summaryrefslogtreecommitdiff
path: root/init.lua
blob: 1d9bf74d9253ba0d7eafe5a9eb89b0149598cfc9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
smartshop={user={},tmp={},dir={{x=0,y=0,z=-1},{x=-1,y=0,z=0},{x=0,y=0,z=1},{x=1,y=0,z=0}},dpos={
{{x=0.2,y=0.2,z=0},{x=-0.2,y=0.2,z=0},{x=0.2,y=-0.2,z=0},{x=-0.2,y=-0.2,z=0}},
{{x=0,y=0.2,z=0.2},{x=0,y=0.2,z=-0.2},{x=0,y=-0.2,z=0.2},{x=0,y=-0.2,z=-0.2}},
{{x=-0.2,y=0.2,z=0},{x=0.2,y=0.2,z=0},{x=-0.2,y=-0.2,z=0},{x=0.2,y=-0.2,z=0}},
{{x=0,y=0.2,z=-0.2},{x=0,y=0.2,z=0.2},{x=0,y=-0.2,z=-0.2},{x=0,y=-0.2,z=0.2}}}
}

-- table with itemname: number of items being traded
smartshop.itemstats = {}
smartshop.itemprices = {}
smartshop.stuffsold = {}



smartshop.itemsatpos = function(pos, item, count)
   -- set number of items of type 'item' sold at position 'pos'
   if smartshop.itemstats[item] == nil then
      smartshop.itemstats[item] = {}
   end
   smartshop.itemstats[item][pos] = count
   local file = io.open(minetest.get_worldpath().."/smartshop_itemcounts.txt", "w")
   if file then
      file:write(minetest.serialize(smartshop.itemstats))
      file:close()
   end
end

smartshop.itempriceatpos = function(pos, item, price)
   -- set number of items of type 'item' sold at position 'pos'
   if smartshop.itemprices[item] == nil then
      smartshop.itemprices[item] = {}
   end
   local file = io.open(minetest.get_worldpath().."/smartshop_itemprices.txt", "w")
   if file then
      file:write(minetest.serialize(smartshop.itemprices))
      file:close()
   end
   smartshop.itemprices[item][pos] = price
end

smartshop.minegeldtonumber = function(stack)
   -- return number of minegeld in stack, returns nil if stack is not composed of minegeld
   count = stack:get_count()
   if count == 0 then
      return 0
   end
   if stack:get_name() == "currency:minegeld" then
      return count
   elseif stack:get_name() == "currency:minegeld_5" then
      return count * 5
   elseif stack:get_name() == "currency:minegeld_10" then
      return count * 10
   elseif stack:get_name() == "currency:minegeld_50" then
      return count * 50
   else
      return nil
   end
end


minetest.register_craft({
	output = "smartshop:shop",
	recipe = {
		{"default:chest_locked", "default:chest_locked", "default:chest_locked"},
		{"default:sign_wall_wood", "default:chest_locked", "default:sign_wall_wood"},
		{"default:sign_wall_wood", "default:torch", "default:sign_wall_wood"},
	}
})
smartshop.get_human_name = function(item)
   if core.registered_items[item] then
      return core.registered_items[item].description
   else
      return "Unknown Item"
   end
end

smartshop.use_offer=function(pos,player,n)
	local pressed={}
	pressed["buy" .. n]=true
	smartshop.user[player:get_player_name()]=pos
	smartshop.receive_fields(player,pressed)
	smartshop.user[player:get_player_name()]=nil
	smartshop.update(pos)
end

