Part on Refactoring Section3 finished

Database.php

@@ -2,6 +2,7 @@
 // connect to MySQL database.
 class Database {
     public $connection;
+    public $statement;
 
     public function __construct($config, $username, $password)
     {
@@ -9,8 +10,23 @@ class Database {
         $this->connection  = new PDO($dsn, $username, $password, [PDO::ATTR_DEFAULT_FETCH_MODE=> PDO::FETCH_ASSOC]);
     }
     public function query($query, $params = []) {
-        $statement = $this->connection->prepare($query);
-        $statement->execute($params);
-        return $statement;
+        $this->statement = $this->connection->prepare($query);
+        $this->statement->execute($params);
+        return $this;
+    }
+    public function find() {
+        return $this->statement->fetch();
+    }
+    public function findOrFail() {
+        $result = $this->find();
+        if (! $result) {
+            abort();
+        }
+
+        return $result;
+    }
+
+    public function get() {
+        return $this->statement->fetchAll();
     }
 }