Persist and resume Create production state

create_boiler_display.lua

@@ -5,6 +5,7 @@ local REFRESH_SECONDS = 1
 local MIN_WIDTH = 38
 local MIN_HEIGHT = 14
 local CLUTCH_OUTPUT_SIDE = "left"
+local STATE_FILE = "create_boiler_state.txt"
 
 local BOILERS = {
   { label = "BOILER 1", position = { 11266, 64, 10810 } },
@@ -14,6 +15,26 @@ local BOILERS = {
 
 local clutchButton = { x1 = 0, x2 = 0, y = 0 }
 
+local function loadProductionState()
+  if not fs.exists(STATE_FILE) then return false end
+  local handle = fs.open(STATE_FILE, "r")
+  if not handle then return false end
+  local saved = handle.readAll()
+  handle.close()
+  return saved == "RUNNING"
+end
+
+local function saveProductionState(running)
+  local handle = fs.open(STATE_FILE, "w")
+  if not handle then return false end
+  handle.write(running and "RUNNING" or "STOPPED")
+  handle.close()
+  return true
+end
+
+local productionRunning = loadProductionState()
+redstone.setOutput(CLUTCH_OUTPUT_SIDE, productionRunning)
+
 local monitor = peripheral.find("monitor")
 if not monitor then
   error("Kein Monitor gefunden. Monitor direkt oder per Wired Modem verbinden.", 0)
@@ -152,8 +173,7 @@ local function drawClutchButton(height)
   local width = monitor.getSize()
   -- With the external redstone-torch inverter, output ON means the clutch is
   -- unpowered and production runs. Output OFF is the fail-safe stopped state.
-  local running = redstone.getOutput(CLUTCH_OUTPUT_SIDE)
-  local label = running and " PRODUCTION: RUNNING " or " PRODUCTION: STOPPED "
+  local label = productionRunning and " PRODUCTION: RUNNING " or " PRODUCTION: STOPPED "
   local x = math.max(1, math.floor((width - #label) / 2) + 1)
   local y = math.max(13, height - 1)
 
@@ -165,15 +185,16 @@ local function drawClutchButton(height)
   monitor.setBackgroundColor(colors.black)
   monitor.write((" "):rep(width))
   monitor.setCursorPos(x, y)
-  monitor.setBackgroundColor(running and colors.lime or colors.red)
+  monitor.setBackgroundColor(productionRunning and colors.lime or colors.red)
   monitor.setTextColor(colors.black)
   monitor.write(label)
   monitor.setBackgroundColor(colors.black)
 end
 
 local function toggleProduction()
-  local running = redstone.getOutput(CLUTCH_OUTPUT_SIDE)
-  redstone.setOutput(CLUTCH_OUTPUT_SIDE, not running)
+  productionRunning = not productionRunning
+  redstone.setOutput(CLUTCH_OUTPUT_SIDE, productionRunning)
+  saveProductionState(productionRunning)
 end
 
 local function render()