Dynamically read the number of available levels

mods/lzr_levels/data/level_data.csv

@@ -0,0 +1,5 @@
+lzr_levels_level_1.mts,Level 1
+lzr_levels_level_2.mts,Level 2
+lzr_levels_level_3.mts,Level 3
+lzr_levels_level_4.mts,Level 4
+lzr_levels_level_5.mts,Level 5

mods/lzr_levels/init.lua

@@ -6,24 +6,38 @@ local ROOM_NODE = "lzr_core:wood"
 local WINDOW_NODE = "lzr_decor:woodframed_glass"
 local WINDOW_HEIGHT = 3
 local WINDOW_DIST = 3
-lzr_levels.LAST_LEVEL = 10
 
 local current_level = nil
 
 local level_data = {}
+lzr_levels.LAST_LEVEL = 0
 
 -- Mod storage for game progress
 local mod_storage = minetest.get_mod_storage()
 
 -- Read the level schematics to find out some metadata about them
+-- and count the number of levels
 local analyze_levels = function()
+	local level_list_path = minetest.get_modpath("lzr_levels").."/data/level_data.csv"
+	local level_list_file = io.open(level_list_path, "r")
+	assert(level_list_file, "Could not load level_data.csv")
+	
+	for line in level_list_file:lines() do
+		local matches = string.split(line, ",")
+		assert(matches ~= nil, "Malformed level_data.csv")
+		local filename = matches[1]
+		table.insert(level_data, {filename=filename})
+	end
+	lzr_levels.LAST_LEVEL = #level_data
+
 	-- Mark levels that contain at least 1 rotatable block
-	for l=1, lzr_levels.LAST_LEVEL do
-		local schem = minetest.read_schematic(minetest.get_modpath("lzr_levels").."/schematics/lzr_levels_level_"..l..".mts", {write_yslice_prob="none"})
-		level_data[l] = {
-			contains_rotatable_block = false,
-			size = schem.size,
-		}
+	for l=1, #level_data do
+		local filename = level_data[l].filename
+		local filepath = minetest.get_modpath("lzr_levels").."/schematics/"..filename
+		local schem = minetest.read_schematic(filepath, {write_yslice_prob="none"})
+		assert(schem, "Could not load level file: "..filename)
+		level_data[l].contains_rotatable_block = false
+		level_data[l].size = schem.size
 		for d=1, #schem.data do
 			local nodename = schem.data[d].name
 			local is_rotatable = minetest.get_item_group(nodename, "rotatable") == 1
@@ -93,7 +107,8 @@ function lzr_levels.prepare_and_build_level(level)
 end
 
 function lzr_levels.build_level(level)
-	local schem = minetest.place_schematic(lzr_globals.LEVEL_POS, minetest.get_modpath("lzr_levels").."/schematics/lzr_levels_level_"..level..".mts", "0", {}, true, "")
+	local filepath = minetest.get_modpath("lzr_levels").."/schematics/"..level_data[level].filename
+	local schem = minetest.place_schematic(lzr_globals.LEVEL_POS, filepath, "0", {}, true, "")
 	if schem then
 		-- Propagate lasers and check for insta-win
 		lzr_laser.full_laser_update(lzr_globals.PLAYFIELD_START, lzr_globals.PLAYFIELD_END)