rename to FelECS

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/felecs/stage_manager.rb b/lib/felecs/stage_manager.rb
new file mode 100644
index 0000000..b2a5b7c
--- /dev/null
+++ b/lib/felecs/stage_manager.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+module FelECS
+  module Stage
+    class << self
+      # Allows clearing of scenes and systems.
+      # Used internally by FelECS and shouldn't need to be ever used by developers
+      # @!visibility private
+      attr_writer :scenes
+
+      # Add any number of Scenes to the Stage
+      # @return [Boolean] +true+
+      def add(*scenes_to_add)
+        self.scenes |= scenes_to_add
+        self.scenes = scenes.sort_by(&:priority)
+        true
+      end
+
+      # Remove any number of Scenes from the Stage
+      # @return [Boolean] +true+
+      def remove(*scenes_to_remove)
+        self.scenes -= scenes_to_remove
+        true
+      end
+
+      # Clears all Scenes that were added to the Stage
+      # @return [Boolean] +true+
+      def clear
+        self.scenes.clear
+        true
+      end
+
+      # Executes one frame of the game. This executes all the Scenes added to the Stage in order of their priority.
+      # @return [Boolean] +true+
+      def call
+        self.scenes.each(&:call)
+        true
+      end
+
+      # Contains all the Scenes added to the Stage
+      # @return [Array<Scene>]
+      def scenes
+        @scenes ||= []
+      end
+    end
+  end
+end