smartshop.get_offer=function(pos)
	if not pos or not minetest.get_node(pos) then return end
	if minetest.get_node(pos).name~="smartshop:shop" then return end
	local meta=minetest.get_meta(pos)
	local inv=meta:get_inventory()
	local offer={}
	for i=1,4,1 do
		local pay_stack = inv:get_stack("pay" .. i,1);
		local give_stock = 0;
		offer[i]={
			give=inv:get_stack("give" .. i,1):get_name(),
			give_count=inv:get_stack("give" .. i,1):get_count(),
			pay=pay_stack:get_name(),
			pay_count=pay_stack:get_count(),
			stock = 0,		-- times customer can purchase before sold out
			pay_price = 0,	-- average minegeld price of sold item, nonzero for minegeld-taking selling shop
		}
		local mg_price = smartshop.minegeldtonumber(pay_stack)
		if mg_price ~= nil then
			offer[i].pay_price = mg_price/offer[i].give_count
		end
		for ii=1,32,1 do
			local name=inv:get_stack("main",ii):get_name()
			local count=inv:get_stack("main",ii):get_count()
			if name==offer[i].give then
				give_stock = give_stock + count
			end
		end
		offer[i].stock = math.floor(give_stock/offer[i].give_count)
	end
	return offer
end

smartshop.send_mail=function(owner, pos, item, pname)
   if not minetest.get_modpath( "mail" ) then
      return
   end
   local spos = "("..pos.x..", "..pos.y..", "..pos.z..")"
   mail.send("DO NOT REPLY", owner, "Out of "..smartshop.get_human_name(item).." at "..spos, "Your smartshop at "..spos.." is out of "..smartshop.get_human_name(item)..". Please restock! Thanks, " .. pname)
end

local function is_creative(pname)
	return minetest.check_player_privs(pname, {creative=true}) or minetest.check_player_privs(pname, {give=true})
end

smartshop.receive_fields=function(player,pressed)
	local pname = player:get_player_name()
	if not smartshop.user[pname] then
		return
	end
	local pos = smartshop.user[pname][1]
	local owner = smartshop.user[pname][2]
	if not pos then
		return
	end
		if pressed.customer then
			return smartshop.showform(pos, player, true)
		elseif pressed.tooglelime then
			local meta=minetest.get_meta(pos)
			if not is_creative(pname) then
				meta:set_int("type", 1)
				meta:set_int("creative", 0)
				minetest.chat_send_player(pname, "You are not allowed to make a creative shop!")
				return
			end
			if meta:get_int("type")==0 then
				meta:set_int("type",1)
				minetest.chat_send_player(pname, "Your stock is limited")
			else
				meta:set_int("type",0)
				minetest.chat_send_player(pname, "Your stock is unlimited")
			end
			return smartshop.showform(pos, player)
		elseif pressed.channel and owner then
			local meta=minetest.get_meta(pos)
			meta:set_string("channel",pressed.channel)
		elseif not pressed.quit then
			local n=1
			for i=1,4,1 do
				n=i
				if pressed["buy" .. i] then break end
			end
			local meta=minetest.get_meta(pos)
			local type=meta:get_int("type")
			local inv=meta:get_inventory()
			local pinv=player:get_inventory()
			if pressed["buy" .. n] then
				local stack=inv:get_stack("give" .. n,1)
				local name=stack:get_name()
				local pay=inv:get_stack("pay" .. n,1)
				if name~="" then
					if type==1 and inv:room_for_item("main", pay)==false then minetest.chat_send_player(pname, "Error: The owner's stock is full, can't receive, exchange aborted.") return end
					if meta:get_int("ghost") ~=1 then
					   -- transition shops to ghost inventory.
					   for i=1,4 do
					      if inv:room_for_item("main", "pay"..i) and inv:room_for_item("main", "give"..i) then
								meta:set_int("ghost", 1)
								inv:add_item("main", inv:get_stack("pay"..i,1))
								inv:add_item("main", inv:get_stack("give"..i,1))
					      end
					   end
					end
					if type==1 and inv:contains_item("main", stack)==false then
					   minetest.chat_send_player(pname, "Error: "..smartshop.get_human_name(name).." is sold out.")
					   if not meta:get_int("alerted") or meta:get_int("alerted") == 0 then
					      meta:set_int("alerted",1) -- Do not alert twice
					      smartshop.send_mail(meta:get_string("owner"), pos, name, pname)
					   end
					   return
					end
					if not pinv:contains_item("main", pay) then minetest.chat_send_player(pname, "Error: You don't have enough in your inventory to buy this, exchange aborted.") return end
					if not pinv:room_for_item("main", stack) then minetest.chat_send_player(pname, "Error: Your inventory is full, exchange aborted.") return end
					if type == 0 then
						pinv:remove_item("main", pay)
						pinv:add_item("main", stack)
					else
						local item = inv:remove_item("main", stack)
						pinv:add_item("main", item)
						item = pinv:remove_item("main",pay)
						inv:add_item("main", item)
						if not inv:contains_item("main", stack)  and (not meta:get_int("alerted") or meta:get_int("alerted") == 0) then
						   meta:set_int("alerted",1) -- Do not alert twice
						   smartshop.send_mail(meta:get_string("owner"), pos, name, pname)
						end
					end
				end
			end
		else
			smartshop.update_info(pos)
			local meta = minetest.get_meta(pos)
			if meta:get_string("owner") == pname then
				smartshop.update(pos, "update")
			end
			smartshop.user[pname] = nil
		end
end

