Minetest 5.2+ required to use craftguide

init.lua

@@ -1,12 +1,5 @@
 craftguide = {}
 
-local p = 0
-local CORE_VERSION = core.get_version().string:match("[^%-]*"):gsub("%.", function(a)
-	p = p + 1
-	return p == 3 and a or ""
-end)
-CORE_VERSION = tonumber(CORE_VERSION)
-
 -- Caches
 local pdata         = {}
 local init_items    = {}
@@ -19,6 +12,11 @@ local toolrepair
 
 local progressive_mode = core.settings:get_bool("craftguide_progressive_mode")
 local sfinv_only = core.settings:get_bool("craftguide_sfinv_only") and rawget(_G, "sfinv")
+local enable_cache_progress_bar = core.settings:get_bool("craftguide_enable_cache_progress_bar")
+
+if enable_cache_progress_bar == nil then
+	enable_cache_progress_bar = true
+end
 
 local http = core.request_http_api()
 
@@ -44,26 +42,19 @@ local get_player_by_name = core.get_player_by_name
 local slz, dslz = core.serialize, core.deserialize
 local on_mods_loaded = core.register_on_mods_loaded
 local on_leaveplayer = core.register_on_leaveplayer
+local get_player_info = core.get_player_information
 local on_receive_fields = core.register_on_player_receive_fields
 
 local ESC = core.formspec_escape
-local S = CORE_VERSION >= 500 and core.get_translator("craftguide") or
+local S = core.get_translator("craftguide")
-	function(...)
-		local args, i = {...}, 1
-
-		return args[1]:gsub("@%d+", function()
-			i = i + 1
-			return args[i]
-		end)
-	end
 
 local ES = function(...)
 	return ESC(S(...))
 end
 
-local maxn, sort, concat, copy, insert, remove =
+local maxn, sort, concat, copy, insert, remove, unpack =
 	table.maxn, table.sort, table.concat, table.copy,
-	table.insert, table.remove
+	table.insert, table.remove, unpack
 
 local fmt, find, gmatch, match, sub, split, upper, lower =
 	string.format, string.find, string.gmatch, string.match,
@@ -73,26 +64,31 @@ local min, max, floor, ceil = math.min, math.max, math.floor, math.ceil
 local pairs, next, type, tostring, io = pairs, next, type, tostring, io
 local vec_add, vec_mul = vector.add, vector.multiply
 
+local FORMSPEC_MINIMAL_VERSION = 3
+
 local ROWS  = 9
 local LINES = sfinv_only and 5 or 9
 local IPP   = ROWS * LINES
 local WH_LIMIT = 8
 
 local XOFFSET = sfinv_only and 3.83 or 11.2
-local YOFFSET = sfinv_only and 6 or 1
+local YOFFSET = sfinv_only and 4.9 or 1
 
 local PNG = {
-	bg       = "craftguide_bg.png",
+	bg        = "craftguide_bg.png",
-	bg_full  = "craftguide_bg_full.png",
+	bg_full   = "craftguide_bg_full.png",
-	search   = "craftguide_search_icon.png",
+	search    = "craftguide_search_icon.png",
-	clear    = "craftguide_clear_icon.png",
+	clear     = "craftguide_clear_icon.png",
-	prev     = "craftguide_next_icon.png^\\[transformFX",
+	prev      = "craftguide_next_icon.png^\\[transformFX",
-	next     = "craftguide_next_icon.png",
+	next      = "craftguide_next_icon.png",
-	arrow    = "craftguide_arrow.png",
+	arrow     = "craftguide_arrow.png",
-	fire     = "craftguide_fire.png",
+	fire      = "craftguide_fire.png",
-	book     = "craftguide_book.png",
+	fire_anim = "craftguide_fire_anim.png",
-	sign     = "craftguide_sign.png",
+	book      = "craftguide_book.png",
-	selected = "craftguide_selected.png",
+	sign      = "craftguide_sign.png",
+	nothing   = "craftguide_no.png",
+	selected  = "craftguide_selected.png",
+	furnace_anim = "craftguide_furnace_anim.png",
 
 	search_hover = "craftguide_search_icon_hover.png",
 	clear_hover  = "craftguide_clear_icon_hover.png",
@@ -108,10 +104,16 @@ local FMT = {
 	tooltip = "tooltip[%f,%f;%f,%f;%s]",
 	item_image = "item_image[%f,%f;%f,%f;%s]",
 	image_button = "image_button[%f,%f;%f,%f;%s;%s;%s]",
+	animated_image = "animated_image[%f,%f;%f,%f;;%s;%u;%u]",
 	item_image_button = "item_image_button[%f,%f;%f,%f;%s;%s;%s]",
 	arrow = "image_button[%f,%f;0.8,0.8;%s;%s;;;false;%s]",
 }
 
