Split init.lua into separate files (Part I)

etc/progressive.lua

@@ -0,0 +1,301 @@
+local POLL_FREQ = 0.25
+local HUD_TIMER_MAX = 1.5
+
+local set_fs = i3.set_fs
+local modpath = core.get_modpath "i3"
+local search, table_merge, is_group, extract_groups, item_has_groups, apply_recipe_filters =
+	unpack(dofile(modpath .. "/etc/common.lua").progressive)
+
+local singleplayer = core.is_singleplayer()
+local fmt, after = string.format, core.after
+
+local function array_diff(t1, t2)
+	local hash = {}
+
+	for i = 1, #t1 do
+		local v = t1[i]
+		hash[v] = true
+	end
+
+	for i = 1, #t2 do
+		local v = t2[i]
+		hash[v] = nil
+	end
+
+	local diff, c = {}, 0
+
+	for i = 1, #t1 do
+		local v = t1[i]
+		if hash[v] then
+			c = c + 1
+			diff[c] = v
+		end
+	end
+
+	return diff
+end
+
+local function get_filtered_items(player, data)
+	local items, known, c = {}, 0, 0
+
+	for i = 1, #i3.init_items do
+		local item = i3.init_items[i]
+		local recipes = i3.recipes_cache[item]
+		local usages = i3.usages_cache[item]
+
+		recipes = #apply_recipe_filters(recipes or {}, player)
+		usages = #apply_recipe_filters(usages or {}, player)
+
+		if recipes > 0 or usages > 0 then
+			c = c + 1
+			items[c] = item
+
+			if data then
+				known = known + recipes + usages
+			end
+		end
+	end
+
+	if data then
+		data.known_recipes = known
+	end
+
+	return items
+end
+
+local function item_in_inv(item, inv_items)
+	local inv_items_size = #inv_items
+
+	if is_group(item) then
+		local groups = extract_groups(item)
+
+		for i = 1, inv_items_size do
+			local def = core.registered_items[inv_items[i]]
+
+			if def then
+				if item_has_groups(def.groups, groups) then
+					return true
+				end
+			end
+		end
+	else
+		for i = 1, inv_items_size do
+			if inv_items[i] == item then
+				return true
+			end
+		end
+	end
+end
+
+local function recipe_in_inv(rcp, inv_items)
+	for _, item in pairs(rcp.items) do
+		if not item_in_inv(item, inv_items) then return end
+	end
+
+	return true
+end
+
+local function progressive_filter(recipes, player)
+	if not recipes then
+		return {}
+	end
+
+	local name = player:get_player_name()
+	local data = i3.data[name]
+
+	if #data.inv_items == 0 then
+		return {}
+	end
+
+	local filtered, c = {}, 0
+
+	for i = 1, #recipes do
+		local recipe = recipes[i]
+		if recipe_in_inv(recipe, data.inv_items) then
+			c = c + 1
+			filtered[c] = recipe
+		end
+	end
+
+	return filtered
+end
+
+local item_lists = {"main", "craft", "craftpreview"}
+
+local function get_inv_items(player)
+	local inv = player:get_inventory()
+	local stacks = {}
+
+	for i = 1, #item_lists do
+		local list = inv:get_list(item_lists[i])
+		table_merge(stacks, list)
+	end
+
+	local inv_items, c = {}, 0
+
+	for i = 1, #stacks do
+		local stack = stacks[i]
+
+		if not stack:is_empty() then
+			local name = stack:get_name()
+			if core.registered_items[name] then
+				c = c + 1
+				inv_items[c] = name
+			end
+		end
+	end
+
+	return inv_items
+end
+
+local function init_hud(player, data)
+	data.hud = {
+		bg = player:hud_add {
+			hud_elem_type = "image",
+			position      = {x = 0.78, y = 1},
+			alignment     = {x = 1,    y = 1},
+			scale         = {x = 370,  y = 112},
+			text          = "i3_bg.png",
+			z_index       = 0xDEAD,
+		},
+
+		book = player:hud_add {
+			hud_elem_type = "image",
+			position      = {x = 0.79, y = 1.02},
+			alignment     = {x = 1,    y = 1},
+			scale         = {x = 4,    y = 4},
+			text          = "i3_book.png",
+			z_index       = 0xDEAD,
+		},
+
+		text = player:hud_add {
+			hud_elem_type = "text",
+			position      = {x = 0.84, y = 1.04},
+			alignment     = {x = 1,    y = 1},
+			number        = 0xffffff,
+			text          = "",
+			z_index       = 0xDEAD,
+			style         = 1,
+		},
+	}
+end
+
+local function show_hud_success(player, data)
+	-- It'd better to have an engine function `hud_move` to only need
+	-- 2 calls for the notification's back and forth.