minetest.register_on_player_receive_fields(function(player, form, pressed)
	if form=="smartshop.showform" then
		smartshop.receive_fields(player,pressed)
	end
end)




smartshop.update_info=function(pos)
        if not pos then
	   return
        end
	local meta=minetest.get_meta(pos)
	local spos=minetest.pos_to_string(pos)
	local inv = meta:get_inventory()
	local owner=meta:get_string("owner")
	if meta:get_int("type")==0 then
		meta:set_string("infotext","(Smartshop by " .. owner ..") Stock is unlimited")
		return false
	end
	local name=""
	local count=0
	local stuff={}
	for i=1,4,1 do
		stuff["count" ..i]=inv:get_stack("give" .. i,1):get_count()
		stuff["name" ..i]=inv:get_stack("give" .. i,1):get_name()
		stuff["stock" ..i]=0 -- stuff["count" ..i]
		local mg_price = smartshop.minegeldtonumber(inv:get_stack("pay" .. i,1))
		if mg_price ~= nil then
		   stuff["pay"..i] = mg_price/stuff["count" ..i]
		end
		stuff["buy" ..i]=0
		for ii=1,32,1 do
			name=inv:get_stack("main",ii):get_name()
			count=inv:get_stack("main",ii):get_count()
			if name==stuff["name" ..i] then
				stuff["stock" ..i]=stuff["stock" ..i]+count
			end
		end
		local nstr=(stuff["stock" ..i]/stuff["count" ..i]) ..""
		nstr=nstr.split(nstr, ".")
		stuff["buy" ..i]=tonumber(nstr[1])
		if stuff["name" ..i]=="" or stuff["buy" ..i]==0 then
			stuff["buy" ..i]=""
			stuff["name" ..i]=""
			if smartshop.stuffsold[spos..i] then
			   smartshop.itemsatpos(spos, smartshop.stuffsold[spos..i], 0)
			   smartshop.itempriceatpos(spos, smartshop.stuffsold[spos..i], nil)
			   smartshop.stuffsold[spos..i] = nil
			end						   
		else
		   smartshop.itemsatpos(spos, stuff["name"..i], stuff["buy"..i]*stuff["count" ..i])
		   smartshop.itempriceatpos(spos, stuff["name"..i], stuff["pay"..i])
		   smartshop.stuffsold[spos..i] = stuff["name"..i]
		   stuff["name"..i] = smartshop.get_human_name(stuff["name"..i])
		   stuff["buy" ..i]="(" ..stuff["buy" ..i] ..") "
		   stuff["name" ..i]=stuff["name" ..i] .."\n"
		end
	end
		meta:set_string("infotext",
		"(Smartshop by " .. owner ..") Purchases left:\n"
		.. stuff.buy1 ..  stuff.name1
		.. stuff.buy2 ..  stuff.name2
		.. stuff.buy3 ..  stuff.name3
		.. stuff.buy4 ..  stuff.name4
		)
end