+local function get_fs_version(name)
+	local info = get_player_info(name)
+	return info and info.formspec_version or 1
+end
+
 local function mul_elem(elem, n)
 	local fstr, elems = "", {}
 
@@ -590,10 +592,15 @@ local function get_recipes(item, data, player)
 	end
 
 	local no_recipes = not recipes or #recipes == 0
+
 	if no_recipes and not usages then
 		return
-	elseif sfinv_only and usages and no_recipes then
+	elseif sfinv_only then
-		data.show_usages = true
+		if usages and no_recipes then
+			data.show_usages = true
+		elseif recipes and not usages then
+			data.show_usages = nil
+		end
 	end
 
 	if not sfinv_only or (sfinv_only and data.show_usages) then
@@ -653,6 +660,10 @@ local function is_fav(data)
 end
 
 local function get_desc(name)
+	if sub(name, 1, 1) == "_" then
+		name = sub(name, 2)
+	end
+
 	local def = reg_items[name]
 
 	return def and (match(def.description, "%)([%w%s]*)") or def.description) or
@@ -713,7 +724,7 @@ local function get_tooltip(name, info)
 	return fmt("tooltip[%s;%s]", name, ESC(tooltip))
 end
 
-local function get_output_fs(fs, L)
+local function get_output_fs(data, fs, L)
 	local custom_recipe = craft_types[L.recipe.type]
 
 	if custom_recipe or L.shapeless or L.recipe.type == "cooking" then
@@ -727,14 +738,15 @@ local function get_output_fs(fs, L)
 		local pos_x = L.rightest + L.btn_size + 0.1
 		local pos_y = YOFFSET + (sfinv_only and 0.25 or -0.45)
 
-		fs[#fs + 1] = fmt(FMT.image, pos_x, pos_y + L.spacing, 0.5, 0.5, icon)
+		if sub(icon, 1, 18) == "craftguide_furnace" then
+			fs[#fs + 1] = fmt(FMT.animated_image,
+				pos_x, pos_y + L.spacing, 0.5, 0.5, PNG.furnace_anim, 8, 180)
+		end
 
 		local tooltip = custom_recipe and custom_recipe.description or
 				L.shapeless and S"Shapeless" or S"Cooking"
 
-		if CORE_VERSION >= 500 then
+		fs[#fs + 1] = fmt(FMT.tooltip, pos_x, pos_y + L.spacing, 0.5, 0.5, ESC(tooltip))
-			fs[#fs + 1] = fmt(FMT.tooltip, pos_x, pos_y + L.spacing, 0.5, 0.5, ESC(tooltip))
-		end
 	end
 
 	local arrow_X = L.rightest + (L._btn_size or 1.1)
@@ -745,23 +757,23 @@ local function get_output_fs(fs, L)
 		0.9, 0.7, PNG.arrow)
 
 	if L.recipe.type == "fuel" then
-		fs[#fs + 1] = fmt(FMT.image,
+		fs[#fs + 1] = fmt(FMT.animated_image,
 			output_X, YOFFSET + (sfinv_only and 0.7 or 0) + L.spacing,
-			1.1, 1.1, PNG.fire)
+			1.1, 1.1, PNG.fire_anim, 8, 180)
 	else
 		local item = L.recipe.output
 		item = clean_name(item)
 		local name = match(item, "%S*")
 
