Add init.lua

init.lua

@@ -0,0 +1,73 @@
+local members, newMembers = {}
+
+local getName = function(player) -- Find an applicable name from a string with wildcards.
+	local players = minetest.get_player_names()
+	local pattern = "^" .. player:gsub("*", ".+") .. "$"
+	
+	for _,name in ipairs(players) do
+		if name:find(pattern) then
+			return name
+		end
+	end
+	
+	return false -- If no names match, return false.
+end
+
+local append = function(arr, newItem) -- Append an item, avoiding duplicates.
+	for _,item in ipairs(arr) do
+		if item == newItem then -- If item is already in array, there is no need to add it.
+			return arr
+		end
+	end
+	arr[#arr+1] = newItem
+	return arr
+end
+
+minetest.register_chatcommand("p", {
+	params = "<players> <message>",
+	description = "Send a private message. To set recipients only, use '.p <players>'. Use commas (no spaces) to separate player names. Use an asterisk (*) to get last recipients. Wildcards are also acceptable in player names.",
+	func = function(param)
+		local players, msg = string.match(param, "^(%g+)%s?(.*)$")
+		
+		if not players then -- Reject bad input
+			minetest.display_chat_message("Invalid parameters. See '.help p'.")
+			return
+		end
+		
+		playerList = string.split(players, ",")
+		newMembers = {} -- Reset the variable
+		
+		for _,player in ipairs(playerList) do
+			if player == "*" then -- User wants to use last recipients.
+				if #members == 0 then -- Reject if there are no existing players
+					minetest.display_chat_message("No previous recipients found.")
+					return
+				else
+					for _,member in ipairs(members) do -- Insert each member from existing table
+						newMembers = append(newMembers, member)
+					end
+				end
+			elseif player:find("*") then -- Player name contains wildcards
+				local name = getName(player)
+				if not name then -- If the player was not found
+					minetest.display_chat_message("No match for player '" .. player .. "'.")
+					return
+				else
+					newMembers = append(newMembers, name)
+				end
+			else
+				newMembers = append(newMembers, player)
+			end
+		end
+		
+		members = newMembers -- Update list
+		
+		if msg and msg:len() > 0 then -- Do not send messages if no message was specified.
+			for _,member in ipairs(members) do
+				minetest.run_server_chatcommand("msg", member .. " " .. msg)
+			end
+		else
+			minetest.display_chat_message("Recipients: " .. table.concat(members, ", "))
+		end
+	end
+})