mods/default/functions.lua

   1 --
   2 -- Sounds
   3 --
   4
   5 function default.node_sound_defaults(table)
   6         table = table or {}
   7         table.footstep = table.footstep or
   8                         {name = "", gain = 1.0}
   9         table.dug = table.dug or
  10                         {name = "default_dug_node", gain = 0.25}
  11         table.place = table.place or
  12                         {name = "default_place_node_hard", gain = 1.0}
  13         return table
  14 end
  15
  16 function default.node_sound_stone_defaults(table)
  17         table = table or {}
  18         table.footstep = table.footstep or
  19                         {name = "default_hard_footstep", gain = 0.3}
  20         table.dug = table.dug or
  21                         {name = "default_hard_footstep", gain = 1.0}
  22         default.node_sound_defaults(table)
  23         return table
  24 end
  25
  26 function default.node_sound_dirt_defaults(table)
  27         table = table or {}
  28         table.footstep = table.footstep or
  29                         {name = "default_dirt_footstep", gain = 0.4}
  30         table.dug = table.dug or
  31                         {name = "default_dirt_footstep", gain = 1.0}
  32         table.place = table.place or
  33                         {name = "default_place_node", gain = 1.0}
  34         default.node_sound_defaults(table)
  35         return table
  36 end
  37
  38 function default.node_sound_sand_defaults(table)
  39         table = table or {}
  40         table.footstep = table.footstep or
  41                         {name = "default_sand_footstep", gain = 0.12}
  42         table.dug = table.dug or
  43                         {name = "default_sand_footstep", gain = 0.24}
  44         table.place = table.place or
  45                         {name = "default_place_node", gain = 1.0}
  46         default.node_sound_defaults(table)
  47         return table
  48 end
  49
  50 function default.node_sound_gravel_defaults(table)
  51         table = table or {}
  52         table.footstep = table.footstep or
  53                         {name = "default_gravel_footstep", gain = 0.4}
  54         table.dug = table.dug or
  55                         {name = "default_gravel_footstep", gain = 1.0}
  56         table.place = table.place or
  57                         {name = "default_place_node", gain = 1.0}
  58         default.node_sound_defaults(table)
  59         return table
  60 end
  61
  62 function default.node_sound_wood_defaults(table)
  63         table = table or {}
  64         table.footstep = table.footstep or
  65                         {name = "default_wood_footstep", gain = 0.3}
  66         table.dug = table.dug or
  67                         {name = "default_wood_footstep", gain = 1.0}
  68         default.node_sound_defaults(table)
  69         return table
  70 end
  71
  72 function default.node_sound_leaves_defaults(table)
  73         table = table or {}
  74         table.footstep = table.footstep or
  75                         {name = "default_grass_footstep", gain = 0.45}
  76         table.dug = table.dug or
  77                         {name = "default_grass_footstep", gain = 0.7}
  78         table.place = table.place or
  79                         {name = "default_place_node", gain = 1.0}
  80         default.node_sound_defaults(table)
  81         return table
  82 end
  83
  84 function default.node_sound_glass_defaults(table)
  85         table = table or {}
  86         table.footstep = table.footstep or
  87                         {name = "default_glass_footstep", gain = 0.3}
  88         table.dig = table.dig or
  89                         {name = "default_glass_footstep", gain = 0.5}
  90         table.dug = table.dug or
  91                         {name = "default_break_glass", gain = 1.0}
  92         default.node_sound_defaults(table)
  93         return table
  94 end
  95
  96 function default.node_sound_metal_defaults(table)
  97         table = table or {}
  98         table.footstep = table.footstep or
  99                         {name = "default_metal_footstep", gain = 0.4}
 100         table.dig = table.dig or
 101                         {name = "default_dig_metal", gain = 0.5}
 102         table.dug = table.dug or
 103                         {name = "default_dug_metal", gain = 0.5}
 104         table.place = table.place or
 105                         {name = "default_place_node_metal", gain = 0.5}
 106         default.node_sound_defaults(table)
 107         return table
 108 end
 109
 110 function default.node_sound_water_defaults(table)
 111         table = table or {}
 112         table.footstep = table.footstep or
 113                         {name = "default_water_footstep", gain = 0.2}
 114         default.node_sound_defaults(table)
