Add network broadcasting functionality for client displays and command handling

inventoryManager.lua

@@ -15,6 +15,11 @@ local CACHE_FILE     = ".inventory_cache"  -- persistent cache file
 local SMELTER_MONITOR_SIDE = "top"
 local DISABLED_RECIPES_FILE = ".disabled_recipes"
 
+-- Network sync (for client displays)
+local BROADCAST_CHANNEL  = 4200
+local ORDER_CHANNEL      = 4201
+local BROADCAST_INTERVAL = 1   -- seconds between state broadcasts
+
 -------------------------------------------------
 -- Furnace types to manage
 -------------------------------------------------
@@ -651,6 +656,8 @@ local mon = nil
 local monName = nil
 local smelterMon = nil
 local smelterMonName = nil
+local networkModem = nil
+local networkModemName = nil
 
 local function setupMonitor()
     mon = peripheral.wrap(MONITOR_SIDE)
@@ -2133,6 +2140,36 @@ local function handleSmelterTouch(x, y)
     end
 end
 
+-------------------------------------------------
+-- Network broadcast (sends state to client displays)
+-------------------------------------------------
+
+local function broadcastState()
+    if not networkModem then return end
+    local state = {
+        type            = "state",
+        cache           = {
+            itemList      = cache.itemList,
+            grandTotal    = cache.grandTotal,
+            chestCount    = cache.chestCount,
+            totalSlots    = cache.totalSlots,
+            usedSlots     = cache.usedSlots,
+            freeSlots     = cache.freeSlots,
+            usedRatio     = cache.usedRatio,
+            dropperOk     = cache.dropperOk,
+            barrelOk      = cache.barrelOk,
+            furnaceCount  = cache.furnaceCount,
+            furnaceStatus = cache.furnaceStatus,
+        },
+        activity        = activity,
+        alerts          = activeAlerts,
+        smeltingPaused  = smeltingPaused,
+        disabledRecipes = disabledRecipes,
+        smeltable       = SMELTABLE,
+    }
+    networkModem.transmit(BROADCAST_CHANNEL, ORDER_CHANNEL, state)
+end
+
 -------------------------------------------------
 -- Main
 -------------------------------------------------
@@ -2167,6 +2204,21 @@ local function main()
         print("[WARN] No smelter monitor on " .. SMELTER_MONITOR_SIDE)
     end
 
+    -- Find modem for client communication
+    for _, name in ipairs(peripheral.getNames()) do
+        if peripheral.getType(name) == "modem" then
+            networkModem = peripheral.wrap(name)
+            networkModemName = name
+            networkModem.open(ORDER_CHANNEL)
+            break
+        end
+    end
+    if networkModem then
+        print("[OK]   Network modem: " .. networkModemName)
+    else
+        print("[WARN] No modem found for client sync")
+    end
+
     -- Load recipe toggles from disk
     loadDisabledRecipes()
     if smeltingPaused then
@@ -2404,6 +2456,73 @@ local function main()
                     handleTouch(x, y)
                 end
             end
+        end,
+
+        -- Task 10: Network state broadcast
+        function()
+            while true do
+                pcall(broadcastState)
+                sleep(BROADCAST_INTERVAL)
+            end
+        end,
+
+        -- Task 11: Network order/command listener
+        function()
+            if not networkModem then return end
+            while true do
+                local event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
+                if channel == ORDER_CHANNEL and type(message) == "table" then
+                    if message.type == "order" and message.itemName and message.amount then
+                        print(string.format("[NET] Order: %s x%d", message.itemName, message.amount))
+                        local success = orderItem(message.itemName, message.amount)
+                        networkModem.transmit(replyChannel, ORDER_CHANNEL, {
+                            type    = "order_result",
+                            success = success,
+                            message = statusMessage,
+                            color   = statusColor,
+                        })
+                        pcall(broadcastState)
+                    elseif message.type == "scan" then
+                        print("[NET] Scan request from client")
+                        pcall(refreshCache)
+                        pcall(checkAlerts)
+                        needsRedraw = true
+                        smelterNeedsRedraw = true
+                        pcall(broadcastState)
+                    elseif message.type == "toggle_pause" then
+                        smeltingPaused = not smeltingPaused
+                        print("[NET] Smelting " .. (smeltingPaused and "PAUSED" or "RESUMED"))
+                        saveDisabledRecipes()
+                        smelterNeedsRedraw = true
+                        needsRedraw = true
+                        pcall(broadcastState)
+                    elseif message.type == "toggle_recipe" and message.recipe then
+                        if disabledRecipes[message.recipe] then
+                            disabledRecipes[message.recipe] = nil
+                        else
+                            disabledRecipes[message.recipe] = true
+                        end
+                        print("[NET] Recipe toggle: " .. message.recipe)
+                        saveDisabledRecipes()
+                        smelterNeedsRedraw = true
+                        pcall(broadcastState)
+                    elseif message.type == "enable_all" then
+                        disabledRecipes = {}
+                        print("[NET] All recipes enabled")
+                        saveDisabledRecipes()
+                        smelterNeedsRedraw = true
+                        pcall(broadcastState)
+                    elseif message.type == "disable_all" then
+                        for inputName in pairs(SMELTABLE) do
+                            disabledRecipes[inputName] = true
+                        end
+                        print("[NET] All recipes disabled")
+                        saveDisabledRecipes()
+                        smelterNeedsRedraw = true
+                        pcall(broadcastState)
+                    end
+                end
+            end
         end
     )
 end