From 89ce453d0d65c7513e4aa1b429d4f90a1c6d35d0 Mon Sep 17 00:00:00 2001
From: keboeoris <kevin.bossar@eoris.fr>
Date: Tue, 2 Jul 2024 07:54:35 +0200
Subject: [PATCH] New hook to add custom header tags (#17263)

---
 src/Html.php                          | 13 +++++++++++++
 src/Plugin/Hooks.php                  |  2 ++
 templates/layout/parts/head.html.twig |  5 +++++
 3 files changed, 20 insertions(+)

diff --git a/src/Html.php b/src/Html.php
index 579fbf60a47..5238249f7fb 100644
--- a/src/Html.php
+++ b/src/Html.php
@@ -1304,6 +1304,19 @@ public static function includeHeader(
         }
         $tpl_vars['css_files'][] = ['path' => 'css/palettes/' . $theme . '.scss'];
 
+        // Add specific meta tags for plugins
+        $custom_header_tags = [];
+        if (isset($PLUGIN_HOOKS[Hooks::ADD_HEADER_TAG]) && count($PLUGIN_HOOKS[Hooks::ADD_HEADER_TAG])) {
+            foreach ($PLUGIN_HOOKS[Hooks::ADD_HEADER_TAG] as $plugin => $plugin_header_tags) {
+                if (!Plugin::isPluginActive($plugin)) {
+                    continue;
+                }
+                array_push($custom_header_tags, ...$plugin_header_tags);
+            }
+        }
+        $tpl_vars['custom_header_tags'] = $custom_header_tags;
+
+
         $tpl_vars['js_files'][] = ['path' => 'public/lib/base.js'];
         $tpl_vars['js_files'][] = ['path' => 'js/webkit_fix.js'];
         $tpl_vars['js_files'][] = ['path' => 'js/common.js'];
diff --git a/src/Plugin/Hooks.php b/src/Plugin/Hooks.php
index d7a2258659f..30f8c55d467 100644
--- a/src/Plugin/Hooks.php
+++ b/src/Plugin/Hooks.php
@@ -43,6 +43,7 @@ class Hooks
    // File hooks
     const ADD_CSS        = 'add_css';
     const ADD_JAVASCRIPT = 'add_javascript';
+    const ADD_HEADER_TAG = 'add_header_tag';
 
    // Function hooks with no parameters
     const CHANGE_ENTITY               = 'change_entity';
@@ -185,6 +186,7 @@ public static function getFunctionalHooks(): array
             self::UNDISCLOSED_CONFIG_VALUE,
             self::UNLOCK_FIELDS,
             self::VCARD_DATA,
+            self::ADD_HEADER_TAG
         ];
     }
 
diff --git a/templates/layout/parts/head.html.twig b/templates/layout/parts/head.html.twig
index 11a273ba287..1f37cf0180b 100644
--- a/templates/layout/parts/head.html.twig
+++ b/templates/layout/parts/head.html.twig
@@ -48,6 +48,11 @@
    {# prevent robots to index GLPI instances #}
    <meta name="robots" content="noindex, nofollow" />
 
+    {# Custom header tags for plugins #}
+    {% for header_tag in custom_header_tags %}
+        <{{ header_tag.tag }} {% for key, value in header_tag.properties %}{{ key }}="{{ value }}" {% endfor %}/>
+    {% endfor %}
+
    <meta property="glpi:csrf_token" content="{{ csrf_token(true) }}" />
 
    {% for css_file in css_files %}