techpack/smartline/icta/controller.lua

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--[[
ICTA Controller
===============
Part of the SmartLine mod
Copyright (C) 2018 Joachim Stolberg
LGPLv2.1+
See LICENSE.txt for more information
controller.lua
]]--
--
-- Helper functions
--
local function gen_table(size, val)
local tbl = {}
for idx = 1,size do
if type(val) == "table" then
tbl[idx] = table.copy(val)
else
tbl[idx] = val
end
end
return tbl
end
local function integer(s, min, max)
if s and s ~= "" and s:find("^%d+$") then
local num = tonumber(s)
if num < min then num = min end
if num > max then num = max end
return num
end
return min
end
local sOUTPUT = "Edit commands (see help)"
local Cache = {}
local FS_DATA = gen_table(smartline.NUM_RULES, {})
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local function output(pos, text, flush_buffer)
local meta = minetest.get_meta(pos)
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if not flush_buffer then
text = meta:get_string("output") .. "\n" .. (text or "")
text = text:sub(-500,-1)
end
meta:set_string("output", text)
meta:set_string("formspec", smartline.formspecOutput(meta))
end
----------------- template -------------------------------
-- -- Rule 1
-- if env.blocked[1] == false and env.ticks % <cycle> == 0 then
-- env.result[1] = <check condition>
-- env.blocked[1] = env.result[1] <expected result>
-- if env.blocked[1] then
-- env.timer[1] = env.ticks + <after>
-- end
-- env.conditions[1] = env.blocked[1]
-- else
-- env.conditions[1] = false
-- end
-- if env.blocked[1] and env.timer[1] == env.ticks then
-- <action>
-- env.blocked[1] = false
-- end
-- -- Callback variant
-- if env.blocked[1] == false and env.ticks % <cycle> == 0 then
-- env.result[1], env.blocked[1] = <callback>
-- if env.blocked[1] then
-- env.timer[1] = env.ticks + <after>
-- end
-- env.conditions[1] = env.blocked[1]
-- else
-- env.conditions[1] = false
-- end
-- if env.blocked[1] and env.timer[1] == env.ticks then
-- <action>
-- env.blocked[1] = false
-- end
-- cyclic execution
local TemplCyc = [[
-- Rule #
if env.blocked[#] == false and env.ticks %% %s == 0 then
env.result[#] = %s
env.blocked[#] = env.result[#] %s
if env.blocked[#] then
env.timer[#] = env.ticks + %s
end
env.condition[#] = env.blocked[#]
else
env.condition[#] = false
end
if env.blocked[#] and env.timer[#] == env.ticks then
%s
env.blocked[#] = false
end
]]
-- event based execution
local TemplEvt = [[
-- Rule #
if env.blocked[#] == false and env.event then
env.result[#] = %s
env.blocked[#] = env.result[#] %s
if env.blocked[#] then
env.timer[#] = env.ticks + %s
end
env.condition[#] = env.blocked[#]
else
env.condition[#] = false
end
if env.blocked[#] and env.timer[#] == env.ticks then
%s
env.blocked[#] = false
end
]]
-- event based execution of callback function
local TemplEvtClbk = [[
-- Rule #
if env.blocked[#] == false and env.event then
env.result[#], env.blocked[#] = %s(env, %s)
if env.blocked[#] then
env.timer[#] = env.ticks + %s
end
env.condition[#] = env.blocked[#]
else
env.condition[#] = false
end
if env.blocked[#] and env.timer[#] == env.ticks then
%s
env.blocked[#] = false
end
]]
-- generate the Lua code from the NUM_RULES rules
local function generate(pos, meta, environ)
local fs_data = minetest.deserialize(meta:get_string("fs_data")) or FS_DATA
-- chunks are compiled as vararg functions. Parameters are available via: local a, b, c = ...
local tbl = {"local env, output = ...\n"}
for idx = 1,smartline.NUM_RULES do
local cycle = integer(fs_data[idx].cycle, 0, 1000)
local cond, result = smartline.code_condition(fs_data[idx].cond, environ)
local after = integer(fs_data[idx].after, 0, 1000)
local actn = smartline.code_action(fs_data[idx].actn, environ)
-- valid rule?
if cycle and cond and after and actn then
-- add rule number
local s
if cycle == 0 then -- event?
