mods/ENTITIES/mobs_mc/villager.lua

   1 --MCmobs v0.4
   2 --maikerumine
   3 --made for MC like Survival game
   4 --License for code WTFPL and otherwise stated in readmes
   5
   6 --###################
   7 --################### VILLAGER
   8 --###################
   9 -- Summary: Villagers are complex NPCs, their main feature allows players to trade with them.
  10
  11 -- TODO: Particles
  12 -- TODO: 4s Regeneration I after trade unlock
  13 -- TODO: Breeding
  14 -- TODO: Baby villagers
  15 -- TODO: Spawning in villages
  16 -- TODO: Behaviour:
  17 --     TODO: Walk around village, but do not leave it intentionally
  18 --     TODO: Run into house on rain or danger, open doors
  19 --     TODO: Internal inventory, pick up items, trade with other villagers
  20 --     TODO: Farm stuff
  21
  22 -- intllib
  23 local MP = minetest.get_modpath(minetest.get_current_modname())
  24 local S, NS = dofile(MP.."/intllib.lua")
  25
  26 -- playername-indexed table containing the previously used tradenum
  27 local player_tradenum = {}
  28 -- playername-indexed table containing the objectref of trader, if trading formspec is open
  29 local player_trading_with = {}
  30
  31 local DEFAULT_WALK_CHANCE = 33 -- chance to walk in percent, if no player nearby
  32 local PLAYER_SCAN_INTERVAL = 5 -- every X seconds, villager looks for players nearby
  33 local PLAYER_SCAN_RADIUS = 4 -- scan radius for looking for nearby players
  34
  35 --[=======[ TRADING ]=======]
  36
  37 -- LIST OF VILLAGER PROFESSIONS AND TRADES
  38
  39 -- TECHNICAL RESTRICTIONS (FIXME):
  40 -- * You can't use a clock as requested item
  41 -- * You can't use a compass as requested item if its stack size > 1
  42 -- * You can't use a compass in the second requested slot
  43 -- This is a problem in the mcl_compass and mcl_clock mods,
  44 -- these items should be implemented as single items, then everything
  45 -- will be much easier.
  46
  47 local COMPASS = "mcl_compass:compass"
  48 if minetest.registered_aliases[COMPASS] then
  49         COMPASS = minetest.registered_aliases[COMPASS]
  50 end
  51
  52 local E1 = { "mcl_core:emerald", 1, 1 } -- one emerald
  53
  54 -- Special trades for v6 only
  55 local TRADE_V6_RED_SANDSTONE, TRADE_V6_DARK_OAK_SAPLING, TRADE_V6_ACACIA_SAPLING, TRADE_V6_BIRCH_SAPLING
  56 if minetest.get_mapgen_setting("mg_name") == "v6" then
  57         TRADE_V6_RED_SANDSTONE = { E1, { "mcl_core:redsandstone", 12, 16 } }
  58         TRADE_V6_DARK_OAK_SAPLING = { { "mcl_core:emerald", 6, 9 }, { "mcl_core:darksapling", 1, 1 } }
  59         TRADE_V6_ACACIA_SAPLING = { { "mcl_core:emerald", 14, 17 }, { "mcl_core:acaciasapling", 1, 1 } }
  60         TRADE_V6_BIRCH_SAPLING = { { "mcl_core:emerald", 8, 11 }, { "mcl_core:birchsapling", 1, 1 } }
  61 end
  62
  63 local professions = {
  64         farmer = {
  65                 name = "Farmer",
  66                 texture = "mobs_mc_villager_farmer.png",
  67                 trades = {
  68                         {
  69                         { { "mcl_farming:wheat_item", 18, 22, }, E1 },
  70                         { { "mcl_farming:potato_item", 15, 19, }, E1 },
  71                         { { "mcl_farming:carrot_item", 15, 19, }, E1 },
  72                         { E1, { "mcl_farming:bread", 2, 4 } },
  73                         },
  74
  75                         {
  76                         { { "mcl_farming:pumpkin_face", 8, 13 }, E1 },
  77                         { E1, { "mcl_farming:pumpkin_pie", 2, 3} },
  78                         },
  79
  80                         {
  81                         { { "mcl_farming:melon", 7, 12 }, E1 },
  82                         { E1, { "mcl_core:apple", 5, 7 }, },
  83                         },
  84
  85                         {
  86                         { E1, { "mcl_farming:cookie", 6, 10 } },
  87                         { E1, { "mcl_cake:cake", 1, 1 } },
  88                         TRADE_V6_BIRCH_SAPLING,
  89                         TRADE_V6_DARK_OAK_SAPLING,
  90                         TRADE_V6_ACACIA_SAPLING,
  91                         },
  92                 }
  93         },
  94         fisherman = {
  95                 name = "Fisherman",
  96                 texture = "mobs_mc_villager_farmer.png",
  97                 trades = {
  98                         {
  99                         { { "mcl_fishing:fish_raw", 6, 6, "mcl_core:emerald", 1, 1 }, { "mcl_fishing:fish_cooked", 6, 6 } },
 100                         { { "mcl_mobitems:string", 15, 20 }, E1 },
 101                         { { "mcl_core:coal_lump", 16, 24 }, E1 },
 102                         },
 103                         -- TODO: enchanted fishing rod
 104                 },
 105         },
 106         fletcher = {
 107                 name = "Fletcher",
 108                 texture = "mobs_mc_villager_farmer.png",
 109                 trades = {
 110                         {
 111                         { { "mcl_mobitems:string", 15, 20 }, E1 },
 112                         { E1, { "mcl_bows:arrow", 8, 12 } },
 113                         },
 114
 115                         {
 116                         { { "mcl_core:gravel", 10, 10, "mcl_core:emerald", 1, 1 }, { "mcl_core:flint", 6, 10 } },
 117                         { { "mcl_core:emerald", 2, 3 }, { "mcl_bows:bow", 1, 1 } },
 118                         },
 119                 }
 120         },
 121         shepherd ={
 122                 name = "Shepherd",
 123                 texture = "mobs_mc_villager_farmer.png",
 124                 trades = {
 125                         {
 126                         { { "mcl_wool:white", 16, 22 }, E1 },
 127                         { { "mcl_core:emerald", 3, 4 }, { "mcl_tools:shears", 1, 1 } },
 128                         },
 129
 130                         {
 131                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:white", 1, 1 } },
 132                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:grey", 1, 1 } },
 133                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:silver", 1, 1 } },