 115         return table
 116 end
 117
 118 function default.node_sound_snow_defaults(table)
 119         table = table or {}
 120         table.footstep = table.footstep or
 121                         {name = "default_snow_footstep", gain = 0.2}
 122         table.dig = table.dig or
 123                         {name = "default_snow_footstep", gain = 0.3}
 124         table.dug = table.dug or
 125                         {name = "default_snow_footstep", gain = 0.3}
 126         table.place = table.place or
 127                         {name = "default_place_node", gain = 1.0}
 128         default.node_sound_defaults(table)
 129         return table
 130 end
 131
 132
 133 --
 134 -- Lavacooling
 135 --
 136
 137 default.cool_lava = function(pos, node)
 138         if node.name == "default:lava_source" then
 139                 minetest.set_node(pos, {name = "default:obsidian"})
 140         else -- Lava flowing
 141                 minetest.set_node(pos, {name = "default:stone"})
 142         end
 143         minetest.sound_play("default_cool_lava",
 144                 {pos = pos, max_hear_distance = 16, gain = 0.25}, true)
 145 end
 146
 147 if minetest.settings:get_bool("enable_lavacooling") ~= false then
 148         minetest.register_abm({
 149                 label = "Lava cooling",
 150                 nodenames = {"default:lava_source", "default:lava_flowing"},
 151                 neighbors = {"group:cools_lava", "group:water"},
 152                 interval = 2,
 153                 chance = 2,
 154                 catch_up = false,
 155                 action = function(...)
 156                         default.cool_lava(...)
 157                 end,
 158         })
 159 end
 160
 161
 162 --
 163 -- Optimized helper to put all items in an inventory into a drops list
 164 --
 165
 166 function default.get_inventory_drops(pos, inventory, drops)
 167         local inv = minetest.get_meta(pos):get_inventory()
 168         local n = #drops
 169         for i = 1, inv:get_size(inventory) do
 170                 local stack = inv:get_stack(inventory, i)
 171                 if stack:get_count() > 0 then
 172                         drops[n+1] = stack:to_table()
 173                         n = n + 1
 174                 end
 175         end
 176 end
 177
 178
 179 --
 180 -- Papyrus and cactus growing
 181 --
 182
 183 -- Wrapping the functions in ABM action is necessary to make overriding them possible
 184
 185 function default.grow_cactus(pos, node)
 186         if node.param2 >= 4 then
 187                 return
 188         end
 189         pos.y = pos.y - 1
 190         if minetest.get_item_group(minetest.get_node(pos).name, "sand") == 0 then
 191                 return
 192         end
 193         pos.y = pos.y + 1
 194         local height = 0
 195         while node.name == "default:cactus" and height < 4 do
 196                 height = height + 1
 197                 pos.y = pos.y + 1
 198                 node = minetest.get_node(pos)
 199         end
 200         if height == 4 or node.name ~= "air" then
 201                 return
 202         end
 203         if minetest.get_node_light(pos) < 13 then
 204                 return
 205         end
 206         minetest.set_node(pos, {name = "default:cactus"})
 207         return true
 208 end
 209
 210 function default.grow_papyrus(pos, node)
 211         pos.y = pos.y - 1
 212         local name = minetest.get_node(pos).name
 213         if name ~= "default:dirt" and
 214                         name ~= "default:dirt_with_grass" and
 215                         name ~= "default:dirt_with_dry_grass" and
 216                         name ~= "default:dirt_with_rainforest_litter" and
 217                         name ~= "default:dry_dirt" and
 218                         name ~= "default:dry_dirt_with_dry_grass" then
 219                 return
 220         end
 221         if not minetest.find_node_near(pos, 3, {"group:water"}) then
 222                 return
 223         end
 224         pos.y = pos.y + 1
 225         local height = 0
 226         while node.name == "default:papyrus" and height < 4 do
 227                 height = height + 1
 228                 pos.y = pos.y + 1
 229                 node = minetest.get_node(pos)
 230         end
 231         if height == 4 or node.name ~= "air" then
 232                 return
 233         end
 234         if minetest.get_node_light(pos) < 13 then
 235                 return
 236         end
 237         minetest.set_node(pos, {name = "default:papyrus"})
 238         return true
 239 end
 240
 241 minetest.register_abm({
 242         label = "Grow cactus",
 243         nodenames = {"default:cactus"},
 244         neighbors = {"group:sand"},
 245         interval = 12,
 246         chance = 83,
 247         action = function(...)
