Add a client side mod dialog

builtin/mainmenu/content/pkgmgr.lua

@@ -711,6 +711,53 @@ function pkgmgr.preparemodlist(data)
 	return retval
 end
 
+function pkgmgr.prepareclientmodlist(data)
+	local retval = {}
+
+	local clientmods = {}
+
+	--read clientmods
+	local modpath = core.get_clientmodpath()
+
+	if modpath ~= nil and modpath ~= "" then
+		pkgmgr.get_mods(modpath, "clientmods", clientmods)
+	end
+
+	for i=1,#clientmods,1 do
+		clientmods[i].type = "mod"
+		clientmods[i].loc = "global"
+		clientmods[i].is_clientside = true
+		retval[#retval + 1] = clientmods[i]
+	end
+
+	--read mods configuration
+	local filename = modpath ..
+				DIR_DELIM .. "mods.conf"
+
+	local conffile = Settings(filename)
+
+	for key,value in pairs(conffile:to_table()) do
+		if key:sub(1, 9) == "load_mod_" then
+			key = key:sub(10)
+			local element = nil
+			for i=1,#retval,1 do
+				if retval[i].name == key and
+					not retval[i].is_modpack then
+					element = retval[i]
+					break
+				end
+			end
+			if element ~= nil then
+				element.enabled = value ~= "false" and value ~= "nil" and value
+			else
+				core.log("info", "Clientmod: " .. key .. " " .. dump(value) .. " but not found")
+			end
+		end
+	end
+
+	return retval
+end
+
 function pkgmgr.compare_package(a, b)
 	return a and b and a.name == b.name and a.path == b.path
 end
@@ -749,6 +796,8 @@ function pkgmgr.reload_global_mods()
 	end
 	pkgmgr.global_mods = filterlist.create(pkgmgr.preparemodlist,
 			pkgmgr.comparemod, is_equal, nil, {})
+	pkgmgr.clientmods = filterlist.create(pkgmgr.prepareclientmodlist,
+			pkgmgr.comparemod, is_equal, nil, {})
 	pkgmgr.global_mods:add_sort_mechanism("alphabetic", sort_mod_list)
 	pkgmgr.global_mods:set_sortmode("alphabetic")
 end

builtin/mainmenu/dlg_csm.lua

@@ -0,0 +1,193 @@
+--Minetest
+--Copyright (C) 2025 ProunceDev <[email protected]>
+--
+--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.
+
+local packages_raw, packages, tab_selected_pkg
+
+local function modname_valid(name)
+	return not name:find("[^a-z0-9_]")
+end
+
+local function get_formspec(dlgview, name, tabdata)
+	if pkgmgr.clientmods == nil then
+		pkgmgr.reload_global_mods()
+	end
+
+	if packages == nil then
+		packages_raw = {}
+		table.insert_all(packages_raw, pkgmgr.clientmods:get_list())
+
+		local function get_data()
+			return packages_raw
+		end
+
+		local function is_equal(element, uid) --uid match
+			return (element.type == "game" and element.id == uid) or
+					element.name == uid
+		end
+
+		packages = filterlist.create(get_data, pkgmgr.compare_package, is_equal, nil, {})
+
+		local filename = core.get_clientmodpath() .. DIR_DELIM .. "mods.conf"
+		local conffile = Settings(filename)
+		local mods = conffile:to_table()
+
+		for i = 1, #packages_raw do
+			local mod = packages_raw[i]
+			if mod.is_clientside then
+				if modname_valid(mod.name) then
+					conffile:set("load_mod_" .. mod.name,
+						mod.enabled and "true" or "false")
+				elseif mod.enabled then
+					gamedata.errormessage = fgettext_ne("Failed to enable clientmod" ..
+						" \"$1\" as it contains disallowed characters. " ..
+						"Only characters [a-z0-9_] are allowed.",
+						mod.name)
+				end
+				mods["load_mod_" .. mod.name] = nil
+			end
+		end
+
+		-- Remove mods that are not present anymore
+		for key in pairs(mods) do
+			if key:sub(1, 9) == "load_mod_" then
+				conffile:remove(key)
+			end
+		end
+		if not conffile:write() then
+			core.log("error", "Failed to write clientmod config file")
+		end
+	end
+
+	if tab_selected_pkg == nil then
+		tab_selected_pkg = 1
+	end
+
+	local use_technical_names = core.settings:get_bool("show_technical_names")
+
+
+	local fs = {
+		"size[6.5,7]",
+		"label[0.25,-0.1;", fgettext("Installed Client Mods"), "]",
+		"tablecolumns[color;tree;text]",
+		"table[0.15,0.5;6,5.7;pkglist;", pkgmgr.render_packagelist(packages, use_technical_names), ";", tab_selected_pkg, "]",
+		"button[0.15,5.5;3,3;back;", fgettext("Back"), "]"
+	}
+
+
+	local selected_pkg
+	if filterlist.size(packages) >= tab_selected_pkg then
+		selected_pkg = packages:get_list()[tab_selected_pkg]
+	end
+
+	if selected_pkg ~= nil then
+		if selected_pkg.type == "mod" then
+			if selected_pkg.is_clientside then
+				if selected_pkg.enabled then
+					table.insert_all(fs, {
+						"button[3.36,5.5;3,3;btn_csm_mgr_disable_mod;", fgettext("Disable"), "]"
+					})
+				else
+					table.insert_all(fs, {
+						"button[3.36,5.5;3,3;btn_csm_mgr_enable_mod;", fgettext("Enable"), "]"
+					})
+				end
+			end
+		end
+	end
+	return table.concat(fs, "")
+end
+
+--------------------------------------------------------------------------------
+local function handle_doubleclick(pkg, pkg_name)
+	pkgmgr.enable_mod({data = {list = packages, selected_mod = pkg_name}})
+	packages = nil
+end
+
+--------------------------------------------------------------------------------
+local function handle_buttons(dlgview, fields, tabname, tabdata)
+	if fields["pkglist"] ~= nil then
+		local event = core.explode_table_event(fields["pkglist"])
+		tab_selected_pkg = event.row
+		if event.type == "DCL" then
+			handle_doubleclick(packages:get_list()[tab_selected_pkg], tab_selected_pkg)
+		end
+		return true
+	end
+
+	if fields.btn_csm_mgr_mp_enable ~= nil or fields.btn_csm_mgr_mp_disable ~= nil then
+		pkgmgr.enable_mod({data = {list = packages, selected_mod = tab_selected_pkg}}, fields.btn_csm_mgr_mp_enable ~= nil)
+		packages = nil
+		return true
+	end
+
+	if fields.btn_csm_mgr_enable_mod ~= nil or fields.btn_csm_mgr_disable_mod ~= nil then
+		pkgmgr.enable_mod({data = {list = packages, selected_mod = tab_selected_pkg}}, fields.btn_csm_mgr_enable_mod ~= nil)
+		packages = nil
+		return true
+	end
+
+	if fields.back then
+		dlgview:delete()
+		return true
+	end
+
+	if fields["btn_csm_mgr_rename_modpack"] ~= nil then
+		local mod = packages:get_list()[tab_selected_pkg]
+		local dlg_renamemp = create_rename_modpack_dlg(mod)
+		dlg_renamemp:set_parent(dlgview)
+		dlgview:hide()
+		dlg_renamemp:show()
+		packages = nil
+		return true
+	end
+
+	if fields["btn_csm_mgr_delete_mod"] ~= nil then
+		local mod = packages:get_list()[tab_selected_pkg]
+		local dlg_delmod = create_delete_content_dlg(mod)
+		dlg_delmod:set_parent(dlgview)
+		dlgview:hide()
+		dlg_delmod:show()
+		packages = nil
+		return true
+	end
+
+	if fields.btn_csm_mgr_use_txp or fields.btn_csm_mgr_disable_txp then
+		local txp_path = ""
+		if fields.btn_csm_mgr_use_txp then
+			txp_path = packages:get_list()[tab_selected_pkg].path
+		end
+
+		core.settings:set("texture_path", txp_path)
+		packages = nil
+
+		mm_game_theme.init()
+		mm_game_theme.reset()
+		return true
+	end
+
+	return false
+end
+
+function create_csm_dlg()
+	mm_game_theme.set_engine()
+	return dialog_create(
+						"csm",
+						get_formspec,
+						handle_buttons,
+						pkgmgr.update_gamelist
+						)
+end

