Enhance configuration loading: implement file check and JSON parsing for dynamic channel settings

craftingTurtle.lua

@@ -5,7 +5,7 @@
 -- Requires a wired modem attached to the turtle.
 
 -------------------------------------------------
--- Configuration
+-- Default configuration (overridden by .turtle_config)
 -------------------------------------------------
 
 -- Modem channels (must match inventoryManager.lua)
@@ -15,6 +15,29 @@ local CRAFT_REPLY_CHANNEL = 4204  -- turtle -> master (craft results)
 -- Crafting grid slots in a turtle's 4x4 inventory
 local CRAFT_SLOTS = {1, 2, 3, 5, 6, 7, 9, 10, 11}
 
+-------------------------------------------------
+-- Load config from file if present
+-------------------------------------------------
+
+local TURTLE_CONFIG_FILE = ".turtle_config"
+
+local function loadConfig()
+    if not fs.exists(TURTLE_CONFIG_FILE) then return end
+    local f = fs.open(TURTLE_CONFIG_FILE, "r")
+    local data = f.readAll()
+    f.close()
+    local ok, cfg = pcall(textutils.unserialiseJSON, data)
+    if not ok or not cfg then
+        print("[WARN] Failed to parse " .. TURTLE_CONFIG_FILE)
+        return
+    end
+    if cfg.craftChannel      then CRAFT_CHANNEL       = cfg.craftChannel      end
+    if cfg.craftReplyChannel then CRAFT_REPLY_CHANNEL = cfg.craftReplyChannel end
+    print("[CONFIG] Loaded from " .. TURTLE_CONFIG_FILE)
+end
+
+loadConfig()
+
 -------------------------------------------------
 -- Setup
 -------------------------------------------------