 248                 default.grow_cactus(...)
 249         end
 250 })
 251
 252 minetest.register_abm({
 253         label = "Grow papyrus",
 254         nodenames = {"default:papyrus"},
 255         -- Grows on the dirt and surface dirt nodes of the biomes papyrus appears in,
 256         -- including the old savanna nodes.
 257         -- 'default:dirt_with_grass' is here only because it was allowed before.
 258         neighbors = {
 259                 "default:dirt",
 260                 "default:dirt_with_grass",
 261                 "default:dirt_with_dry_grass",
 262                 "default:dirt_with_rainforest_litter",
 263                 "default:dry_dirt",
 264                 "default:dry_dirt_with_dry_grass",
 265         },
 266         interval = 14,
 267         chance = 71,
 268         action = function(...)
 269                 default.grow_papyrus(...)
 270         end
 271 })
 272
 273
 274 --
 275 -- Dig upwards
 276 --
 277
 278 function default.dig_up(pos, node, digger)
 279         if digger == nil then return end
 280         local np = {x = pos.x, y = pos.y + 1, z = pos.z}
 281         local nn = minetest.get_node(np)
 282         if nn.name == node.name then
 283                 minetest.node_dig(np, nn, digger)
 284         end
 285 end
 286
 287
 288 --
 289 -- Fence registration helper
 290 --
 291 local fence_collision_extra = minetest.settings:get_bool("enable_fence_tall") and 3/8 or 0
 292
 293 function default.register_fence(name, def)
 294         minetest.register_craft({
 295                 output = name .. " 4",
 296                 recipe = {
 297                         { def.material, 'group:stick', def.material },
 298                         { def.material, 'group:stick', def.material },
 299                 }
 300         })
 301
 302         local fence_texture = "default_fence_overlay.png^" .. def.texture ..
 303                         "^default_fence_overlay.png^[makealpha:255,126,126"
 304         -- Allow almost everything to be overridden
 305         local default_fields = {
 306                 paramtype = "light",
 307                 drawtype = "nodebox",
 308                 node_box = {
 309                         type = "connected",
 310                         fixed = {-1/8, -1/2, -1/8, 1/8, 1/2, 1/8},
 311                         -- connect_top =
 312                         -- connect_bottom =
 313                         connect_front = {{-1/16,  3/16, -1/2,   1/16,  5/16, -1/8 },
 314                                          {-1/16, -5/16, -1/2,   1/16, -3/16, -1/8 }},
 315                         connect_left =  {{-1/2,   3/16, -1/16, -1/8,   5/16,  1/16},
 316                                          {-1/2,  -5/16, -1/16, -1/8,  -3/16,  1/16}},
 317                         connect_back =  {{-1/16,  3/16,  1/8,   1/16,  5/16,  1/2 },
 318                                          {-1/16, -5/16,  1/8,   1/16, -3/16,  1/2 }},
 319                         connect_right = {{ 1/8,   3/16, -1/16,  1/2,   5/16,  1/16},
 320                                          { 1/8,  -5/16, -1/16,  1/2,  -3/16,  1/16}}
 321                 },
 322                 collision_box = {
 323                         type = "connected",
 324                         fixed = {-1/8, -1/2, -1/8, 1/8, 1/2 + fence_collision_extra, 1/8},
 325                         -- connect_top =
 326                         -- connect_bottom =
 327                         connect_front = {-1/8, -1/2, -1/2,  1/8, 1/2 + fence_collision_extra, -1/8},
 328                         connect_left =  {-1/2, -1/2, -1/8, -1/8, 1/2 + fence_collision_extra,  1/8},
 329                         connect_back =  {-1/8, -1/2,  1/8,  1/8, 1/2 + fence_collision_extra,  1/2},
 330                         connect_right = { 1/8, -1/2, -1/8,  1/2, 1/2 + fence_collision_extra,  1/8}
 331                 },
 332                 connects_to = {"group:fence", "group:wood", "group:tree", "group:wall"},
 333                 inventory_image = fence_texture,
 334                 wield_image = fence_texture,
 335                 tiles = {def.texture},
 336                 sunlight_propagates = true,
 337                 is_ground_content = false,
 338                 groups = {},
 339         }
 340         for k, v in pairs(default_fields) do
 341                 if def[k] == nil then
 342                         def[k] = v
 343                 end
 344         end
 345
 346         -- Always add to the fence group, even if no group provided
 347         def.groups.fence = 1
 348
 349         def.texture = nil
 350         def.material = nil
 351
 352         minetest.register_node(name, def)
 353 end
 354
 355
 356 --
 357 -- Fence rail registration helper
 358 --
 359
 360 function default.register_fence_rail(name, def)
 361         minetest.register_craft({
 362                 output = name .. " 16",
 363                 recipe = {
 364                         { def.material, def.material },
 365                         { "", ""},
 366                         { def.material, def.material },
 367                 }
 368         })
 369
 370         local fence_rail_texture = "default_fence_rail_overlay.png^" .. def.texture ..
