Added Crafting Machine

scripts/RecipeDB.gd

@@ -4,7 +4,38 @@ class_name RecipeDB
 export(Array, Resource) var recipes
 
 func find_recipe(item_type_1: Resource, item_type_2: Resource) -> Resource:
+	assert(item_type_1 != null)
+	assert(item_type_2 != null)
+	var in_items = {}
+	if item_type_1 == item_type_2:
+		in_items[item_type_1] = 2
+	else:
+		in_items[item_type_1] = 1
+		in_items[item_type_2] = 1
+		
 	for recipe in recipes:
-		pass
-		# TODO, find recipe
-	return recipes[0] # This is just stubbed; remove later
+		if recipe.item_type_in_1 == null or recipe.item_type_in_2 == null or recipe.item_type_out == null:
+			continue
+			
+		var items = [recipe.item_type_in_1, recipe.item_type_in_2]
+		# build cost map
+		var total_cost = {}
+		for n in 2:
+			if total_cost.has(items[n]):
+				total_cost[items[n]] += 1
+			else:
+				total_cost[items[n]] = 1
+				
+		# check if you can afford the cost
+		var cost_met : bool = true
+		for item_type in total_cost.keys():
+			if not in_items.has(item_type):
+				cost_met = false
+				break
+			if in_items[item_type] < total_cost[item_type]:
+				cost_met = false
+				break
+			
+		if cost_met:
+			return recipe.item_type_out
+	return null

scripts/crafting_machine.gd

@@ -0,0 +1,40 @@
+extends Spatial
+
+export var recipes: Resource
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	assert(recipes != null)
+
+func craft_item():
+	var crafted_item = recipes.find_recipe($slot_1.item_in_hold.item_type, $slot_2.item_in_hold.item_type)
+	if crafted_item == null:
+		return
+	$slot_1.destroy_item()
+	$slot_2.destroy_item()
+	$craft_item_holder.spawn_item(crafted_item)	
+
+func _on_coin_machine_coin_requirement_met(player):
+	if not $slot_1.has_item():
+		print("Slot 1 item missing")
+		return
+	if not $slot_2.has_item():
+		print("Slot 2 item missing")
+		return
+	craft_item()
+	
+func should_enable_coin_machine():
+	if $craft_item_holder.has_item():
+		return false
+	if not $slot_1.has_item() or not $slot_2.has_item():
+		return false
+	return true
+
+func _on_craft_item_holder_item_changed(item):
+	$coin_machine.enabled = should_enable_coin_machine()
+
+func _on_slot_1_item_changed(item):
+	$coin_machine.enabled = should_enable_coin_machine()
+
+func _on_slot_2_item_changed(item):
+	$coin_machine.enabled = should_enable_coin_machine()