From cf14306c2b3f82a81f8d56669a71633b4d4b5fce Mon Sep 17 00:00:00 2001
From: marvin-borner@live.com
Date: Mon, 16 Apr 2018 21:09:05 +0200
Subject: Main merge to user management system - files are now at /main/public/

---
 .../account/src/Authorize/AuthorizationManager.php | 157 +++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100755 main/app/sprinkles/account/src/Authorize/AuthorizationManager.php

(limited to 'main/app/sprinkles/account/src/Authorize/AuthorizationManager.php')

diff --git a/main/app/sprinkles/account/src/Authorize/AuthorizationManager.php b/main/app/sprinkles/account/src/Authorize/AuthorizationManager.php
new file mode 100755
index 0000000..def152b
--- /dev/null
+++ b/main/app/sprinkles/account/src/Authorize/AuthorizationManager.php
@@ -0,0 +1,157 @@
+<?php
+/**
+ * UserFrosting (http://www.userfrosting.com)
+ *
+ * @link      https://github.com/userfrosting/UserFrosting
+ * @license   https://github.com/userfrosting/UserFrosting/blob/master/licenses/UserFrosting.md (MIT License)
+ */
+namespace UserFrosting\Sprinkle\Account\Authorize;
+
+use Interop\Container\ContainerInterface;
+use UserFrosting\Sprinkle\Account\Database\Models\User;
+
+/**
+ * AuthorizationManager class.
+ *
+ * Manages a collection of access condition callbacks, and uses them to perform access control checks on user objects.
+ * @author Alex Weissman (https://alexanderweissman.com)
+ */
+class AuthorizationManager
+{
+    /**
+     * @var ContainerInterface The global container object, which holds all your services.
+     */
+    protected $ci;
+
+    /**
+     * @var array[callable] An array of callbacks that accept some parameters and evaluate to true or false.
+     */
+    protected $callbacks = [];
+
+    /**
+     * Create a new AuthorizationManager object.
+     *
+     * @param ContainerInterface $ci The global container object, which holds all your services.
+     */
+    public function __construct(ContainerInterface $ci, array $callbacks = [])
+    {
+        $this->ci = $ci;
+        $this->callbacks = $callbacks;
+    }
+
+    /**
+     * Register an authorization callback, which can then be used in permission conditions.
+     *
+     * To add additional callbacks, simply extend the `authorizer` service in your Sprinkle's service provider.
+     * @param string $name
+     * @param callable $callback
+     */
+    public function addCallback($name, $callback)
+    {
+        $this->callbacks[$name] = $callback;
+        return $this;
+    }
+
+    /**
+     * Get all authorization callbacks.
+     *
+     * @return callable[]
+     */
+    public function getCallbacks()
+    {
+        return $this->callbacks;
+    }
+
+    /**
+     * Checks whether or not a user has access on a particular permission slug.
+     *
+     * Determine if this user has access to the given $slug under the given $params.
+     *
+     * @param UserFrosting\Sprinkle\Account\Database\Models\User $user
+     * @param string $slug The permission slug to check for access.
+     * @param array $params[optional] An array of field names => values, specifying any additional data to provide the authorization module
+     * when determining whether or not this user has access.
+     * @return boolean True if the user has access, false otherwise.
+     */
+    public function checkAccess(User $user, $slug, array $params = [])
+    {
+        $debug = $this->ci->config['debug.auth'];
+
+        if ($debug) {
+            $trace = array_slice(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3), 1);
+            $this->ci->authLogger->debug("Authorization check requested at: ", $trace);
+            $this->ci->authLogger->debug("Checking authorization for user {$user->id} ('{$user->user_name}') on permission '$slug'...");
+        }
+
+        if ($this->ci->authenticator->guest()) {
+            if ($debug) {
+                $this->ci->authLogger->debug("User is not logged in.  Access denied.");
+            }
+            return false;
+        }
+
+        // The master (root) account has access to everything.
+        // Need to use loose comparison for now, because some DBs return `id` as a string.
+
+        if ($user->id == $this->ci->config['reserved_user_ids.master']) {
+            if ($debug) {
+                $this->ci->authLogger->debug("User is the master (root) user.  Access granted.");
+            }
+            return true;
+        }
+
+        // Find all permissions that apply to this user (via roles), and check if any evaluate to true.
+        $permissions = $user->getCachedPermissions();
+
+        if (empty($permissions) || !isset($permissions[$slug])) {
+            if ($debug) {
+                $this->ci->authLogger->debug("No matching permissions found.  Access denied.");
+            }
+            return false;
+        }
+
+        $permissions = $permissions[$slug];
+
+        if ($debug) {
+            $this->ci->authLogger->debug("Found matching permissions: \n" . print_r($this->getPermissionsArrayDebugInfo($permissions), true));
+        }
+
+        $nodeVisitor = new ParserNodeFunctionEvaluator($this->callbacks, $this->ci->authLogger, $debug);
+        $ace = new AccessConditionExpression($nodeVisitor, $user, $this->ci->authLogger, $debug);
+
+        foreach ($permissions as $permission) {
+            $pass = $ace->evaluateCondition($permission->conditions, $params);
+            if ($pass) {
+                if ($debug) {
+                    $this->ci->authLogger->debug("User passed conditions '{$permission->conditions}' .  Access granted.");
+                }
+                return true;
+            }
+        }
+
+        if ($debug) {
+            $this->ci->authLogger->debug("User failed to pass any of the matched permissions.  Access denied.");
+        }
+
+        return false;
+    }
+
+    /**
+     * Remove extraneous information from the permission to reduce verbosity.
+     *
+     * @param  array
+     * @return array
+     */
+    protected function getPermissionsArrayDebugInfo($permissions)
+    {
+        $permissionsInfo = [];
+        foreach ($permissions as $permission) {
+            $permissionData = array_only($permission->toArray(), ['id', 'slug', 'name', 'conditions', 'description']);
+            // Remove this until we can find an efficient way to only load these once during debugging
+            //$permissionData['roles_via'] = $permission->roles_via->pluck('id')->all();
+            $permissionsInfo[] = $permissionData;
+        }
+
+        return $permissionsInfo;
+    }
+}
-- 
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