smartshop.update=function(p,stat)
--clear
	local pos = table.copy(p) -- do not overwrite the pos table, we need it later!
	local spos=minetest.pos_to_string(pos)
	for _, ob in ipairs(minetest.env:get_objects_inside_radius(pos, 2)) do
		if ob and ob:get_luaentity() and ob:get_luaentity().smartshop and ob:get_luaentity().pos==spos then
			ob:remove()	
		end
	end
	if stat=="clear" then return end
--update
	local meta=minetest.get_meta(pos)
	local inv = meta:get_inventory()
	local node=minetest.get_node(pos)
	local dp = smartshop.dir[node.param2+1]
	if not dp then return end
	pos.x = pos.x + dp.x*0.01
	pos.y = pos.y + dp.y*6.5/16
	pos.z = pos.z + dp.z*0.01
	for i=1,4,1 do
		local item=inv:get_stack("give" .. i,1):get_name()
		local pos2=smartshop.dpos[node.param2+1][i]
		if item~="" then
			smartshop.tmp.item=item
			smartshop.tmp.pos=spos
			local e = minetest.env:add_entity({x=pos.x+pos2.x,y=pos.y+pos2.y,z=pos.z+pos2.z},"smartshop:item")
			e:setyaw(math.pi*2 - node.param2 * math.pi/2)
		end
	end
end


minetest.register_entity("smartshop:item",{
	hp_max = 1,
	visual="wielditem",
	visual_size={x=.20,y=.20},
	collisionbox = {0,0,0,0,0,0},
	physical=false,
	textures={"air"},
	smartshop=true,
	type="",
	on_activate = function(self, staticdata)
		if smartshop.tmp.item ~= nil then
			self.item=smartshop.tmp.item
			self.pos=smartshop.tmp.pos
			smartshop.tmp={}
		else
			if staticdata ~= nil and staticdata ~= "" then
				local data = staticdata:split(';')
				if data and data[1] and data[2] then
					self.item = data[1]
					self.pos = data[2]
				end
			end
		end
		if self.item ~= nil then
			self.object:set_properties({textures={self.item}})
		else
			self.object:remove()
		end
	end,
	get_staticdata = function(self)
		if self.item ~= nil and self.pos ~= nil then
			return self.item .. ';' ..  self.pos
		end
		return ""
	end,
})


smartshop.showform=function(pos,player,re)
	local meta=minetest.get_meta(pos)
	local creative=meta:get_int("creative")
	local inv = meta:get_inventory()
	local gui=""
	local spos=pos.x .. "," .. pos.y .. "," .. pos.z
	local owner=meta:get_string("owner")==player:get_player_name()
	if minetest.check_player_privs(player:get_player_name(), {protection_bypass=true}) then owner=true end
	if re then owner=false end
	smartshop.user[player:get_player_name()]= {pos, owner}
	if owner then
	        meta:set_int("alerted",0) -- Player has been there to refill
		gui=""
		.."size[8,11]"
		.."button_exit[6,0;1.5,1;customer;Customer]"
		.."label[0,0.2;Item:]"
		.."label[0,1.2;Price:]"
		.."label[0,2.2;Channel:]"
		.."list[nodemeta:" .. spos .. ";give1;2,0;1,1;]"
		.."list[nodemeta:" .. spos .. ";pay1;2,1;1,1;]"
		.."list[nodemeta:" .. spos .. ";give2;3,0;1,1;]"
		.."list[nodemeta:" .. spos .. ";pay2;3,1;1,1;]"
		.."list[nodemeta:" .. spos .. ";give3;4,0;1,1;]"
		.."list[nodemeta:" .. spos .. ";pay3;4,1;1,1;]"
		.."list[nodemeta:" .. spos .. ";give4;5,0;1,1;]"
		.."list[nodemeta:" .. spos .. ";pay4;5,1;1,1;]"
		.."field[2.2,2.2;6,1;channel;;".. meta:get_string("channel") .."]"
		if creative==1 then
			if meta:get_int("type")==0 then 
				gui=gui .."label[0.5,-0.4;Your stock is unlimited because you have creative or give]"
			end
			gui = gui.."button[6,1;2.2,1;tooglelime;Toggle limit]"
		end
		gui=gui
		.."list[nodemeta:" .. spos .. ";main;0,3;8,4;]"
		.."list[current_player;main;0,7.2;8,4;]"
		.."listring[nodemeta:" .. spos .. ";main]"
		.."listring[current_player;main]"
	else
		gui=""
		.."size[8,6]"
		.."list[current_player;main;0,2.2;8,4;]"
		.."label[0,0.2;Item:]"
		.."label[0,1.2;Price:]"
		.."list[nodemeta:" .. spos .. ";give1;2,0;1,1;]"
		.."item_image_button[2,1;1,1;".. inv:get_stack("pay1",1):get_name() ..";buy1;\n\n\b\b\b\b\b" .. inv:get_stack("pay1",1):get_count() .."]"
		.."list[nodemeta:" .. spos .. ";give2;3,0;1,1;]"
		.."item_image_button[3,1;1,1;".. inv:get_stack("pay2",1):get_name() ..";buy2;\n\n\b\b\b\b\b" .. inv:get_stack("pay2",1):get_count() .."]"
		.."list[nodemeta:" .. spos .. ";give3;4,0;1,1;]"
		.."item_image_button[4,1;1,1;".. inv:get_stack("pay3",1):get_name() ..";buy3;\n\n\b\b\b\b\b" .. inv:get_stack("pay3",1):get_count() .."]"
		.."list[nodemeta:" .. spos .. ";give4;5,0;1,1;]"
		.."item_image_button[5,1;1,1;".. inv:get_stack("pay4",1):get_name() ..";buy4;\n\n\b\b\b\b\b" .. inv:get_stack("pay4",1):get_count() .."]"
	end
	minetest.after((0.1), function(gui)
		return minetest.show_formspec(player:get_player_name(), "smartshop.showform",gui)
	end, gui)
end