builtin/mainmenu/init.lua

@@ -57,6 +57,7 @@ dofile(menupath .. DIR_DELIM .. "dlg_version_info.lua")
 dofile(menupath .. DIR_DELIM .. "dlg_reinstall_mtg.lua")
 dofile(menupath .. DIR_DELIM .. "dlg_clients_list.lua")
 dofile(menupath .. DIR_DELIM .. "dlg_server_list_mods.lua")
+dofile(menupath .. DIR_DELIM .. "dlg_csm.lua")
 
 local tabs = {
 	content  = dofile(menupath .. DIR_DELIM .. "tab_content.lua"),

builtin/mainmenu/tab_content.lua

@@ -88,7 +88,8 @@ local function get_formspec(tabview, name, tabdata)
 		pkgmgr.render_packagelist(packages, use_technical_names, update_icons),
 		";", tabdata.selected_pkg, "]",
 
-		"button[0.4,5.8;6.3,0.9;btn_contentdb;", contentdb_label, "]"
+		"button[0.4,5.8;3.1,0.9;btn_contentdb;", contentdb_label, "]",
+		"button[3.6,5.8;3.1,0.9;btn_csm;", fgettext("Client side mods"), "]"
 	}
 
 	local selected_pkg
@@ -229,6 +230,14 @@ local function handle_buttons(tabview, fields, tabname, tabdata)
 		return true
 	end
 
+	if fields.btn_csm then
+		local dlg = create_csm_dlg()
+		dlg:set_parent(tabview)
+		tabview:hide()
+		dlg:show()
+		return true
+	end
+
 	if fields.btn_mod_mgr_rename_modpack then
 		local mod = packages:get_list()[tabdata.selected_pkg]
 		local dlg_renamemp = create_rename_modpack_dlg(mod)

src/script/scripting_mainmenu.cpp

@@ -95,6 +95,8 @@ bool MainMenuScripting::mayModifyPath(const std::string &path)
 		return true;
 	if (fs::PathStartsWith(path, path_user + DIR_DELIM "worlds"))
 		return true;
+	if (fs::PathStartsWith(path, path_user + DIR_DELIM "clientmods"))
+		return true;
 
 	if (fs::PathStartsWith(path, fs::AbsolutePathPartial(porting::path_cache)))
 		return true;