quick and dirty locking and unlocking via cairns

collectible_lore/init.lua

@@ -1,8 +1,28 @@
 local modpath = minetest.get_modpath(minetest.get_current_modname())
 local S = minetest.get_translator(minetest.get_current_modname())
+local modmeta =  minetest.get_mod_storage()
 
 collectible_lore = {}
 
+collectible_lore.get_player_unlocks = function(player_name)
+	local unlocks_string = modmeta:get("player_" .. player_name)
+	if unlocks_string == nil then
+		return {}
+	else
+		return minetest.deserialize(unlocks_string)
+	end
+end
+
+local set_player_unlocks = function(player_name, unlocks_table)
+	modmeta:set_string("player_" .. player_name, minetest.serialize(unlocks_table))
+end
+
+collectible_lore.unlock = function(player_name, id)
+	local unlocks = collectible_lore.get_player_unlocks(player_name)
+	unlocks[id] = true
+	set_player_unlocks(player_name, unlocks)
+end
+
 dofile(modpath.."/items.lua")
 
 local collectible_lore_sort = function(first, second)
@@ -33,3 +53,4 @@ collectible_lore.register_lorebook = function(def)
 	table.insert(collectible_lore.lorebooks, def)
 	table.sort(collectible_lore.lorebooks, collectible_lore_sort)
 end
+

collectible_lore/items.lua

@@ -1,4 +1,32 @@
 local S = minetest.get_translator(minetest.get_current_modname())
+local modmeta =  minetest.get_mod_storage()
+
+local get_cairn_looted_by_list = function(pos)
+	local loot_list_string = modmeta:get("cairn_" .. minetest.pos_to_string(pos))
+	if not loot_list_string then
+		return {}
+	end
+	return minetest.deserialize(loot_list_string)
+end
+
+local set_cairn_looted_by_list = function(pos, list)
+	modmeta:set_string("cairn_" .. minetest.pos_to_string(pos), minetest.serialize(list))
+end
+
+local cairn_loot = function(pos, player_name)
+	local list = get_cairn_looted_by_list(pos)
+	if list[player_name] then
+		return false
+	end
+	list[player_name] = true
+	local lore_id = collectible_lore.lorebooks[math.random(#(collectible_lore.lorebooks))].id
+	collectible_lore.unlock(player_name, lore_id)
+	minetest.debug("unlocked " .. lore_id)
+	list[player_name] = true
+	set_cairn_looted_by_list(pos, list)
+	return true
+end
+
 
 minetest.register_node("collectible_lore:cairn", {
 	description = S("Cairn"),
@@ -27,24 +55,37 @@ minetest.register_node("collectible_lore:cairn", {
 			{-0.5, -0.5, -0.5, 0.5, 1, 0.5}
 		}
 	},
+	on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
+		local player_name = clicker:get_player_name()
+		if player_name then
+			cairn_loot(pos, player_name)
+		end
+	end,
 })
 
 local player_state = {}
 
+
 local get_formspec_for_player = function(player_name)
 	local selected
 	local state = player_state[player_name] or 1
+	local unlocks = collectible_lore.get_player_unlocks(player_name)
 
 	local form = {}
 	table.insert(form, "formspec_version[6]size[10,8]")
 	table.insert(form, "textlist[0,0;4,7;list;")
 	local count = 1
 	for index, value in pairs(collectible_lore.lorebooks) do
-		if state == count then
+		local unlocked = unlocks[value.id]
+		if unlocked and state == count then
 			selected = value
 		end
 		count = count + 1
-		table.insert(form, minetest.formspec_escape(value.title))
+		if unlocked then
+			table.insert(form, minetest.formspec_escape(value.title))
+		else
+			table.insert(form, S("<Locked>"))
+		end
 		table.insert(form, ",")
 	end
 	table.remove(form) -- removes trailing comma
@@ -52,8 +93,12 @@ local get_formspec_for_player = function(player_name)
 	
 	table.insert(form, "textarea[4.5,0;5.5,7;;text;")
 	
-	local str = selected.text
+	if selected then
-	table.insert(form, minetest.formspec_escape(str))
+		local str = selected.text
+		table.insert(form, minetest.formspec_escape(str))
+	else
+		table.insert(form, " ")
+	end
 	table.insert(form, "]")
 	
 	return table.concat(form)