Ajout initial des fichiers de la version mysal

util/database.js

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+const { Sequelize } = require('sequelize');
+
+const Op = Sequelize.Op;
+const sequelize = new Sequelize(
+    process.env.MYSQL_DBNAME,
+    process.env.MYSQL_DBUSER,
+    process.env.MYSQL_DBPASS,
+    {
+        host: process.env.MYSQL_DBHOST,
+        port: process.env.MYSQL_DBPORT,
+        dialect: process.env.MYSQL_DBTYPE,
+        $like: Op.like,
+        $not: Op.not
+    }
+);
+
+const checkConnection = async () => {
+  try {
+    await sequelize.authenticate();
+    console.log(`DB Connected`.cyan.underline.bold);
+  } catch (error) {
+    console.error("Unable to connect to the database:".red.bold, error);
+  }
+};
+
+checkConnection();
+
+module.exports = sequelize;

util/errorResponse.js

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+class ErrorResponse extends Error {
+  constructor(message, statusCode) {
+    super(message);
+    this.statusCode = statusCode;
+  }
+}
+
+module.exports = ErrorResponse;

util/helpers.js

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+const appendTagList = (articleTags, article) => {
+  const tagList = articleTags.map((tag) => tag.name);
+
+  if (!article) return tagList;
+  delete article.dataValues.tagLists;
+  article.dataValues.tagList = tagList;
+};
+
+const appendFavorites = async (loggedUser, article) => {
+  const favorited = await article.hasUser(loggedUser ? loggedUser : null);
+  article.dataValues.favorited = loggedUser ? favorited : false;
+
+  const favoritesCount = await article.countUsers();
+  article.dataValues.favoritesCount = favoritesCount;
+};
+
+const appendFollowers = async (loggedUser, toAppend) => {
+  //
+  if (toAppend?.author) {
+    const author = await toAppend.getAuthor();
+    const following = await author.hasFollower(loggedUser ? loggedUser : null);
+    toAppend.author.dataValues.following = loggedUser ? following : false;
+
+    const followersCount = await author.countFollowers();
+    toAppend.author.dataValues.followersCount = followersCount;
+    //
+  } else {
+    const following = await toAppend.hasFollower(
+      loggedUser ? loggedUser : null
+    );
+    toAppend.dataValues.following = loggedUser ? following : false;
+
+    const followersCount = await toAppend.countFollowers();
+    toAppend.dataValues.followersCount = followersCount;
+  }
+};
+
+module.exports = { appendTagList, appendFavorites, appendFollowers };

util/jwt.js

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+const jwt = require("jsonwebtoken");
+
+module.exports.sign = async (user) => {
+  const token = await jwt.sign(
+    { id: user.id, username: user.username, email: user.email },
+    process.env.JWT_SECRET
+  );
+  return token;
+};
+
+module.exports.verify = async (token) => {
+  const decoded = await jwt.verify(token, process.env.JWT_SECRET);
+  return decoded;
+};