minetest.register_node("smartshop:shop", {
	description = "Smartshop",
	tiles = {"default_chest_top.png^[colorize:#ffffff77^default_obsidian_glass.png"},
	groups = {choppy = 2, oddly_breakable_by_hand = 1,tubedevice = 1, tubedevice_receiver = 1},
	drawtype="nodebox",
	node_box = {type="fixed",fixed={-0.5,-0.5,-0.0,0.5,0.5,0.5}},
	paramtype2="facedir",
	paramtype = "light",
	sunlight_propagates = true,
	light_source = 10,
	tube = {insert_object = function(pos, node, stack, direction)
			local meta = minetest.get_meta(pos)
			local inv = meta:get_inventory()
			local added = inv:add_item("main", stack)
			smartshop.update_info(pos)
			return added
		end,
		can_insert = function(pos, node, stack, direction)
			local meta = minetest.get_meta(pos)
			local inv = meta:get_inventory()
			for i=1,4 do
			   local sellitem = inv:get_stack("give"..i,1):get_name()
			   if sellitem == stack:get_name() then
			      return inv:room_for_item("main", stack)
			   end
			end
			--			
			return false
		end,
		input_inventory = "main",
		connect_sides = {left = 1, right = 1, front = 1, back = 1, top = 1, bottom = 1}},
	digilines = {
			receptor = {
				
			},
			effector = {
				-- invoked when this node receives a message from digiline
				---@param position_of_message table
				---@param nodedef table
				---@param channel string
				---@param message {type:'get'|'set',offer:{give:string, give_count:number, pay:string, pay_count:number}[]}
				action = function(position_of_message, nodedef, channel, message)
					local meta = minetest.get_meta(position_of_message)
					local setchan = meta:get_string("channel")
					if setchan ~= channel then return end