 134                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:black", 1, 1 } },
 135                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:yellow", 1, 1 } },
 136                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:orange", 1, 1 } },
 137                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:red", 1, 1 } },
 138                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:magenta", 1, 1 } },
 139                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:purple", 1, 1 } },
 140                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:blue", 1, 1 } },
 141                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:cyan", 1, 1 } },
 142                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:lime", 1, 1 } },
 143                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:green", 1, 1 } },
 144                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:pink", 1, 1 } },
 145                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:light_blue", 1, 1 } },
 146                         { { "mcl_core:emerald", 1, 2 }, { "mcl_wool:brown", 1, 1 } },
 147                         },
 148                 },
 149         },
 150         librarian = {
 151                 name = "Librarian",
 152                 texture = "mobs_mc_villager_librarian.png",
 153                 trades = {
 154                         {
 155                         { { "mcl_core:paper", 24, 36 }, E1 },
 156                         -- TODO: enchanted book
 157                         { { "mcl_books:book", 8, 10 }, E1 },
 158                         { { "mcl_core:emerald", 10, 12 }, { "mcl_compass:compass", 1 ,1 }},
 159                         { { "mcl_core:emerald", 3, 4 }, { "mcl_books:bookshelf", 1 ,1 }},
 160                         },
 161
 162                         {
 163                         { { "mcl_books:written_book", 2, 2 }, E1 },
 164                         { { "mcl_core:emerald", 10, 12 }, { "mcl_clock:clock", 1, 1 } },
 165                         { E1, { "mcl_core:glass", 3, 5 } },
 166                         },
 167
 168                         {
 169                         { E1, { "mcl_core:glass", 3, 5 } },
 170                         },
 171
 172                         -- TODO: 2 enchanted book tiers
 173
 174                         {
 175                         { { "mcl_core:emerald", 20, 22 }, { "mcl_mobs:nametag", 1, 1 } },
 176                         }
 177                 },
 178         },
 179         cartographer = {
 180                 name = "Cartographer",
 181                 texture = "mobs_mc_villager_librarian.png",
 182                 trades = {
 183                         {
 184                         { { "mcl_core:paper", 24, 36 }, E1 },
 185                         },
 186
 187                         {
 188                         -- subject to special checks
 189                         { { "mcl_compass:compass", 1, 1 }, E1 },
 190                         },
 191
 192                         {
 193                         -- TODO: replace with empty map
 194                         { { "mcl_core:emerald", 7, 11}, { "mcl_maps:filled_map", 1, 1 } },
 195                         },
 196
 197                         -- TODO: special maps
 198                 },
 199         },
 200         armorer = {
 201                 name = "Armorer",
 202                 texture = "mobs_mc_villager_smith.png",
 203                 trades = {
 204                         {
 205                         { { "mcl_core:coal_lump", 16, 24 }, E1 },
 206                         { { "mcl_core:emerald", 4, 6 }, { "3d_armor:helmet_iron", 1, 1 } },
 207                         },
 208
 209                         {
 210                         { { "mcl_core:iron_ingot", 7, 9 }, E1 },
 211                         { { "mcl_core:emerald", 10, 14 }, { "3d_armor:chestplate_iron", 1, 1 } },
 212                         },
 213
 214                         {
 215                         { { "mcl_core:diamond", 3, 4 }, E1 },
 216                         -- TODO: enchant
 217                         { { "mcl_core:emerald", 16, 19 }, { "3d_armor:chestplate_diamond", 1, 1 } },
 218                         },
 219
 220                         {
 221                         { { "mcl_core:emerald", 5, 7 }, { "3d_armor:boots_chain", 1, 1 } },
 222                         { { "mcl_core:emerald", 9, 11 }, { "3d_armor:leggings_chain", 1, 1 } },
 223                         { { "mcl_core:emerald", 5, 7 }, { "3d_armor:helmet_chain", 1, 1 } },
 224                         { { "mcl_core:emerald", 11, 15 }, { "3d_armor:chestplate_chain", 1, 1 } },
 225                         },
 226                 },
 227         },
 228         leatherworker = {
 229                 name = "Leatherworker",
 230                 texture = "mobs_mc_villager_butcher.png",
 231                 trades = {
 232                         {
 233                         { { "mcl_mobitems:leather", 9, 12 }, E1 },
 234                         { { "mcl_core:emerald", 2, 4 }, { "3d_armor:leggings_leather", 2, 4 } },
 235                         },
 236
 237                         {
 238                         -- TODO: enchant
 239                         { { "mcl_core:emerald", 7, 12 }, { "3d_armor:chestplate_leather", 1, 1 } },
 240                         },
 241
 242                         {
 243                         { { "mcl_core:emerald", 8, 10 }, { "mcl_mobitems:saddle", 1, 1 } },
 244                         },
 245                 },
 246         },
 247         butcher = {
 248                 name = "Butcher",
 249                 texture = "mobs_mc_villager_butcher.png",
 250                 trades = {
 251                         {
 252                         { { "mcl_mobitems:beef", 14, 18 }, E1 },
 253                         { { "mcl_mobitems:chicken", 14, 18 }, E1 },
 254                         },
 255
 256                         {
