module to set requests in logi chests to blueprint total costs

modules/blueprint_requesting.lua

@@ -0,0 +1,34 @@
+--module by Hanakocz
+local Event = require 'utils.event'
+
+local function on_gui_closed(event)
+    local entity = event.entity
+    if not entity or not entity.valid then return end
+    if entity.name == 'logistic-chest-requester' or entity.name == 'logistic-chest-buffer' then
+        local inventory = entity.get_inventory(defines.inventory.chest)
+        if not inventory or not inventory.valid then return end
+        if inventory.get_item_count('blueprint') > 0 then
+            local items = {}
+            for i = 1, #inventory, 1 do
+                if inventory[i].valid_for_read and inventory[i].is_blueprint then
+                    local cost = inventory[i].cost_to_build
+                    for name, amount in pairs(cost) do
+                        items[name] = (items[name] or 0) + amount
+                    end
+                end
+            end
+            if entity.request_slot_count > 0 then
+                for slot = 1, entity.request_slot_count, 1 do
+                    entity.clear_request_slot(slot)
+                end
+            end
+            local slot_index = 1
+            for item, amount in pairs(items) do
+                entity.set_request_slot({name = item, count = amount}, slot_index)
+                slot_index = slot_index + 1
+            end
+        end
+    end
+end
+
+Event.add(defines.events.on_gui_closed, on_gui_closed)