Add load/save box to db, cleanup a bit boxes and add chatcommands

mods/boxes/depends.txt

@@ -0,0 +1 @@
+db

mods/boxes/init.lua

@@ -512,9 +512,25 @@ local function write_file(filename, data)
 	end
 end
 
-local entry_lobby_data = read_file(minetest.get_modpath(minetest.get_current_modname()) .. "/entry.box")
+local modpath = minetest.get_modpath(minetest.get_current_modname())
-local exit_lobby_data = read_file(minetest.get_modpath(minetest.get_current_modname()) .. "/exit.box")
+local worldpath = minetest.get_worldpath()
-local box_data = read_file(minetest.get_modpath(minetest.get_current_modname()) .. "/box.box")
+
+local entry_lobby_data = read_file(worldpath .. "/entry.box")
+if entry_lobby_data == "" then
+	entry_lobby_data = read_file(modpath .. "/entry.box")
+	write_file(worldpath .. "/entry.box", entry_lobby_data)
+end
+
+local exit_lobby_data = read_file(worldpath .. "/exit.box")
+if exit_lobby_data == "" then
+	exit_lobby_data = read_file(modpath .. "/exit.box")
+	write_file(worldpath .. "/exit.box", exit_lobby_data)
+end
+
+if db.box_get_data(0) == "" then
+	local box_data = read_file(modpath .. "/box.box")
+	db.box_set_data(0, box_data)
+end
 
 local function pop_node(pos)
 	local node = minetest.get_node(pos)
@@ -530,42 +546,56 @@ local function unpop_node(data)
 	meta:from_table(data.meta)
 end
 
-local function open_door(player, pos)
+local function open_door(player, minp, maxp)
-	local nds = {
+	local nds = {}
-		pop_node(pos),
+	local i = 1
-		pop_node(vector.add(pos, {x = -1, y = 0, z = 0})),
+	for x = minp.x, maxp.x do
-		pop_node(vector.add(pos, {x =  0, y = 1, z = 0})),
+		for y = minp.y, maxp.y do
-		pop_node(vector.add(pos, {x = -1, y = 1, z = 0})),
+			for z = minp.z, maxp.z do
-	}
+				nds[i] = pop_node({x = x, y = y, z = z})
-	local od = players_in_boxes[player:get_player_name()].open_doors
+				i = i + 1
-	od[#od + 1] = { minx = pos.x + 0.5, nodes = nds }
-end
-
-minetest.register_globalstep(function(dtime)
-		for playername, info in pairs(players_in_boxes) do
-			local i = 1
-			local player = minetest.get_player_by_name(playername)
-			local pos = player:get_pos()
-			local od = info.open_doors
-			local n = #od
-			while od[i] do
-				if pos.x >= od[i].minx then
-					for _, dt in ipairs(od[i].nodes) do
-						unpop_node(dt)
-					end
-					od[i] = od[n]
-					od[n] = nil
-					n = n - 1
-				else
-					i = i + 1
-				end
 			end
 		end
+	end
+	local od = players_in_boxes[player:get_player_name()].open_doors
+	od[#od + 1] = {minx = maxp.x + 0.5, nodes = nds}
+end
+
+function boxes.open_exit(player)
+	local name = player:get_player_name()
+	local ex = players_in_boxes[name].exit_door
+	open_door(player, vector.add(ex, {x = -1, y = 0, z = 0}), vector.add(ex, {x = 0, y = 1, z = 0}))
+end
+
+-- Close doors behind players
+minetest.register_globalstep(function(dtime)
+	for playername, info in pairs(players_in_boxes) do
+		local i = 1
+		local player = minetest.get_player_by_name(playername)
+		local pos = player:get_pos()
+		local doors = info.open_doors
+		local n = #doors
+		while doors[i] do
+			if pos.x >= doors[i].minx then
+				for _, data in ipairs(doors[i].nodes) do
+					unpop_node(data)
+				end
+				doors[i] = doors[n]
+				doors[n] = nil
+				n = n - 1
+			else
+				i = i + 1
+			end
+		end
+	end
 end)
 