 257                         { { "mcl_core:coal_lump", 16, 24 }, E1 },
 258                         { E1, { "mcl_mobitems:cooked_beef", 5, 7 } },
 259                         { E1, { "mcl_mobitems:cooked_chicken", 6, 8 } },
 260                         },
 261                 },
 262         },
 263         weapon_smith = {
 264                 name = "Weapon Smith",
 265                 texture = "mobs_mc_villager_smith.png",
 266                 trades = {
 267                         {
 268                         { { "mcl_core:coal_lump", 16, 24 }, E1 },
 269                         { { "mcl_core:emerald", 6, 8 }, { "mcl_tools:axe_iron", 1, 1 } },
 270                         },
 271
 272                         {
 273                         { { "mcl_core:iron_ingot", 7, 9 }, E1 },
 274                         -- TODO: enchant
 275                         { { "mcl_core:emerald", 9, 10 }, { "mcl_tools:sword_iron", 1, 1 } },
 276                         },
 277
 278                         {
 279                         { { "mcl_core:diamond", 3, 4 }, E1 },
 280                         -- TODO: enchant
 281                         { { "mcl_core:emerald", 12, 15 }, { "mcl_tools:sword_diamond", 1, 1 } },
 282                         -- TODO: enchant
 283                         { { "mcl_core:emerald", 9, 12 }, { "mcl_tools:axe_diamond", 1, 1 } },
 284                         },
 285                 },
 286         },
 287         tool_smith = {
 288                 name = "Tool Smith",
 289                 texture = "mobs_mc_villager_smith.png",
 290                 trades = {
 291                         {
 292                         { { "mcl_core:coal_lump", 16, 24 }, E1 },
 293                         -- TODO: enchant
 294                         { { "mcl_core:emerald", 5, 7 }, { "mcl_tools:shovel_iron", 1, 1 } },
 295                         },
 296
 297                         {
 298                         { { "mcl_core:iron_ingot", 7, 9 }, E1 },
 299                         -- TODO: enchant
 300                         { { "mcl_core:emerald", 9, 11 }, { "mcl_tools:pick_iron", 1, 1 } },
 301                         },
 302
 303                         {
 304                         { { "mcl_core:diamond", 3, 4 }, E1 },
 305                         -- TODO: enchant
 306                         { { "mcl_core:emerald", 12, 15 }, { "mcl_tools:pick_diamond", 1, 1 } },
 307                         },
 308                 },
 309         },
 310         cleric = {
 311                 name = "Cleric",
 312                 texture = "mobs_mc_villager_priest.png",
 313                 trades = {
 314                         {
 315                         { { "mcl_mobitems:rotten_flesh", 36, 40 }, E1 },
 316                         { { "mcl_core:gold_ingot", 8, 10 }, E1 },
 317                         },
 318
 319                         {
 320                         { E1, { "mesecons:redstone", 1, 4  } },
 321                         { E1, { "mcl_dye:blue", 1, 2 } },
 322                         },
 323
 324                         {
 325                         TRADE_V6_RED_SANDSTONE,
 326                         { E1, { "mcl_nether:glowstone", 1, 3 } },
 327                         { { "mcl_core:emerald", 4, 7 }, { "mcl_throwing:ender_pearl", 1, 1 } },
 328                         },
 329
 330                         -- TODO: Bottle 'o enchanting
 331                 },
 332         },
 333         nitwit = {
 334                 name = "Nitwit",
 335                 texture = "mobs_mc_villager.png",
 336                 -- No trades for nitwit
 337                 trades = nil,
 338         }
 339 }
 340
 341 local profession_names = {}
 342 for id, _ in pairs(professions) do
 343         table.insert(profession_names, id)
 344 end
 345
 346 local stand_still = function(self)
 347         self.walk_chance = 0
 348         self.jump = false
 349 end
 350
 351 local update_max_tradenum = function(self)
 352         if not self._trades then
 353                 return
 354         end
 355         local trades = minetest.deserialize(self._trades)
 356         for t=1, #trades do
 357                 local trade = trades[t]
 358                 if trade.tier > self._max_trade_tier then
 359                         self._max_tradenum = t - 1
 360                         return
 361                 end
 362         end
 363         self._max_tradenum = #trades
 364 end
 365
 366 local init_trader_vars = function(self)
 367         if not self._profession then
 368                 -- Select random profession from all professions with matching clothing
 369                 local texture = self.base_texture[1]
 370                 local matches = {}
 371                 for prof_id, prof in pairs(professions) do
 372                         if texture == prof.texture then
 373                                 table.insert(matches, prof_id)
 374                         end
 375                 end
 376                 local p = math.random(1, #matches)
 377                 self._profession = matches[p]
 378         end
 379         if not self._max_trade_tier then
 380                 self._max_trade_tier = 1
 381         end
 382         if not self._locked_trades then
 383                 self._locked_trades = 0
 384         end
 385         if not self._trading_players then
 386                 self._trading_players = {}
 387         end
 388 end
 389
 390 local init_trades = function(self, inv)
 391         local profession = professions[self._profession]
 392         local trade_tiers = profession.trades
 393         if trade_tiers == nil then
 394                 -- Empty trades
 395                 self._trades = false
 396                 return
 397         end
 398
 399         local max_tier = #trade_tiers
 400         local trades = {}
 401         for tiernum=1, max_tier do
 402                 local tier = trade_tiers[tiernum]
 403                 for tradenum=1, #tier do
 404                         local trade = tier[tradenum]
 405                         local wanted1_item = trade[1][1]