if result then
s = string.format(TemplEvt, cond, result, after, actn)
else -- callback function
local data = dump(fs_data[idx].cond)
s = string.format(TemplEvtClbk, cond, data, after, actn)
end
else -- cyclic
s = string.format(TemplCyc, cycle, cond, result, after, actn)
end
-- add to list of rules
tbl[#tbl+1] = s:gsub("#", idx)
elseif cond ~= nil and actn == nil then
output(pos, "Error in action in rule "..idx)
elseif cond == nil and actn ~= nil then
output(pos, "Error in condition in rule "..idx)
end
end
return table.concat(tbl)
end
local function runtime_environ(pos)
return {
ticks = 0,
pos = pos,
timer = gen_table(8, 0),
blocked = gen_table(8, false),
result = gen_table(8, false),
condition = gen_table(8, false),
input = {}, -- node number is key
}
end
local function compile(pos, meta, number)
local gen_environ = {
meta = meta,
pos = pos,
number = number,
owner = meta:get_string("owner"),
}
local text = generate(pos, meta, gen_environ)
if text then
local code, err = loadstring(text)
if code then
Cache[number] = {
code = code,
env = runtime_environ(pos),
}
return true
else
output(pos, err)
return false
end
end
return false
end
local function execute(pos, number, event)
local code = Cache[number].code
local env = Cache[number].env
if event then
env.event = true
else
env.event = false
env.ticks = env.ticks + 1
end
local res, err = pcall(code, env, output)
if not res then
output(pos, err)
return false
end
return true
end
local function battery(pos)
local battery_pos = minetest.find_node_near(pos, 1, {"smartline:battery", "sl_controller:battery"})
if battery_pos then
local meta = minetest.get_meta(pos)
meta:set_string("battery", minetest.pos_to_string(battery_pos))
return true
end
return false
end
local function start_controller(pos, meta)
local number = meta:get_string("number")
if not battery(pos) then
meta:set_string("formspec", smartline.formspecError(meta))
return false
end
meta:set_string("output", "<press update>")
meta:set_int("cpu", 0)
if compile(pos, meta, number) then
meta:set_int("state", tubelib.RUNNING)
minetest.get_node_timer(pos):start(1)
local fs_data = minetest.deserialize(meta:get_string("fs_data")) or FS_DATA
meta:set_string("formspec", smartline.formspecRules(meta, fs_data, sOUTPUT))
meta:set_string("infotext", "Controller "..number..": running")
return true
end
return false
end
local function stop_controller(pos, meta)
local number = meta:get_string("number")
meta:set_int("state", tubelib.STOPPED)
minetest.get_node_timer(pos):stop()
meta:set_string("infotext", "Controller "..number..": stopped")
local fs_data = minetest.deserialize(meta:get_string("fs_data")) or FS_DATA
meta:set_string("formspec", smartline.formspecRules(meta, fs_data, sOUTPUT))
end
local function no_battery(pos)
local meta = minetest.get_meta(pos)
local number = meta:get_string("number")
meta:set_int("state", tubelib.STOPPED)
minetest.get_node_timer(pos):stop()
meta:set_string("infotext", "Controller "..number..": No battery")
meta:set_string("formspec", smartline.formspecError(meta))
end
local function update_battery(meta, cpu)
local pos = minetest.string_to_pos(meta:get_string("battery"))
if pos then
meta = minetest.get_meta(pos)
local content = meta:get_int("content") - cpu
if content <= 0 then
meta:set_int("content", 0)
return false
end
meta:set_int("content", content)
return true
end
end
local function on_timer(pos, elapsed)
local meta = minetest.get_meta(pos)
local t = minetest.get_us_time()
local number = meta:get_string("number")
if Cache[number] or compile(pos, meta, number) then
local res = execute(pos, number, elapsed == -1)
if res then
t = minetest.get_us_time() - t
if not update_battery(meta, t) then
no_battery(pos)
return false
end
end
--print("on_timer", t)
return res
end
return false
end
local function on_receive_fields(pos, formname, fields, player)
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
if not player or not player:is_player() then
return
end
if player:get_player_name() ~= owner then
return
end
--print("fields", dump(fields))
if fields.quit then -- cancel button
return
end
if fields.notes then -- notes tab?
meta:set_string("notes", fields.notes)
end
if fields.go then
local fs_data = minetest.deserialize(meta:get_string("fs_data")) or FS_DATA
local output = smartline.edit_command(fs_data, fields.cmnd)
stop_controller(pos, meta)
meta:set_string("formspec", smartline.formspecRules(meta, fs_data, output))
meta:set_string("fs_data", minetest.serialize(fs_data))
end
if fields._type_ == "main" then
smartline.store_main_form_data(meta, fields)
local key = smartline.main_form_button_pressed(fields)
if key then
-- store data before going into sub-menu
meta:set_string("fs_old", meta:get_string("fs_data"))
meta:set_string("formspec", smartline.formspecSubMenu(meta, key))
end
elseif fields._col_ == "cond" then
smartline.cond_formspec_update(meta, fields)
elseif fields._col_ == "actn" then
smartline.actn_formspec_update(meta, fields)
end
if fields._exit_ == "ok" then -- exit from sub-menu?
if fields._button_ then
smartline.formspec_button_update(meta, fields)
end
-- simulate tab selection
fields.tab = "1"
elseif fields._cancel_ == "cancel" then -- abort from sub-menu?
-- restore old data
meta:set_string("fs_data", meta:get_string("fs_old"))
-- simulate tab selection
fields.tab = "1"
elseif fields.save == "Save" then -- abort from sub-menu?
