[CSM] Add client-sided chat commands (#5092)

builtin/client/chatcommands.lua

@@ -0,0 +1,28 @@
+-- Minetest: builtin/client/chatcommands.lua
+
+
+core.register_on_sending_chat_messages(function(message)
+	if not (message:sub(1,1) == "/") then
+		return false
+	end
+	
+	core.display_chat_message("issued command: " .. message)
+	
+	local cmd, param = string.match(message, "^/([^ ]+) *(.*)")
+	if not param then
+		param = ""
+	end
+	
+	local cmd_def = core.registered_chatcommands[cmd]
+	
+	if cmd_def then
+		core.set_last_run_mod(cmd_def.mod_origin)
+		local success, message = cmd_def.func(param)
+		if message then
+			core.display_chat_message(message)
+		end
+		return true
+	end
+	
+	return false
+end)

builtin/client/init.lua

@@ -1,6 +1,7 @@
 -- Minetest: builtin/client/init.lua
 local scriptpath = core.get_builtin_path()..DIR_DELIM
 local clientpath = scriptpath.."client"..DIR_DELIM
+local commonpath = scriptpath.."common"..DIR_DELIM
 
 dofile(clientpath .. "register.lua")
 dofile(clientpath .. "preview.lua")

builtin/client/preview.lua

@@ -22,3 +22,10 @@ end)
 core.register_on_damage_taken(function(hp)
 	print("[PREVIEW] Damage taken " .. hp)
 end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_chatcommand("dump", {
+	func = function(name, param)
+		return true, dump(_G)
+	end,
+})