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core: implement safe_region

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Starbeamrainbowlabs 2022-05-18 02:31:08 +01:00
parent 8f6c3e020f
commit 4306035ef2
Signed by: sbrl
GPG key ID: 1BE5172E637709C2
2 changed files with 70 additions and 3 deletions
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6
worldeditadditions_core/core/run_command.lua
View file

@ -1,5 +1,7 @@
local we_c = worldeditadditions_core
-- WARNING: safe_region MUST NOT be imported more than once, as it defines chat commands. If you want to import it again elsewhere, check first that multiple dofile() calls don't execute a file more than once.
local safe_region = dofile(we_c.modpath.."/core/safe_region.lua")
local human_size = dofile(we_c.modpath.."/core/lib/human_size.lua")
-- TODO: Reimplement worldedit.player_notify(player_name, msg_text)
@ -39,9 +41,9 @@ local function run_command(cmdname, options, player_name, paramtext)
if potential_changes > limit then
worldedit.player_notify(player_name, "/"..cmdname.." "..paramtext.."' may affect up to "..human_size(potential_changes).." nodes. Type //y to continue, or //n to cancel (see the //saferegion command to control when this message appears).")
-- TODO: Wrap run_command_stage2 in safe_region stuff
safe_region(player_name, cmdname, function()
run_command_stage2(player_name, options.func, parse_result)
end)
end
else
run_command_stage2(player_name, options.func, parse_result)

65
worldeditadditions_core/core/safe_region.lua Normal file
View file

@ -0,0 +1,65 @@
-- ███████ █████ ███████ ███████ ██████ ███████ ██████ ██ ██████ ███ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ████ ██
-- ███████ ███████ █████ █████ ██████ █████ ██ ███ ██ ██ ██ ██ ██ ██
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ███████ ██ ██ ██ ███████ ██ ██ ███████ ██████ ██ ██████ ██ ████
local worldedit_command_y, worldedit_command_n
if minetest.global_exists("worldedit") then
worldedit_command_y = minetest.registered_commands["/y"].func
worldedit_command_n = minetest.registered_commands["/n"].func
end
--- A table that holds at most 1 pending function call per player.
local pending_calls = {}
--- Captures the given function in the safe_region subsystem for later execution.
-- @param player_name string The name of the player.
-- @param cmdname string The name of the command being executed.
-- @param func function The function to execute later. Will be passed NO ARGUMENTS should it ever get executed in the future (this is not guaranteed).
-- @returns nil
local function safe_region(player_name, cmdname, func)
pending_calls[player_name] = {
cmdname = cmdname,
func = func
}
end
minetest.override_chatcommand("/y", {
params = "",
description = "Run a pending operation that was captured by the safe region system earlier.",
func = function(player_name)
if pending_calls[player_name] == nil then
if minetest.global_exists("worldedit") and worldedit_command_y ~= nil then
worldedit_command_y(player_name)
else
worldedit.player_notify(player_name, "There aren't any pending operations at the moment.")
end
else
pending_calls[player_name].func()
pending_calls[player_name] = nil
end
end
})
minetest.override_chatcommand("/n", {
params = "",
description = "Abort a pending operation that was captured by the safe region system.",
func = function(player_name)
if pending_calls[player_name] == nil then
if minetest.global_exists("worldedit") and worldedit_command_y ~= nil then
worldedit_command_n(player_name)
else
worldedit.player_notify(player_name, "There aren't any operations pending, so there's nothing to abort.")
end
else
worldedit.player_notify(player_name, "Aborting captured command /"..pending_calls[player_name].cmdname..".")
pending_calls[player_name] = nil
end
end
})
return safe_region