Refactor datapack code

mods/CORE/class/init.lua

@@ -0,0 +1,45 @@
+local Object = {}
+
+function Object:__define_getter(name, cached, get, cmp)
+	local key = "_" .. name
+	self[name] = function (self, expected)
+		local value
+
+		if cached then
+			value = self[key]
+		end
+
+		if not value then
+			value = get(self)
+		end
+
+		if cached then
+			self[key] =	value
+		end
+
+		if expected ~= nil then
+			if cmp then
+				return cmp(value, expected)
+			else
+				return value == expected
+			end
+		else
+			return value
+		end
+	end
+end
+
+function class(super)
+	return setmetatable({}, {
+		__call = function(_class, ...)
+			local instance = setmetatable({}, {
+				__index = _class,
+			})
+			if instance.constructor then
+				instance:constructor(...)
+			end
+			return instance
+		end,
+		__index = super or Object,
+	})
+end

mods/CORE/class/mod.conf

@@ -0,0 +1,3 @@
+name = class
+author = Fleckenstein
+description = A class system for MineClone2

mods/CORE/mcl_numbers/api.lua

@@ -1,27 +0,0 @@
-mcl_numbers.register_provider = mcl_util.registration_function(mcl_numbers.providers)
-
-function mcl_numbers.get_number(provider, data)
-	return mcl_util.switch_type(provider, {
-		["number"] = function()
-			return provider
-		end,
-		["table"] = function()
-			local func = mcl_numbers.providers[data.type]
-			return func(provider, data)
-		end,
-	}, "number provider")
-end
-
-function mcl_numbers.check_bounds(actual, expected, data)
-	return mcl_util.switch_type(actual, {
-		["nil"] = function()
-			return true
-		end,
-		["number"] = function()
-			return actual == expected
-		end,
-		["table"] = function()
-			return actual <= mcl_numbers.get_number(expected.max, data) and actual >= mcl_numbers.get_number(expected.min, data)
-		end,
-	}, "range")
-end

mods/CORE/mcl_predicates/api.lua

@@ -1,84 +0,0 @@
-mcl_predicates.register_predicate = mcl_util.registration_function(mcl_predicates.predicates) 
-
-function mcl_predicates.get_predicate(id)
-	return mcl_util.switch_type(id, {
-		["function"] = function(v)
-			return v,
-		end,
-		["string"] = function(v)
-			return mcl_predicates.predicates[v]
-		end,
-	}, "predicate")
-end
-
-function mcl_predicates.do_predicates(predicates, data, or_mode)
-	or_mode = or_mode or false
-	for _, def in ipairs() do
-		local func = mcl_predicates.get_predicate(def.condition)
-		local failure = func and not func(def, data) or false
-		if or_mode ~= failure then
-			return or_mode
-		end
-	end
-	return not or_mode or #predicates == 0
-end
-
-function mcl_predicates.match_block(location, block, properties)
-	local node = minetest.get_node(location)
-	if node.name ~= block then
-		return false
-	end
-	if properties then
-		local meta = minetest.get_meta(location)
-		for k, v in pairs(properties) do
-			if meta:get_string(k) ~= v then
-				return false
-			end
-		end
-	end
-	return true
-end
-
-
-function mcl_predicates.match_tool(itemstack, predicate)
-	itemstack = itemstack or ItemStack()
-
-	local itemname = itemstack:get_name()
-
-	local expected_name = predicate.item
-	
-	if expected_name and itemname ~= expected_name then
-		return false
-	end
-
-	local tag = predicate.tag
-
-	if tag and minetest.get_item_group(itemname, predicate) == 0 then
-		return false
-	end
-
-	if not mcl_numbers.check_bounds(itemstack:get_count(), predicate.count, data) then
-		return false
-	end
-
-	-- ToDo: Durability, needs research, needs abstraction ?
-	-- ToDo: potions, "nbt" aka metadata
-
-	local enchantments, stored_enchantments = predicate.enchantments, predicate.stored_enchantments
-	
-	if enchantments and stored_enchantments then
-		enchantments = table.copy(enchantments)
-		table.insert_all(enchantments, stored_enchantments)
-	elseif stored_enchantments then
-		enchantments = stored_enchantments
-	end
-	if enchantments then
-		local actual_enchantments = mcl_enchanting.get_enchantments(itemstack)
-		for _, def in ipairs(actual_enchantments) do
-			local level = actual_enchantments[def.enchantment]
-			if not mcl_numbers.check_bounds(level, def.levels or {min = 1, max = math.huge}, data) then
-				return false
-			end
-		end
-	end
-end

