Exported getSideOf into module utils

recv_file

@@ -1,22 +1,18 @@
-local sides = peripheral.getNames()
+dofile("utils")
-for i = 1, #sides do
+modemSide = utils.getSideOf("modem") --get side the modem is on
-    if peripheral.getType(sides[i]) == "modem" then
-        modemSide = sides[i]
-        break
-    end
-end
 
 rednet.open(modemSide)
 
+--get message, no timeout
 id, msg, dist = rednet.receive()
-print("Received data:")
-term.write("Filename: ")
-name = tostring(read())
 
-print(msg)
+print("Received data:")
+term.write("Output filename: ")
+name = tostring(read())
+--decompress string
 content = textutils.unserialize(msg)
+--write to file
 local file = fs.open(name, "w")
 file.write(content)
 file.close()
-
 rednet.close(modemSide)

send_file

@@ -1,10 +1,5 @@
-local sides = peripheral.getNames()
+dofile("utils")
-for i = 1, #sides do
+modemSide = utils.getSideOf("modem")
-    if peripheral.getType(sides[i]) == "modem" then
-        modemSide = sides[i]
-        break
-    end
-end
 
 rednet.open(modemSide)
 

utils

@@ -0,0 +1,15 @@
+--lua module "utils" for random utilities
+if utils then return end --avoid loading twice
+utils = {}
+
+function utils.getSideOf(name) --get which side, if any, a peripheral p is connected to
+	local sides = peripheral.getNames()
+	for i = 1, #sides do
+	    if peripheral.getType(sides[i]) == name then
+			--found it!
+	        return sides[i]
+	    end
+	end
+end
+
+return utils