worldedit_commands/safe.lua

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