-		if CORE_VERSION >= 510 then
+		fs[#fs + 1] = fmt(FMT.image,
-			fs[#fs + 1] = fmt(FMT.image,
-				output_X, YOFFSET + (sfinv_only and 0.7 or 0) + L.spacing,
-				1.1, 1.1, PNG.selected)
-		end
-
-		fs[#fs + 1] = fmt(FMT.item_image_button,
 			output_X, YOFFSET + (sfinv_only and 0.7 or 0) + L.spacing,
-			1.1, 1.1, item, name, "")
+			1.1, 1.1, PNG.selected)
+
+		local _name = sfinv_only and name or fmt("_%s", name)
+
+		fs[#fs + 1] = fmt("item_image_button[%f,%f;%f,%f;%s;%s;%s]",
+			output_X, YOFFSET + (sfinv_only and 0.7 or 0) + L.spacing,
+			1.1, 1.1, item, _name, "")
 
 		local infos = {
 			unknown  = not reg_items[name] or nil,
@@ -771,7 +783,7 @@ local function get_output_fs(fs, L)
 		}
 
 		if next(infos) then
-			fs[#fs + 1] = get_tooltip(name, infos)
+			fs[#fs + 1] = get_tooltip(_name, infos)
 		end
 
 		if infos.burntime then
@@ -779,14 +791,14 @@ local function get_output_fs(fs, L)
 				output_X + 1, YOFFSET + (sfinv_only and 0.7 or 0.1) + L.spacing,
 				0.6, 0.4, PNG.arrow)
 
-			fs[#fs + 1] = fmt(FMT.image,
+			fs[#fs + 1] = fmt(FMT.animated_image,
 				output_X + 1.6, YOFFSET + (sfinv_only and 0.55 or 0) + L.spacing,
-				0.6, 0.6, PNG.fire)
+				0.6, 0.6, PNG.fire_anim, 8, 180)
 		end
 	end
 end
 
-local function get_grid_fs(fs, rcp, spacing)
+local function get_grid_fs(data, fs, rcp, spacing)
 	local width = rcp.width or 1
 	local replacements = rcp.replacements
 	local rarity = rcp.rarity
@@ -865,7 +877,7 @@ local function get_grid_fs(fs, rcp, spacing)
 			end
 		end
 
-		if CORE_VERSION >= 510 and not large_recipe then
+		if not large_recipe then
 			fs[#fs + 1] = fmt(FMT.image,
 				X, Y + (sfinv_only and 0.7 or 0), btn_size, btn_size, PNG.selected)
 		end
@@ -891,7 +903,7 @@ local function get_grid_fs(fs, rcp, spacing)
 		fs[#fs + 1] = "style_type[item_image_button;border=false]"
 	end
 
-	get_output_fs(fs, {
+	get_output_fs(data, fs, {
 		recipe    = rcp,
 		shapeless = shapeless,
 		rightest  = rightest,
@@ -903,15 +915,16 @@ local function get_grid_fs(fs, rcp, spacing)
 end
 
 local function get_panels(data, fs)
-	local start_y = CORE_VERSION >= 520 and 0 or 0.33
+	local start_y = sfinv_only and 0.33 or 0
+
 	local panels = {
 		{dat = data.usages or {}, height = 3.5},
 		{dat = data.recipes or {}, height = 3.5},
 	}
 
-	if CORE_VERSION >= 520 and not sfinv_only then
+	if not sfinv_only then
-		panels.favs = {dat = {}, height = 2.19}
+		panels.favs = {height = 2.19}
-	elseif sfinv_only then
+	else
 		panels = data.show_usages and
 			{{dat = data.usages}} or {{dat = data.recipes}}
 	end
@@ -921,13 +934,10 @@ local function get_panels(data, fs)
 		local spacing = (start_y - 1) * 3.6
 
 		if not sfinv_only then
-			fs[#fs + 1] = CORE_VERSION >= 510 and
+			fs[#fs + 1] = fmt("background9[8.1,%f;6.6,%f;%s;false;%d]",
-				fmt("background9[8.1,%f;6.6,%f;%s;false;%d]",
+				-0.2 + spacing, v.height, PNG.bg_full, 10)
-					-0.2 + spacing, v.height, PNG.bg_full, 10) or
-				fmt("background[8.1,%f;6.6,%f;%s;false]",
-					-0.2 + spacing, v.height, PNG.bg_full)
 