 371                         "^default_fence_rail_overlay.png^[makealpha:255,126,126"
 372         -- Allow almost everything to be overridden
 373         local default_fields = {
 374                 paramtype = "light",
 375                 drawtype = "nodebox",
 376                 node_box = {
 377                         type = "connected",
 378                         fixed = {{-1/16,  3/16, -1/16, 1/16,  5/16, 1/16},
 379                                  {-1/16, -3/16, -1/16, 1/16, -5/16, 1/16}},
 380                         -- connect_top =
 381                         -- connect_bottom =
 382                         connect_front = {{-1/16,  3/16, -1/2,   1/16,  5/16, -1/16},
 383                                          {-1/16, -5/16, -1/2,   1/16, -3/16, -1/16}},
 384                         connect_left =  {{-1/2,   3/16, -1/16, -1/16,  5/16,  1/16},
 385                                          {-1/2,  -5/16, -1/16, -1/16, -3/16,  1/16}},
 386                         connect_back =  {{-1/16,  3/16,  1/16,  1/16,  5/16,  1/2 },
 387                                          {-1/16, -5/16,  1/16,  1/16, -3/16,  1/2 }},
 388                         connect_right = {{ 1/16,  3/16, -1/16,  1/2,   5/16,  1/16},
 389                                          { 1/16, -5/16, -1/16,  1/2,  -3/16,  1/16}}
 390                 },
 391                 collision_box = {
 392                         type = "connected",
 393                         fixed = {-1/8, -1/2, -1/8, 1/8, 1/2 + fence_collision_extra, 1/8},
 394                         -- connect_top =
 395                         -- connect_bottom =
 396                         connect_front = {-1/8, -1/2, -1/2,  1/8, 1/2 + fence_collision_extra, -1/8},
 397                         connect_left =  {-1/2, -1/2, -1/8, -1/8, 1/2 + fence_collision_extra,  1/8},
 398                         connect_back =  {-1/8, -1/2,  1/8,  1/8, 1/2 + fence_collision_extra,  1/2},
 399                         connect_right = { 1/8, -1/2, -1/8,  1/2, 1/2 + fence_collision_extra,  1/8}
 400                 },
 401                 connects_to = {"group:fence", "group:wall"},
 402                 inventory_image = fence_rail_texture,
 403                 wield_image = fence_rail_texture,
 404                 tiles = {def.texture},
 405                 sunlight_propagates = true,
 406                 is_ground_content = false,
 407                 groups = {},
 408         }
 409         for k, v in pairs(default_fields) do
 410                 if def[k] == nil then
 411                         def[k] = v
 412                 end
 413         end
 414
 415         -- Always add to the fence group, even if no group provided
 416         def.groups.fence = 1
 417
 418         def.texture = nil
 419         def.material = nil
 420
 421         minetest.register_node(name, def)
 422 end
 423
 424
 425 --
 426 -- Leafdecay
 427 --
 428
 429 -- Prevent decay of placed leaves
 430
 431 default.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
 432         if placer and placer:is_player() then
 433                 local node = minetest.get_node(pos)
 434                 node.param2 = 1
 435                 minetest.set_node(pos, node)
 436         end
 437 end
 438
 439 -- Leafdecay
 440 local function leafdecay_after_destruct(pos, oldnode, def)
 441         for _, v in pairs(minetest.find_nodes_in_area(vector.subtract(pos, def.radius),
 442                         vector.add(pos, def.radius), def.leaves)) do
 443                 local node = minetest.get_node(v)
 444                 local timer = minetest.get_node_timer(v)
 445                 if node.param2 ~= 1 and not timer:is_started() then
 446                         timer:start(math.random(20, 120) / 10)
 447                 end
 448         end
 449 end
 450
 451 local movement_gravity = tonumber(
 452         minetest.settings:get("movement_gravity")) or 9.81