 406                         local wanted1_count = math.random(trade[1][2], trade[1][3])
 407                         local offered_item = trade[2][1]
 408                         local offered_count = math.random(trade[2][2], trade[2][3])
 409
 410                         local wanted = { wanted1_item .. " " ..wanted1_count }
 411                         if trade[1][4] then
 412                                 local wanted2_item = trade[1][4]
 413                                 local wanted2_count = math.random(trade[1][5], trade[1][6])
 414                                 table.insert(wanted, wanted2_item .. " " ..wanted2_count)
 415                         end
 416
 417                         table.insert(trades, {
 418                                 wanted = wanted,
 419                                 offered = offered_item .. " " .. offered_count,
 420                                 tier = tiernum, -- tier of this trade
 421                                 traded_once = false, -- true if trade was traded at least once
 422                                 trade_counter = 0, -- how often the this trade was mate after the last time it got unlocked
 423                                 locked = false, -- if this trade is locked. Locked trades can't be used
 424                         })
 425                 end
 426         end
 427         self._trades = minetest.serialize(trades)
 428 end
 429
 430 local set_trade = function(trader, player, inv, concrete_tradenum)
 431         local trades = minetest.deserialize(trader._trades)
 432         if not trades then
 433                 init_trades(trader)
 434                 trades = minetest.deserialize(trader._trades)
 435                 if not trades then
 436                         minetest.log("error", "[mobs_mc] Failed to select villager trade!")
 437                         return
 438                 end
 439         end
 440         local name = player:get_player_name()
 441
 442         -- Stop tradenum from advancing into locked tiers or out-of-range areas
 443         if concrete_tradenum > trader._max_tradenum then
 444                 concrete_tradenum = trader._max_tradenum
 445         elseif concrete_tradenum < 1 then
 446                 concrete_tradenum = 1
 447         end
 448         player_tradenum[name] = concrete_tradenum
 449         local trade = trades[concrete_tradenum]
 450         inv:set_stack("wanted", 1, ItemStack(trade.wanted[1]))
 451         inv:set_stack("offered", 1, ItemStack(trade.offered))
 452         if trade.wanted[2] then
 453                 local wanted2 = ItemStack(trade.wanted[2])
 454                 inv:set_stack("wanted", 2, wanted2)
 455         else
 456                 inv:set_stack("wanted", 2, "")
 457         end
 458
 459 end
 460
 461 local function show_trade_formspec(playername, trader, tradenum)
 462         if not trader._trades then
 463                 return
 464         end
 465         if not tradenum then
 466                 tradenum = 1
 467         end
 468         local trades = minetest.deserialize(trader._trades)
 469         local trade = trades[tradenum]
 470         local profession = professions[trader._profession].name
 471         local disabled_img = ""
 472         if trade.locked then
 473                 disabled_img = "image[4.3,2.52;1,1;mobs_mc_trading_formspec_disabled.png]"..
 474                         "image[4.3,1.1;1,1;mobs_mc_trading_formspec_disabled.png]"
 475         end
 476         local tradeinv_name = "mobs_mc:trade_"..playername
 477         local tradeinv = minetest.formspec_escape("detached:"..tradeinv_name)
 478
 479         local b_prev, b_next = "", ""
 480         if #trades > 1 then
 481                 if tradenum > 1 then
 482                         b_prev = "button[1,1;0.5,1;prev_trade;<]"
 483                 end
 484                 if tradenum < trader._max_tradenum then
 485                         b_next = "button[7.26,1;0.5,1;next_trade;>]"
 486                 end
 487         end
 488
 489         local formspec =
 490         "size[9,8.75]"
 491         .."background[-0.19,-0.25;9.41,9.49;mobs_mc_trading_formspec_bg.png]"
 492         ..disabled_img
 493         ..mcl_vars.inventory_header
 494         .."label[4,0;"..minetest.formspec_escape(profession).."]"
 495         .."list[current_player;main;0,4.5;9,3;9]"
 496         .."list[current_player;main;0,7.74;9,1;]"
 497         ..b_prev..b_next
 498         .."list["..tradeinv..";wanted;2,1;2,1;]"
 499         .."list["..tradeinv..";offered;5.76,1;1,1;]"
 500         .."list["..tradeinv..";input;2,2.5;2,1;]"
 501         .."list["..tradeinv..";output;5.76,2.55;1,1;]"
 502         .."listring["..tradeinv..";output]"
 503         .."listring[current_player;main]"
 504         .."listring["..tradeinv..";input]"
 505         .."listring[current_player;main]"
 506         minetest.sound_play("mobs_mc_villager_trade", {to_player = playername})
 507         minetest.show_formspec(playername, tradeinv_name, formspec)
 508 end
 509
 510 local update_offer = function(inv, player, sound)
 511         local name = player:get_player_name()
 512         local trader = player_trading_with[name]
 513         local tradenum = player_tradenum[name]
 514         if not trader or not tradenum then
 515                 return false
 516         end
 517         local trades = minetest.deserialize(trader._trades)
 518         if not trades then
 519                 return false
 520         end
 521         local trade = trades[tradenum]
 522         if not trade then
 523                 return false
 524         end
 525         local wanted1, wanted2 = inv:get_stack("wanted", 1), inv:get_stack("wanted", 2)
 526         local input1, input2 = inv:get_stack("input", 1), inv:get_stack("input", 2)
 527
 528         -- BEGIN OF SPECIAL HANDLING OF COMPASS
 529         -- These 2 functions are a complicated check to check if the input contains a
 530         -- special item which we cannot check directly against their name, like
 531         -- compass.