-			if k ~= "favs" then
+			if k == 2 then
 				local fav = is_fav(data)
 				local nfavs = #data.favs
 
@@ -947,18 +957,23 @@ local function get_panels(data, fs)
 			end
 		end
 
-		local rn = #v.dat
+		local rn = v.dat and #v.dat or -1
 		local _rn = tostring(rn)
 		local xu = tostring(data.unum) .. _rn
 		local xr = tostring(data.rnum) .. _rn
 		xu = max(-0.3, -((#xu - 3) * 0.05))
 		xr = max(-0.3, -((#xr - 3) * 0.05))
 
-		local is_recipe = k == 2
+		local is_recipe = sfinv_only and not data.show_usages or k == 2
-		local lbl
+		local lbl = ""
 
 		if not sfinv_only and rn == 0 then
-			lbl = clr("#f00", is_recipe and ES"No recipes" or ES"No usages")
+			fs[#fs + 1] = fmt(FMT.image,
+				XOFFSET - 0.7, YOFFSET - 0.4 + spacing, 2, 2, PNG.nothing)
+
+			fs[#fs + 1] = fmt(FMT.tooltip,
+				XOFFSET - 0.7, YOFFSET - 0.4 + spacing, 2, 2,
+				is_recipe and ES"No recipes" or ES"No usages")
 
 		elseif (not sfinv_only and is_recipe) or
 				(sfinv_only and not data.show_usages) then
@@ -975,34 +990,27 @@ local function get_panels(data, fs)
 
 		fs[#fs + 1] = fmt(FMT.label,
 			XOFFSET + (sfinv_only and 2.3 or 1.6) + (is_recipe and xr or xu),
-			YOFFSET + (sfinv_only and 2.3 or 1.5 + spacing), lbl)
+			YOFFSET + (sfinv_only and 3.4 or 1.5 + spacing), lbl)
 
 		if rn > 1 then
 			local btn_suffix = is_recipe and "recipe" or "usage"
 			local prev_name = fmt("prev_%s", btn_suffix)
 			local next_name = fmt("next_%s", btn_suffix)
 			local x_arrow = XOFFSET + (sfinv_only and 1.7 or 1)
-			local y_arrow = YOFFSET + (sfinv_only and 2.2 or 1.4 + spacing)
+			local y_arrow = YOFFSET + (sfinv_only and 3.3 or 1.4 + spacing)
 
-			if CORE_VERSION >= 520 then
+			fs[#fs + 1] = fmt(mul_elem(FMT.arrow, 2),
-				fs[#fs + 1] = fmt(mul_elem(FMT.arrow, 2),
+				x_arrow + (is_recipe and xr or xu), y_arrow,
-					x_arrow + (is_recipe and xr or xu), y_arrow,
+					PNG.prev, prev_name, "",
-						PNG.prev, prev_name, "",
+				x_arrow + 1.8, y_arrow, PNG.next, next_name, "")
-					x_arrow + 1.8, y_arrow, PNG.next, next_name, "")
-			else
-				fs[#fs + 1] = fmt(mul_elem(FMT.arrow, 2),
-					x_arrow + (is_recipe and xr or xu),
-						y_arrow, PNG.prev, prev_name, PNG.prev_hover,
-					x_arrow + 1.8, y_arrow, PNG.next, next_name, PNG.next_hover)
-			end
 		end
 
-		local rcp = is_recipe and v.dat[data.rnum] or v.dat[data.unum]
+		local rcp = v.dat and (is_recipe and v.dat[data.rnum] or v.dat[data.unum])
 		if rcp then
-			get_grid_fs(fs, rcp, spacing)
+			get_grid_fs(data, fs, rcp, spacing)
 		end
 
-		if k == "favs" and CORE_VERSION >= 520 and not sfinv_only then
+		if k == "favs" and not sfinv_only then
 			fs[#fs + 1] = fmt(FMT.label, 8.3, spacing - 0.1, ES"Bookmarks")
 
 			for i = 1, #data.favs do
@@ -1022,64 +1030,48 @@ local function get_panels(data, fs)
 	end
 end
 
