310 lines
12 KiB
Lua
310 lines
12 KiB
Lua
local S = minetest.get_translator("mesecons_commandblock")
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local F = minetest.formspec_escape
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local function construct(pos)
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local meta = minetest.get_meta(pos)
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meta:set_string("commands", "")
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meta:set_string("commander", "")
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end
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local function after_place(pos, placer)
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if placer then
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local meta = minetest.get_meta(pos)
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meta:set_string("commander", placer:get_player_name())
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end
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end
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local function resolve_commands(commands, pos)
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local players = minetest.get_connected_players()
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local meta = minetest.get_meta(pos)
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local commander = meta:get_string("commander")
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-- A non-printable character used while replacing “@@”.
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local SUBSTITUTE_CHARACTER = '\26' -- ASCII SUB
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-- No players online: remove all commands containing
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-- problematic placeholders.
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if #players == 0 then
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commands = commands:gsub("[^\r\n]+", function (line)
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line = line:gsub("@@", SUBSTITUTE_CHARACTER)
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if line:find("@n") then return "" end
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if line:find("@p") then return "" end
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if line:find("@f") then return "" end
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if line:find("@r") then return "" end
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line = line:gsub("@c", commander)
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line = line:gsub(SUBSTITUTE_CHARACTER, "@")
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return line
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end)
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return commands
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end
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local nearest, farthest = nil, nil
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local min_distance, max_distance = math.huge, -1
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for index, player in pairs(players) do
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local distance = vector.distance(pos, player:get_pos())
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if distance < min_distance then
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min_distance = distance
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nearest = player:get_player_name()
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end
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if distance > max_distance then
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max_distance = distance
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farthest = player:get_player_name()
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end
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end
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local random = players[math.random(#players)]:get_player_name()
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commands = commands:gsub("@@", SUBSTITUTE_CHARACTER)
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commands = commands:gsub("@p", nearest)
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commands = commands:gsub("@n", nearest)
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commands = commands:gsub("@f", farthest)
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commands = commands:gsub("@r", random)
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commands = commands:gsub("@c", commander)
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commands = commands:gsub(SUBSTITUTE_CHARACTER, "@")
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return commands
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end
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local function check_commands(commands, player_name)
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for _, command in pairs(commands:split("\n")) do
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local pos = command:find(" ")
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local cmd, param = command, ""
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if pos then
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cmd = command:sub(1, pos - 1)
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end
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local cmddef = minetest.chatcommands[cmd]
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if not cmddef then
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-- Invalid chat command
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local msg = S("Error: The command “@1” does not exist; your command block has not been changed. Use the “help” chat command for a list of available commands.", cmd)
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if string.sub(cmd, 1, 1) == "/" then
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msg = S("Error: The command “@1” does not exist; your command block has not been changed. Use the “help” chat command for a list of available commands. Hint: Try to remove the leading slash.", cmd)
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end
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return false, minetest.colorize("#FF0000", msg)
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end
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if player_name then
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local player_privs = minetest.get_player_privs(player_name)
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for cmd_priv, _ in pairs(cmddef.privs) do
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if player_privs[cmd_priv] ~= true then
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local msg = S("Error: You have insufficient privileges to use the command “@1” (missing privilege: @2)! The command block has not been changed.", cmd, cmd_priv)
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return false, minetest.colorize("#FF0000", msg)
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end
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end
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end
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end
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return true
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end
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local function commandblock_action_on(pos, node)
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if node.name ~= "mesecons_commandblock:commandblock_off" then
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return
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end
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minetest.swap_node(pos, {name = "mesecons_commandblock:commandblock_on"})
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local meta = minetest.get_meta(pos)
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local commands = resolve_commands(meta:get_string("commands"), pos)
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for _, command in pairs(commands:split("\n")) do
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local cpos = command:find(" ")
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local cmd, param = command, ""
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if cpos then
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cmd = command:sub(1, cpos - 1)
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param = command:sub(cpos + 1)
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end
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local cmddef = minetest.chatcommands[cmd]
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if not cmddef then
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-- Invalid chat command
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return
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end
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-- Execute command in the name of commander
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local commander = meta:get_string("commander")
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cmddef.func(commander, param)
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end
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end
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local function commandblock_action_off(pos, node)
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if node.name == "mesecons_commandblock:commandblock_on" then
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minetest.swap_node(pos, {name = "mesecons_commandblock:commandblock_off"})
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end
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end
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local on_rightclick = function(pos, node, player, itemstack, pointed_thing)
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local can_edit = true
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-- Only allow write access in Creative Mode
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if not minetest.settings:get_bool("creative_mode") then
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can_edit = false
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end
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local pname = player:get_player_name()
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if minetest.is_protected(pos, pname) then
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can_edit = false
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end
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local privs = minetest.get_player_privs(pname)
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if not privs.maphack then
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can_edit = false
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end
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local meta = minetest.get_meta(pos)
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local commands = meta:get_string("commands")
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if not commands then
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commands = ""
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end
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local commander = meta:get_string("commander")
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local commanderstr
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if commander == "" or commander == nil then
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commanderstr = S("Error: No commander! Block must be replaced.")