 function boxes.start_box(player, box_data)
 	local name = player:get_player_name()
-	assert(players_in_boxes[name] == nil)
+	if players_in_boxes[name] ~= nil then
+		return
+	end
+
 	local box = boxes.read_box(box_data)
 	local lobby_spawn = boxes.read_box(entry_lobby_data)
 	local lobby_exit = boxes.read_box(exit_lobby_data)
@@ -588,16 +618,62 @@ function boxes.start_box(player, box_data)
 	player:set_pos(vector.add(minp, vector.add(spawn_offset, lobby_spawn.entry)))
 	players_in_boxes[name] = {
 		minp = minp,
+		maxp = vector.add(minp, vector.subtract(pmax, 1)),
+		exit_door = vector.add(minp, vector.add(box_offset, box.exit)),
 		open_doors = {},
 	}
-	open_door(player, vector.add(minp, vector.add(box_offset, box.entry)))
+	local entry_door = vector.add(minp, vector.add(box_offset, box.entry))
-	open_door(player, vector.add(minp, vector.add(box_offset, box.exit)))
+	open_door(player, vector.add(entry_door, {x = -1, y = 0, z = 0}),
+	                  vector.add(entry_door, {x = 0, y = 1, z = 0}))
+
+	boxes.open_exit(player)
 end
 
--- test code
+function boxes.end_box(player)
+	local name = player:get_player_name()
+	if players_in_boxes[name] == nil then
+		return
+	end
 
-minetest.after(5, function()
+	local bx = players_in_boxes[name]
+	boxes.cleanup(bx.minp, bx.maxp)
+	boxes.vfree(bx.minp)
+	players_in_boxes[name] = nil
+end
+
+
+minetest.register_chatcommand("enter", {
+	params = "<boxid>",
+	description = "Enter box with this id",
+	privs = {server = true},
+	func = function(name, param)
+		local player = minetest.get_player_by_name(name)
+		local id = tonumber(param)
+		if not id then
+			return
+		end
+		local data = db.box_get_data(id)
+		if not data then
+			return
+		end
+		boxes.start_box(player, data)
+	end,
+})
+
+minetest.register_chatcommand("leave", {
+	params = "",
+	description = "Leave the current box",
+	privs = {server = true},
+	func = function(name, param)
+		local player = minetest.get_player_by_name(name)
+		boxes.end_box(player)
+	end,
+})
+
+
+-- old test code
 --[[
+minetest.after(5, function()
 	local data = boxes.save({x = -1, y = -4, z = -1},
 	                        {x =  1, y = -2, z =  1})
 	print(string.len(data))
@@ -609,9 +685,7 @@ minetest.after(5, function()
 	print(dump(boxes_tree))
 	boxes.vfree(minp)
 	print(dump(boxes_tree))
-]]
 
---[[
 	local data_spawn = boxes.save({x = -35, y = -32, z = 56},
 	                              {x = -33, y = -29, z = 64})
 	local data_exit = boxes.save({x = -10, y = -32, z = 53},
@@ -642,9 +716,8 @@ minetest.after(5, function()
 	write_file(path .. "/entry.box", boxes.write_box(sp))
 	write_file(path .. "/exit.box", boxes.write_box(ex))
 	write_file(path .. "/box.box", boxes.write_box(bx))
-]]
 
 	local player = minetest.get_player_by_name("singleplayer")
-	boxes.start_box(player, box_data)
+	boxes.start_box(player, db.box_get_data(0))
 end)
-
+]]

mods/db/init.lua

@@ -89,6 +89,38 @@ function db.player_put_meta(name, meta)
 	end
 end
 
+function db.box_get_data(box_id)
+  local stmt = itb_db:prepare[[
+    SELECT data FROM box WHERE id = :box_id
+    ]]
+  stmt:bind_names{box_id = box_id}
+  for row in stmt:nrows() do
+    stmt:finalize()
+    return row.data
+  end
+  stmt:finalize()
+
+  print("no such box in db", box_id)
+  return nil
+
+end
+
+function db.box_set_data(box_id, data)
+  local stmt = itb_db:prepare[[
+    INSERT INTO box (id, data) VALUES(:box_id, :box_data)
+  ]]
+  stmt:bind_names{box_id = box_id, box_data = data}
+  local r = stmt:step()
+  stmt:finalize()
+  if not r then
+    print("error writing")
+    return false
+  else
+    return true
+  end
+end
+
+
 minetest.register_on_shutdown(function()
 	itb_db:close()
 end)