+
+	local hud_info_bg = player:hud_get(data.hud.bg)
+	local dt = 0.016
+
+	if hud_info_bg.position.y <= 0.9 then
+		data.show_hud = false
+		data.hud_timer = (data.hud_timer or 0) + dt
+	end
+
+	if data.show_hud then
+		for _, def in pairs(data.hud) do
+			local hud_info = player:hud_get(def)
+
+			player:hud_change(def, "position", {
+				x = hud_info.position.x,
+				y = hud_info.position.y - (dt / 5)
+			})
+		end
+
+		player:hud_change(data.hud.text, "text",
+			fmt("%u new recipe%s unlocked!",
+				data.discovered, data.discovered > 1 and "s" or ""))
+
+	elseif data.show_hud == false then
+		if data.hud_timer >= HUD_TIMER_MAX then
+			for _, def in pairs(data.hud) do
+				local hud_info = player:hud_get(def)
+
+				player:hud_change(def, "position", {
+					x = hud_info.position.x,
+					y = hud_info.position.y + (dt / 5)
+				})
+			end
+
+			if hud_info_bg.position.y >= 1 then
+				data.show_hud = nil
+				data.hud_timer = nil
+			end
+		end
+	end
+end
+
+-- Workaround. Need an engine call to detect when the contents of
+-- the player inventory changed, instead.
+local function poll_new_items()
+	local players = core.get_connected_players()
+
+	for i = 1, #players do
+		local player = players[i]
+		local name = player:get_player_name()
+		local data = i3.data[name]
+		if not data then return end
+
+		local inv_items = get_inv_items(player)
+		local diff = array_diff(inv_items, data.inv_items)
+
+		if #diff > 0 then
+			data.inv_items = table_merge(diff, data.inv_items)
+			local oldknown = data.known_recipes or 0
+			local items = get_filtered_items(player, data)
+			data.discovered = data.known_recipes - oldknown
+
+			if data.show_hud == nil and data.discovered > 0 then
+				data.show_hud = true
+			end
+
+			data.items_raw = items
+			data.current_itab = 1
+
+			search(data)
+			set_fs(player)
+		end
+	end
+
+	after(POLL_FREQ, poll_new_items)
+end
+
+poll_new_items()
+
+if singleplayer then
+	core.register_globalstep(function()
+		local name = "singleplayer"
+		local player = core.get_player_by_name(name)
+		local data = i3.data[name]
+
+		if data and data.show_hud ~= nil then
+			show_hud_success(player, data)
+		end
+	end)
+end
+
+i3.add_recipe_filter("Default progressive filter", progressive_filter)
+
+core.register_on_joinplayer(function(player)
+	local name = player:get_player_name()
+	local data = i3.data[name]
+	if not data then return end
+
+	data.inv_items = data.inv_items or {}
+	data.known_recipes = data.known_recipes or 0
+
+	local oldknown = data.known_recipes
+	local items = get_filtered_items(player, data)
+	data.discovered = data.known_recipes - oldknown
+
+	data.items_raw = items
+	search(data)
+
+	if singleplayer then
+		init_hud(player, data)
+
+		if data.show_hud == nil and data.discovered > 0 then
+			data.show_hud = true
+		end
+	end
+end)