feat: Add train pre-arrival broadcast via CRN create_target

station_broadcast.lua

@@ -2,7 +2,7 @@
 -- ============================================================================
 -- 1. Configuration & Constants
 -- ============================================================================
-local APP_VERSION_TEXT = "v1.0.19"
+local APP_VERSION_TEXT = "v1.0.20"
 
 local CONFIG = {
     CLOUD_URL = "ws://stabadmin.fse-media.group",
@@ -120,6 +120,11 @@ function Peripherals.init()
     end
     -- Speakers
     Peripherals.speakers = { peripheral.find("speaker") }
+    -- Create Target Block (CRN)
+    Peripherals.createTarget = peripheral.find("create_target")
+    if Peripherals.createTarget then
+        pcall(Peripherals.createTarget.resize, 80, 10)
+    end
 end
 
 -- ============================================================================
@@ -2229,9 +2234,47 @@ end
 -- 8. Main Logic
 -- ============================================================================
 local Main = {}
+State.announcedApproaching = {}
 
 function Main.loop()
     while true do
+        if Peripherals.createTarget then
+            local lines = Peripherals.createTarget.dump()
+            for _, lineText in pairs(lines) do
+                if lineText and lineText ~= "" and lineText:match("[%w%?%[]") then
+                    local etaVal, etaUnit, tName, dest
+                    etaVal, etaUnit, tName, dest = string.match(lineText, "^(%d+)%s+(.-)%s+(%[.-%][^%s]*)%s+(.*)$")
+                    if not tName then
+                        etaVal, etaUnit, tName, dest = string.match(lineText, "^([^%s]+)%s+(.-)%s+(%[.-%][^%s]*)%s+(.*)$")
+                    end
+                    if not tName then
+                        etaVal, etaUnit, tName, dest = string.match(lineText, "^([^%s]+)%s+(.-)%s+([^%s]+)%s+(.*)$")
+                    end
+                    
+                    if tName and etaVal then
+                        if etaVal == "1" or etaVal == "现在" then
+                            local announceKey = tName .. "_" .. dest
+                            local now = os.epoch("utc")
+                            -- Prevent spamming: only announce once per minute per train
+                            if not State.announcedApproaching[announceKey] or (now - State.announcedApproaching[announceKey] > 60000) then
+                                State.announcedApproaching[announceKey] = now
+                                Utils.log("INFO", "Train Approaching: " .. tName)
+                                Network.send({
+                                    type = "train_approaching",
+                                    stationName = State.stationName,
+                                    stationCode = State.stationCode,
+                                    stationPlatform = State.stationPlatform,
+                                    trainId = tName,
+                                    destination = dest,
+                                    eta = etaVal
+                                })
+                            end
+                        end
+                    end
+                end
+            end
+        end
+
         if not Peripherals.station then
             State.currentTrain = nil
             Display.render()