mods/CORE/mcl_predicates/mod.conf

@@ -1,4 +0,0 @@
-name = mcl_predicates
-author = Fleckenstein
-description = Provides MC-like predicates 
-depends = mcl_util, mcl_number

mods/DATA/mcl_loottables/api.lua

@@ -9,21 +9,6 @@ mcl_loottables.register_table = mcl_util.registration_function(mcl_loottables.ta
 	set_parents(def)
 end)
 
-
-function mcl_loottables.get_table(def)
-	return mcl_util.switch_type(def, {
-		["nil"] = function()
-			return {}
-		end,
-		["string"] = function()
-			return mcl_loottables.tables[def], "table"
-		end,
-		["table"] = function()
-			return def
-		end,
-	}, "loot table")
-end
-
 function mcl_loottables.get_entry_type(entry)
 	return mcl_loottables.entries[entry.type]
 end
@@ -32,7 +17,7 @@ function mcl_loottables.get_candidates(entries, data, func)
 	local candidates = {}
 	for _, entry in ipairs(entries) do
 		local success = mcl_predicates.do_predicates(entry.conditions, data)
-		
+
 		if success then
 			local children = entry.children
 
@@ -52,7 +37,7 @@ end
 
 function mcl_loottables.do_item_modifiers(itemstack, node, data)
 	if node then
-		mcl_functions.do_item_modifiers(itemstack, node.functions, data)
+		mcl_item_modifiers.do_item_modifiers(itemstack, node.functions, data)
 		mcl_loottables.do_item_modifiers(itemstack, node.parent, data)
 	end
 end
@@ -61,8 +46,8 @@ function mcl_loottables.do_pools(pools, functions, data)
 	local luck = data.luck or 0
 	local stacks = {}
 	for _, pool in ipairs(pools or {}) do
-		if mcl_conditions.do_conditions(pool.conditions, data) do
-			local rolls = mcl_loottables.get_number(pool.rolls, data) + mcl_loottables.get_number(pool.bonus_rolls, data) * luck
+		if mcl_predicates.do_predicates(pool.conditions, data) do
+			local rolls = mcl_numbers.get_number(pool.rolls, data) + mcl_numbers.get_number(pool.bonus_rolls, data) * luck
 			for i = 1, rolls do
 				local candidates = mcl_loottables.get_candidates(pool.entries, data)
 
@@ -73,7 +58,7 @@ function mcl_loottables.do_pools(pools, functions, data)
 						total_weight = total_weight + math.floor((candidate.weight or 1) + (candidate.quality or 0) * luck)
 						table.insert(weights, total_weight)
 					end
-					
+
 					local selected
 					local rnd = mcl_util.rand(data.pr, 0, weight - 1)
 					for i, w in ipairs(weights) do
@@ -82,14 +67,13 @@ function mcl_loottables.do_pools(pools, functions, data)
 							break
 						end
 					end
-					
-					local func = mcl_loottables.get_entry_type(entry).process
-					local stacks = func(selected, data)
 
-					for _, stack in ipairs(stacks) do
+					local pool_stacks = mcl_loottables.get_entry_type(entry).process(selected, data)
+
+					for _, stack in ipairs(pool_stacks) do
 						mcl_item_modifiers.do_item_modifiers(stack, selected, data)
 					end
-					table.insert_all(stacks, stack)
+					table.insert_all(stacks, pool_stacks)
 				end
 			end
 		end
@@ -98,7 +82,9 @@ function mcl_loottables.do_pools(pools, functions, data)
 end
 
 function mcl_loottables.get_loot(def, data)
-	def = mcl_loottables.get_table(def)
+	if type(def) == "string" then
+		def = mcl_loottables.tables[def]
+	end
 	return mcl_loottables.do_pools(def.pools)
 end
 
