gem conversion

1 files changed, 58 insertions, 0 deletions

diff --git a/lib/felflame/scene_manager.rb b/lib/felflame/scene_manager.rb
new file mode 100644
index 0000000..315dd55
--- /dev/null
+++ b/lib/felflame/scene_manager.rb
@@ -0,0 +1,58 @@
+class FelFlame
+  class Scenes
+    # The Constant name assigned to this Scene
+    attr_reader :const_name
+
+    # Allows overwriting the storage of systems, such as for clearing.
+    # This method should generally only need to be used internally and
+    # not by a game developer/
+    # @!visibility private
+    attr_writer :systems
+
+    # Create a new Scene using the name given
+    # @param name [String] String format must follow requirements of a constant
+    def initialize(name)
+      FelFlame::Scenes.const_set(name, self)
+      @const_name = name
+    end
+
+    # The list of Systems this Scene contains
+    # @return [Array<System>]
+    def systems
+      @systems ||= []
+    end
+
+    # Execute all systems in this Scene, in the order of their priority
+    # @return [Boolean] +true+
+    def call
+      systems.each(&:call)
+      true
+    end
+
+    # Adds any number of Systems to this Scene
+    # @return [Boolean] +true+
+    def add(*systems_to_add)
+      self.systems |= systems_to_add
+      systems.sort_by!(&:priority)
+      FelFlame::Stage.update_systems_list if FelFlame::Stage.scenes.include? self
+      true
+    end
+
+    # Removes any number of SystemS from this Scene
+    # @return [Boolean] +true+
+    def remove(*systems_to_remove)
+      self.systems -= systems_to_remove
+      systems.sort_by!(&:priority)
+      FelFlame::Stage.update_systems_list if FelFlame::Stage.scenes.include? self
+      true
+    end
+
+    # Removes all Systems from this Scene
+    # @return [Boolean] +true+
+    def clear
+      systems.clear
+      FelFlame::Stage.update_systems_list if FelFlame::Stage.scenes.include? self
+      true
+    end
+  end
+end