Move values the mainmenu caches to dedicated file(s)

builtin/mainmenu/common.lua

@@ -18,6 +18,26 @@
 -- Global menu data
 menudata = {}
 
+-- located in user cache path, for remembering this like e.g. last update check
+cache_settings = Settings(core.get_cache_path() .. DIR_DELIM .. "common.conf")
+
+--- Checks if the given key contains a timestamp less than a certain age.
+--- Pair this with a call to `cache_settings:set(key, tostring(os.time()))`
+--- after successfully refreshing the cache.
+--- @param key Name of entry in cache_settings
+--- @param max_age Age to check against, in seconds
+--- @return true if the max age is not reached
+function check_cache_age(key, max_age)
+	local time_now = os.time()
+	local time_checked = tonumber(cache_settings:get(key)) or 0
+	return time_now - time_checked < max_age
+end
+
+function core.on_before_close()
+	-- called before the menu is closed, either exit or to join a game
+	cache_settings:write()
+end
+
 -- Local cached values
 local min_supp_proto, max_supp_proto
 
@@ -27,6 +47,16 @@ function common_update_cached_supp_proto()
 end
 common_update_cached_supp_proto()
 
+-- Other global functions
+
+function core.sound_stop(handle, ...)
+	return handle:stop(...)
+end
+
+function os.tmpname()
+	error('do not use') -- instead: core.get_temp_path()
+end
+
 -- Menu helper functions
 
 local function render_client_count(n)
@@ -140,11 +170,6 @@ function render_serverlist_row(spec)
 
 	return table.concat(details, ",")
 end
----------------------------------------------------------------------------------
-os.tmpname = function()
-	error('do not use') -- instead use core.get_temp_path()
-end
---------------------------------------------------------------------------------
 
 function menu_render_worldlist()
 	local retval = {}

builtin/mainmenu/content/update_detector.lua

@@ -26,13 +26,23 @@ if not core.get_http_api then
 end
 
 
+assert(core.create_dir(core.get_cache_path() .. DIR_DELIM .. "cdb"))
+local cache_file_path = core.get_cache_path() .. DIR_DELIM .. "cdb" .. DIR_DELIM .. "updates.json"
 local has_fetched = false
 local latest_releases
 do
-	local tmp = core.get_once("cdb_latest_releases")
-	if tmp then
-		latest_releases = core.deserialize(tmp, true)
-		has_fetched = latest_releases ~= nil
+	if check_cache_age("cdb_updates_last_checked", 3 * 3600) then
+		local f = io.open(cache_file_path, "r")
+		local data = ""
+		if f then
+			data = f:read("*a")
+			f:close()
+		end
+		data = data ~= "" and core.parse_json(data) or nil
+		if type(data) == "table" then
+			latest_releases = data
+			has_fetched = true
+		end
 	end
 end
 
@@ -97,7 +107,8 @@ local function fetch()
 			return
 		end
 		latest_releases = lowercase_keys(releases)
-		core.set_once("cdb_latest_releases", core.serialize(latest_releases))
+		core.safe_file_write(cache_file_path, core.write_json(latest_releases))
+		cache_settings:set("cdb_updates_last_checked", tostring(os.time()))
 
 		if update_detector.get_count() > 0 then
 			local maintab = ui.find_by_name("maintab")

builtin/mainmenu/dlg_reinstall_mtg.lua

@@ -15,15 +15,30 @@
 --with this program; if not, write to the Free Software Foundation, Inc.,
 --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
+---- IMPORTANT ----
+-- This whole file can be removed after a while.
+-- It was only directly useful for upgrades from 5.7.0 to 5.8.0, but
+-- maybe some odd fellow directly upgrades from 5.6.1 to 5.9.0 in the future...
+-- see <https://github.com/minetest/minetest/pull/13850> in case it's not obvious
+---- ----
+
+local SETTING_NAME = "no_mtg_notification"
+
 function check_reinstall_mtg()
-	if core.settings:get_bool("no_mtg_notification") then
+	-- used to be in minetest.conf
+	if core.settings:get_bool(SETTING_NAME) then
+		cache_settings:set_bool(SETTING_NAME, true)
+		core.settings:remove(SETTING_NAME)
+	end
+
+	if cache_settings:get_bool(SETTING_NAME) then
 		return
 	end
 
 	local games = core.get_games()
 	for _, game in ipairs(games) do
 		if game.id == "minetest" then
-			core.settings:set_bool("no_mtg_notification", true)
+			cache_settings:set_bool(SETTING_NAME, true)
 			return
 		end
 	end
@@ -37,7 +52,7 @@ function check_reinstall_mtg()
 		end
 	end
 	if not mtg_world_found then
-		core.settings:set_bool("no_mtg_notification", true)
+		cache_settings:set_bool(SETTING_NAME, true)
 		return
 	end
 
