initial commit

backend/Services/Auth/Adapters/JsonFile.php

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+<?php
+
+/*
+ * This file is part of the FileGator package.
+ *
+ * (c) Milos Stojanovic <alcalbg@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE file
+ */
+
+namespace Filegator\Services\Auth\Adapters;
+
+use Filegator\Services\Auth\AuthInterface;
+use Filegator\Services\Auth\User;
+use Filegator\Services\Auth\UsersCollection;
+use Filegator\Services\Service;
+use Filegator\Services\Session\SessionStorageInterface as Session;
+use Filegator\Utils\PasswordHash;
+
+class JsonFile implements Service, AuthInterface
+{
+    use PasswordHash;
+
+    const SESSION_KEY = 'json_auth';
+
+    const GUEST_USERNAME = 'guest';
+
+    protected $session;
+
+    protected $file;
+
+    public function __construct(Session $session)
+    {
+        $this->session = $session;
+    }
+
+    public function init(array $config = [])
+    {
+        if (! file_exists($config['file'])) {
+            copy($config['file'].'.blank', $config['file']);
+        }
+
+        $this->file = $config['file'];
+    }
+
+    public function user(): ?User
+    {
+        return $this->session ? $this->session->get(self::SESSION_KEY, null) : null;
+    }
+
+    public function authenticate($username, $password): bool
+    {
+        $all_users = $this->getUsers();
+
+        foreach ($all_users as &$u) {
+            if ($u['username'] == $username && $this->verifyPassword($password, $u['password'])) {
+                $user = $this->mapToUserObject($u);
+                $this->store($user);
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function forget()
+    {
+        return $this->session->invalidate();
+    }
+
+    public function store(User $user)
+    {
+        return $this->session->set(self::SESSION_KEY, $user);
+    }
+
+    public function update($username, User $user, $password = ''): User
+    {
+        $all_users = $this->getUsers();
+
+        if ($username != $user->getUsername() && $this->find($user->getUsername())) {
+            throw new \Exception('Username already taken');
+        }
+
+        foreach ($all_users as &$u) {
+            if ($u['username'] == $username) {
+                $u['username'] = $user->getUsername();
+                $u['name'] = $user->getName();
+                $u['role'] = $user->getRole();
+                $u['homedir'] = $user->getHomeDir();
+                $u['permissions'] = $user->getPermissions(true);
+
+                if ($password) {
+                    $u['password'] = $this->hashPassword($password);
+                }
+
+                $this->saveUsers($all_users);
+
+                return $this->find($user->getUsername());
+            }
+        }
+
+        throw new \Exception('User not found');
+    }
+
+    public function add(User $user, $password): User
+    {
+        if ($this->find($user->getUsername())) {
+            throw new \Exception('Username already taken');
+        }
+
+        $all_users = $this->getUsers();
+
+        $all_users[] = [
+            'username' => $user->getUsername(),
+            'name' => $user->getName(),
+            'role' => $user->getRole(),
+            'homedir' => $user->getHomeDir(),
+            'permissions' => $user->getPermissions(true),
+            'password' => $this->hashPassword($password),
+        ];
+
+        $this->saveUsers($all_users);
+
+        return $this->find($user->getUsername());
+    }
+
+    public function delete(User $user)
+    {
+        $all_users = $this->getUsers();
+
+        foreach ($all_users as $key => $u) {
+            if ($u['username'] == $user->getUsername()) {
+                unset($all_users[$key]);
+                $this->saveUsers($all_users);
+
+                return true;
+            }
+        }
+
+        throw new \Exception('User not found');
+    }
+
+    public function find($username): ?User
+    {
+        foreach ($this->getUsers() as $user) {
+            if ($user['username'] == $username) {
+                return $this->mapToUserObject($user);
+            }
+        }
+
+        return null;
+    }
+
+    public function getGuest(): User
+    {
+        $guest = $this->find(self::GUEST_USERNAME);
+
+        if (! $guest || ! $guest->isGuest()) {
+            throw new \Exception('No guest account');
+        }
+
+        return $guest;
+    }
+
+    public function allUsers(): UsersCollection
+    {
+        $users = new UsersCollection();
+
+        foreach ($this->getUsers() as $user) {
+            $users->addUser($this->mapToUserObject($user));
+        }
+
+        return $users;
+    }
+
+    protected function mapToUserObject(array $user): User
+    {
+        $new = new User();
+
+        $new->setUsername($user['username']);
+        $new->setName($user['name']);
+        $new->setRole($user['role']);
+        $new->setHomedir($user['homedir']);
+        $new->setPermissions($user['permissions'], true);
+
+        return $new;
+    }
+
+    protected function getUsers(): array
+    {
+        $users = json_decode(file_get_contents($this->file), true);
+
+        return is_array($users) ? $users : [];
+    }
+
+    protected function saveUsers(array $users)
+    {
+        return file_put_contents($this->file, json_encode($users), LOCK_EX);
+    }
+}