worldedit_commands/safe.lua

   1 local safe_region_callback = {}\r
   2 local safe_region_param = {}\r
   3 \r
   4 worldedit._override_safe_regions = false -- internal use ONLY!\r
   5 \r
   6 local function check_region(name, param)\r
   7         local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name] --obtain positions\r
   8         if pos1 == nil or pos2 == nil then\r
   9                 worldedit.player_notify(name, "no region selected")\r
  10                 return nil\r
  11         end\r
  12         return worldedit.volume(pos1, pos2)\r
  13 end\r
  14 \r
  15 --`callback` is a callback to run when the user confirms\r
  16 --`nodes_needed` is a function accepting `param`, `pos1`, and `pos2` to calculate the number of nodes needed\r
  17 local function safe_region(callback, nodes_needed)\r
  18         --default node volume calculation\r
  19         nodes_needed = nodes_needed or check_region\r
  20 \r
  21         return function(name, param)\r
  22                 --check if the operation applies to a safe number of nodes\r
  23                 local count = nodes_needed(name, param)\r
  24                 if count == nil then return end --invalid command\r
  25                 if worldedit._override_safe_regions or count < 10000 then\r
  26                         return callback(name, param)\r
  27                 end\r
  28 \r
  29                 --save callback to call later\r
  30                 safe_region_callback[name], safe_region_param[name] = callback, param\r
  31                 worldedit.player_notify(name, "WARNING: this operation could affect up to " .. count .. " nodes; type //y to continue or //n to cancel")\r
  32         end\r
  33 end\r
  34 \r
  35 local function reset_pending(name)\r
  36         safe_region_callback[name], safe_region_param[name] = nil, nil\r
  37 end\r
  38 \r
  39 minetest.register_chatcommand("/y", {\r
  40         params = "",\r
  41         description = "Confirm a pending operation",\r
  42         func = function(name)\r
  43                 local callback, param = safe_region_callback[name], safe_region_param[name]\r
  44                 if not callback then\r
  45                         worldedit.player_notify(name, "no operation pending")\r
  46                         return\r
  47                 end\r
  48 \r
  49                 reset_pending(name)\r
  50                 callback(name, param)\r
  51         end,\r
  52 })\r
  53 \r
  54 minetest.register_chatcommand("/n", {\r
  55         params = "",\r
  56         description = "Abort a pending operation",\r
  57         func = function(name)\r
  58                 if not safe_region_callback[name] then\r
  59                         worldedit.player_notify(name, "no operation pending")\r
  60                         return\r
  61                 end\r
  62 \r
  63                 reset_pending(name)\r
  64         end,\r
  65 })\r
  66 \r
  67 \r
  68 return safe_region, check_region, reset_pending\r