@@ -87,7 +102,7 @@ local function buttonhandler(this, fields)
 	end
 
 	if fields.dismiss then
-		core.settings:set_bool("no_mtg_notification", true)
+		cache_settings:set_bool("no_mtg_notification", true)
 		this:delete()
 		return true
 	end

builtin/mainmenu/dlg_version_info.lua

@@ -51,12 +51,13 @@ end
 local function version_info_buttonhandler(this, fields)
 	if fields.version_check_remind then
 		-- Erase last known, user will be reminded again at next check
-		core.settings:set("update_last_known", "")
+		cache_settings:set("update_last_known", "")
 		this:delete()
 		return true
 	end
 	if fields.version_check_never then
-		core.settings:set("update_last_checked", "disabled")
+		-- clear checked URL
+		core.settings:set("update_information_url", "")
 		this:delete()
 		return true
 	end
@@ -116,7 +117,7 @@ local function on_version_info_received(json)
 		return
 	end
 
-	local known_update = tonumber(core.settings:get("update_last_known")) or 0
+	local known_update = tonumber(cache_settings:get("update_last_known")) or 0
 
 	-- Format: MMNNPPP (Major, Minor, Patch)
 	local new_number = type(json.latest) == "table" and json.latest.version_code
@@ -135,7 +136,7 @@ local function on_version_info_received(json)
 		return
 	end
 
-	core.settings:set("update_last_known", tostring(new_number))
+	cache_settings:set("update_last_known", tostring(new_number))
 
 	-- Show version info dialog (once)
 	maintab:hide()
@@ -149,20 +150,20 @@ end
 
 function check_new_version()
 	local url = core.settings:get("update_information_url")
-	if core.settings:get("update_last_checked") == "disabled" or
-			url == "" then
+	if url == "" then
 		-- Never show any updates
 		return
 	end
 
-	local time_now = os.time()
-	local time_checked = tonumber(core.settings:get("update_last_checked")) or 0
-	if time_now - time_checked < 2 * 24 * 3600 then
-		-- Check interval of 2 entire days
+	-- every 2 days
+	if check_cache_age("update_last_checked", 2 * 24 * 3600) then
 		return
 	end
+	cache_settings:set("update_last_checked", tostring(os.time()))
 
-	core.settings:set("update_last_checked", tostring(time_now))
+	-- Clean old leftovers (this can be removed after 5.9.0 or so)
+	core.settings:remove("update_last_checked")
+	core.settings:remove("update_last_known")
 
 	core.handle_async(function(params)
 		local http = core.get_http_api()

builtin/mainmenu/init.lua

@@ -28,8 +28,6 @@ local basepath = core.get_builtin_path()
 defaulttexturedir = core.get_texturepath_share() .. DIR_DELIM .. "base" ..
 					DIR_DELIM .. "pack" .. DIR_DELIM
 
-dofile(menupath .. DIR_DELIM .. "misc.lua")
-
 dofile(basepath .. "common" .. DIR_DELIM .. "filterlist.lua")
 dofile(basepath .. "fstk" .. DIR_DELIM .. "buttonbar.lua")
 dofile(basepath .. "fstk" .. DIR_DELIM .. "dialog.lua")

builtin/mainmenu/serverlistmgr.lua

@@ -17,7 +17,7 @@
 
 serverlistmgr = {
 	-- continent code we detected for ourselves
-	my_continent = core.get_once("continent"),
+	my_continent = nil,
 
 	-- list of locally favorites servers
 	favorites = nil,
@@ -26,6 +26,15 @@ serverlistmgr = {
 	servers = nil,
 }
 
+do
+	if check_cache_age("geoip_last_checked", 3600) then
+		local tmp = cache_settings:get("geoip") or ""
+		if tmp:match("^[A-Z][A-Z]$") then
+			serverlistmgr.my_continent = tmp
+		end
+	end
+end
+
 --------------------------------------------------------------------------------
 -- Efficient data structure for normalizing arbitrary scores attached to objects
 -- e.g. {{"a", 3.14}, {"b", 3.14}, {"c", 20}, {"d", 0}}
@@ -112,6 +121,22 @@ local public_downloading = false
 local geoip_downloading = false
 