@@ -113,7 +99,3 @@ function mcl_loottables.drop_loot(def, data)
 	end
 	return loot
 end
-
-function mcl_loottables.fill_chest(def, data)
-	local loot = mcl_loottables.get_loot(def, data)
-end

mods/DATA/mcl_loottables/mod.conf

@@ -1,4 +1,4 @@
 name = mcl_loot
 author = Fleckenstein
 description = Provides Minecraft-like loot table definitions
-depends = mcl_util, mcl_predicates, mcl_item_modifiers
+depends = mcl_util, mcl_predicates, mcl_item_modifiers, mcl_groupcache

mods/DATA/mcl_numbers/api.lua

@@ -0,0 +1,19 @@
+mcl_numbers.register_provider = mcl_util.registration_function(mcl_numbers.providers)
+
+function mcl_numbers.get_number(provider, data)
+	if type(provider) == "number" then
+		return provider
+	else
+		mcl_numbers.providers[data.type](provider, data)
+	end
+end
+
+function mcl_numbers.match_bounds(actual, expected, data)
+	if type(expected) == "table" then
+		expected = {
+			min = mcl_numbers.get_number(expected.min, data),
+			max = mcl_numbers.get_number(expected.max, data)
+		}
+	end
+	return mcl_util.match_bounds(actual, expected)
+end

mods/DATA/mcl_predicates/api.lua

@@ -0,0 +1,15 @@
+mcl_predicates.register_predicate = mcl_util.registration_function(mcl_predicates.predicates)
+
+function mcl_predicates.do_predicates(predicates, data, or_mode)
+	or_mode = or_mode or false
+	for _, func in ipairs(predicates) do
+		if type(func) == "string" then
+			func = mcl_predicates.predicates[func]
+		end
+		local failure = func and not func(def, data) or false
+		if or_mode ~= failure then
+			return or_mode
+		end
+	end
+	return not or_mode or #predicates == 0
+end

mods/DATA/mcl_predicates/init.lua

@@ -10,8 +10,8 @@ mcl_predicates.register_predicate("alternative", function(predicate, data)
 	return mcl_predicates.do_predicates(predicate.terms, data, true)
 end)
 
-mcl_predicates.register_predicate("block_state_property", function(predicate, data)
-	return mcl_predicates.match_block(predicate.block, predicate.properties, data.location)
+mcl_predicates.register_predicate("match_node", function(predicate, data)
+	return mcl_types.match_node(data.node or minetest.get_node(data.pos), predicate, data.pos, data.nodemeta)
 end)
 
 mcl_predicates.register_predicate("damage_source_properties", function(predicate, data)
@@ -24,7 +24,7 @@ mcl_predicates.register_predicate("entity_properties", function(predicate, data)
 	if not entity or (entity ~= "this" and entity ~= "killer" and entity ~= "killer_player") then
 		return false
 	end
-	
+
 	local ref = data[entity]
 	if not ref then
 		return false
@@ -48,14 +48,8 @@ mcl_predicates.register_predicate("killed_by_player", function(predicate, data)
 end)
 
 mcl_predicates.register_predicate("location_check", function(predicate, data)
-	local location = vector.new(data.location)
-
-	location.x = location.x + (data.offsetX or 0)
-	location.y = location.y + (data.offsetY or 0)
-	location.z = location.z + (data.offsetZ or 0)
-
-	-- ToDo, needs abstraction?
-	return nil
+	local pos = vector.add(data.pos), vector.new(predicate.offset_x or 0, predicate.offset_y or 0, predicate.offset_z or 0))
+	return mcl_location(pos, data.nodemeta):match(predicate.predicate)
 end)
 
