Notify users to reinstall MTG if worlds exist (#13850)

builtin/mainmenu/dlg_reinstall_mtg.lua

@@ -0,0 +1,114 @@
+--Minetest
+--Copyright (C) 2023 Gregor Parzefall
+--
+--This program is free software; you can redistribute it and/or modify
+--it under the terms of the GNU Lesser General Public License as published by
+--the Free Software Foundation; either version 2.1 of the License, or
+--(at your option) any later version.
+--
+--This program is distributed in the hope that it will be useful,
+--but WITHOUT ANY WARRANTY; without even the implied warranty of
+--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--GNU Lesser General Public License for more details.
+--
+--You should have received a copy of the GNU Lesser General Public License along
+--with this program; if not, write to the Free Software Foundation, Inc.,
+--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+function check_reinstall_mtg()
+	if core.settings:get_bool("no_mtg_notification") 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)
+			return
+		end
+	end
+
+	local mtg_world_found = false
+	local worlds = core.get_worlds()
+	for _, world in ipairs(worlds) do
+		if world.gameid == "minetest" then
+			mtg_world_found = true
+			break
+		end
+	end
+	if not mtg_world_found then
+		core.settings:set_bool("no_mtg_notification", true)
+		return
+	end
+
+	mm_game_theme.reset()
+
+	local maintab = ui.find_by_name("maintab")
+
+	local dlg = create_reinstall_mtg_dlg()
+	dlg:set_parent(maintab)
+	maintab:hide()
+	dlg:show()
+	ui.update()
+end
+
+local function get_formspec(dialogdata)
+	local markup = table.concat({
+		"<big>", fgettext("Minetest Game is no longer installed by default"), "</big>\n",
+		fgettext("For a long time, the Minetest engine shipped with a default game called \"Minetest Game\". " ..
+				"Since Minetest 5.8.0, Minetest ships without a default game."), "\n",
+		fgettext("If you want to continue playing in your Minetest Game worlds, you need to reinstall Minetest Game."),
+	})
+
+	return table.concat({
+		"formspec_version[6]",
+		"size[12.8,7]",
+		"hypertext[0.375,0.375;12.05,5.2;text;", minetest.formspec_escape(markup), "]",
+		"container[0.375,5.825]",
+		"style[dismiss;bgcolor=red]",
+		"button[0,0;4,0.8;dismiss;", fgettext("Dismiss"), "]",
+		"button[4.25,0;8,0.8;reinstall;", fgettext("Reinstall Minetest Game"), "]",
+		"container_end[]",
+	})
+end
+
+local function buttonhandler(this, fields)
+	if fields.reinstall then
+		-- Don't set "no_mtg_notification" here so that the dialog will be shown
+		-- again if downloading MTG fails for whatever reason.
+		this:delete()
+
+		local maintab = ui.find_by_name("maintab")
+
+		local dlg = create_store_dlg(nil, { author = "Minetest", name = "minetest_game" })
+		dlg:set_parent(maintab)
+		maintab:hide()
+		dlg:show()
+
+		return true
+	end
+
+	if fields.dismiss then
+		core.settings:set_bool("no_mtg_notification", true)
+		this:delete()
+		return true
+	end
+end
+
+local function eventhandler(event)
+	if event == "MenuQuit" then
+		-- Don't allow closing the dialog with ESC, but still allow exiting
+		-- Minetest.
+		core.close()
+		return true
+	end
+	return false
+end
+
+function create_reinstall_mtg_dlg()
+	local dlg = dialog_create("dlg_reinstall_mtg", get_formspec,
+			buttonhandler, eventhandler)
+	return dlg
+end
+
+