Admin subsystem skeleton

This is the first release of the administration module to support
administrative functions.
Changed main layout to add admin navigation.
Added /admin route for "admin home"

config/app.config.php

@@ -29,6 +29,7 @@ return [
         'module/university_form/bootstrap.php',
         'module/teacher_form/bootstrap.php',
         'module/enable_db_login/bootstrap.php',
+        'module/admin/bootstrap.php',
     ],
     'cache_config' => 'data/cache/config/settings.php',
 ];

config/settings/nav.global.php

@@ -79,5 +79,11 @@ return [
             ],
 
         ],
+        'admin' => [
+            'adminhome' => [
+                'label' => 'Αρχική σελίδα διαχειριστή',
+                'route' => 'admin',
+            ],
+        ]
     ],
 ];

module/admin/README.md

+# Υποσύστημα διαχειριστή
+
+Παρέχει πρόσβαση σε διαχειριστικές λειτουργίες. Εφόσον ο χρήστης πιστοποιείται 
+με ρόλο admin εμφανίζεται το μενού διαχειριστικών λειτουργιών. 
+
+## Routes
+
+Διαθέσιμα routes (paths) και λειτουργίες.
+
+- admin (/admin): αρχική σελίδα διαχειριστή
+
+## Οδηγίες 
+
+Για να είναι προσβάσιμο, πρέπει:
+
+- να προσθέσετε την παρακάτω γραμμή στο `acl.global.php` ή `acl.local.php`, 
+στο acl.guards.routes
+```
+    ['/admin', ['admin'], ['get']],
+```

module/admin/bootstrap.php

+<?php
+
+use Slim\App;
+use Slim\Container;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * gredu_labs.
+ *
+ * @link https://github.com/eellak/gredu_labs for the canonical source repository
+ *
+ * @copyright Copyright (c) 2008-2015 Greek Free/Open Source Software Society (https://gfoss.ellak.gr/)
+ * @license GNU GPLv3 http://www.gnu.org/licenses/gpl-3.0-standalone.html
+ */
+return function (App $app) {
+    $container = $app->getContainer();
+    $events = $container['events'];
+
+    $events('on', 'app.autoload', function ($autoloader) {
+        $autoloader->addPsr4('GrEduLabs\\Admin\\', __DIR__ . '/src/');
+    });
+
+    $events('on', 'app.services', function (Container $container) {
+//        $nav = $container['settings']->get('navigation');
+//        $nav['admin'] = [
+//            'adminhome' => [
+//                'label' => 'Διαχειριστής',
+//                'route' => 'admin',
+//                'icon' => 'user-secret',
+//            ],
+//        ];
+//        $container['settings']->set('navigation', $nav);
+
+        $container[GrEduLabs\Admin\Action\Index::class] = function ($c) {
+            return new GrEduLabs\Admin\Action\Index($c['view']);
+        };
+    });
+
+    $events('on', 'app.bootstrap', function (App $app, Container $c) {
+        $view = $c->get('view');
+        $view->getEnvironment()->getLoader()->prependPath(__DIR__ . '/templates');
+        $app->get('/admin', GrEduLabs\Admin\Action\Index::class)
+                ->setName('admin');
+    });
+};

module/admin/src/Action/Index.php

+<?php
+
+/**
+ * gredu_labs.
+ *
+ * @link https://github.com/eellak/gredu_labs for the canonical source repository
+ *
+ * @copyright Copyright (c) 2008-2015 Greek Free/Open Source Software Society (https://gfoss.ellak.gr/)
+ * @license GNU GPLv3 http://www.gnu.org/licenses/gpl-3.0-standalone.html
+ */
+
+namespace GrEduLabs\Admin\Action;
+
+use Slim\Http\Request;
+use Slim\Http\Response;
+use Slim\Views\Twig;
+
+class Index {
+
+    /**
+     * @var Twig
+     */
+    protected $view;
+
+    /**
+     * Constructor.
+     *
+     * @param Twig $view
+     */
+    public function __construct(Twig $view) {
+        $this->view = $view;
+    }
+
+    public function __invoke(Request $req, Response $res) {
+        return $this->view->render($res, 'admin/index.twig');
+    }
+
+}

module/admin/templates/admin/index.twig

+{% extends "layout.twig" %}
+
+{% block content %}
+    <div id="adminarea">
+        <div class="panel panel-default">
+            <div class="panel-heading">
+                <h4>Σελίδα διαχειριστή</h4>
+            </div>
+            <div class="panel-body">
+                <p>Διαθέσιμες διαχειριστικές λειτουργίες</p>
+            </div>
+            <div class="panel-footer text-center">
+                <a class="btn btn-sm btn-default" href="{{ path_for('index') }}"><span class="fa fa-home"></span> Αρχική</a>
+                <a class="btn btn-sm btn-primary" href="{{ path_for('admin') }}"><span class="fa fa-user-secret"></span> Διαχειριστής</a>
+                <a class="btn btn-sm btn-default" href="{{ path_for('user.logout') }}"><span class="fa fa-lock"></span> Αποσύνδεση</a>
+            </div>
+        </div>
+    </div>
+{% endblock %}

module/application/templates/navigation/main.twig

 {% macro li(page) %}
-    
+
     <li role="presentation" class="{% if page.active %}active {% endif %}{{ page.class|default('') }}">
         <a href="{{ page.href }}" {% if page.id %}id="{{ page.id }}"{% endif %} title="{{ page.label|striptags|e }}"
            {% if page.target %}target="{{ page.target }}"{% endif %}>
@@ -24,14 +24,24 @@
         </div>
         <div id="navbar" class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
-            {% for page in nav('main') %}
-                {{ macros.li(page)}}
-            {% endfor %}
+                {% for page in nav('main') %}
+                    {{ macros.li(page)}}
+                {% endfor %}
+                {% if not nav('admin') is empty %}
+                    <li class="dropdown">
+                        <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"><span class="fa fa-user-secret"></span> Διαχειριστής <span class="caret"></span></a>
+                        <ul class="dropdown-menu">
+                            {% for page in nav('admin') %}
+                                {{ macros.li(page)}}
+                            {% endfor %}
+                        </ul>
+                    </li>
+                {% endif %}
             </ul>
             <ul class="nav navbar-nav navbar-right">
-            {% for page in nav('authentication') %}
-                {{ macros.li(page)}}
-            {% endfor %}
+                {% for page in nav('authentication') %}
+                    {{ macros.li(page)}}
+                {% endfor %}
             </ul>
         </div>
     </div>