From 05edc193aef0fced033a3a4810f2d6ab3f980a16 Mon Sep 17 00:00:00 2001
From: printempw <h@prinzeugen.net>
Date: Sat, 10 Dec 2016 19:36:01 +0800
Subject: [PATCH] add event for rendering header & footer

---
 app/Events/RenderingFooter.php | 30 ++++++++++++++++++++++++++++++
 app/Events/RenderingHeader.php | 31 +++++++++++++++++++++++++++++++
 app/helpers.php                | 12 ++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 app/Events/RenderingFooter.php
 create mode 100644 app/Events/RenderingHeader.php

diff --git a/app/Events/RenderingFooter.php b/app/Events/RenderingFooter.php
new file mode 100644
index 00000000..43124e4d
--- /dev/null
+++ b/app/Events/RenderingFooter.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Events;
+
+class RenderingFooter extends Event
+{
+    public $contents;
+
+    /**
+     * Create a new event instance.
+     *
+     * @return void
+     */
+    public function __construct(array &$contents)
+    {
+        // pass array by reference
+        $this->contents = &$contents;
+    }
+
+    public function addContent($content)
+    {
+        if ($content) {
+            if (!is_string($content)) {
+                throw new \Exception("Can not add non-string content", 1);
+            }
+
+            $this->contents[] = $content;
+        }
+    }
+}
diff --git a/app/Events/RenderingHeader.php b/app/Events/RenderingHeader.php
new file mode 100644
index 00000000..48c42519
--- /dev/null
+++ b/app/Events/RenderingHeader.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Events;
+
+class RenderingHeader extends Event
+{
+    public $contents;
+
+    /**
+     * Create a new event instance.
+     *
+     * @return void
+     */
+    public function __construct(array &$contents)
+    {
+        // pass array by reference
+        $this->contents = &$contents;
+    }
+
+    public function addContent($content)
+    {
+        if ($content) {
+            if (!is_string($content)) {
+                throw new \Exception("Can not add non-string content", 1);
+            }
+
+            $this->contents[] = $content;
+        }
+    }
+
+}
diff --git a/app/helpers.php b/app/helpers.php
index 7f458988..42fc9f28 100644
--- a/app/helpers.php
+++ b/app/helpers.php
@@ -109,6 +109,12 @@ if (! function_exists('bs_footer')) {
         }
 
         echo '<script>'.Option::get("custom_js").'</script>';
+
+        $extra_contents = [];
+
+        Event::fire(new App\Events\RenderingFooter($extra_contents));
+
+        echo implode(PHP_EOL, $extra_contents);
     }
 }
 
@@ -130,6 +136,12 @@ if (! function_exists('bs_header')) {
         }
 
         echo '<style>'.Option::get("custom_css").'</style>';
+
+        $extra_contents = [];
+
+        Event::fire(new App\Events\RenderingHeader($extra_contents));
+
+        echo implode(PHP_EOL, $extra_contents);
     }
 }