-- store as old data
meta:set_string("fs_old", meta:get_string("fs_data"))
-- simulate tab selection
fields.tab = "1"
elseif fields.sb_help then
local evt = minetest.explode_scrollbar_event(fields.sb_help)
meta:set_string("formspec", smartline.formspecHelp(evt.value))
end
if fields.update then
meta:set_string("formspec", smartline.formspecOutput(meta))
elseif fields.clear then
meta:set_string("output", "<press update>")
meta:set_string("formspec", smartline.formspecOutput(meta))
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elseif fields.list then
local fs_data = minetest.deserialize(meta:get_string("fs_data")) or FS_DATA
local s = smartline.listing(fs_data)
output(pos, s, true)
elseif fields.tab == "1" then
local fs_data = minetest.deserialize(meta:get_string("fs_data")) or FS_DATA
meta:set_string("formspec", smartline.formspecRules(meta, fs_data, sOUTPUT))
elseif fields.tab == "2" then
meta:set_string("formspec", smartline.formspecOutput(meta))
elseif fields.tab == "3" then
meta:set_string("formspec", smartline.formspecNotes(meta))
elseif fields.tab == "4" then
meta:set_string("formspec", smartline.formspecHelp(1))
elseif fields.start == "Start" then
local environ = {
meta = meta,
pos = pos,
number = meta:get_string("number"),
owner = meta:get_string("owner"),
}
--print("CODE:", generate(pos, meta, environ))
start_controller(pos, meta)
minetest.log("action", player:get_player_name() ..
" starts the smartline_controller2 at ".. minetest.pos_to_string(pos))
elseif fields.stop == "Stop" then
stop_controller(pos, meta)
end
end
minetest.register_node("smartline:controller2", {
description = "SmartLine Controller",
inventory_image = "smartline_controller_inventory.png",
wield_image = "smartline_controller_inventory.png",
stack_max = 1,
tiles = {
-- up, down, right, left, back, front
"smartline.png",
"smartline.png",
"smartline.png",
"smartline.png",
"smartline.png",
"smartline.png^smartline_controller.png",
},
drawtype = "nodebox",
node_box = {
type = "fixed",
fixed = {
{ -6/32, -6/32, 14/32, 6/32, 6/32, 16/32},
},
},
after_place_node = function(pos, placer)
local meta = minetest.get_meta(pos)
local number = tubelib.add_node(pos, "smartline:controller2")
local fs_data = FS_DATA
meta:set_string("fs_data", minetest.serialize(fs_data))
meta:set_string("owner", placer:get_player_name())
meta:set_string("number", number)
meta:set_int("state", tubelib.STOPPED)
meta:set_string("formspec", smartline.formspecRules(meta, fs_data, sOUTPUT))
--meta:set_string("formspec", smartline.cond_formspec(1, 1, nil))
meta:set_string("infotext", "SmartLine Controller "..number..": stopped")
end,
on_receive_fields = on_receive_fields,
on_dig = function(pos, node, puncher, pointed_thing)
if minetest.is_protected(pos, puncher:get_player_name()) then
return
end
minetest.node_dig(pos, node, puncher, pointed_thing)
tubelib.remove_node(pos)
end,
on_timer = on_timer,
paramtype = "light",
sunlight_propagates = true,
paramtype2 = "facedir",
groups = {choppy=1, cracky=1, crumbly=1},
is_ground_content = false,
sounds = default.node_sound_stone_defaults(),
})
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minetest.register_craft({
output = "smartline:controller2",
recipe = {
{"", "default:mese_crystal", ""},
{"dye:blue", "default:copper_ingot", "tubelib:wlanchip"},
{"", "default:mese_crystal", ""},
},
})
-- write inputs from remote nodes
local function set_input(pos, own_number, rmt_number, val)
if rmt_number then
if Cache[own_number] and Cache[own_number].env.input then
local t = minetest.get_us_time()
Cache[own_number].env.input[rmt_number] = val
Cache[own_number].env.last_event = t
-- only two events per second
if not Cache[own_number].last_event or Cache[own_number].last_event < t then
minetest.after(0.01, on_timer, pos, -1)
Cache[own_number].last_event = t + 500000 -- add 500 ms
end
end
end
end
tubelib.register_node("smartline:controller2", {}, {
on_recv_message = function(pos, topic, payload)
local meta = minetest.get_meta(pos)
local number = meta:get_string("number")
local state = meta:get_int("state")
if state == tubelib.RUNNING and topic == "on" then
set_input(pos, number, payload, topic)
elseif state == tubelib.RUNNING and topic == "off" then
set_input(pos, number, payload, topic)
elseif topic == "state" then
local state = meta:get_int("state")
return tubelib.statestring(state)
else
return "unsupported"
end
end,
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on_node_load = function(pos)
local meta = minetest.get_meta(pos)
if meta:get_int("state") == tubelib.RUNNING then
minetest.get_node_timer(pos):start(1)
end
end,
})