 --------------------------------------------------------------------------------
+local function fetch_geoip()
+	local http = core.get_http_api()
+	local url = core.settings:get("serverlist_url") .. "/geoip"
+
+	local response = http.fetch_sync({ url = url })
+	if not response.succeeded then
+		return
+	end
+
+	local retval = core.parse_json(response.data)
+	if type(retval) ~= "table" then
+		return
+	end
+	return type(retval.continent) == "string" and retval.continent
+end
+
 function serverlistmgr.sync()
 	if not serverlistmgr.servers then
 		serverlistmgr.servers = {{
@@ -129,44 +154,31 @@ function serverlistmgr.sync()
 		return
 	end
 
-	-- only fetched once per MT instance
 	if not serverlistmgr.my_continent and not geoip_downloading then
 		geoip_downloading = true
-		core.handle_async(
-			function(param)
-				local http = core.get_http_api()
-				local url = core.settings:get("serverlist_url") .. "/geoip"
-
-				local response = http.fetch_sync({ url = url })
-				if not response.succeeded then
-					return
-				end
-
-				local retval = core.parse_json(response.data)
-				return retval and type(retval.continent) == "string" and retval.continent
-			end,
-			nil,
-			function(result)
-				geoip_downloading = false
-				if not result then
-					return
-				end
-				serverlistmgr.my_continent = result
-				core.set_once("continent", result)
-				-- reorder list if we already have it
-				if serverlistmgr.servers then
-					serverlistmgr.servers = order_server_list(serverlistmgr.servers)
-					core.event_handler("Refresh")
-				end
+		core.handle_async(fetch_geoip, nil, function(result)
+			geoip_downloading = false
+			if not result then
+				return
+			end
+			serverlistmgr.my_continent = result
+			cache_settings:set("geoip", result)
+			cache_settings:set("geoip_last_checked", tostring(os.time()))
+
+			-- re-sort list if applicable
+			if serverlistmgr.servers then
+				serverlistmgr.servers = order_server_list(serverlistmgr.servers)
+				core.event_handler("Refresh")
 			end
-		)
+		end)
 	end
 
 	if public_downloading then
 		return
 	end
 	public_downloading = true
 
+	-- note: this isn't cached because it's way too dynamic
 	core.handle_async(
 		function(param)
 			local http = core.get_http_api()

builtin/mainmenu/tests/serverlistmgr_spec.lua

@@ -1,5 +1,6 @@
-_G.core = {get_once = function(_) end}
+_G.core = {}
 _G.unpack = table.unpack
+_G.check_cache_age = function() return false end
 _G.serverlistmgr = {}
 
 dofile("builtin/common/vector.lua")

builtin/settingtypes.txt

@@ -772,6 +772,7 @@ serverlist_url (Serverlist URL) string servers.minetest.net
 enable_split_login_register (Enable split login/register) bool true
 
 #    URL to JSON file which provides information about the newest Minetest release
+#    If this is empty the engine will never check for updates.
 update_information_url (Update information URL) string https://www.minetest.net/release_info.json
 
 [*Server]
@@ -2287,20 +2288,6 @@ show_advanced (Show advanced settings) bool false
 #    Changing this setting requires a restart.
 enable_sound (Sound) bool true
 
-#    Unix timestamp (integer) of when the client last checked for an update
-#    Set this value to "disabled" to never check for updates.
-update_last_checked (Last update check) string
-
-#    Version number which was last seen during an update check.
-#
-#    Representation: MMMIIIPPP, where M=Major, I=Minor, P=Patch
-#    Ex: 5.5.0 is 005005000
-update_last_known (Last known version update) int 0
-
-#    If this is set to true, the user will never (again) be shown the
-#    "reinstall Minetest Game" notification.
-no_mtg_notification (Don't show "reinstall Minetest Game" notification) bool false
-
 #    Key for moving the player forward.
 keymap_forward (Forward key) key KEY_KEY_W
 

doc/menu_lua_api.md

@@ -55,10 +55,6 @@ Functions
   * Android only. Shares file using the share popup
 * `core.get_version()` (possible in async calls)
   * returns current core version
-* `core.set_once(key, value)`:
-  * save a string value that persists even if menu is closed
-* `core.get_once(key)`:
-  * get a string value saved by above function, or `nil`
 
 
 

src/defaultsettings.cpp

@@ -355,11 +355,10 @@ void set_default_settings()
 	settings->setDefault("contentdb_flag_blacklist", "nonfree, desktop_default");
 #endif
 
-	settings->setDefault("update_information_url", "https://www.minetest.net/release_info.json");
 #if ENABLE_UPDATE_CHECKER
-	settings->setDefault("update_last_checked", "");
+	settings->setDefault("update_information_url", "https://www.minetest.net/release_info.json");
 #else
-	settings->setDefault("update_last_checked", "disabled");
+	settings->setDefault("update_information_url", "");
 #endif
 
 	// Server