Add new views and styles for music application

- Created new CSS files for styling the application, including home.css and style.css.
- Implemented 403 and 404 error views with appropriate messages and navigation.
- Developed a dump view to display deleted elements with restoration options.
- Enhanced home view to include music search functionality and display results.
- Added listplay view for managing music playlists, including creation and deletion options.
- Implemented loadmusic view for uploading new music with necessary fields.
- Created login and register views for user authentication.
- Developed sound view to display individual music tracks with playback controls and options for liking and deleting.
- Updated menu view to include navigation links based on user authentication status.

controller/user/Session.controller.php

@@ -0,0 +1,26 @@
+<?php
+
+session_start();
+
+class Session{
+    public static function Auth(){
+        return isset($_SESSION['LOGIN'])?$_SESSION['LOGIN']:false;
+    }
+
+    public static function Admin(){
+        return isset($_SESSION['privileges'])?$_SESSION['privileges']:false;
+    }
+
+    public static function getUsername(){
+        return isset($_SESSION['username'])?$_SESSION['username']:null;
+    }
+    
+    public static function getUserID(){
+        return isset($_SESSION['idUser'])?$_SESSION['idUser']:0;
+    }
+
+    public static function logout(){
+        unset($_SESSION);
+        session_destroy();
+    }
+}

controller/user/User.controller.php

@@ -0,0 +1,47 @@
+<?php
+
+class User extends Connection{
+    private $table = 'user';
+
+    public function __construct()
+    {
+        if(!parent::tableExists($this->table)){
+            parent::execNoQuery("CREATE TABLE $this->table(
+                idUser INTEGER(10) PRIMARY KEY AUTO_INCREMENT, 
+                username VARCHAR(50) NOT NULL, userpassword VARCHAR(50) NOT NULL, 
+                privileges BOOLEAN DEFAULT FALSE,  date TIMESTAMP DEFAULT NOW(), 
+                deleteUser BOOLEAN DEFAULT FALSE
+            )");
+        }
+    }
+
+    public function isAccess(array $login){
+        $data = parent::getData("SELECT * FROM $this->table 
+            WHERE username='{$login['username']}' 
+            AND userpassword=MD5('{$login['password']}') 
+            AND NOT deleteUser"
+        );
+
+        if(count($data) == 1){
+            $_SESSION = $data[0];
+            $_SESSION['LOGIN'] = true;
+        }
+        return count($data) == 1;
+    }
+
+    public function newUser(array $register){
+        parent::execNoQuery("INSERT INTO $this->table(username,userpassword) VALUE('{$register['username']}', MD5('{$register['password']}'))");
+    }
+
+    public function exists(string $username){
+        return count(parent::getData("SELECT * FROM $this->table WHERE username='$username'")) > 0;
+    }
+
+    public function getUsers(){
+        return parent::getData("SELECT * FROM $this->table WHERE NOT deleteUser");
+    }
+
+    public function getUser(int $idUser){
+        return parent::getData("SELECT * FROM $this->table WHERE NOT deleteUser AND idUser = $idUser")[0];
+    }
+}