From 26229c110fb92646b36c7b2f48ac7518fd3810a5 Mon Sep 17 00:00:00 2001
From: George Halkiadakis <gchalkiadakis@sklavenitis.co.gr>
Date: Fri, 17 Mar 2023 02:19:27 +0200
Subject: set algorithns for user authentication and authorization

---
 html/app/controllers/Auth.php | 196 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 html/app/controllers/Auth.php

(limited to 'html/app/controllers')

diff --git a/html/app/controllers/Auth.php b/html/app/controllers/Auth.php
new file mode 100644
index 0000000..c75f979
--- /dev/null
+++ b/html/app/controllers/Auth.php
@@ -0,0 +1,196 @@
+<?php
+
+namespace app\controllers;
+
+use Registry;
+use UserManager;
+use User;
+use app\models\user\User_model;
+
+
+/** class Auth
+ * 
+ * handles user's Authentication and Authorizarion
+ * 
+ */
+class Auth {
+
+    /** login
+     * 
+     * checks visitor's credentials;
+     * if valid, authenticates user
+     * 
+     */
+    public static function login()
+    {
+        $req = Registry::get('REQUEST');
+
+        // get the record of the target user
+        $record = User_model::checkUser('email', $req->POST['email']);
+       
+        // if no user exists, return false
+        if ($record === false)     return false;
+       
+        // create a user object
+        $user = (new User())
+            ->setUserName($record['email'])
+            ->setPassword($record['password'])
+            ->setRoles(json_decode($record['roles']))
+            ->setEnabled($record['active']);
+
+        // let user manager to validate user credentials
+        $userManager = new UserManager();
+        
+        if ($userManager->isPasswordValid($user, $req->POST['password'])) {
+    
+            // login OK, set Token in session
+            $userManager->createUserToken($user);
+    
+        } else {
+            return false;
+        }
+    }
+
+
+    /** register
+     * 
+     * registers new user
+     * 
+     */
+    public static function register()
+    {
+        $userManager = new UserManager();
+        $req = Registry::get('REQUEST');
+
+        // create a salted password hash
+        $password = $userManager->cryptPassword($req->POST['password']);
+        
+        $user = (new User())
+            ->setUserName($req->POST['username'])
+            ->setPassword($password)
+            ->setRoles(['ROLE_USER']);
+
+        // TODO:
+        // store user to database
+
+        $userManager->createUserToken($user);
+    }
+
+
+
+    public static function logout()
+    {
+        $userManager = new UserManager();
+        $userManager->logout();
+    }
+
+
+
+    /** isGranted( ROLE )
+     * 
+     * checks if the user is granted (some of) the specified role(s)
+     * to access the source
+     * 
+     * NOTE:
+     * if no roles are specified then user is granted
+     * (because every user is granted the 'no-role')
+     * 
+     * @param $roles (array): array of roles to check (if any is granted)
+     * 
+     */
+    public static function isGranted($roles = [])
+    {
+        // no role required ? user is granted access
+        if ($roles == [])   return true;
+
+        // else, UserManager knows if user isGranted
+        $userManager = new UserManager();
+        if ($userManager->isGranted($roles)) {
+            return true;
+
+        } else {
+            return false;
+        }
+    }
+
+
+    /** hasPermition( PERMIT )
+     * 
+     * checks if the user owns the specified permition
+     * to access the source
+     * 
+     */
+    public static function hasPermition($permit = [])
+    {
+        if ($permit == [])    return true;
+    }
+
+
+    /** isAuthenticated()
+     * 
+     * chechs if the user's roles and permitions
+     * satisfy the specified requirements 
+     * to access the source
+     * 
+     * @param $requirements (array of rules-array)
+     * 
+     * example:
+     * [
+     *    [
+     *       role => ['editor','designer']
+     *       permition => ['10', '12', '18']
+     *    ],
+     *    [
+     *       role => ['admin' , 'developερ']
+     *    ],
+     *    [
+     *       permition => [ 3 ]
+     *    ]
+     * ]
+     * 
+     * defines (and parses to) a requirements rule of:
+     * [
+     *    user should be editor or designer
+     *    and have permition 10 or 12 or 18
+     * ]
+     * OR
+     * [
+     *    user should be an administratoe or developer
+     * ]
+     * OR
+     * [
+     *    user should have permition #3
+     * ]
+     *
+     * 
+     */
+    public static function isAuthorized($requirements)
+    {
+        $authorized = false;
+        foreach($requirements as $required) {
+            if ( (self::isGranted($required['role'] ?? []))
+            && (self::hasPermition($required['permition'] ?? [])) ) {
+                $authorized = true;
+            }
+        }
+        return $authorized;
+    }
+
+
+
+
+    public static function forgot_pass()
+    {
+    }
+
+
+
+    public static function validate_otp()
+    {
+    }
+
+
+    
+}
+
+
-- 
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