use 'Connexion' class instead of storing prepared statements

public/index.php

@@ -4,6 +4,7 @@ require "../vendor/autoload.php";
 require "../config.php";
 require "../sql/database.php";
 
+use App\Connexion;
 use App\Controller\SampleFormController;
 use App\Gateway\FormResultGateway;
 
@@ -23,7 +24,7 @@ function get_base_path() {
 }
 
 $basePath = get_base_path();
-$pdo = get_database();
+$pdo = new Connexion(get_database());
 
 // routes initialization
 $router = new AltoRouter();

src/Connexion.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App;
+use \PDO;
+
+class Connexion {
+
+    private PDO $pdo;
+
+    /**
+     * @param PDO $pdo
+     */
+    public function __construct(PDO $pdo)
+    {
+        $this->pdo = $pdo;
+    }
+
+    public function exec(string $query, array $args) {
+        $stmnt = $this->pdo->prepare($query);
+        foreach ($args as $name => $value) {
+            $stmnt->bindValue($name, $value[0], $value[1]);
+        }
+        $stmnt->execute();
+    }
+
+    public function fetch(string $query, array $args): array {
+        $stmnt = $this->pdo->prepare($query);
+        foreach ($args as $name => $value) {
+            $stmnt->bindValue($name, $value[0], $value[1]);
+        }
+        $stmnt->execute();
+        return $stmnt->fetchAll();
+    }
+
+}

src/Gateway/FormResultGateway.php

@@ -3,32 +3,31 @@
 namespace App\Gateway;
 
 use PDO;
-use PDOStatement;
+use App\Connexion;
 
 /**
  * A sample gateway, that stores the sample form's result.
  */
 class FormResultGateway {
 
-    private PDOStatement $insertion_stmnt;
-    private PDOStatement $list_stmnt;
+    private Connexion $con;
 
-    public function __construct(PDO $pdo)
-    {
-        $this->insertion_stmnt = $pdo->prepare("INSERT INTO FormEntries VALUES (:name, :description)");
-        $this->list_stmnt = $pdo->prepare("SELECT * FROM FormEntries");
+    public function __construct(Connexion $con) {
+        $this->con = $con;
     }
 
 
     function insert(string $username, string $description) {
-        $this->insertion_stmnt->bindValue(":name", $username, PDO::PARAM_STR);
-        $this->insertion_stmnt->bindValue(":description", $description, PDO::PARAM_STR);
-
-        $this->insertion_stmnt->execute();
+        $this->con->exec(
+            "INSERT INTO FormEntries VALUES (:name, :description)",
+            [
+                ":name" => [$username, PDO::PARAM_STR],
+                "description" => [$description, PDO::PARAM_STR]
+            ]
+        );
     }
 
     function listResults(): array {
-        $this->list_stmnt->execute();
-        return $this->list_stmnt->fetchAll();
+        return $this->con->fetch("SELECT * FROM FormEntries", []);
     }
 }