machines/web01/linkal/default.nix

@@ -1,8 +1,10 @@
-_:
+{ sources, pkgs, lib, ... }:
 
 let
   host = "cal.dgnum.eu";
 
+  metis2linkal = import ./metis-to-linkal.nix { inherit pkgs lib; };
+
   calendarGroups = {
     luj-current = {
       port = 8444;
@@ -19,6 +21,10 @@ let
         };
       };
     };
+    ens = {
+      port = 8445;
+      calendars = metis2linkal sources.metis;
+    };
   };
 in {
   imports = [ ./module.nix ];

machines/web01/linkal/metis-to-linkal.nix

@@ -0,0 +1,24 @@
+{ 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
+    "https://${providers.${upstream}}/remote.php/dav/public-calendars/${identifier}"
+    ;
+
+in
+  mapDeepAttrs toLinkal calendars