					if type(message) == 'table' and type(message.type) =='string' then
						local inventory = meta:get_inventory();
						if message.type == 'get' then
							local mainlist = inventory:get_list('main')
							local sendmessage = {
								offer = smartshop.get_offer(position_of_message),
								inventory = {},
							}
							for index, stack in pairs(mainlist) do
								sendmessage.inventory[index] = stack:to_table()
							end
							digiline:receptor_send(position_of_message, digiline.rules.default, setchan, sendmessage)
						elseif message.type == 'set' and message.offer then
							for i = 1, 4, 1 do
								local current_offer = message.offer[i]
								if type(current_offer)=='table' and current_offer.give and current_offer.pay then
									local give_item = ItemStack(current_offer.give);
									local pay_item = ItemStack(current_offer.pay);
									if minetest.registered_items[give_item:get_name()] and minetest.registered_items[pay_item:get_name()]  then
										if type(current_offer.give_count) == "number"  then
											give_item:set_count(math.floor(current_offer.give_count))
										end
										inventory:set_stack('give'..i, 1, give_item)
										if type(current_offer.pay_count) == "number"  then
											pay_item:set_count(math.floor(current_offer.pay_count))
										end
										inventory:set_stack('pay'..i, 1, pay_item)
									end
								end
							end
						end
					end
				end
			}
	},
after_place_node = function(pos, placer)
		local meta=minetest.get_meta(pos)
		meta:set_string("owner",placer:get_player_name())
		meta:set_string("channel",placer:get_player_name())
		meta:set_string("infotext", "Shop by: " .. placer:get_player_name())
		meta:set_int("type",1)
		if is_creative(placer:get_player_name()) then
			meta:set_int("creative",1)
			meta:set_int("type",0)
		end
	end,
on_construct = function(pos)
		local meta=minetest.get_meta(pos)
		meta:set_int("state", 0)
		meta:get_inventory():set_size("main", 32)
		meta:get_inventory():set_size("give1", 1)
		meta:get_inventory():set_size("pay1", 1)
		meta:get_inventory():set_size("give2", 1)
		meta:get_inventory():set_size("pay2", 1)
		meta:get_inventory():set_size("give3", 1)
		meta:get_inventory():set_size("pay3", 1)
		meta:get_inventory():set_size("give4", 1)
		meta:get_inventory():set_size("pay4", 1)
		meta:set_int("ghost", 1)
	end,
on_rightclick = function(pos, node, player, itemstack, pointed_thing)
		smartshop.showform(pos,player)
		smartshop.update(pos, "update")
	end,
allow_metadata_inventory_put = function(pos, listname, index, stack, player)
   if minetest.get_meta(pos):get_string("owner")==player:get_player_name() or minetest.check_player_privs(player:get_player_name(), {protection_bypass=true}) then
      local meta = minetest.get_meta(pos)
      if meta:get_int("ghost") == 1 and (string.find(listname, "pay") or string.find(listname, "give")) then
	 local inv = minetest.get_inventory({type="node", pos=pos})
	 if inv:get_stack(listname, index):get_name() == stack:get_name() then
	    inv:add_item(listname, stack)
	 else
	    inv:set_stack(listname, index, stack)
	 end
	 return 0
      end 
      return stack:get_count()
   end
   return 0
end,
allow_metadata_inventory_take = function(pos, listname, index, stack, player)
   if minetest.get_meta(pos):get_string("owner")==player:get_player_name() or minetest.check_player_privs(player:get_player_name(), {protection_bypass=true}) then
      local meta = minetest.get_meta(pos)
      if meta:get_int("ghost") == 1 and (string.find(listname, "pay") or string.find(listname, "give")) then
	 local inv = minetest.get_inventory({type="node", pos=pos})
	 inv:set_stack(listname, index, ItemStack(""))
	 return 0
      end       
      return stack:get_count()
   end
   return 0
end,
allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
   if minetest.get_meta(pos):get_string("owner")==player:get_player_name() or minetest.check_player_privs(player:get_player_name(), {protection_bypass=true}) then
      local meta = minetest.get_meta(pos)
      local inv = minetest.get_inventory({type="node", pos=pos})
      if meta:get_int("ghost") ~= 1 then
	 return count
      end
      if (string.find(from_list, "pay") or string.find(from_list, "give")) and to_list == "main" then
	 inv:set_stack(from_list, from_index, ItemStack(""))
	 return 0	 
      elseif (string.find(to_list, "pay") or string.find(to_list, "give")) and from_list == "main" then
	 if inv:get_stack(to_list, to_index):get_name() == inv:get_stack(from_list, from_index):get_name() then
	    inv:add_item(to_list, inv:get_stack(from_list, from_index))
	 else
	    inv:set_stack(to_list, to_index, inv:get_stack(from_list, from_index))
	    inv:set_stack(from_list, from_index, inv:get_stack(from_list, from_index))	    
	 end
	 return 0
      else
	 return count
      end
   end
   return 0
end,
can_dig = function(pos, player)
		local meta=minetest.get_meta(pos)
		local inv=meta:get_inventory()
		if ((meta:get_string("owner")==player:get_player_name() or minetest.check_player_privs(player:get_player_name(), {protection_bypass=true})) and inv:is_empty("main") and inv:is_empty("pay1") and inv:is_empty("pay2") and inv:is_empty("pay3") and inv:is_empty("pay4") and inv:is_empty("give1") and inv:is_empty("give2") and inv:is_empty("give3") and inv:is_empty("give4")) or meta:get_string("owner")=="" then
			smartshop.update(pos,"clear")
			return true
		end
	end,
})

