lib: Replace Membership with IniUserGroupBackend

library/Icinga/Authentication/Backend/IniUserGroupBackend.php

@@ -0,0 +1,65 @@
+<?php
+// {{{ICINGA_LICENSE_HEADER}}}
+// {{{ICINGA_LICENSE_HEADER}}}
+
+namespace Icinga\Authentication\Backend;
+
+use Icinga\Application\Config;
+use Icinga\Authentication\UserGroupBackend;
+use Icinga\Exception\ConfigurationError;
+use Icinga\User;
+use Icinga\Util\String;
+
+/**
+ * INI user group backend
+ */
+class IniUserGroupBackend extends UserGroupBackend
+{
+    /**
+     * Config
+     *
+     * @var Config
+     */
+    private $config;
+
+    /**
+     * Create a new INI user group backend
+     *
+     * @param Config $config
+     */
+    public function __construct(Config $config)
+    {
+        $this->config = $config;
+    }
+
+    /**
+     * (non-PHPDoc)
+     * @see UserGroupBackend::getMemberships() For the method documentation.
+     */
+    public function getMemberships(User $user)
+    {
+        $username = strtolower($user->getUsername());
+        $groups = array();
+        foreach ($this->config as $name => $section) {
+            if (empty($section->users)) {
+                throw new ConfigurationError(
+                    'Membership section \'%s\' in \'%s\' is missing the \'users\' section',
+                    $name,
+                    $this->config->getConfigFile()
+                );
+            }
+            if (empty($section->groups)) {
+                throw new ConfigurationError(
+                    'Membership section \'%s\' in \'%s\' is missing the \'groups\' section',
+                    $name,
+                    $this->config->getConfigFile()
+                );
+            }
+            $users = array_map('strtolower', String::trimSplit($section->users));
+            if (in_array($username, $users)) {
+                $groups = array_merge($groups, array_diff(String::trimSplit($section->groups), $groups));
+            }
+        }
+        return $groups;
+    }
+}