 mcl_predicates.register_predicate("match_tool", function(predicate, data)
@@ -94,7 +88,7 @@ end)
 
 mcl_predicates.register_predicate("weather_check", function(predicate, data)
 	local weather = mcl_weather.get_weather()
-	
+
 	if predicate.thundering then
 		return weather == "thunder"
 	elseif predicate.raining then

mods/DATA/mcl_predicates/mod.conf

@@ -0,0 +1,4 @@
+name = mcl_predicates
+author = Fleckenstein
+description = Provides MC-like predicates
+depends = mcl_util, mcl_numbers

mods/DATA/mcl_types/init.lua

@@ -0,0 +1,88 @@
+mcl_types = {}
+
+function mcl_types.match_bounds(actual, expected)
+	if type(expected) == "table" then
+		return actual <= expected.max and actual >= expected.min
+	else
+		return actual == expected
+	end
+end
+
+function mcl_types.match_meta(actual, expected)
+	for k, v in pairs(expected) do
+		if actual:get_string(k) ~= v then
+			return false
+		end
+	end
+	return true
+end
+
+function mcl_types.match_vector(actual, expected)
+	for k, v in pairs(expected) do
+		if not mcl_types.match_bounds(actual[k], expected[k]) then
+			return false
+		end
+	end
+	return true
+end
+
+function mcl_types.match_enchantments(actual, expected)
+	for _, v in ipairs(expected) do
+		if not mcl_types.match_bounds(actual[v.enchantment] or 0, v.levels or {min = 1, max = math.huge}) then
+			return false
+		end
+	end
+	return true
+end
+
+function mcl_util.match_item(actual, expected)
+	actual = actual or ItemStack()
+
+	if expected.item and actual:get_name() ~= expected.item then
+		return false
+	elseif expected.group and minetest.get_item_group(actual:get_name(), expected.group) == 0 then
+		return false
+	elseif expected.count and not mcl_types.match_bounds(actual:get_count(), expected.count) then
+		return false
+	elseif expected.wear and not mcl_types.match_bounds(actual:get_wear(), expected.wear) then
+		return false
+	elseif expected.enchantments and not mcl_types.match_enchantments(mcl_enchanting.get_enchantments(actual), expected.enchantments) then
+		return false
+	elseif expected.meta and not mcl_types.match_meta(actual:get_meta(), expected.meta) then
+		return false
+	else
+		return true
+	end
+end
+
+function mcl_util.match_node(actual, expected, pos, meta)
+	if expected.node and actual.name ~= expected.node then
+		return false
+	elseif expected.group and minetest.get_item_group(actual.name, expected.group) == 0 then
+		return false
+	elseif expected.param1 and actual.param1 ~= compare.param1 then
+		return false
+	elseif expected.param2 and actual.param2 ~= compare.param2 then
+		return false
+	elseif expected.meta and not mcl_types.match_meta(meta or minetest.get_meta(pos), expected.meta) then
+		return false
+	else
+		return true
+	end
+end
+
+function mcl_types.match_pos(actual, expected, meta)
+	if expected.pos and not mcl_types.match_vector(actual, expected.pos) then
+		return false
+	elseif expected.dimension and mcl_worlds.pos_to_dimension(actual) ~= expected.dimension then
+		return false
+	elseif expected.biome and minetest.get_biome_name(minetest.get_biome_data(actual).biome) ~= expected.biome then
+		return false
+	elseif expected.node and not mcl_types.match_node(minetest.get_node(actual), expected.node, actual, meta)
+		return false
+	elseif expected.light and not mcl_types.match_bounds(minetest.get_node_light(actual), expected.light) then
+		return false
+	else
+		return true
+	end
+end

mods/DATA/mcl_types/mod.conf

@@ -0,0 +1,3 @@
+name = mcl_types
+author = Fleckenstein
+description = Offers compare functions for many types, used for MineClone2 datapacks

mods/DATA/modpack.conf

@@ -0,0 +1,2 @@
+name = DATA
+description = Meta-modpack containing the datapack system for MineClone 2