# SPDX-FileCopyrightText: 2024 Maurice Debray <maurice.debray@dgnum.eu>
#
# SPDX-License-Identifier: EUPL-1.2

{ lib, pkgs }:
source:
let
  #import metis stuff
  metisCalendarData = builtins.fromJSON (builtins.readFile (source + /data/calendars.json));
  calendars = metisCalendarData.sources;
  inherit (import source { inherit pkgs; }) providers;

  # helper function to map 2-level deep attribute-sets
  mapDeepAttrs =
    mapFct:
    lib.concatMapAttrs (name: value: lib.mapAttrs' (name': value': mapFct name name' value') value);

  toLinkal = upstream: identifier: lib.nameValuePair "${providers.${upstream}}${identifier}";
in
mapDeepAttrs toLinkal calendars