smartshop.get_item_count = function(name)
   sum = 0
   if smartshop.itemstats[name] == nil then
      return 0
   end
   for i, k in pairs(smartshop.itemstats[name]) do
      sum = sum + k
   end
   return sum
end

smartshop.get_shop_count = function(name)
   sum = 0
   if smartshop.itemstats[name] == nil then
      return 0
   end
   for i, k in pairs(smartshop.itemstats[name]) do
      sum = sum + 1
   end
   return sum
end

smartshop.get_item_price = function(name)
   sum = smartshop.get_item_count(name)
   if smartshop.itemprices[name] == nil then
      return 0
   end
   if sum == 0 then
      return 0
   end
   psum = 0
   for i, k in pairs(smartshop.itemprices[name]) do
      psum = psum + k*smartshop.itemstats[name][i]
   end
   return psum/sum
end


minetest.register_chatcommand("smstats", {
	description = "Get number of items sold",
	params = "<item_name>",
	func = function(plname, params)
		local name = params:match("(%S+)")
		if not (name) then
			return false, "Usage: /smstats <itemname>"
		end
		if not smartshop.itemstats[name] then
		   return false, "No stats on "..name
		end
		sum = smartshop.get_item_count(name)
		minetest.chat_send_player(plname, "Number of items: "..sum)
		minetest.chat_send_player(plname, "Number of shops offering item: "..smartshop.get_shop_count(name))
		if sum == 0 then
		   return
		end
		price = smartshop.get_item_price(name)
		minetest.chat_send_player(plname, "Average price: "..string.format("%.3f",price))
		return true
--		local ok, e = xban.ban_player(plname, name, nil, reason)
--		return ok, ok and ("Banned %s."):format(plname) or e
	end,
})

smartshop.report = function ()
   local file = io.open(minetest.get_worldpath().."/smartshop_report.txt", "w")
   if not file then
      return false, "could not write to file"
   end
   for i,k in pairs(smartshop.itemstats) do
      local count = smartshop.get_item_count(i)
      local price = smartshop.get_item_price(i)
      file:write(i.." "..count.." "..string.format("%.3f", price).." "..smartshop.get_shop_count(i).."\n")
   end
   file:close()
end

minetest.register_chatcommand("smreport", {			      
	description = "Get number of items sold",
	func = function(plname, params)
	   smartshop.report()
	end,
})

local timer = 0
minetest.register_globalstep(function(dtime)
	timer = timer + dtime;
	if timer >= 100 then
	   smartshop.report()
	   timer = 0
	end
end)


if false then -- This lbm is used to add pre-update smartshops to the price database. Activate with care! Warning: very slow.
   minetest.register_lbm({
	 name = "smartshop:update",
	 nodenames = {"smartshop:shop"},
	 action = function(pos, node)
	    smartshop.update_info(pos)	   
	 end,
   })
end


-- load itemstats
local file = io.open(minetest.get_worldpath().."/smartshop_itemcounts.txt", "r")
if file then
   local table = minetest.deserialize(file:read("*all"))
   if type(table) == "table" then
      smartshop.itemstats = table
   end
end
local file = io.open(minetest.get_worldpath().."/smartshop_itemprices.txt", "r")
if file then
   local table = minetest.deserialize(file:read("*all"))
   if type(table) == "table" then
      smartshop.itemprices = table
   end
end