 532         -- TODO: Remove these check functions when compass and clock are implemented
 533         -- as single items.
 534         local check_special = function(special_item, group, wanted1, wanted2, input1, input2)
 535                 if minetest.registered_aliases[special_item] then
 536                         special_item = minetest.registered_aliases[special_item]
 537                 end
 538                 if wanted1:get_name() == special_item then
 539                         local check_input = function(input, wanted, group)
 540                                 return minetest.get_item_group(input:get_name(), group) ~= 0 and input:get_count() >= wanted:get_count()
 541                         end
 542                         if check_input(input1, wanted1, group) then
 543                                 return true
 544                         elseif check_input(input2, wanted1, group) then
 545                                 return true
 546                         else
 547                                 return false
 548                         end
 549                 end
 550                 return false
 551         end
 552         -- Apply above function to all items which we consider special.
 553         -- This function succeeds if ANY item check succeeds.
 554         local check_specials = function(wanted1, wanted2, input1, input2)
 555                 return check_special(COMPASS, "compass", wanted1, wanted2, input1, input2)
 556         end
 557         -- END OF SPECIAL HANDLING OF COMPASS
 558
 559         if (
 560                         ((inv:contains_item("input", wanted1) and
 561                         (wanted2:is_empty() or inv:contains_item("input", wanted2))) or
 562                         -- BEGIN OF SPECIAL HANDLING OF COMPASS
 563                         check_specials(wanted1, wanted2, input1, input2)) and
 564                         -- END OF SPECIAL HANDLING OF COMPASS
 565                         (trade.locked == false)) then
 566                 inv:set_stack("output", 1, inv:get_stack("offered", 1))
 567                 if sound then
 568                         minetest.sound_play("mobs_mc_villager_accept", {to_player = name})
 569                 end
 570                 return true
 571         else
 572                 inv:set_stack("output", 1, ItemStack(""))
 573                 if sound then
 574                         minetest.sound_play("mobs_mc_villager_deny", {to_player = name})
 575                 end
 576                 return false
 577         end
 578 end
 579
 580 -- Returns a single itemstack in the given inventory to the player's main inventory, or drop it when there's no space left
 581 local function return_item(itemstack, dropper, pos, inv_p)
 582         if dropper:is_player() then
 583                 -- Return to main inventory
 584                 if inv_p:room_for_item("main", itemstack) then
 585                         inv_p:add_item("main", itemstack)
 586                 else
 587                         -- Drop item on the ground
 588                         local v = dropper:get_look_dir()
 589                         local p = {x=pos.x, y=pos.y+1.2, z=pos.z}
 590                         p.x = p.x+(math.random(1,3)*0.2)
 591                         p.z = p.z+(math.random(1,3)*0.2)
 592                         local obj = minetest.add_item(p, itemstack)
 593                         if obj then
 594                                 v.x = v.x*4
 595                                 v.y = v.y*4 + 2
 596                                 v.z = v.z*4
 597                                 obj:setvelocity(v)
 598                                 obj:get_luaentity()._insta_collect = false
 599                         end
 600                 end
 601         else
 602                 -- Fallback for unexpected cases
 603                 minetest.add_item(pos, itemstack)
 604         end
 605         return itemstack
 606 end
 607
 608 local return_fields = function(player)
 609         local name = player:get_player_name()
 610         local inv_t = minetest.get_inventory({type="detached", name = "mobs_mc:trade_"..name})
 611         local inv_p = player:get_inventory()
 612         for i=1, inv_t:get_size("input") do
 613                 local stack = inv_t:get_stack("input", i)
 614                 return_item(stack, player, player:get_pos(), inv_p)
 615                 stack:clear()
 616                 inv_t:set_stack("input", i, stack)
 617         end
 618         inv_t:set_stack("output", 1, "")
 619 end
 620
 621 minetest.register_on_player_receive_fields(function(player, formname, fields)
 622         if string.sub(formname, 1, 14) == "mobs_mc:trade_" then
 623                 local name = player:get_player_name()
 624                 if fields.quit then
 625                         -- Get input items back
 626                         return_fields(player)
 627                         -- Reset internal "trading with" state
 628                         local trader = player_trading_with[name]
 629                         if trader then
 630                                 trader._trading_players[name] = nil
 631                         end
 632                         player_trading_with[name] = nil
 633                 elseif fields.next_trade or fields.prev_trade then
 634                         local trader = player_trading_with[name]
 635                         if not trader or not trader.object:get_luaentity() then
 636                                 return
 637                         end
 638                         local trades = trader._trades
 639                         if not trades then
 640                                 return
 641                         end
 642                         local dir = 1
 643                         if fields.prev_trade then
 644                                 dir = -1
 645                         end
 646                         local tradenum = player_tradenum[name] + dir
 647                         local inv = minetest.get_inventory({type="detached", name="mobs_mc:trade_"..name})
 648                         set_trade(trader, player, inv, tradenum)
 649                         update_offer(inv, player, false)
 650                         show_trade_formspec(name, trader, player_tradenum[name])
 651                 end
 652         end
 653 end)
 654
 655 minetest.register_on_leaveplayer(function(player)
 656         return_fields(player)
 657         player_tradenum[player:get_player_name()] = nil
 658         local trader = player_trading_with[name]
 659         if trader then
 660                 trader._trading_players[name] = nil
 661         end
 662         player_trading_with[player:get_player_name()] = nil
 663
 664 end)
 665
 666 -- Return true if player is trading with villager, and the villager entity exists
 667 local trader_exists = function(playername)
 668         local trader = player_trading_with[playername]
 669         return trader ~= nil and trader.object:get_luaentity() ~= nil
 670 end
 671
 672 local trade_inventory = {
 673         allow_take = function(inv, listname, index, stack, player)
 674                 if listname == "input" then
 675                         return stack:get_count()
 676                 elseif listname == "output" then
 677                         if not trader_exists(player:get_player_name()) then
 678                                 return 0
 679                         end
 680                         -- Only allow taking full stack
 681                         local count = stack:get_count()
 682                         if count == inv:get_stack(listname, index):get_count() then
 683                                 -- Also update output stack again.
