From d3510645cab5e26684cd7b9809dcebcf5621be25 Mon Sep 17 00:00:00 2001
From: codefairy <codefairy@hiddenmail.shell.cat>
Date: Mon, 2 Sep 2019 14:12:16 -0400
Subject: [PATCH] Add in basic groundwork for home amenities

Amenities are nodes that are placed within the home's area and offer
some kind of benefit to the area or the homeowner (while within the
area). An example would be one which expands the maximum area volume,
or one which provides healing while inside the home.
---
 amenities.lua | 35 +++++++++++++++++++++++++++++++++++
 init.lua      |  1 +
 2 files changed, 36 insertions(+)
 create mode 100644 amenities.lua

diff --git a/amenities.lua b/amenities.lua
new file mode 100644
index 0000000..e5c1075
--- /dev/null
+++ b/amenities.lua
@@ -0,0 +1,35 @@
+maggems_landmark.amenity_names = {}
+maggems_landmark.amenity_add = {}
+maggems_landmark.amenity_remove = {}
+
+function maggems_landmark.register_amenity(name, func_add, func_remove)
+  maggems_landmark.amenity_names[#maggems_landmark.amenity_names + 1] = name
+  maggems_landmark.amenity_add[name] = func_add
+  maggems_landmark.amenity_remove[name] = func_remove
+end
+
+function maggems_landmark.find_amenities(area)
+  local _, amenities = minetest.find_nodes_in_area(area.min, area.max, maggems_landmark.amenity_names)
+  for amen, count in pairs(amenities) do
+    if (count > 0) then 
+      amenities[amen] = nil
+    end
+  end
+  return amenities
+end
+
+function maggems_landmark.update_amenities(area)
+  local pos = minetest.deserialize(area.data)
+  if (minetest.get_node(pos).name ~= "maggems_landmark:home") then return false end
+  local meta = minetest.get_meta(pos)
+  local had_amenities = minetest.deserialize(meta:get("maggems_landmark:amenities"))
+  had_amenities = had_amenities or {}
+  local found_amenities = maggems_landmark.find_amenities(area)
+  for amen in pairs(found_amenities) do
+    if (had_amenities[amen] == nil) then maggems_landmark.amenity_add[amen](meta) end
+  end
+  for amen in pairs(had_amenities) do
+    if (found_amenities[amen] == nil) then maggems_landmark.amenity_remove[amen](meta) end
+  end
+  meta:set_string("maggems_landmark:amenities", minetest.serialize(found_amenities))
+end
diff --git a/init.lua b/init.lua
index bd65840..3d90a5c 100644
--- a/init.lua
+++ b/init.lua
@@ -56,4 +56,5 @@ function maggems_landmark.update_formspec(pos)
 	meta:set_string("formspec", formspec)
 end
 
+dofile(minetest.get_modpath("maggems_landmark").."/amenities.lua")
 dofile(minetest.get_modpath("maggems_landmark").."/nodes.lua")