add template files and compose file, fix syntax errors in template

Models/UserDataSet.php

@@ -0,0 +1,59 @@
+<?php
+require_once ('Database.php');
+require_once ('UserData.php');
+
+class UserDataSet {
+    protected $_dbHandle, $_dbInstance;
+
+    public function __construct() {
+        $this->_dbInstance = Database::getInstance();
+        $this->_dbHandle = $this->_dbInstance->getDbConnection();
+    }
+
+    public function fetchAll(): array
+    {
+        $sqlQuery = 'SELECT * FROM ecoUser;';
+
+        $statement = $this->_dbHandle->prepare($sqlQuery); // prepare a PDO statement
+        $statement->execute(); // execute the PDO statement
+
+        $dataSet = [];
+        // loop through and read the results of the query and cast
+        // them into a matching object
+        while ($row = $statement->fetch()) {
+            $dataSet[] = new UserData($row);
+        }
+        return $dataSet;
+    }
+
+    /**
+     * @param $username
+     * @param $password
+     * @return array
+     */
+    public function checkUserCredentials($username, $password): array
+    {
+        $sqlQuery = 'SELECT * FROM ecoUser WHERE username = ? AND password = ?;';
+        $statement = $this->_dbHandle->prepare($sqlQuery);
+        $statement->bindParam(1, $username);
+        $statement->bindParam(2, $password);
+        $statement->execute();
+        $dataSet = [];
+        while ($row = $statement->fetch()) {
+            $dataSet[] = new UserData($row);
+        }
+        return $dataSet;
+    }
+    public function fetchUser($username): array
+    {
+        $sqlQuery = 'SELECT * FROM ecoUser WHERE username = ?';
+        $statement = $this->_dbHandle->prepare($sqlQuery);
+        $statement->execute([$username]);
+        $dataSet = [];
+        while ($row = $statement->fetch()) {
+            $dataSet[] = new UserData($row);
+        }
+        return $dataSet;
+    }
+
+}