From 2926250be979eb626876d5cf9fa3cb046702740a Mon Sep 17 00:00:00 2001
From: Alexander Bock <mail@alexanderbock.eu>
Date: Sat, 21 Jan 2023 21:02:02 +0100
Subject: [PATCH] Add function to return a list of all tags

---
 include/openspace/scene/scene.h |  7 +++++++
 src/scene/scene.cpp             | 10 ++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/openspace/scene/scene.h b/include/openspace/scene/scene.h
index 7a50b37c93..576282ee3d 100644
--- a/include/openspace/scene/scene.h
+++ b/include/openspace/scene/scene.h
@@ -253,6 +253,13 @@ public:
     std::vector<properties::Property*> propertiesMatchingRegex(
         std::string propertyString);
 
+    /**
+     * Returns a list of all unique tags that are used in the currently loaded scene.
+     *
+     * \return A list of all unique tags that are used in the currently loaded scene.
+     */
+    std::vector<std::string> allTags();
+
 private:
     /**
      * Accepts string version of a property value from a profile, converts it to the
diff --git a/src/scene/scene.cpp b/src/scene/scene.cpp
index 46fa8a94e2..ed8654f588 100644
--- a/src/scene/scene.cpp
+++ b/src/scene/scene.cpp
@@ -754,6 +754,16 @@ std::vector<properties::Property*> Scene::propertiesMatchingRegex(
     return findMatchesInAllProperties(propertyString, allProperties(), "");
 }
 
+std::vector<std::string> Scene::allTags() {
+    std::set<std::string> result;
+    for (SceneGraphNode* node : _topologicallySortedNodes) {
+        const std::vector<std::string>& tags = node->tags();
+        result.insert(tags.begin(), tags.end());
+    }
+
+    return std::vector<std::string>(result.begin(), result.end());
+}
+
 scripting::LuaLibrary Scene::luaLibrary() {
     return {
         "",