From 7236b1b65077dd97499d6678fae858567fc9d04e Mon Sep 17 00:00:00 2001
From: Ted Trask <ttrask01@yahoo.com>
Date: Thu, 9 Jul 2015 15:53:01 -0400
Subject: Modify the process_put script to revert bad changes

If the set_device_params function fails, notify the phone to pull its config and revert the change

(cherry picked from commit 1805de3c2b759ac9a5309bba551b81c862d0c489)
---
 config/process_put.lua | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/config/process_put.lua b/config/process_put.lua
index 1fed1ae..e203cf0 100644
--- a/config/process_put.lua
+++ b/config/process_put.lua
@@ -3,6 +3,26 @@ local functions, mac, data, device_id = ...
 
 --functions.logevent("got to process_put script")
 
+local function findip(mac)
+	if not mac or mac == "" then
+		return nil
+	end
+	local ipaddr = functions.getselectresponse("SELECT ip FROM provisioning_requests WHERE mac~*'"..functions.escape(mac).."'")
+	if ipaddr and ipaddr[1] then
+		return ipaddr[1].ip
+	end
+end
+
+local notify_device = function(mac, extension)
+	local ipaddr = findip(mac)
+	if ipaddr then
+		--functions.logevent("Notifying "..ipaddr.." to update for "..(mac or ""))
+		os.execute("/etc/provisioning/notify_device "..ipaddr.." "..extension)
+	else
+		--functions.logevent("Warning - could not find IP address for "..(mac or ""))
+	end
+end
+
 -- Get the params
 local params = functions.get_device_params(device_id)
 
@@ -75,5 +95,14 @@ end
 -- Update the params
 local params = functions.set_device_params(params)
 
+-- If the update fails, notify the phone to revert the config change
+if params.errtxt and params.value.device and params.value.device.value.mac then
+	exten = ""
+	if params.value.reg1 and params.value.reg1.value.extension then
+		exten = params.value.reg1.value.extension.value
+	end
+	notify_device(params.value.device.value.mac.value, exten)
+end
+
 -- Return the updated data
 return data
-- 
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