-local function make_formspec(name)
+local function make_fs(data)
-	local data = pdata[name]
 	local fs = {}
 
 	fs[#fs + 1] = fmt([[
 		size[%f,%f]
 		no_prepend[]
 		bgcolor[#0000]
-	]], ROWS + (data.query_item and 6.7 or 0) - 1.2, LINES - 0.3)
+	]],
+	ROWS + (data.query_item and 6.7 or 0) - 1.2, LINES - 0.3)
 
 	if not sfinv_only then
-		fs[#fs + 1] = CORE_VERSION >= 510 and
+		fs[#fs + 1] = fmt("background9[-0.15,-0.2;%f,%f;%s;false;%d]",
-			fmt("background9[-0.15,-0.2;%f,%f;%s;false;%d]",
+			ROWS - 0.9, LINES + 0.4, PNG.bg_full, 10)
-				ROWS - 0.9, LINES + 0.4, PNG.bg_full, 10) or
-			fmt("background[-0.15,-0.2;%f,%f;%s;false]",
-				ROWS - 0.9, LINES + 0.4, PNG.bg_full)
 	end
 
 	fs[#fs + 1] = fmt([[
-		field[0.25,0.2;%f,1;filter;;%s]
+		style[filter;border=false]
+		field[0.4,0.2;2.5,1;filter;;%s]
 		field_close_on_enter[filter;false]
+		box[0,0;2.4,0.6;#ffffff25]
 	]],
-	sfinv_only and 2.76 or 2.72, ESC(data.filter))
+	ESC(data.filter))
 
-	if CORE_VERSION >= 520 then
+	fs[#fs + 1] = fmt([[
-		fs[#fs + 1] = fmt([[
+		style_type[image_button;border=false]
-			style_type[image_button;border=false]
+		style_type[item_image_button;border=false;bgimg_hovered=%s;bgimg_pressed=%s]
-			style_type[item_image_button;border=false;bgimg_hovered=%s;bgimg_pressed=%s]
+		style[search;fgimg=%s;fgimg_hovered=%s]
-			style[search;fgimg=%s;fgimg_hovered=%s]
+		style[clear;fgimg=%s;fgimg_hovered=%s]
-			style[clear;fgimg=%s;fgimg_hovered=%s]
+		style[prev_page;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]
-			style[prev_page;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]
+		style[next_page;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]
-			style[next_page;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]
+	]],
-		]],
+	PNG.selected, PNG.selected,
-		PNG.selected, PNG.selected,
+	PNG.search, PNG.search_hover,
-		PNG.search, PNG.search_hover,
+	PNG.clear, PNG.clear_hover,
-		PNG.clear, PNG.clear_hover,
+	PNG.prev, PNG.prev_hover, PNG.prev_hover,
-		PNG.prev, PNG.prev_hover, PNG.prev_hover,
+	PNG.next, PNG.next_hover, PNG.next_hover)
-		PNG.next, PNG.next_hover, PNG.next_hover)
 
-		fs[#fs + 1] = fmt(mul_elem(FMT.image_button, 4),
+	fs[#fs + 1] = fmt(mul_elem(FMT.image_button, 4),
-			sfinv_only and 2.6 or 2.54, -0.06, 0.85, 0.85, "", "search", "",
+		sfinv_only and 2.6 or 2.54, -0.06, 0.85, 0.85, "", "search", "",
-			sfinv_only and 3.3 or 3.25, -0.06, 0.85, 0.85, "", "clear", "",
+		sfinv_only and 3.3 or 3.25, -0.06, 0.85, 0.85, "", "clear", "",
-			sfinv_only and 5.45 or (ROWS * 6.83) / 11, -0.06, 0.85, 0.85, "", "prev_page", "",
+		sfinv_only and 5.45 or (ROWS * 6.83) / 11, -0.06, 0.85, 0.85, "", "prev_page", "",
-			sfinv_only and 7.2  or (ROWS * 8.75) / 11, -0.06, 0.85, 0.85, "", "next_page", "")
+		sfinv_only and 7.2  or (ROWS * 8.75) / 11, -0.06, 0.85, 0.85, "", "next_page", "")
-	else
-		fs[#fs + 1] = fmt([[
-			image_button[%f,-0.06;0.85,0.85;%s;search;;;false;%s]
-			image_button[%f,-0.06;0.85,0.85;%s;clear;;;false;%s]
-			]],
-			sfinv_only and 2.6 or 2.54, PNG.search, PNG.search_hover,
-			sfinv_only and 3.3 or 3.25, PNG.clear, PNG.clear_hover)
-
-		fs[#fs + 1] = fmt(mul_elem(FMT.arrow, 2),
-			sfinv_only and 5.45 or (ROWS * 6.83) / 11, -0.05,
-				PNG.prev, "prev_page", PNG.prev,
-			sfinv_only and 7.2 or (ROWS * 8.75) / 11, -0.05,
-				PNG.next, "next_page", PNG.next)
-	end
 
