Add basic command block

mods/redstone/mesecons_commandblock/depends.txt

@@ -0,0 +1,3 @@
+mesecons
+doc?
+doc_items?

mods/redstone/mesecons_commandblock/init.lua

@@ -0,0 +1,207 @@
+minetest.register_chatcommand("say", {
+	params = "<text>",
+	description = "Say <text> as the server",
+	privs = {server=true},
+	func = function(name, param)
+		minetest.chat_send_all(name .. ": " .. param)
+	end
+})
+
+minetest.register_chatcommand("tell", {
+	params = "<name> <text>",
+	description = "Say <text> to <name> privately",
+	func = function(name, param)
+		local found, _, target, message = param:find("^([^%s]+)%s+(.*)$")
+		if found == nil then
+			minetest.chat_send_player(name, "Invalid usage: " .. param)
+			return
+		end
+		if not minetest.get_player_by_name(target) then
+			minetest.chat_send_player(name, "Invalid target: " .. target)
+		end
+		minetest.chat_send_player(target, name .. " whispers: " .. message, false)
+	end
+})
+
+minetest.register_chatcommand("hp", {
+	params = "<name> <value>",
+	description = "Set health of <name> to <value> hitpoints",
+	privs = {ban=true},
+	func = function(name, param)
+		local found, _, target, value = param:find("^([^%s]+)%s+(%d+)$")
+		if found == nil then
+			minetest.chat_send_player(name, "Invalid usage: " .. param)
+			return
+		end
+		local player = minetest.get_player_by_name(target)
+		if player then
+			player:set_hp(value)
+		else
+			minetest.chat_send_player(name, "Invalid target: " .. target)
+		end
+	end
+})
+
+local function initialize_data(meta)
+	local commands = minetest.formspec_escape(meta:get_string("commands"))
+	meta:set_string("formspec",
+		"invsize[9,5;]" ..
+		"textarea[0.5,0.5;8.5,4;commands;Commands;"..commands.."]" ..
+		"label[1,3.8;@nearest, @farthest, and @random are replaced by the respective player names]" ..
+		"button_exit[3.3,4.5;2,1;submit;Submit]")
+	local owner = meta:get_string("owner")
+	if owner == "" then
+		owner = "not owned"
+	else
+		owner = "owned by " .. owner
+	end
+	meta:set_string("infotext", "Command Block\n" ..
+		"(" .. owner .. ")\n" ..
+		"Commands: "..commands)
+end
+
+local function construct(pos)
+	local meta = minetest.get_meta(pos)
+
+	meta:set_string("commands", "tell @nearest Commandblock unconfigured")
+
+	meta:set_string("owner", "")
+
+	initialize_data(meta)
+end
+
+local function after_place(pos, placer)
+	if placer then
+		local meta = minetest.get_meta(pos)
+		meta:set_string("owner", placer:get_player_name())
+		initialize_data(meta)
+	end
+end
+
+local function receive_fields(pos, formname, fields, sender)
+	if not fields.submit then
+		return
+	end
+	local meta = minetest.get_meta(pos)
+	local owner = meta:get_string("owner")
+	if owner ~= "" and sender:get_player_name() ~= owner then
+		return
+	end
+	meta:set_string("commands", fields.commands)
+
+	initialize_data(meta)
+end
+
+local function resolve_commands(commands, pos)
+	local players = minetest.get_connected_players()
+
+	-- No players online: remove all commands containing
+	-- @nearest, @farthest and @random
+	if #players == 0 then
+		commands = commands:gsub("[^\r\n]+", function (line)
+			if line:find("@nearest") then return "" end
+			if line:find("@farthest") then return "" end
+			if line:find("@random") then return "" end
+			return line
+		end)
+		return commands
+	end
+
+	local nearest, farthest = nil, nil
+	local min_distance, max_distance = math.huge, -1
+	for index, player in pairs(players) do
+		local distance = vector.distance(pos, player:getpos())
+		if distance < min_distance then
+			min_distance = distance
+			nearest = player:get_player_name()
+		end
+		if distance > max_distance then
+			max_distance = distance
+			farthest = player:get_player_name()
+		end
+	end
+	local random = players[math.random(#players)]:get_player_name()
+	commands = commands:gsub("@nearest", nearest)
+	commands = commands:gsub("@farthest", farthest)
+	commands = commands:gsub("@random", random)
+	return commands
+end
+
+local function commandblock_action_on(pos, node)
+	if node.name ~= "mesecons_commandblock:commandblock_off" then
+		return
+	end
+
+	minetest.swap_node(pos, {name = "mesecons_commandblock:commandblock_on"})
+
+	local meta = minetest.get_meta(pos)
+	local owner = meta:get_string("owner")
+	if owner == "" then
+		return
+	end
+
+	local commands = resolve_commands(meta:get_string("commands"), pos)
+	for _, command in pairs(commands:split("\n")) do
+		local pos = command:find(" ")
+		local cmd, param = command, ""
+		if pos then
+			cmd = command:sub(1, pos - 1)
+			param = command:sub(pos + 1)
+		end
+		local cmddef = minetest.chatcommands[cmd]
+		if not cmddef then
+			minetest.chat_send_player(owner, "The command "..cmd.." does not exist")
+			return
+		end
+		local has_privs, missing_privs = minetest.check_player_privs(owner, cmddef.privs)
+		if not has_privs then
+			minetest.chat_send_player(owner, "You don't have permission "
+					.."to run "..cmd
+					.." (missing privileges: "
+					..table.concat(missing_privs, ", ")..")")
+			return
+		end
+		cmddef.func(owner, param)
+	end
+end
+
+local function commandblock_action_off(pos, node)
+	if node.name == "mesecons_commandblock:commandblock_on" then
+		minetest.swap_node(pos, {name = "mesecons_commandblock:commandblock_off"})
+	end
+end
+
+local function can_dig(pos, player)
+	local meta = minetest.get_meta(pos)
+	local owner = meta:get_string("owner")
+	return owner == "" or owner == player:get_player_name()
+end
+
+minetest.register_node("mesecons_commandblock:commandblock_off", {
+	description = "Command Block",
+	tiles = {"jeija_commandblock_off.png"},
+	inventory_image = minetest.inventorycube("jeija_commandblock_off.png"),
+	groups = {cracky=2, mesecon_effector_off=1},
+	on_construct = construct,
+	after_place_node = after_place,
+	on_receive_fields = receive_fields,
+	can_dig = can_dig,
+	sounds = default.node_sound_stone_defaults(),
+	mesecons = {effector = {
+		action_on = commandblock_action_on
+	}},
+})
+
+minetest.register_node("mesecons_commandblock:commandblock_on", {
+	tiles = {"jeija_commandblock_on.png"},
+	groups = {mesecon_effector_on=1, not_in_creative_inventory=1},
+	drop = "mesecons_commandblock:commandblock_off",
+	on_construct = construct,
+	after_place_node = after_place,
+	on_receive_fields = receive_fields,
+	can_dig = can_dig,
+	sounds = default.node_sound_stone_defaults(),
+	mesecons = {effector = {
+		action_off = commandblock_action_off
+	}}
+})