Add V3 api Export

This is an experimental feature

classes/postHandler.php

     private $dao;
     private $uploadBaseDir = '../uploaded_images/';
     private $stockFile = "../data/stock-v2.json";
+    private $stockFileV3 = "../data/stock-v3.json";
     private $imageBaseUrl = "https://etud.insa-toulouse.fr/~proximo/uploaded_images/";
 
     private $responseArray = array(
     public function write_json()
     {
         $result = 0;
+        // V2
         $fp = fopen($this->stockFile, "w");
         $array = array(
             "types" => $this->dao->get_categories(),
         );
         fwrite($fp, json_encode($array));
         fclose($fp);
+        // V3
+        $fp = fopen($this->stockFileV3, "w");
+        $array = array(
+            "types" => $this->dao->get_categories(),
+            "articles" => $this->get_articles_json_list_V3(),
+        );
+        fwrite($fp, json_encode($array));
+        fclose($fp);
 
         $this->responseArray["data"] = $result;
         return $this->responseArray;
         return $formatted_articles;
     }
 
+    public function get_articles_json_list_V3()
+    {
+        $articles = $this->dao->get_articles();
+        $formatted_articles = [];
+        foreach ($articles as $article) {
+            $article["type"] = $this->dao->get_categories_of_article($article["id"]);
+            $article["image"] = $this->imageBaseUrl . $article["id"] . ".jpg";
+            array_push($formatted_articles, $article);
+        }
+
+        return $formatted_articles;
+    }
+
     private function save_image()
     {
         $success = true;