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else
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commanderstr = S("Commander: @1", commander)
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end
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local textarea_name, submit, textarea
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-- If editing is not allowed, only allow read-only access.
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-- Player can still view the contents of the command block.
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if can_edit then
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textarea_name = "commands"
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submit = "button_exit[3.3,4.4;2,1;submit;"..F(S("Submit")).."]"
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else
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textarea_name = ""
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submit = ""
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end
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if not can_edit and commands == "" then
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textarea = "label[0.5,0.5;"..F(S("No commands.")).."]"
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else
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textarea = "textarea[0.5,0.5;8.5,4;"..textarea_name..";"..F(S("Commands:"))..";"..F(commands).."]"
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end
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local formspec = "size[9,5;]" ..
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textarea ..
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submit ..
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"image_button[8,4.4;1,1;doc_button_icon_lores.png;doc;]" ..
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"tooltip[doc;"..F(S("Help")).."]" ..
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"label[0,4;"..F(commanderstr).."]"
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minetest.show_formspec(pname, "commandblock_"..pos.x.."_"..pos.y.."_"..pos.z, formspec)
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end
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local on_place = function(itemstack, placer, pointed_thing)
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if pointed_thing.type ~= "node" then
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return itemstack
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end
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-- Use pointed node's on_rightclick function first, if present
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local node = minetest.get_node(pointed_thing.under)
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if placer and not placer:get_player_control().sneak then
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if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
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return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
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end
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end
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local privs = minetest.get_player_privs(placer:get_player_name())
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if not privs.maphack then
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minetest.chat_send_player(placer:get_player_name(), S("Placement denied. You need the “maphack” privilege to place command blocks."))
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return itemstack
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end
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return minetest.item_place_node(itemstack, placer, pointed_thing)
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end
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minetest.register_node("mesecons_commandblock:commandblock_off", {
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description = S("Command Block"),
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_tt_help = S("Executes server commands when powered by redstone power"),
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_doc_items_longdesc =
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S("Command blocks are mighty redstone components which are able to alter reality itself. In other words, they cause the server to execute server commands when they are supplied with redstone power."),
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_doc_items_usagehelp =
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S("Everyone can activate a command block and look at its commands, but not everyone can edit and place them.").."\n\n"..
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S("To view the commands in a command block, use it. To activate the command block, just supply it with redstone power. This will execute the commands once. To execute the commands again, turn the redstone power off and on again.")..
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"\n\n"..
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S("To be able to place a command block and change the commands, you need to be in Creative Mode and must have the “maphack” privilege. A new command block does not have any commands and does nothing. Use the command block (in Creative Mode!) to edit its commands. Read the help entry “Advanced topics > Server Commands” to understand how commands work. Each line contains a single command. You enter them like you would in the console, but without the leading slash. The commands will be executed from top to bottom.").."\n\n"..
