Fixed surface handling

Changed thumbnail size

.gitignore

@@ -0,0 +1 @@
+*.zip

README.md

@@ -1,5 +1,5 @@
-# Gun_Turret_Alerts
-![mod thumbnail](https://raw.githubusercontent.com/Wyrrrd/Gun_Turret_Alerts/master/thumbnail.png)
+# Gun Turret Alerts
+<img src=https://raw.githubusercontent.com/Wyrrrd/Gun_Turret_Alerts/master/thumbnail.png width="128" height="128">
 
 (Please note: This is a quick and dirty port to 0.18. As soon as the original is ported to 0.18, this will be removed.)
 
@@ -7,4 +7,4 @@ Description
 - Adds alerts when a gun turret is out of ammo or has low ammo. 
 
 Credit:
-- Thanks to [unhott](https://mods.factorio.com/user/unhott) for the [original mod](https://mods.factorio.com/mod/GunTurretAlerts).
+- Thanks to [unhott](https://mods.factorio.com/user/unhott) for the [original mod](https://mods.factorio.com/mod/GunTurretAlerts).

changelog.txt

@@ -0,0 +1,18 @@
+---------------------------------------------------------------------------------------------------
+Version: 0.18.1
+Date: 2020-03-19
+  Changes:
+    - Added changelog file
+    - Changed dependency to base 0.18
+  Bugfixes:
+    - Redesigned surface handling to ensure compatibility with other planets and Blueprint Lab
+---------------------------------------------------------------------------------------------------
+Version: 0.18.0
+Date: 2020-02-20
+  Changes:
+    - Ported to 0.18
+    - Renamed mod for upload in mod portal
+    - Matched versioning to Factorio versions
+
+  Graphics:
+    - Added thumbnail

control.lua

@@ -1,24 +1,16 @@
 --control.lua
 --This mod scans the map for gun-turrets and places alerts when turrets are low. 
 
-
 script.on_event({defines.events.on_tick}, function (event)
-	--Every minute the surface is rescanned for ammo-turret type entities. This is stored in the global table. 
-	if event.tick%3600 == 0 or global.turret_entities == nil then
-		local planet = game.surfaces
-		for index,value in pairs(planet) do
-			global.turret_entities = planet[index].find_entities_filtered{type = "ammo-turret"}
-		end
-	end
-	
-    if event.tick%600 == 0 then
+	if event.tick%600 == 0 then
 	--Every 10 seconds recheck and give alerts to players for ammo-turret entities on the same force as them. 
 		for index,player in pairs(game.connected_players) do
 			
 			GTA_enabled = player.mod_settings["gun-turret-alerts-enabled"].value
 			player_threshold = player.mod_settings["gun-turret-alerts-threshold"].value
+			turret_entities = player.surface.find_entities_filtered{type = "ammo-turret"}
 			if GTA_enabled then
-				for index2, turret_entity in pairs(global.turret_entities) do
+				for index2, turret_entity in pairs(turret_entities) do
 					if turret_entity.valid then
 						inv_var = turret_entity.get_inventory(defines.inventory.turret_ammo)
 						if inv_var.is_empty() then
@@ -37,8 +29,5 @@ script.on_event({defines.events.on_tick}, function (event)
 				end
 			end
 		end
-	end 
-end)
-
-
-
+	end
+end)

info.json

@@ -1,10 +1,9 @@
 {
     "name": "Gun_Turret_Alerts",
-    "version": "0.18.0",
+    "version": "0.18.1",
     "title": "Gun_Turret_Alerts",
     "author": "Wyrrrd",
-    "homepage": "",
     "factorio_version": "0.18",
-    "dependencies": ["base >= 0.16"],
+    "dependencies": ["base >= 0.18"],
     "description": "Adds map alerts for players when a turret is either out of ammo or has low ammo"
 }