     /**
      * Deadline constructor

src/main/java/Parser.java

@@ -60,6 +60,14 @@ public static Command parse(String input) throws DukeException{
         case "bye":
             command = new ExitCommand();
             break;
+        case "snooze":
+            if(input.length() == 6){
+                throw new DukeException("☹ OOPS!!! You cannot leave descriptions of a snooze empty");
+            } else {
+                taskIndex = Integer.parseInt(commandline[1]);
+                command = new SnoozeCommand(taskIndex, LocalDate.parse(commandline[2]));
+            }
+            break;
 
         default:
             throw new DukeException("☹ OOPS!!! I'm sorry, but I don't know what that means :-(");

src/main/java/SnoozeCommand.java

@@ -0,0 +1,24 @@
+import java.time.LocalDate;
+
+public class SnoozeCommand extends Command{
+
+    public int taskIndex;
+    public LocalDate newDate;
+
+    public SnoozeCommand(int taskIndex, LocalDate newDate){
+        super();
+        this.taskIndex = taskIndex;
+        this.newDate = newDate;
+    }
+
+    /**
+     * Execute the command
+     * @param inputTasks the list of tasks used
+     * @param storage the storage used
+     */
+    public void execute(TaskList inputTasks, Storage storage, Ui ui){
+        assert taskIndex > 0;
+        inputTasks.snooze(taskIndex, newDate, ui);
+        storage.writeToFile(inputTasks);
+    }
+}

src/main/java/TaskList.java

@@ -1,4 +1,6 @@
+import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
+import java.time.LocalDate;
 public class TaskList {
     public ArrayList<Task> tasks;
 
@@ -86,4 +88,20 @@ public void findKeyword(String keyword, Ui ui){
             ui.addResponse(listNum.toString() + "." + keyTasks.get(i).toString());
         }
     }
+
+    public void snooze(int taskIndex, LocalDate newDate, Ui ui){
+        if(tasks.get(taskIndex - 1) instanceof Deadline){
+            Deadline editedTask = new Deadline(tasks.get(taskIndex - 1).description, newDate);
+            tasks.set(taskIndex - 1, editedTask);
+            ui.addResponse("Okay! You have snoozed task " + taskIndex + " to " +
+                    newDate.format(DateTimeFormatter.ofPattern("MMM dd yyyy")));
+        }else if(tasks.get(taskIndex - 1) instanceof Event){
+            Event editedTask = new Event(tasks.get(taskIndex - 1).description, newDate);
+            tasks.set(taskIndex - 1, editedTask);
+            ui.addResponse("Okay! You have snoozed task " + taskIndex + " to " +
+                    newDate.format(DateTimeFormatter.ofPattern("MMM dd yyyy")));
+        }else{
+            ui.addResponse("This task do not need to be snoozed");
+        }
+    }
 }