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S("All commands will be executed on behalf of the player who placed the command block, as if the player typed in the commands. This player is said to be the “commander” of the block.").."\n\n"..
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S("Command blocks support placeholders, insert one of these placeholders and they will be replaced by some other text:").."\n"..
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S("• “@@c”: commander of this command block").."\n"..
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S("• “@@n” or “@@p”: nearest player from the command block").."\n"..
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S("• “@@f” farthest player from the command block").."\n"..
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S("• “@@r”: random player currently in the world").."\n"..
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S("• “@@@@”: literal “@@” sign").."\n\n"..
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S("Example 1:\n time 12000\nSets the game clock to 12:00").."\n\n"..
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S("Example 2:\n give @@n mcl_core:apple 5\nGives the nearest player 5 apples"),
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tiles = {{name="jeija_commandblock_off.png", animation={type="vertical_frames", aspect_w=32, aspect_h=32, length=2}}},
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groups = {creative_breakable=1, mesecon_effector_off=1},
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drop = "",
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on_blast = function() end,
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on_construct = construct,
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is_ground_content = false,
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on_place = on_place,
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after_place_node = after_place,
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on_rightclick = on_rightclick,
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sounds = mcl_sounds.node_sound_stone_defaults(),
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mesecons = {effector = {
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action_on = commandblock_action_on,
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rules = mesecon.rules.alldirs,
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}},
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_mcl_blast_resistance = 3600000,
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_mcl_hardness = -1,
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})
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minetest.register_node("mesecons_commandblock:commandblock_on", {
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tiles = {{name="jeija_commandblock_off.png", animation={type="vertical_frames", aspect_w=32, aspect_h=32, length=2}}},
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groups = {creative_breakable=1, mesecon_effector_on=1, not_in_creative_inventory=1},
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drop = "",
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on_blast = function() end,
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on_construct = construct,
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is_ground_content = false,
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on_place = on_place,
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after_place_node = after_place,
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on_rightclick = on_rightclick,
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sounds = mcl_sounds.node_sound_stone_defaults(),
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mesecons = {effector = {
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action_off = commandblock_action_off,
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rules = mesecon.rules.alldirs,
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}},
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_mcl_blast_resistance = 3600000,
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_mcl_hardness = -1,
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})
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minetest.register_on_player_receive_fields(function(player, formname, fields)
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if string.sub(formname, 1, 13) == "commandblock_" then
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if fields.doc and minetest.get_modpath("doc") then
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doc.show_entry(player:get_player_name(), "nodes", "mesecons_commandblock:commandblock_off", true)
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return
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end
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if (not fields.submit and not fields.key_enter) or (not fields.commands) then
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return
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end
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local privs = minetest.get_player_privs(player:get_player_name())
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if not privs.maphack then
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minetest.chat_send_player(player:get_player_name(), S("Access denied. You need the “maphack” privilege to edit command blocks."))
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return
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end
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local index, _, x, y, z = string.find(formname, "commandblock_(-?%d+)_(-?%d+)_(-?%d+)")
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if index ~= nil and x ~= nil and y ~= nil and z ~= nil then
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local pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
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local meta = minetest.get_meta(pos)
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if not minetest.settings:get_bool("creative_mode") then
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minetest.chat_send_player(player:get_player_name(), S("Editing the command block has failed! You can only change the command block in Creative Mode!"))
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return
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end
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local check, error_message = check_commands(fields.commands, player:get_player_name())
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if check == false then
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-- Command block rejected
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minetest.chat_send_player(player:get_player_name(), error_message)
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return
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else
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meta:set_string("commands", fields.commands)
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end
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else
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minetest.chat_send_player(player:get_player_name(), S("Editing the command block has failed! The command block is gone."))
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end
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end
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end)
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-- Add entry alias for the Help
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if minetest.get_modpath("doc") then
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doc.add_entry_alias("nodes", "mesecons_commandblock:commandblock_off", "nodes", "mesecons_commandblock:commandblock_on")
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end
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