From 4979289ea6ce7b1342fb76564db33c63f5dcae4e Mon Sep 17 00:00:00 2001
From: Alexander Weber <web.alexander@web.de>
Date: Mon, 14 Jan 2019 20:27:52 +0100
Subject: [PATCH] initial version

---
 depends.txt |  2 ++
 init.lua    | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 depends.txt
 create mode 100644 init.lua

diff --git a/depends.txt b/depends.txt
new file mode 100644
index 0000000..27d7bf4
--- /dev/null
+++ b/depends.txt
@@ -0,0 +1,2 @@
+craftguide
+doc_items
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..e12be86
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,51 @@
+local reg_items = minetest.registered_items
+
+local function item_has_groups(item_groups, groups)
+	for i = 1, #groups do
+		local group = groups[i]
+		if not item_groups[group] then
+			return
+		end
+	end
+	return true
+end
+
+local function revealed_show_recipe(recipe, playername)
+	local revealed = doc.data.players[playername].stored_data.revealed
+	for _, item in pairs(recipe.items) do
+		local is_revealed_item
+		if item:sub(1,6) == "group:" then
+			local groups = item:sub(7):split(",")
+			for cid, items in pairs(revealed) do
+				for item in pairs(items) do
+					if item_has_groups(reg_items[item].groups, groups) then
+						is_revealed_item = true
+					end
+				end
+			end
+		else
+			for cid, items in pairs(revealed) do
+				if items[item] then
+					is_revealed_item = true
+				end
+			end
+		end
+
+		if not is_revealed_item then
+			return
+		end
+	end
+	return true
+end
+
+
+function craftguide.progressive_filter_recipes(recipes, player)
+	local filtered = {}
+	for i = 1, #recipes do
+		local recipe = recipes[i]
+		if revealed_show_recipe(recipe, player:get_player_name()) then
+			filtered[#filtered + 1] = recipe
+		end
+	end
+	return filtered
+end