 684                                 -- If input has double the wanted items, the
 685                                 -- output will stay because there will be still
 686                                 -- enough items in input after the trade
 687                                 local wanted1 = inv:get_stack("wanted", 1)
 688                                 local wanted2 = inv:get_stack("wanted", 2)
 689                                 local input1 = inv:get_stack("input", 1)
 690                                 local input2 = inv:get_stack("input", 2)
 691                                 wanted1:set_count(wanted1:get_count()*2)
 692                                 wanted2:set_count(wanted2:get_count()*2)
 693                                 -- BEGIN OF SPECIAL HANDLING FOR COMPASS
 694                                 local special_checks = function(wanted1, input1, input2)
 695                                         if wanted1:get_name() == COMPASS then
 696                                                 local compasses = 0
 697                                                 if (minetest.get_item_group(input1:get_name(), "compass") ~= 0) then
 698                                                         compasses = compasses + input1:get_count()
 699                                                 end
 700                                                 if (minetest.get_item_group(input2:get_name(), "compass") ~= 0) then
 701                                                         compasses = compasses + input2:get_count()
 702                                                 end
 703                                                 return compasses >= wanted1:get_count()
 704                                         end
 705                                         return false
 706                                 end
 707                                 -- END OF SPECIAL HANDLING FOR COMPASS
 708                                 if (inv:contains_item("input", wanted1) and
 709                                         (wanted2:is_empty() or inv:contains_item("input", wanted2)))
 710                                         -- BEGIN OF SPECIAL HANDLING FOR COMPASS
 711                                         or special_checks(wanted1, input1, input2) then
 712                                         -- END OF SPECIAL HANDLING FOR COMPASS
 713                                         return -1
 714                                 else
 715                                         -- If less than double the wanted items,
 716                                         -- remove items from output (final trade,
 717                                         -- input runs empty)
 718                                         return count
 719                                 end
 720                         else
 721                                 return 0
 722                         end
 723                 else
 724                         return 0
 725                 end
 726         end,
 727         allow_move = function(inv, from_list, from_index, to_list, to_index, count, player)
 728                 if from_list == "input" and to_list == "input" then
 729                         return count
 730                 elseif from_list == "output" and to_list == "input" then
 731                         if not trader_exists(player:get_player_name()) then
 732                                 return 0
 733                         end
 734                         local move_stack = inv:get_stack(from_list, from_index)
 735                         if inv:get_stack(to_list, to_index):item_fits(move_stack) then
 736                                 return count
 737                         end
 738                 end
 739                 return 0
 740         end,
 741         allow_put = function(inv, listname, index, stack, player)
 742                 if listname == "input" then
 743                         if not trader_exists(player:get_player_name()) then
 744                                 return 0
 745                         else
 746                                 return stack:get_count()
 747                         end
 748                 else
 749                         return 0
 750                 end
 751         end,
 752         on_put = function(inv, listname, index, stack, player)
 753                 update_offer(inv, player, true)
 754         end,
 755         on_move = function(inv, from_list, from_index, to_list, to_index, count, player)
 756                 if from_list == "output" and to_list == "input" then
 757                         inv:remove_item("input", inv:get_stack("wanted", 1))
 758                         local wanted2 = inv:get_stack("wanted", 2)
 759                         if not wanted2:is_empty() then
 760                                 inv:remove_item("input", inv:get_stack("wanted", 2))
 761                         end
 762                         minetest.sound_play("mobs_mc_villager_accept", {to_player = player:get_player_name()})
 763                 end
 764                 update_offer(inv, player, true)
 765         end,
 766         on_take = function(inv, listname, index, stack, player)
 767                 local accept
 768                 local name = player:get_player_name()
 769                 if listname == "output" then
 770                         local wanted1 = inv:get_stack("wanted", 1)
 771                         inv:remove_item("input", wanted1)
 772                         local wanted2 = inv:get_stack("wanted", 2)
 773                         if not wanted2:is_empty() then
 774                                 inv:remove_item("input", inv:get_stack("wanted", 2))
 775                         end
 776                         -- BEGIN OF SPECIAL HANDLING FOR COMPASS
 777                         if wanted1:get_name() == COMPASS then
 778                                 for n=1, 2 do
 779                                         local input = inv:get_stack("input", n)