 	data.pagemax = max(1, ceil(#data.items / IPP))
 
@@ -1108,7 +1100,7 @@ local function make_formspec(name)
 		local X = i % ROWS
 		local Y = (i % IPP - X) / ROWS + 1
 
-		if CORE_VERSION >= 510 and data.query_item == item then
+		if data.query_item == item then
 			fs[#fs + 1] = fmt(FMT.image,
 				X - (X * (sfinv_only and 0.12 or 0.14)) - 0.05,
 				Y - (Y * 0.1) - 0.1,
@@ -1129,10 +1121,11 @@ local function make_formspec(name)
 end
 
 local show_fs = function(player, name)
+	local data = pdata[name]
 	if sfinv_only then
 		sfinv.set_player_inventory_formspec(player)
 	else
-		show_formspec(name, "craftguide", make_formspec(name))
+		show_formspec(name, "craftguide", make_fs(data))
 	end
 end
 
@@ -1146,16 +1139,6 @@ craftguide.register_craft_type("digging_chance", {
 	icon = "default_tool_mesepick.png",
 })
 
-local function sfind(str, filter)
-	if filter == "" then
-		return 0
-	end
-
-	if find(str, filter, 1, true) then
-		return #str - #filter
-	end
-end
-
 local function search(data)
 	local filter = data.filter
 
@@ -1177,28 +1160,30 @@ local function search(data)
 		end
 	end
 
-	local filtered_list, order, c = {}, {}, 0
+	local filtered_list, c = {}, 0
 
 	for i = 1, #data.items_raw do
 		local item = data.items_raw[i]
 		local def  = reg_items[item]
 		local desc = (def and def.description) and lower(def.description) or ""
+		local search_in = fmt("%s %s", item, desc)
 		local to_add
 
 		if search_filter then
 			for filter_name, values in pairs(filters) do
-				local func = search_filters[filter_name]
+				if values then
-				to_add = func(item, values) and (search_filter == "" or
+					local func = search_filters[filter_name]
-					(sfind(item, search_filter) or sfind(desc, search_filter)))
+					to_add = func(item, values) and (search_filter == "" or
+						find(search_in, search_filter, 1, true))
+				end
 			end
 		else
-			to_add = sfind(item, filter) or sfind(desc, filter)
+			to_add = find(search_in, filter, 1, true)
 		end
 
 		if to_add then
 			c = c + 1
 			filtered_list[c] = item
-			order[item] = to_add
 		end
 	end
 
@@ -1211,10 +1196,6 @@ local function search(data)
 		end
 	end
 
-	sort(filtered_list, function(a, b)
-		return order[a] < order[b]
-	end)
-
 	data.items = filtered_list
 end
 
@@ -1471,17 +1452,19 @@ local function get_init_items()
 		last_str = str
 	end
 
-	local full_char, empty_char = "▰", "▱"
+	local full_char, empty_char = "#", " "
 
 	for name, def in pairs(reg_items) do
 		ic = ic + 1
-		local percent, bar, len = (ic * 100) / it, "", 20
+		local percent, bar, len = (ic * 100) / it, "[", 20
 
 		for i = 1, len do
 			bar = bar .. (i <= percent / (100 / len) and full_char or empty_char)
 		end
 
