feat: inject _update_ts into all JSON responses for global OTA updates

gate.lua

@@ -340,6 +340,8 @@ local function httpRequest(method, url, body, headers)
   end
 end
 
+local checkGlobalUpdate = nil
+
 local function postCheck(url, payload)
   local okBody, body = pcall(textutils.serializeJSON, payload)
   if not okBody then return false end
@@ -347,6 +349,7 @@ local function postCheck(url, payload)
   if not ok then return false, data end
   local okJ, parsed = pcall(textutils.unserializeJSON, data or "")
   if not okJ then return false, data end
+  if checkGlobalUpdate then checkGlobalUpdate(parsed) end
   return true, parsed
 end
 
@@ -355,6 +358,7 @@ local function getJSON(url)
   if not ok then return false, data end
   local okJ, parsed = pcall(textutils.unserializeJSON, data or "")
   if not okJ then return false, data end
+  if checkGlobalUpdate then checkGlobalUpdate(parsed) end
   return true, parsed
 end
 
@@ -915,6 +919,48 @@ end
 
 drawReadyScreen()
 
+checkGlobalUpdate = function(parsed)
+  if type(parsed) == 'table' and parsed._update_ts then
+    local remoteTs = tonumber(parsed._update_ts)
+    if remoteTs and remoteTs > 0 then
+      local attemptFile = ".last_update_ts"
+      local tried = 0
+      if fs.exists(attemptFile) then
+        local f = fs.open(attemptFile, "r")
+        tried = tonumber(f and f.readAll() or "0") or 0
+        if f then f.close() end
+      end
+      if remoteTs > tried then
+        isUpdating = true
+        pcall(drawReadyScreen)
+        sleep(0.5)
+        
+        local f = fs.open(attemptFile, "w")
+        if f then f.write(tostring(remoteTs)); f.close() end
+        
+        local env = setmetatable({ AUTO_UPDATE_SILENT = true }, { __index = _G or getfenv() or _ENV })
+        local fn, err = loadfile("update_gate.lua", env)
+        if fn then
+          local ok, res = pcall(fn, "--silent")
+          if not ok then
+            lastUpdateError = string.sub(tostring(res), 1, 30)
+          end
+        else
+          lastUpdateError = "loadfile failed: " .. tostring(err)
+        end
+        
+        isUpdating = false
+        pcall(drawReadyScreen)
+        
+        if lastUpdateError then
+          sleep(3)
+        end
+        os.reboot()
+      end
+    end
+  end
+end
+
 local function collectInspectionDevices(side, modeBySideRef)
   local sideKnown = trimSide(side) ~= nil
   local inspectionDevs = {}