Plugin system: allow plugins to provide custom routes

  - each route will be prefixed by `/plugin/<plugin_name>`
  - add a new template for plugins rendering
  - add a live example in the demo_plugin

Check out the "Plugin System" documentation for more detail.

Related to #143

1 files changed, 24 insertions, 0 deletions

diff --git a/plugins/demo_plugin/DemoPluginController.php b/plugins/demo_plugin/DemoPluginController.php
new file mode 100644
index 00000000..b8ace9c8
--- /dev/null
+++ b/plugins/demo_plugin/DemoPluginController.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\DemoPlugin;
+
+use Shaarli\Front\Controller\Admin\ShaarliAdminController;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+class DemoPluginController extends ShaarliAdminController
+{
+    public function index(Request $request, Response $response): Response
+    {
+        $this->assignView(
+            'content',
+            '<div class="center">' .
+                'This is a demo page. I have access to Shaarli container, so I\'m free to do whatever I want here.' .
+            '</div>'
+        );
+
+        return $response->write($this->render('pluginscontent'));
+    }
+}