add base system

core/photo_mode/collection_manager.gd

@@ -0,0 +1,26 @@
+extends Node
+
+signal on_collectible_unlocked(collectible_id: String)
+
+#TODO -> assign library resource to game_state
+var library: CollectibleLibrary = preload("res://core/photo_mode/collectible_library.tres")
+var unlocked_ids: Array[String] = ['cane']
+
+func unlock_photo(collectible_id: String) -> void:
+	if not collectible_id in unlocked_ids:
+		unlocked_ids.append(collectible_id)
+		var new_collectible = get_collectible_by_id(collectible_id)
+		if new_collectible:
+			on_collectible_unlocked.emit(collectible_id)
+
+func get_collectible_by_id(id: String) -> CollectibleResource:
+	for collectible in library.collectibles:
+		if collectible.id == id:
+			return collectible
+	return null
+
+func get_all_collectibles() -> Array[CollectibleResource]:
+	return library.collectibles
+
+func get_unlocked_collectible_ids() -> Array[String]:
+	return unlocked_ids