 453
 454 local function leafdecay_on_timer(pos, def)
 455         if minetest.find_node_near(pos, def.radius, def.trunks) then
 456                 return false
 457         end
 458
 459         local node = minetest.get_node(pos)
 460         local drops = minetest.get_node_drops(node.name)
 461         for _, item in ipairs(drops) do
 462                 local is_leaf
 463                 for _, v in pairs(def.leaves) do
 464                         if v == item then
 465                                 is_leaf = true
 466                         end
 467                 end
 468                 if minetest.get_item_group(item, "leafdecay_drop") ~= 0 or
 469                                 not is_leaf then
 470                         minetest.add_item({
 471                                 x = pos.x - 0.5 + math.random(),
 472                                 y = pos.y - 0.5 + math.random(),
 473                                 z = pos.z - 0.5 + math.random(),
 474                         }, item)
 475                 end
 476         end
 477
 478         minetest.remove_node(pos)
 479         minetest.check_for_falling(pos)
 480
 481         -- spawn a few particles for the removed node
 482         minetest.add_particlespawner({
 483                 amount = 8,
 484                 time = 0.001,
 485                 minpos = vector.subtract(pos, {x=0.5, y=0.5, z=0.5}),
 486                 maxpos = vector.add(pos, {x=0.5, y=0.5, z=0.5}),
 487                 minvel = vector.new(-0.5, -1, -0.5),
 488                 maxvel = vector.new(0.5, 0, 0.5),
 489                 minacc = vector.new(0, -movement_gravity, 0),
 490                 maxacc = vector.new(0, -movement_gravity, 0),
 491                 minsize = 0,
 492                 maxsize = 0,
 493                 node = node,
 494         })
 495 end
 496
 497 function default.register_leafdecay(def)
 498         assert(def.leaves)
 499         assert(def.trunks)
 500         assert(def.radius)
 501         for _, v in pairs(def.trunks) do
 502                 minetest.override_item(v, {
 503                         after_destruct = function(pos, oldnode)
 504                                 leafdecay_after_destruct(pos, oldnode, def)
 505                         end,
 506                 })
 507         end
 508         for _, v in pairs(def.leaves) do
 509                 minetest.override_item(v, {
 510                         on_timer = function(pos)
 511                                 leafdecay_on_timer(pos, def)
 512                         end,
 513                 })
 514         end
 515 end
 516
 517
 518 --
 519 -- Convert default:dirt to something that fits the environment
 520 --
 521
 522 minetest.register_abm({
 523         label = "Grass spread",
 524         nodenames = {"default:dirt"},
 525         neighbors = {
 526                 "air",
 527                 "group:grass",
 528                 "group:dry_grass",
 529                 "default:snow",
 530         },
 531         interval = 6,
 532         chance = 50,
 533         catch_up = false,
 534         action = function(pos, node)
 535                 -- Check for darkness: night, shadow or under a light-blocking node
 536                 -- Returns if ignore above
 537                 local above = {x = pos.x, y = pos.y + 1, z = pos.z}
 538                 if (minetest.get_node_light(above) or 0) < 13 then
 539                         return
 540                 end
 541
 542                 -- Look for spreading dirt-type neighbours
 543                 local p2 = minetest.find_node_near(pos, 1, "group:spreading_dirt_type")
 544                 if p2 then
 545                         local n3 = minetest.get_node(p2)
 546                         minetest.set_node(pos, {name = n3.name})
 547                         return
 548                 end
 549
 550                 -- Else, any seeding nodes on top?