-		iop(fmt("[craftguide] Caching data  %s  %u%%\r", bar, percent))
+		if enable_cache_progress_bar then
+			iop(fmt("[craftguide] Caching data  %s  %u%%\r", bar .. "]", percent))
+		end
 
 		if show_item(def) then
 			if not fuel_cache[name] then
@@ -1522,15 +1505,13 @@ local function get_init_items()
 end
 
 local function init_data(name)
-	local items = CORE_VERSION >= 500 and init_items or
-		(#init_items == 0 and get_init_items() or init_items)
-
 	pdata[name] = {
-		filter    = "",
+		filter     = "",
-		pagenum   = 1,
+		pagenum    = 1,
-		items     = items,
+		items      = init_items,
-		items_raw = items,
+		items_raw  = init_items,
-		favs      = {},
+		favs       = {},
+		fs_version = get_fs_version(name),
 	}
 end
 
@@ -1546,9 +1527,7 @@ local function reset_data(data)
 	data.items       = data.items_raw
 end
 
-if CORE_VERSION >= 500 then
+on_mods_loaded(get_init_items)
-	on_mods_loaded(get_init_items)
-end
 
 on_joinplayer(function(player)
 	local name = player:get_player_name()
@@ -1558,22 +1537,25 @@ end)
 local function fields(player, _f)
 	local name = player:get_player_name()
 	local data = pdata[name]
+	--print(dump(_f))
 
 	if _f.clear then
 		reset_data(data)
-		return true, show_fs(player, name)
 
 	elseif _f.prev_recipe or _f.next_recipe then
 		local num = data.rnum + (_f.prev_recipe and -1 or 1)
 		data.rnum = data.recipes[num] and num or (_f.prev_recipe and #data.recipes or 1)
-		return true, show_fs(player, name)
 
 	elseif _f.prev_usage or _f.next_usage then
 		local num = data.unum + (_f.prev_usage and -1 or 1)
 		data.unum = data.usages[num] and num or (_f.prev_usage and #data.usages or 1)
-		return true, show_fs(player, name)
 
-	elseif (_f.key_enter_field == "filter" or _f.search) and _f.filter ~= "" then
+	elseif _f.key_enter_field == "filter" or _f.search then
+		if _f.filter == "" then
+			reset_data(data)
+			return true, show_fs(player, name)
+		end
+
 		local str = lower(_f.filter)
 		if data.filter == str then return end
 
@@ -1581,8 +1563,6 @@ local function fields(player, _f)
 		data.pagenum = 1
 		search(data)
 
-		return true, show_fs(player, name)
-
 	elseif _f.prev_page or _f.next_page then
 		if data.pagemax == 1 then return end
 		data.pagenum = data.pagenum - (_f.prev_page and 1 or -1)
@@ -1593,8 +1573,6 @@ local function fields(player, _f)
 			data.pagenum = data.pagemax
 		end
 
-		return true, show_fs(player, name)
-
 	elseif _f.fav then
 		local fav, i = is_fav(data)
 		local total = #data.favs
@@ -1604,8 +1582,6 @@ local function fields(player, _f)
 		elseif fav then
 			remove(data.favs, i)
 		end
-
-		return true, show_fs(player, name)
 	else
 		local item
 		for field in pairs(_f) do
@@ -1619,6 +1595,8 @@ local function fields(player, _f)
 			return
 		elseif sub(item, -4) == "_inv" then
 			item = sub(item, 1, -5)
+		elseif sub(item, 1, 1) == "_" then
+			item = sub(item, 2)
 		end
 
 		item = reg_aliases[item] or item
@@ -1629,28 +1607,37 @@ local function fields(player, _f)
 			else
 				data.show_usages = not data.show_usages
 			end
+		elseif item == data.query_item then
+			return
 		end
 
 		local recipes, usages = get_recipes(item, data, player)
-		if not recipes and not usages then return end
+		if not recipes and not usages      then return end
+		if data.show_usages and not usages then return end
 
 		data.query_item = item
 		data.recipes    = recipes
 		data.usages     = usages
 		data.rnum       = 1
 		data.unum       = 1
-
-		return true, show_fs(player, name)
 	end
+
+	return true, show_fs(player, name)
 end
 
 if sfinv_only then
 	sfinv.register_page("craftguide:craftguide", {
 		title = S"Craft Guide",
 
