From bb1f34149aae679b720aae259a132a3d7f52a853 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bjo=CC=88rn=20Ritzl?= <bjorn.ritzl@gmail.com>
Date: Tue, 10 Dec 2019 07:11:30 +0100
Subject: [PATCH] Check if proxy is missing resources when loading/showing it

Fixes #56
---
 monarch/monarch.lua | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/monarch/monarch.lua b/monarch/monarch.lua
index bc10447..d04c2ef 100644
--- a/monarch/monarch.lua
+++ b/monarch/monarch.lua
@@ -371,6 +371,13 @@ local function preload(screen)
 	screen.preloading = true
 	if screen.proxy then
 		log("preload() proxy")
+		local missing_resources = collectionproxy.missing_resources(screen.proxy)
+		if #missing_resources > 0 then
+			local error_message = ("preload() collection proxy %s is missing resources"):format(tostring(screen.id))
+			log(error_message)
+			screen.preloading = false
+			return false, error_message
+		end
 		screen.wait_for = PROXY_LOADED
 		msg.post(screen.proxy, ASYNC_LOAD)
 		coroutine.yield()