 551                 local name = minetest.get_node(above).name
 552                 -- Snow check is cheapest, so comes first
 553                 if name == "default:snow" then
 554                         minetest.set_node(pos, {name = "default:dirt_with_snow"})
 555                 elseif minetest.get_item_group(name, "grass") ~= 0 then
 556                         minetest.set_node(pos, {name = "default:dirt_with_grass"})
 557                 elseif minetest.get_item_group(name, "dry_grass") ~= 0 then
 558                         minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
 559                 end
 560         end
 561 })
 562
 563
 564 --
 565 -- Grass and dry grass removed in darkness
 566 --
 567
 568 minetest.register_abm({
 569         label = "Grass covered",
 570         nodenames = {"group:spreading_dirt_type", "default:dry_dirt_with_dry_grass"},
 571         interval = 8,
 572         chance = 50,
 573         catch_up = false,
 574         action = function(pos, node)
 575                 local above = {x = pos.x, y = pos.y + 1, z = pos.z}
 576                 local name = minetest.get_node(above).name
 577                 local nodedef = minetest.registered_nodes[name]
 578                 if name ~= "ignore" and nodedef and not ((nodedef.sunlight_propagates or
 579                                 nodedef.paramtype == "light") and
 580                                 nodedef.liquidtype == "none") then
 581                         if node.name == "default:dry_dirt_with_dry_grass" then
 582                                 minetest.set_node(pos, {name = "default:dry_dirt"})
 583                         else
 584                                 minetest.set_node(pos, {name = "default:dirt"})
 585                         end
 586                 end
 587         end
 588 })
 589
 590
 591 --
 592 -- Moss growth on cobble near water
 593 --
 594
 595 local moss_correspondences = {
 596         ["default:cobble"] = "default:mossycobble",
 597         ["stairs:slab_cobble"] = "stairs:slab_mossycobble",
 598         ["stairs:stair_cobble"] = "stairs:stair_mossycobble",
 599         ["stairs:stair_inner_cobble"] = "stairs:stair_inner_mossycobble",
 600         ["stairs:stair_outer_cobble"] = "stairs:stair_outer_mossycobble",
 601         ["walls:cobble"] = "walls:mossycobble",
 602 }
 603 minetest.register_abm({
 604         label = "Moss growth",
 605         nodenames = {"default:cobble", "stairs:slab_cobble", "stairs:stair_cobble",
 606                 "stairs:stair_inner_cobble", "stairs:stair_outer_cobble",
 607                 "walls:cobble"},
 608         neighbors = {"group:water"},
 609         interval = 16,
 610         chance = 200,
 611         catch_up = false,
 612         action = function(pos, node)
 613                 node.name = moss_correspondences[node.name]
 614                 if node.name then
 615                         minetest.set_node(pos, node)
 616                 end
 617         end
 618 })
 619
 620 --
 621 -- Register a craft to copy the metadata of items
 622 --
 623
 624 function default.register_craft_metadata_copy(ingredient, result)
 625         minetest.register_craft({
 626                 type = "shapeless",
 627                 output = result,
 628                 recipe = {ingredient, result}
 629         })
 630
 631         minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
 632                 if itemstack:get_name() ~= result then
 633                         return
 634                 end
 635
 636                 local original
 637                 local index
 638                 for i = 1, #old_craft_grid do
 639                         if old_craft_grid[i]:get_name() == result then
 640                                 original = old_craft_grid[i]
 641                                 index = i
 642                         end
 643                 end
 644                 if not original then
 645                         return
 646                 end
 647                 local copymeta = original:get_meta():to_table()
 648                 itemstack:get_meta():from_table(copymeta)
 649                 -- put the book with metadata back in the craft grid
 650                 craft_inv:set_stack("craft", index, original)
 651         end)
 652 end
 653
 654
 655 --
 656 -- NOTICE: This method is not an official part of the API yet.
 657 -- This method may change in future.
 658 --
 659
 660 function default.can_interact_with_node(player, pos)
 661         if player and player:is_player() then
 662                 if minetest.check_player_privs(player, "protection_bypass") then
 663                         return true
 664                 end
 665         else
 666                 return false
 667         end
 668
 669         local meta = minetest.get_meta(pos)
 670         local owner = meta:get_string("owner")
 671
 672         if not owner or owner == "" or owner == player:get_player_name() then
 673                 return true
 674         end
 675
 676         -- Is player wielding the right key?
 677         local item = player:get_wielded_item()
 678         if minetest.get_item_group(item:get_name(), "key") == 1 then
 679                 local key_meta = item:get_meta()
 680
 681                 if key_meta:get_string("secret") == "" then
 682                         local key_oldmeta = item:get_metadata()
 683                         if key_oldmeta == "" or not minetest.parse_json(key_oldmeta) then
 684                                 return false
 685                         end
 686
 687                         key_meta:set_string("secret", minetest.parse_json(key_oldmeta).secret)
 688                         item:set_metadata("")
 689                 end
 690
 691                 return meta:get_string("key_lock_secret") == key_meta:get_string("secret")
 692         end
 693
 694         return false
 695 end