 780                                         if minetest.get_item_group(input:get_name(), "compass") ~= 0 then
 781                                                 input:set_count(input:get_count() - wanted1:get_count())
 782                                                 inv:set_stack("input", n, input)
 783                                                 break
 784                                         end
 785                                 end
 786                         end
 787                         -- END OF SPECIAL HANDLING FOR COMPASS
 788                         local trader = player_trading_with[name]
 789                         local tradenum = player_tradenum[name]
 790                         local trades
 791                         if trader and trader._trades then
 792                                 trades = minetest.deserialize(trader._trades)
 793                         end
 794                         if trades then
 795                                 local trade = trades[tradenum]
 796                                 local unlock_stuff = false
 797                                 if not trade.traded_once then
 798                                         -- Unlock all the things if something was traded
 799                                         -- for the first time ever
 800                                         unlock_stuff = true
 801                                         trade.traded_once = true
 802                                 elseif trade.trade_counter == 0 and math.random(1,5) == 1 then
 803                                         -- Otherwise, 20% chance to unlock if used freshly reset trade
 804                                         unlock_stuff = true
 805                                 end
 806                                 local update_formspec = false
 807                                 if unlock_stuff then
 808                                         -- First-time trade unlock all trades and unlock next trade tier
 809                                         if trade.tier + 1 > trader._max_trade_tier then
 810                                                 trader._max_trade_tier = trader._max_trade_tier + 1
 811                                                 update_max_tradenum(trader)
 812                                                 update_formspec = true
 813                                         end
 814                                         for t=1, #trades do
 815                                                 trades[t].locked = false
 816                                                 trades[t].trade_counter = 0
 817                                         end
 818                                         trader._locked_trades = 0
 819                                         -- Also heal trader for unlocking stuff
 820                                         -- TODO: Replace by Regeneration I
 821                                         trader.health = math.min(trader.hp_max, trader.health + 4)
 822                                 end
 823                                 trade.trade_counter = trade.trade_counter + 1
 824                                 -- Semi-randomly lock trade for repeated trade (not if there's only 1 trade)
 825                                 if trader._max_tradenum > 1 then
 826                                         if trade.trade_counter >= 12 then
 827                                                 trade.locked = true
 828                                         elseif trade.trade_counter >= 2 then
 829                                                 local r = math.random(1, math.random(4, 10))
 830                                                 if r == 1 then
 831                                                         trade.locked = true
 832                                                 end
 833                                         end
 834                                 end
 835
 836                                 if trade.locked then
 837                                         inv:set_stack("output", 1, "")
 838                                         update_formspec = true
 839                                         trader._locked_trades = trader._locked_trades + 1
 840                                         -- Check if we managed to lock ALL available trades. Rare but possible.
 841                                         if trader._locked_trades >= trader._max_tradenum then
 842                                                 -- Emergency unlock! Unlock all other trades except the current one
 843                                                 for t=1, #trades do
 844                                                         if t ~= tradenum then
 845                                                                 trades[t].locked = false
 846                                                                 trades[t].trade_counter = 0
 847                                                         end
 848                                                 end
 849                                                 trader._locked_trades = 1
 850                                                 -- Also heal trader for unlocking stuff
 851                                                 -- TODO: Replace by Regeneration I
 852                                                 trader.health = math.min(trader.hp_max, trader.health + 4)
 853                                         end
 854                                 end
 855                                 trader._trades = minetest.serialize(trades)
 856                                 if update_formspec then
 857                                         show_trade_formspec(name, trader, tradenum)
 858                                 end
 859                         else
 860                                 minetest.log("error", "[mobs_mc] Player took item from trader output but player_trading_with or player_tradenum is nil!")
