feat(inferium-harvester): implement fetchRemotePlan

inferium-harvester.lua

@@ -2,11 +2,13 @@ local utils = require('libs/utils')
 local turtleUtils = require('libs/turtle-utils')
 local config = require('config/harvesting')
 
-local VERSION = "0.5.0"
+local VERSION = "0.6.0"
 local IDLE_TIME = 2
 local WAIT_ITEM_IDLE_TIME = 5
 local MIN_FUEL_NEEDED = (100 + config.firstCropZ + config.length) * 2
 local MIN_FREE_SLOTS_BEFORE_COMPACT = 4
+local INFERIUM_QUERY_PORT = 111
+local INFERIUM_REPLY_PORT = 112
 
 -- a table with the list of current crops
 local localPlan = nil
@@ -256,9 +258,39 @@ local function retrieveLocalPlan()
   goBackToHome()
 end
 
+-- TODO: fetch timeout ?
 local function fetchRemotePlan()
-  -- TODO
-  return config.defaultRemotePlan or {}
+  local fallbackPlan = config.defaultRemotePlan or {}
+
+  local modem = peripheral.find("modem")
+
+  if not modem then
+    return fallbackPlan
+  end
+
+  modem.open(INFERIUM_REPLY_PORT)
+
+  local message = { type = 'getplan', payload = { computerId = os.getComputerID() } }
+  modem.transmit(INFERIUM_QUERY_PORT, INFERIUM_REPLY_PORT, textutils.serialize(message))
+
+  local channel, replyRawMessage
+  repeat
+    _, _, channel, _, replyRawMessage = os.pullEvent("modem_message")
+  until channel == INFERIUM_REPLY_PORT
+
+  modem.close(INFERIUM_REPLY_PORT)
+
+  if not replyRawMessage then
+    return fallbackPlan
+  end
+
+  local replyMessage = textutils.unserialize(replyRawMessage)
+
+  if replyMessage and replyMessage.payload then
+    return replyMessage.payload
+  end
+
+  return fallbackPlan
 end
 
 local function removeSeeds(seeds)