Mustache refactor (#1889)

mustache/src/main/java/com/baeldung/mustache/model/Todo.java

@@ -1,31 +1,32 @@
 package com.baeldung.mustache.model;
 
 import java.time.Duration;
-import java.time.temporal.Temporal;
 import java.util.Date;
 import java.util.function.Function;
 
 public class Todo {
 
-    public Todo(){}
-    
-    public Todo(String title, String text){
+    public Todo() {
+    }
+
+    public Todo(String title, String text) {
         this.title = title;
         this.text = text;
         createdOn = new Date();
     }
-    
+
     private String title;
     private String text;
     private boolean done = false;
-    
+
     private Date createdOn;
     private Date completedOn;
-    
-    public void markAsDone(){
+
+    public void markAsDone() {
         done = true;
         completedOn = new Date();
     }
+
     public String getTitle() {
         return title;
     }
@@ -61,24 +62,16 @@ public class Todo {
     public void setCompletedOn(Date completedOn) {
         this.completedOn = completedOn;
     }
-    
-    public long doneSince(){
-        if ( done ){
-            return Duration.between(createdOn.toInstant(), completedOn.toInstant()).toMinutes();
-        }
-        return 0;
+
+    public long doneSince() {
+        return done ? Duration
+          .between(createdOn.toInstant(), completedOn.toInstant())
+          .toMinutes() : 0;
     }
-    
-    public Function<Object, Object> handleDone(){
-        return (obj) -> {       
-            if ( done ){
-                return String.format("<small>Done %s minutes ago<small>", obj);
-            }else{
-                return "";
-            }
-            
-        };
-        
+
+    public Function<Object, Object> handleDone() {
+        return (obj) -> done ? String.format("<small>Done %s minutes ago<small>", obj) : "";
+
     }
-    
+
 }