+		is_in_nav = function(self, player, context)
+			local name = player:get_player_name()
+			return get_fs_version(name) >= FORMSPEC_MINIMAL_VERSION
+		end,
+
 		get = function(self, player, context)
 			local name = player:get_player_name()
-			local formspec = make_formspec(name)
+			local data = pdata[name]
+			local formspec = make_fs(data)
 
 			return sfinv.make_formspec(player, context, formspec)
 		end,
@@ -1678,14 +1665,28 @@ else
 
 	local function on_use(user)
 		local name = user:get_player_name()
+		local data = pdata[name]
+
+		if data.fs_version < FORMSPEC_MINIMAL_VERSION then
+			local fs = fmt([[
+				size[6.6,1.3]
+				image[0,0;1,1;%s]
+				label[1,0;%s]
+				button_exit[2.8,0.8;1,1;;OK]
+			]],
+			PNG.nothing,
+			"Your Minetest client is outdated.\n" ..
+			"Get the latest version on minetest.net to use the Crafting Guide.")
+
+			return show_formspec(name, "craftguide", fs)
+		end
 
 		if next(recipe_filters) then
-			local data = pdata[name]
 			data.items_raw = get_filtered_items(user)
 			search(data)
 		end
 
-		show_formspec(name, "craftguide", make_formspec(name))
+		show_formspec(name, "craftguide", make_fs(data))
 	end
 
 	core.register_craftitem("craftguide:book", {
@@ -1708,7 +1709,7 @@ else
 		paramtype = "light",
 		paramtype2 = "wallmounted",
 		sunlight_propagates = true,
-		groups = {oddly_breakable_by_hand = 1, flammable = 3},
+		groups = {choppy = 1, attached_node = 1, oddly_breakable_by_hand = 1, flammable = 3},
 		node_box = {
 			type = "wallmounted",
 			wall_top    = {-0.5, 0.4375, -0.5, 0.5, 0.5, 0.5},
@@ -1954,14 +1955,9 @@ if progressive_mode then
 		local name = player:get_player_name()
 		local data = pdata[name]
 
-		if CORE_VERSION >= 500 then
+		local meta = player:get_meta()
-			local meta = player:get_meta()
+		data.inv_items = dslz(meta:get_string("inv_items")) or {}
-			data.inv_items = dslz(meta:get_string("inv_items")) or {}
+		data.known_recipes = dslz(meta:get_string("known_recipes")) or 0
-			data.known_recipes = dslz(meta:get_string("known_recipes")) or 0
-		else
-			data.inv_items = dslz(player:get_attribute("inv_items")) or {}
-			data.known_recipes = dslz(player:get_attribute("known_recipes")) or 0
-		end
 
 		data.hud = {
 			bg = player:hud_add{
@@ -1984,34 +1980,22 @@ if progressive_mode then
 				hud_elem_type = "text",
 				position      = {x = 0.84, y = 1.04},
 				alignment     = {x = 1,    y = 1},
-				number        = 0xfff,
+				number        = 0xffffff,
 				text          = "",
 			},
 		}
 	end)
 
-	local to_save = {
+	local to_save = {"inv_items", "known_recipes"}
-		"inv_items",
-		"known_recipes",
-	}
 
 	local function save_meta(player)
-		local meta
+		local meta = player:get_meta()
 		local name = player:get_player_name()
 		local data = pdata[name]
 
-		if CORE_VERSION >= 500 then
-			meta = player:get_meta()
-		end
-
 		for i = 1, #to_save do
 			local meta_name = to_save[i]
-
+			meta:set_string(meta_name, slz(data[meta_name]))
-			if CORE_VERSION >= 500 then
-				meta:set_string(meta_name, slz(data[meta_name]))
-			else
-				player:set_attribute(meta_name, slz(data[meta_name]))
-			end
 		end
 	end
 

settingtypes.txt

@@ -2,4 +2,7 @@
 craftguide_progressive_mode	(Progressive Mode)	bool false
 
 # Integration in the default Minetest Game inventory.
-craftguide_sfinv_only		(Sfinv only)		bool false
+craftguide_sfinv_only		(Sfinv only)		bool false
+
+# Display the cache-building progress bar in the server console.
+craftguide_enable_cache_progress_bar	(Enable console cache progress bar)	bool true