 861                         end
 862
 863                         accept = true
 864                 elseif listname == "input" then
 865                         update_offer(inv, player, false)
 866                 end
 867                 if accept then
 868                         minetest.sound_play("mobs_mc_villager_accept", {to_player = name})
 869                 else
 870                         minetest.sound_play("mobs_mc_villager_deny", {to_player = name})
 871                 end
 872         end,
 873 }
 874
 875 minetest.register_on_joinplayer(function(player)
 876         local name = player:get_player_name()
 877         player_tradenum[name] = 1
 878         player_trading_with[name] = nil
 879
 880         -- Create or get player-specific trading inventory
 881         local inv = minetest.get_inventory({type="detached", name="mobs_mc:trade_"..name})
 882         if not inv then
 883                 inv = minetest.create_detached_inventory("mobs_mc:trade_"..name, trade_inventory, name)
 884         end
 885         inv:set_size("input", 2)
 886         inv:set_size("output", 1)
 887         inv:set_size("wanted", 2)
 888         inv:set_size("offered", 1)
 889 end)
 890
 891 --[=======[ MOB REGISTRATION AND SPAWNING ]=======]
 892
 893 mobs:register_mob("mobs_mc:villager", {
 894         type = "npc",
 895         hp_min = 20,
 896         hp_max = 20,
 897         collisionbox = {-0.3, -0.01, -0.3, 0.3, 1.94, 0.3},
 898         visual = "mesh",
 899         mesh = "mobs_mc_villager.b3d",
 900         textures = {
 901         {
 902                 "mobs_mc_villager.png",
 903                 "mobs_mc_villager.png", --hat
 904         },
 905         {
 906                 "mobs_mc_villager_farmer.png",
 907                 "mobs_mc_villager_farmer.png", --hat
 908         },
 909         {
 910                 "mobs_mc_villager_priest.png",
 911                 "mobs_mc_villager_priest.png", --hat
 912         },
 913         {
 914                 "mobs_mc_villager_librarian.png",
 915                 "mobs_mc_villager_librarian.png", --hat
 916         },
 917         {
 918                 "mobs_mc_villager_butcher.png",
 919                 "mobs_mc_villager_butcher.png", --hat
 920         },
 921         {
 922                 "mobs_mc_villager_smith.png",
 923                 "mobs_mc_villager_smith.png", --hat
 924         },
 925         },
 926         visual_size = {x=3, y=3},
 927         makes_footstep_sound = true,
 928         walk_velocity = 1.2,
 929         run_velocity = 2.4,
 930         drops = {},
 931         sounds = {
 932                 random = "mobs_mc_villager_noise",
 933                 death = "mobs_mc_villager_death",
 934                 damage = "mobs_mc_villager_damage",
 935                 distance = 16,
 936         },
 937         animation = {
 938                 stand_speed = 25,
 939                 stand_start = 40,
 940                 stand_end = 59,
 941                 walk_speed = 25,
 942                 walk_start = 0,
 943                 walk_end = 40,
 944                 run_speed = 25,
 945                 run_start = 0,
 946                 run_end = 40,
 947                 die_speed = 15,
 948                 die_start = 210,
 949                 die_end = 220,
 950                 die_loop = false,
 951         },
 952         water_damage = 0,
 953         lava_damage = 4,
 954         light_damage = 0,
 955         view_range = 16,
 956         fear_height = 4,
 957         jump = true,
 958         walk_chance = DEFAULT_WALK_CHANCE,
 959         on_rightclick = function(self, clicker)
 960                 -- Initiate trading
 961                 local name = clicker:get_player_name()
 962                 self._trading_players[name] = true
 963
 964                 init_trader_vars(self)
 965                 if self._trades == nil then
 966                         init_trades(self)
 967                 end
 968                 update_max_tradenum(self)
 969                 if self._trades == false then
 970                         -- Villager has no trades, rightclick is a no-op
 971                         return
 972                 end
 973
 974                 player_trading_with[name] = self
 975
 976                 local inv = minetest.get_inventory({type="detached", name="mobs_mc:trade_"..name})
 977
 978                 set_trade(self, clicker, inv, 1)
 979
 980                 show_trade_formspec(name, self)
 981
 982                 -- Behaviour stuff:
 983                 -- Make villager look at player and stand still
 984                 local selfpos = self.object:get_pos()
 985                 local clickerpos = clicker:get_pos()
 986                 local dir = vector.direction(selfpos, clickerpos)
 987                 self.object:set_yaw(minetest.dir_to_yaw(dir))
 988                 stand_still(self)
 989         end,
 990
 991         _player_scan_timer = 0,
 992         _trading_players = {}, -- list of playernames currently trading with villager (open formspec)
 993         do_custom = function(self, dtime)
 994                 -- Stand still if player is nearby.
 995                 if not self._player_scan_timer then
 996                         self._player_scan_timer = 0
 997                 end
 998                 self._player_scan_timer = self._player_scan_timer + dtime
 999                 -- Check infrequently to keep CPU load low
1000                 if self._player_scan_timer > PLAYER_SCAN_INTERVAL then
1001                         self._player_scan_timer = 0
1002                         local selfpos = self.object:get_pos()
1003                         local objects = minetest.get_objects_inside_radius(selfpos, PLAYER_SCAN_RADIUS)
1004                         local has_player = false
1005                         for o, obj in pairs(objects) do
1006                                 if obj:is_player() then
1007                                         has_player = true
1008                                         break
1009                                 end
1010                         end
1011                         if has_player then
1012                                 minetest.log("verbose", "[mobs_mc] Player near villager found!")
1013                                 stand_still(self)
1014                         else
1015                                 minetest.log("verbose", "[mobs_mc] No player near villager found!")
1016                                 self.walk_chance = DEFAULT_WALK_CHANCE
1017                                 self.jump = true
1018                         end
1019                 end
1020         end,
1021
1022         on_spawn = function(self)
1023                 init_trader_vars(self)
1024         end,
1025         on_die = function(self, pos)
1026                 -- Close open trade formspecs and give input back to players
1027                 local trading_players = self._trading_players
1028                 for name, _ in pairs(trading_players) do
1029                         minetest.close_formspec(name, "mobs_mc:trade_"..name)
1030                         local player = minetest.get_player_by_name(name)
1031                         if player then
1032                                 return_fields(player)
1033                         end
1034                 end
1035         end,
1036 })
1037
1038
1039
1040 mobs:spawn_specific("mobs_mc:villager", mobs_mc.spawn.village, {"air"}, 0, minetest.LIGHT_MAX+1, 30, 8000, 4, mobs_mc.spawn_height.water+1, mobs_mc.spawn_height.overworld_max)
1041
1042 -- compatibility
1043 mobs:alias_mob("mobs:villager", "mobs_mc:villager")
1044
1045 -- spawn eggs
1046 mobs:register_egg("mobs_mc:villager", S("Villager"), "mobs_mc_spawn_icon_villager.png", 0)
1047
1048 if minetest.settings:get_bool("log_mods") then
1049         minetest.log("action", "MC mobs loaded")
1050 end